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1
Chen, Wei-Hao, and 陳韋豪. "Study on Sediment Bypassing of Shimen Reservoir." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/82444762865856971223.
Full textAbstract:
碩士國立交通大學
土木工程學系
101
Shimen Reservoir with the function of water supply contributes to the north of Taiwan enormously. Nowadays, the problem of sediment deposition in Shimen Reservoir is more and more seriously. It becomes more important to deal with the deposition efficiently. Recently, there have been many research about sediment bypassing in Shimen Reservoir. There are three alternative cases about sediment bypassing, which are C1 case(with extension tube in Dawanping), D2 modified case(in Amouping) and C1(with extension tube)+D2 modified case. The functions of these cases which are drainage and desilting on C1 case, only drainage on D2 case, and joint operation of C1and D2 case. This study simulates sedimentation of Shimen Reservoir before and after with sediment bypassing operation with one-dimensional mobile mode tool in order to comprehend that the erosion and deposition of bed changes and the desilting efficiency of outlets. From the simulation results in this study, we can know that the erosion and deposition in the reservoir occur downstream of the bypassing tunnel. The more water discharge from sediment bypassing tunnel, the less desilting efficiency of outlets will be improve. After considering the three cases, the reductions of sediment release efficiency of existing outlets are 12.54%, 6.26%, and 11.61%, respectively. The improvement of C1case (with extension tube) is most obvious, followed by C1(with extension tube)+D2 modified case and D2 modified case.
2
LI, RO-RUN, and 李若倫. "Discussion on the Image of Shimen Reservoir Scenic Area." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/h5sw2h.
Full textAbstract:
碩士開南大學
觀光運輸學院碩士在職專班
106
The Shihmen Reservoir Scenic Area is an old tourist attraction in the Taoyuan area. It has been completed more than 50 years since its completion. However, compared with other cities and counties and Taoyuan itself, it is no longer the primary choice for tourist destinations. In the early stages of completion, whether it is domestic or domestic, Even overseas tourists will visit the Shihmen Reservoir, but now the elegance has receded. Researchers have grown up in Taoyuan since childhood. Although they have not experienced the heyday of Shihmen Reservoir, they often visit their families and visit Shihmen Reservoir. Currently, the Taoyuan Municipal Government is planning to inject funds for the Shimen Reservoir and Dahanxi River Basin planning. It is expected that the Shimen Reservoir and the surrounding areas will be The area plans to become a recreational attraction for sports tourism and combines the methods of ecological conservation to adopt low-carbon tourism. We hope that this policy can promote the reproduction of the Shihmen Reservoir. This study discusses how Shimen Reservoir now recovers from the tourism lifecycle theory. What kind of tourist image should you use to attract tourists? Interviews with the public sector, local businesses, local residents, and tourists were conducted in this study. Non-public sector respondents considered that the current municipal government's marketing campaigns for large-scale events and sightseeing spots were insufficient. Department related units reference.
3
Lee, Chia-Yun, and 李嘉芸. "A Study on the Preservation Value of Official Residence in Shimen Reservoir." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/87029932964830719759.
Full textAbstract:
碩士中原大學
建築研究所
105
Shimen Reservoir public housing area for the study, the dormitory area is located in Longtan Township good, formerly known as eleven Zhuang, from Shimen Reservoir about 3 km away. The early eleven Hakka people for the residential area, the Japanese during the construction of this light railways, to facilitate the delivery of crops, which is the first 11 Zhuang early modern development. During the Japanese occupation, in order to solve the problem of irrigation, the Japanese built Taoyuan to build the Shimen Reservoir, but because of the Pacific War at the end of the Japanese rule, the Shimen Reservoir project was interrupted. After the Nationalist government came to Taiwan, continuing to do the basic investigation, until 1953 and 1954, a continuous drought, only to accelerate the planning of the construction of reservoirs. Shimen Reservoir began construction in 1958, Taiwan invited US engineering company as a special construction consultant, completed in 1964 Shimen Reservoir, in the construction of Shimen Reservoir, in order to allow engineers to work nearby, so in 11 areas planned Shimen Reservoir staff quarters , The dormitory area is almost the same period with the Shimen Reservoir project planning, dormitory area to meet the Shimen reservoir engineering staff with their family life function. After field investigation Shimen Reservoir dormitory area, the dormitory area of the building structure and road texture to maintain the original appearance, and most of the buildings are also in accordance with the original use of function, continuous use. The residential quarters are large tracts of garden, on both sides of the road inoculated with plants, so the whole dormitory area is green, and the military that the quality of life without space compared to Shimen reservoir dormitory area has a perfect quality of life, Also on behalf of the Government on the construction of Shimen reservoir engineering staff considerable attention. After investigation, historical review, the use of cultural assets at home and abroad to save the law to explore the preservation of Shimen Reservoir dormitory value, and Shimen Reservoir dormitory area after 52 years, the landscape texture almost exactly the same as the original design, complete preservation has become a Examples of modern public housing. Shimen Reservoir dormitory area in Taiwan has a modern symbol. Shimen Reservoir dormitory area of the current research is rather scarce, mostly to the construction of Shimen Reservoir, the background-based. This study focuses on the settlement space, architectural style, landscape texture, in order to highlight the significance of settlement preservation value. The results of this study are expected to serve as a reference for the preservation and re-use program of the Shimen Reservoir Public Dormitory Area.
4
Huang, Cheng-Chia, and 黃振家. "Application of Density Current Model of Sluice Gate Operation in Shimen Reservoir." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3ysrr5.
Full textAbstract:
博士國立臺灣大學
生物環境系統工程學研究所
106
Sedimentation has been a serious problem of Taiwan reservoirs, and the rapidly trapped sediment caused by extreme flood events has affected the storage capacity. Therefore, reservoir deposition becomes a highly-discussed topic. In Taiwan, the timing of sediment release usually happens during typhoon periods. On the other hand, the density current would be produced due to the incoming hyper-concentrated flow. Hence, grasping the movement of the density current is a focused issue. In this study, a 2-D layer-averaged density current numerical model would be applied to simulate the density current flow during typhoon periods. Firstly, the field measured data were adopted to calibrate simulation parameters and to verify the simulation results. Next, three highly correlated regression equations are developed to calculate the travel velocity, arrival time, and concentration decay rate. Furthermore, a reasonable estimation of the sediment release amount can be established based on these outcomes. Lastly, the modification of the release efficiency at the bottom outlet, and the method of reservoir operation can be presented to improve the desilting strategy in the Shimen Reservoir. Above all, the flow pattern of the density current is estimable. Accordingly, this research can be adopted to predict the flow pattern of the density current due to high consistency of this model. In conclusion, this study can combine the real-time observed data to conduct the rolling prediction and provide the approximate tendency of the density current flow, and further be the reference to the early warning beneficial to reservoir management.
5
Wei, Chi-ma, and 魏綺瑪. "Scenario Projection for Local Precipitation over Shimen Reservoir Catchment Using Statistical downscaling Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/57989186790754882227.
Full textAbstract:
碩士國立成功大學
水利及海洋工程學系碩博士班
97
In this study, a statistical downscaling model, which is based on the outputs of GCMs as predictors, is first developed to simulate the daily rainfall over the Shiman reservoir catchment. Moreover, the potential of this downscaling model in simulating local rainfall is evaluated. Finally, the variability of projected local rainfall based on predictors for different scenarios is investigated. Data of observed station rainfall over the Shiman reservoir catchment are utilized for downscaling. In addition, the large-scale variables derived from NCEP/NCAR Reanalysis project and outputs of GCMs taken from IPCC AR4 are also required. The structure of this statistical downscaling model can be divided into two parts － classification and regression. Methods of multivariate and Support Vector Machine (SVM) are applied respectively to build up the classification and regression scheme. The results reveal that the statistical downscaling model based on two-step strategy performs better in simulating the daily rainfall over the Shiman reservoir catchment when compared with the downscaling model based on four-step strategy. Although the divergence exists in between the results of downscaling based on the outputs of GCMs, downscaling results based on MME strategy make reasonable and stable projections for daily rainfall. When compared with the downscaled rainfall based on outputs of 20C3M, a tendency of suppressive rainfall is found from the results downscaled by the projections of GCMs for A1B and B1 scenarios over the Shiman reservoir catchment.
6
Chen, Yong-Yu, and 陳永彧. "Application of Satellite Image to Monitor River Suspended Sediments in Shimen Reservoir Watershed." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/37sh7a.
Full textAbstract:
碩士國立中央大學
土木工程學系
105
In facing the extreme weather, Taiwan requires adequate water quality management. The current monitoring stations in watersheds around Taiwan are fixed point measurements, not enough to represent the entire catchment area. And currently the frequency of data gathering of these monitoring stations is less than once a month, which makes the number of samples are very limited. In this study, hydrological model (SWAT) and satellite imagery (SPOT and Landsat) were used to study the turbidity of water in the upstream and reservoir areas of Shimen Reservoir channel water surface area. The prediction model of turbidity of Shimen reservoir water surface area was established by satellite imagery, and calibration and verification were carried out. SWAT was employed to identify high turbidity events and then the satellite image was utilized to estimate turbidities. Discussion of the accuracy of turbidity estimation model is provided. According to the results, the application of satellite images to estimate the turbidity of Shimen reservoir water surface area is highly feasible, with the relative error being about 30%. The turbidity estimation in the water surface of reservoir is more accurate than that in the channel water surface area. This is mainly because the area of the reservoir area is open, free from being affected by the surrounding sandbar or vegetation. The accuracy of upstream channel water surface area is limited, for the depth of the water is shallow and would be affected by the noises due to high reflection. Furthermore, if the monitoring is carried out during the drought period, it is likely to be error-prone, due to the height of the water level being less than 1 m which resulting high reflectivity and resulting misjudging high water turbidity.
7
Chang, Yu-Hsuan, and 張語軒. "Investigation of Point Source and Non-point Source Pollution in Shimen Reservoir Watershed." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6ca56z.
Full textAbstract:
碩士國立臺北科技大學
土木工程系土木與防災碩士班
106
More and more attention has been paid to the issue of water resources pollution in recent years.Such as ecosystem destruction and drinking water pollution caused by eutrophication of rivers and reservoir.Water pollution can be divided into point source pollution and non-point source pollution.The difference is the point source pollution has any single identifiable source of pollution from which pollutants are discharged into the river.Such as domestic sewage and industrial wastewater.And the non-point source pollution occurs as a result of runoff when rain moves over and through the ground. This study sample point source pollution and non-point source pollution as subjects in Shimen Reservoir watershed.Investigate the water quality of different land-use areas such as Dahan River, Sanmin River, peach farmland, settlements.Testing the contaminant concentration of water quality parameters such as suspended solids, ammonia nitrogen, biochemical oxygen demand, chemical oxygen demand, total phosphorus, etc.And analysis with sampling timing, accumulated rainfall, land use, etc.Further understand the contamination characteristics, the implications of water quality parameters, and the correlation of sampling conditions of each sampling point. Research found that non-point source pollution is the main factor affecting the surface water quality.And will increase the pollution concentration as the accumulated rainfall increases.Especially in terms of biochemical oxygen demand and nutrients that more than point source pollution.The concentration of Dahan Rivers suspended solid even reached to 1300mg/L when the accumulated rainfall reached 27mm.Ammonia can be diluted in rainy day so it is not easy to sampling its peak concentration. Vendors nearby Baiji Tunnel and Settlements that have not household connection-pipes have adverse effects on water quality.The concentration of restaurants suspended solid and BOD have obvious effect in the outflow.The quality of effluent produced in residences will change significantly with daily life.Fertilizers on farms cause high levels of nutrients in non-point source pollution.And due to the bare open space and topographical factors, the soil is easily washed away.
8
Chung, Yi-Ching, and 鐘意晴. "Probe into the Regional Landslide Susceptibility Analysis-a case study in the Shimen Reservoir Catchment Area." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/e5v263.
Full textAbstract:
碩士國立中央大學
地球物理研究所
97
This study uses data set from the “Geological Investigation, Landslide-Debris Flow Investigation and their Susceptibility Evaluation on Watershed” project of the Central Geological Survey, Taiwan (CGS), and aims to improve the susceptibility model developed in the project, by using different rainfall factors and sampling schemes. All the causative factors used in the project are selected in this study; including lithology, NDVI before Aere event, slope roughness, tangential curvature, total slope height, relative slope height, wetness index and fault distance. The final selection of trigger factors is maximum rainfall intensity and total rainfall of the Aere event. Landslide inventories interpreted from SOPT images before and after Aere typhoon event and those of the Matsa typhoon event, were checked by examining rectified aerial photographs, topographic maps, and in the field, so as to establish the event-based landslide inventories. The Aere inventory is used for establishment of susceptibility model and the Matsa inventory for validation. We use different sampling schemes in the study and choose logistic regression as the main analytical method to establish the susceptibility model. We wish to select a set of sample that can expand the range of rainfall values and also raise the weights of the trigger factors. An extra data set from landslide group is selected and is put into the non-landslide group try setting the rainfall value to critical rainfall. Besides the use of logistic regression for establish susceptibility model, we also adopt discriminant analysis and fuzzy neural network in the study. The results show that AUCs of the success rate curves for logistic regression, discriminant analysis, and fuzzy neural network are 0.8579, 0.8257 and 0.8771, respectively; all show good performance. The results are validated by the data set from of the Matsa typhoon event. The results of validation show that AUCs of the prediction rate curves are 0.7867, 0.7264 and 0.7726, respectively; it is also satisfactory. Although the fuzzy neural network has the highest AUC in establishing model, it is not the highest in validation; this phenomenon may be a kind of over-training. The discriminant analysis obtained the lowest AUC in establishing model and validation. The result of logistic regression is not the best one in establishing the model, but it is the best in validation. Therefore, the logistic regression is the most effective and stable method in establishing the regional landslide prediction model.
9
Li, Ying-Lin, and 李盈林. "Application of Mining Engineering Technology to Remove the Reservoir sediments for Sustainable Management of Shimen Dam,Taiwan." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/27817591436257710067.
Full textAbstract:
碩士國立成功大學
資源工程學系碩博士班
94
An underground mining method was considered applying to remove the sedimentary sludge in Shimen Dam, northern Taiwan, which was constructed 40 years and right now, the turbidity of reservoir water always increased sharply after every times of heavy rainfall. The sedimentary sludge was seemed as a clay deposit under the water. A mineral prospecting and continuous underground mining operation can dig out most of the sludge by shafted tunnel from upper water level into beneath the clay deposit. The cost of this method are estimated NT$ 477 per cubic meter based on a scale of 14 years removing 50 million tons of clay. Not only the quality of mining product is suitable for the raw material of lightweight aggregate, but also and the quantity of mining rate can over the sedimentary rate of reservoir sludge. It would be both of prolong 15 years of reservoir life and create NT＄120 billion of economic value. And at last, it can be seen sustainable of this Shimen Reservoir by this method.
10
Jhang, Jia-yuan, and 張嘉元. "Filter clogging in Pin-Chen water treatment plant during water intake from intake well in Shimen reservoir." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/87928286005488058195.
Full textAbstract:
碩士國立中央大學
環境工程研究所
100
Due to extreme high turbidity during typhoons or heavy rains, which resulted in difficulties in potable water treatment, the water intake well to draw water from upper levels of the reservoir was built in the Shihmen reservoir. After drawing water from the intake well, it was found that the rapid sand filter was severely clogged, the head loss increased dramatically, and the filtration run-time was seriously shortened. The objectives of this study were first to investigate filter clogging in Ping-Jan Water Treatment Plant while intake water from the water intake well by water quality analysis of different water intake locations, filter-bed analysis, and pilot study. It was shown that the water qualities from different water intake locations were similar; thus, the water quality was not the cause for the clogging. From the floc retention analysis, scanning microscopy, and energy-dispersive X-ray spectroscopy of filter media, it was found that the particles only deposited on the surface of filter while intake water from the water intake well. Bubbles observed in coagulation tanks on-site and in coagulation, sedimentation, and filtration units of the pilot, it was determined that the air-binding is responsible of the filter clogging.
11
CHENG, WEI-CHIN, and 鄭維晉. "Using spatial point process to identify the influential factors for causing landslides in Shimen Reservoir Catchment Area." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6mr43p.
Full textAbstract:
碩士國立臺北大學
統計學系
107
Taiwan is located in the earthquake zone and the earthquake occurs frequently. Since Taiwan have many more than 1000-meters mountains, the river has the steep slope. This special topography and the interaction between earthquake and heavy rainfall cause the upstream region of the catchment area becomes fragile and easy to collapse and the river channel continues to withstand erosion. Thereby the life of the reservoir is affected. The Shimen Reservoir is one of the major reservoirs in northern Taiwan. If the area with high collapse potential in the catchment area can be found and prevent effectively early, it will not only prolong the life of the reservoir, but also reduce the government's fiscal expenditure. This thesis uses the intensity function of the point process to model the landslide event points in the catchment area of Shimen Reservoir and identify potential risk factors associated with the landslide event. Firstly, the quadrate counting test is used to examine the spatial point pattern in the catchment area of Shimen Reservoir. Secondly, the summary functions of the point process including K-function, pair correlation function, F-function and G-function, are used to investigate the clustering effect in the point process when the process is not complete spatial randomness. Thirdly, Log-Gaussian Cox Process (LGCP), Thomas Cluster Process, the Matérn Cluster Process are used to model the landslide event data in the study region. This research find that the study region is not complete spatial randomness. Based on 4 summary functions, we further find the clustering effect exists in the study region. 3 clustering process are then used to model the clustering effect in the landslide event data in the catchment area of Shimen Reservoir. Among them, we find that LGCP has the best fit. The result of this research can be used to identify the high risk cluster in the study area.
12
jin-yiing, Chen, and 陳俊穎. "A study in proprietor' point of view of B&B types and business strategies surrounding Shimen Reservoir." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/6n9325.
Full textAbstract:
碩士輔仁大學
大眾傳播學研究所
100
Shimen Reservoir is the most beautiful garden of Taoyuan County, because of its scenery, it is also the most important scenic spot in Taoyuan. Shimen Reservoir is located near the midstream of Da-han Stream, between Taoyuan County's Dasi, Longtan, Fusing Town and Hsinchu County’s Kansai town. It is named by the two peaks faceing each other like the rock door at the estuary. There are more than 20 B&Bs around the Shimen Reservoir, like Cien, Country Country, 1213 Farm, Sheraton Farm…etc. The development of the cultural and creative industry combines the art and culture to manage the local and community business, it could accumulate the value to establish the local brand through the marketing and management way of B&B. Therefore, this research focuses on the cultural and creative concept to combine the B&B Integrated marketing communications and management around Shimen Reservoir, and understanding the type of the present development of the surrounding B&B at Shimen Reservoir. How do they combine the cultural and creative industry to run the marketing? I designed the survey and experienced by myself. I analysed all the information I got, then I proposed according to the result. In 2002, Executive Yuan put the tourism and leisure industry into the one of the cultural and creative industries in the national development key plan in the year of 2008. B&B is one of the chains of the tourism and leisure industry.It can not only introduce local culture to the travelers during the accommodations, but also bring the travelers to experience the local culture deeply. Simply speaking, B&B can spread, enhance and glorify the local culture. It has the common characters as the cultural and creative industry. In the future, the B&B should ally with cultural and creative industry in order to transform in to unique, and potential ones. There are some conclusions in this research: （1）The managing situation of surrounding B&B at Shimen Reservoir has been developed maturely gradually. It is in the middle period of B&B development.《Around the reservoir bed and breakfasts development in early infancy, is the passenger travel demand factors derived generally houses provides paid lodging business model; Secondly, the stages of growth in the medium term B & B, some B & B industry has been the brand name, but still only focus on providingbasic needs and mode of operation of the equipment; now, more than half of B & B industry towards a diversified business model, the business philosophy of service by the characteristics of the items is expected to create a more competitive business scope of cultural and creative B & B》 （2）In using the natural resources,it’s better to use the forest to build the leisure farm style of B&B which can look down at the reservoir. （3）The motivation of the owner of B&B can be classified into four types: following God’s will, searching for the ideal, couple management and opportunistic part-time management. There are three type of operating B&B: full-time management, family-run and run the business with relatives and friends. There are four levels of B&B: cultural and creative B&B, lower-price B&B and high-price B&B. （4）The surrounding B&B at the reservoir do really combine with cultural and creative activities by themselves, because they know the cultural and creative industry very well. They used to have lots of the water sport and fishing during the summer time. And They only cooperate with the local government to hold the cultural and creative activities. （5）Although the surrounding B&B use a lot of Integrated Marketing, they use the blog or website to promote their business very well, especially during low season. It’s a pity they do not use the Trivia Game, agricultural product diy activity or the cultural and creative art activities. I am an owner of B&B, also a graduate student. my view is that B & B is a form of the cultural and creative industry, these two are closely related. If we develope B & B's cultural and creative well, the tourism industry will be more developed.
13
Qiu, Fa-zhong, and 邱法忠. "A Water Control and Ecology Jointly Constructed Park：A Case Study on Left Bank of the Shimen Reservoir Rear Pool." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/46809637958355230119.
Full textAbstract:
碩士中原大學
建築研究所
97
Shihmen reservoir revetment pool will be destroyed whenever the storm, for which the Government invested a billion dollars prone repair of public funds, to ensure that the revetment features, for the funds to play its proper construction, to explore the root of the problem of research and combining local characteristics and the residents demand, the main reason for this, and as the competent authority to promote management's proposal. This article explores the left side of the pool after the typhoon disaster damaged revetment reasons, similar to features of the reference at home and abroad in recent ecological engineering methods, to develop the sustainable building measures revetment. After the original pool of 13 hectares of concrete to build a revetment and its hinterland integration of the local landscape, the artificial auxiliary into a natural, natural completion of the natural environment has nurtured the concept of artificial landscapes. Strengthened with pool revetment rehabilitation function of ecological engineering methods for water control structure and hydrophilic park. Revetment adapt to natural erosion to downstream flood control instead of a permanent cure of the building: to manage the professional unit was commissioned to collate the hydrological analysis of information, estimate the impact of revetment where the largest segment, depending on when the time for phased-term planning to make a reasonable The hinterland retreat in downstream mode of governance, and in line with local foundation engineering construction, to the consolidation of pond shore slope. Pool on the left bank after the hinterland region, planning to flood control, parks, regulating water supply and tourism: for the use of green slope drainage floods, three major strategies of the regional planning for low-water (wetlands), hydrophilic (adjusted pool), the preservation of the lawn (the hinterland of the lawn ) geographic, etc., and into the rural environment and Castle Peak near Greenview goal as local features and demonstrate the spirit of the characterization of sites.
14
CHIANG, LIANG-YU, and 姜良育. "Finding Out The Current Status Via Videos After Fifty Years Since The Relocation Of Residents Of Shimen Reservoir Area." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/qbwe84.
Full textAbstract:
碩士國立臺南藝術大學
音像紀錄與影像維護研究所
104
This written report is based on a film of "A Better Tomorrow" for the graduation project, focusing on the topic of "finding out the current status via videos after fifty years since the relocation of residents of Shimen Reservoir area." By collecting and analyzing related information before and after the reservoir was built, the forced process of relocating residents of the reservoir catchment area implemented by the government, and videos of the current situation, the author aims to determine factors affecting strategies made by the government in planning important infrastructures, and opinions of the residents of the catchment area about the experience. This study also tries to find out how the public understand the reservoir and the previous residents of its catchment area. The drought in 2014 is said to be the most severe one in Taiwan in these sixty-eight years. Since that, being different from the past, the amount of rainfall of spring rain, plum rain and typhoons every year has been far less than the expectation, and the Northern Taiwan has been suffered the shortage of water. Shimen Reservoir's effective water storage has been decreasing below 220 meters. Because of the lowering of the water level, an old Tudigong temple the previous catchment area residents built was revealed to the public. The event is the starting point of this project, in which the author tries to track the background when Shimen Reservoir was building.
15
Ting, Lo Yu, and 羅鈺婷. "Explorative Study from the Observer-as-Participant on the Implication of Environmental Education of Shimen Reservoir Environmental Education Activities." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/91995492457819300718.
Full textAbstract:
碩士國立臺灣師範大學
環境教育研究所
102
The purpose of this study is from the viewpoint of environmental education, participation from the viewer's point of view, to explore the meaning of Shimen Reservoir environmental education activities. Object of study in order to "Shimen Reservoir Operations fiftieth anniversary special issue" content of "Shimen Reservoir Environmental Education Journey" as areas where environmental education activities described in the (not included meetings) conducted the course (1) Shimen Reservoir course trend analysis of environmental education activities (2) meaning analysis of environmental education activities Shimen Reservoir (3) the researchers observed in the course of participating in the learning process and participant roles. In this study, WHO-IDEA method as a tool to study the structure and clarify the contents and mixing with qualitative and quantitative methods for analysis. Researchers in September 2010 and December 2013, entered the study participant observation field. By (1) participant observation, actual participation data collection activities related meetings and participant observation records; (2) file analysis, the record of the meeting activities, audio-visual materials, manuals and other activities agenda pooled analysis. So that information through these two methods complement each other in the findings. And depth interviews to collect relevant information. The results of this study were (1) Shimen Reservoir environmental education activities due to different historical background, the study analyzed and summarized the content may be subject Shimen Reservoir environmental education activities management of the development process is divided into conservation, environmental education and environmental education base for the construction phase of development. (2) the meaning and purpose of environmental education activities Shimen Reservoir in conservation management focuses on disaster prevention and rescue period, the contents of the type of conservation activities aim primarily for the construction and engineering personnel feel residents of the catchment area, knowledge, attitudes; environment the purpose of education base for environmental education programs to foster the construction of the teachers' environmental education workshops seed main activities in order to learn the knowledge and skills to design considerations and the development of environmental education and curriculum design activities required stronghold of; environmental education development period of the environment the purpose of education is to function Shimen Reservoir and facilities for environmental education, providing the general public to apply for four hours of environmental education curriculum, enhance quality of care and the environment, the environment and water resources Shimen Reservoir on the awareness, knowledge, attitudes. (3) Participation in the course of the researchers from the simple observation of the promotion of environmental education Shimen Reservoir perception, knowledge, attitudes, to actually participate in audio-visual and conference records, event assistance, data aggregation, etc., to achieve the goal of environmental education and action of skills. Therefore, this study confirms Shimen Reservoir meaning the value of environmental education activities in each period of the background, providing North Water Resources Bureau View reviewing related activities on the promotion of environmental education Shimen Reservoir and handling, self-assessment and planning reference.
16
CHUNG, CHEN PING, and 陳平中. "A Study on land development of Specific Area Plan of Shimen Water Reservoir near Shixiu Bay Tour (2rd) First Overall Development Zone." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/51060460405270482706.
Full textAbstract:
碩士國立勤益科技大學
景觀設計系
102
Aboriginal reserves is a special form in Taiwan’s land administration, featuring in double policy implications of facilitating the administration of mountain regions and caring for aboriginal livelihoods. However, it is still a common phenomenon that the economy of mountain villages of aboriginal is still in recessionand the township peoplehave flowedintometropolitan area for a long time. The overall land development brings direct benefits on the regional economy and employment, while how to developbecomes a challenge on the premise of the special geographicalenvironment and lands rules ofaboriginal reserve. This study takes “Specific Area Plan of Shimen Water Reservoir near Shixiu Bay Tour (2rd) First Overall Development Zone” as base; it finds through field investigation that according to the provisions of aboriginal reserve development management approach, non-aboriginal can’t obtain aboriginal reserves, the mutual trust between landlords and private investors is weak and private investors can only purchase but cannot levy, there is a lack of indigenous capital, private investors cannot get public places agreement or consent when aboriginal reserve land is being developed. If these difficulties cannot be overcome, the overall land development will be difficult to achieve. “Joint development” is a substantial planning or land use plan for certain spaces. In order to make the limited land resources used most economically and effectively, different forms of development methods and the cooperation between government and private parties must be considered to make the joint development of publicand private lands possible. Therefore, the study presents two strategies under the theme of the overall development of aboriginal reserve: (1) to introduce joint development system; development agencies and land right holders stipulate Trust Deed of “land use rights” to obtain subrogation, and deliver benefits to beneficiaries according to the contract; (2) development agencies get the subrogation and seek foreign investors for development and management with the land use rights of a certain period, that is to develop and manage by the investment approach of “investors are irrespective of return buildings and land”. Consequently, government agencies have a way to help the economic development of aboriginal by overcoming these difficulties, and then the complex rights state of land right holders also need to change,= and can introduce developmentfunds. Joint development is feasible, but the law amendment is delayed for too long time which fails to meet urgent needs. Therefore, the study suggests establishing the law source for land right holders to trust development authority for the re-zoning and land development through adding amendment of “Key Points for Counseling Joint Cooperation Commission Management and Implementation on Aboriginal Reserve”, so as to develop aboriginal reserve land with the spirit of joint development. Related right holders can obtain the corresponding benefits, and it can also directly increase employment opportunities and create economic benefits for the nearby tribal. In the future, it’s hoped to provide another option and become an opportunity for the economic recovery of aboriginal reserve in addition to joint cooperation in agriculture and forestry in aboriginalreserves.
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Chen, Huan-Yuan, and 陳煥元. "Analysis of reservoir flood operation during rainstorms for Tsengwen and Shihmen reservoirs." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/qcnzve.
Full textAbstract:
碩士國立臺灣海洋大學
河海工程學系
102
The mean annual precipitation in Taiwan is about 2,500 mm. Nevertheless, the rainfall concentrates in the Mei-yu period and typhoon season which cause the difficulty of water resource management. In order to avoiding downstream channel flooding and storing floodwaters in the reservoir, reservoir operation during storm period is considered important. Due to recent progress of numerical weather prediction modeling, the Central Weather Bureau (CWB) and Taiwan Typhoon and Flood Research Institute (TTFRI) have developed the Taiwan Cooperative Precipitation Ensemble Forecast Experiment (TAPEX) which can forecast the typhoon incoming rainfall. If the rainfall forecast can combine with rainfall-runoff models to simulate reservoir inflow, a reservoir flood operation model would be promising to provide useful information to authorities for flow release during typhoon rainstorms. Based on the dynamic programming theory, a reservoir flood operation model was developed in this study, in which the reservoir upstream inflow in next 6 hours is assumed known. The objective function is set to mitigate downstream channel flooding and to reach maximum reservoir water level after the rainstorm. The developed model was applied to Tsengwen and Shihmen reservoirs of Taiwan. Historical rainstorms have been collected for analysis to demonstrate model’s capability for real-time reservoir operation. The reservoir flow-releasing hydrographs generated by the model were compared with the recorded hydrographs. The results show that the model can provide better flow-releasing hydrographs in considering downstream flood mitigation and water resource utilization. The model could be a useful tool to provide valuable information for authorities during typhoon rainstorms.
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YANG, YUAN-CHUN OU, and 歐陽元淳. "THE SOIL EROSION OF RESERVOIRS’ WATERSHED-A Case Study on the Shihmen Reservoir and Feitsui Reservoir, Taiwan." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/28115237355138922366.
Full textAbstract:
碩士國立臺灣大學
地理環境資源學研究所
91
Soil loss are geomorphic processes that have significant influences on the capacity of reservoirs. Comprehensive research data is required to effectively reduce the impacts brought about by such events. This research used empirical inventory data of landslide volumes for 1968, 1972, and 1976 as well as estimated data for 1986 and 1997, since there was no data available for these years. The data analysis determined the spatial distribution of landslide events and investigated differences in spatial distribution at 5 yearly intervals. Universal Soil Loss Equation (USLE) was used to estimate non-point resources of soil loss in watershed of Shihmen and Feitsui reservoir. Two methodologies were adopted for the estimation of landslides volumes; Method 1 calculated the depth of the landslide with reference to the gradient whereas Method 2 set 1m as a reference depth, and made measurements irrespective of the gradient of the slope. Method 1 overestimated the volumes on gentle slopes and underestimated the volume on steep slopes. Method 2 slightly underestimated the volumes on all gradients. The results from Method 2 indicated that landslides on slopes of between 40% and 60% produce the greatest volumes of material. Around 60% of the total volume of material produced comes from two upstream watersheds. The total amount of non-point soil loss in Shihmen reservoir watershed is 1324.5 thousand metric tons, while it is 443.3 thousand metric tons in Feitsui reservoir watershed. In Shihmen reservoir watershed, most non-point soil loss comes from landslides and fruit farms. In Feitsui reservoir watershed, most non-point soil loss comes from tea farms, fruit farms and forest. every year during 1986 to 1997 in Shihmen reservoir , there were around 471 thousand cubic meters of soil loss came from landslide, the volume accounted for approximately one-forth of average annual soil loss.
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Tseng, Yung-Chun, and 曾雍峻. "Shihmen reservoir sediment used for pavement." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/89631184007074510794.
Full textAbstract:
碩士明新科技大學
土木工程與環境資源管理研究所
100
The flow table test is used to determine the rheological characteristics of mortar specimens with various ratios of cement to sediment. The optimal ratio of cement:sediment:water is 1:x:x for 0.4≤x≤1. Compression test is used to verify the strength of mortar specimens. The result shows that the compression strength of mortar specimen is 86 kgf/cm2 after 28 days hardening for a cement mortar mixed with sediment with a ratio of 1 to 0.9. It verifies that the sediment can be used for concrete pavement for a minimum requirement of compression strength of 80 kgf/cm2. The compression strength of mortar specimen with a ratio of 1 to 0.5 after 28 days is 208 kgf/cm2, which can be used for large section of structures with reinforced concrete of strength over 176 kgf/cm2.
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Hsin, Li-Chung, and 李忠信. "Reservoir Operational Performance at FinancialViewpoint: A Case Study of Shihmen Reservoir." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/e5p5m3.
Full textAbstract:
碩士國立中央大學
土木工程學系碩士在職專班
94
Reservoir operation and management has been one of important civil affairs, and been conducted by public sectors for years. The Taiwan government that faces competition and organizational reform intends to adopt advantage of privatization; therefore, evaluating all profitable facilities to fit in the general pattern of privatization has been carried out. The purpose of this study is to establish operational performance indices in the financial viewpoint. The indices that examine operation performance, profitability and managing ability of a reservoir include profitability, capital structure, solvency, and managing ability. The findings conclude that low efficiency of making profits according to weak profitability; positive long-term perspective based on relatively good ratios of capital structure and solvency; and low efficiency of use of assets due to a low asset turnover rate. Keywords: reservoir, operational performance, financial ratios, privatization.
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TING, HSU HAU, and 許皓婷. "Research of Eutrophication for the Shihmen Reservoir." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/08406104754625700260.
Full textAbstract:
碩士中華大學
土木工程學系碩士班
94
The eutrophication of the Shihmen Reservoir was evaluated by using many indices. The relationship between Carlson Trophic State Index （CTSI）and algal indices（including algal cells, Shannon-Weaver, and DAIpo）was studied by using statistics. According to the study, the order of factors which affect the eutrophication of the Shinmen Reservoir are Secchi transparency, total phosphorous, Chlorophyll-a, water temperature, algal cells, coliform, and conductivity.
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Wan-LinWang and 王婉琳. "Sedimentation in the Shihmen Reservoir, northern Taiwan." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/18987224735283370436.
Full textAbstract:
碩士國立成功大學
地球科學系碩博士班
98
Turbidity current is one of the most important sediment gravity flows. The deposits of turbidity currents, commonly called turbidites, were described by Arnold H. Bouma in 1962. However, most researches have focused on submarine sediment gravity flow deposits rather than those formed in lakes. During and after some of the recent typhoon seasons, tremendous amount of turbid water had been generated in the Shihmen Reservoir, which might have been triggered by turbidity currents. Therefore the Shihmen Reservoir is an appropriate place for studying lacustrine turbidites. This research analyzes the spatial and temporal variations of sediments in the Shihmen Reservoir, in an attempt to unveil the possible causes of the turbid water. A 3.5kHz sub-bottom profiler was utilized to obtain the distribution of shallow (＜25 m) strata in the reservoir, in order to locate appropriate positions for core drilling. Fifteen cores with a total length of 435 m were then taken in the upper, middle and lower reaches in the Shihmen Reservoir. One-cm-thick slabs of sediments from the cores were photographed for X-radiographic images. The cored sediments were also measured for their size distribution by using Laser particle size analyzer. Three units are identified in the sub-bottom profiles in the Shihmen Reservoir. From the bottom up, Unit A is recognized at the depth of 40~50 m in the middle and lower reaches. There are many laterally continuous reflectors in unit A. The overlying Unit B is thinner (about 3~5 m) and has many reflectors on the upper reaches. However, in the middle and lower reaches of the reservoir, there are fewer and weak reflectors, and they are thicker (about 8~10 m). The overlying Unit C, with a thickness of about 5~6 m, can be found throughout the whole area. Laterally, 3 patterns of sub-bottom profiles can be identified. Pattern Type Ⅰ is irregular and protruding from the adjacent strata, and is located close to the shore. This pattern is interpreted as basement rocks. Pattern Type Ⅱ is v-shaped valley filled with many clear reflectors. This pattern is located in the central part of the reservoir and is interpreted to represent underwater valley and fill. Pattern Type Ⅲ is characterized by high relief, with more reflectors on the ridges and fewer reflectors in the basin. The sediments on the ridges are thicker than those in the basin. This pattern probably represents levee and channel deposits. Laser particle size analysis on 21 samples (from cores CGS-03 and CGS-04) shows that the mean grain size is between fine silt to medium silt. The distribution of the particle size is multimodal and the sorting is poor. Based on the reservoir level record taken between 1996 and 2007, three water interval periods are designated: Period a, b and c. It is suggested that sediments of the sub-bottom Units A, B and C were deposited during Period a, b and c respectively. Five lithofacies are identified from the 340 core X-radiographic images: FaciesⅠis high-density turbidite composed of mud clasts and fine sand; Facies Ⅱ is low-density turbidite consisting of sand, silt and mud; Facies Ⅲ is composed of mixed sand and silt; Facies Ⅳ is made of alternating thin silt and mud layers; Facies Ⅴ is mud layer. The amount of plant debris decreases downstream. Upstream from Ta Wan Ping (situated in the middle reach of the reservoir), plant debris are common (with the exception of SM-04, for the core is too close to the shore to receive much plant debris). Whereas downstream from Ta Wan Ping there are much less plant debris. But core CGS-04 is an exception, which is located close to a tributary, where more plant fragments are available. The degree of bioturbation in the upper reaches is more pervasive than that in the middle and lower reaches, possibly due to higher oxygen content in the upper reaches. High-density turbidites (HDT) are observed in five cores: SM-11, SM-10, SM-08, SM-07 and SM-06, which are all situated in the middle and upper reaches of the reservoir, and at least 10 HDT layers have been identified. Mud clasts found in the cores become smaller, rounder and thinner downstream. The above observations indicate that the source of turbidity currents is from upstream. Low-density turbidites (LDT) are found in four cores: SM-11, SM-08, SM-07 and SM-04, which are located mainly in the middle and lower sectors of the reservoir. There are 12 LDT layers in the cores. X-radiographic images and 3.5kHz sub-bottom profiles indicate that turbidity currents are common in the Shihmen Reservoir. High-density turbidites (HDT) with sands and mud clasts dominate the upper and middle reaches, while low-density turbidites (LDT), composed of fine sediments are found in the middle and lower reaches. It is possible that when turbidity currents moved downstream towards the Shihmen Dam, it reactivated and agitated the muds deposited previously, hence generated turbid waters during and after some of the typhoons. Thus, turbidity currents might be a major mechanism triggering the turbid water, and the reservoir bottom mud could be the main source of turbid water in the Shihmen Reservoir.
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Lou, Hsien-Huan, and 婁賢宦. "Shihmen Reservoir dredging project Countermeasures of improving." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/32162769548453710523.
Full textAbstract:
碩士國立臺灣海洋大學
河海工程學系
103
Shihmen Reservoir serves multiple functions, such as irrigation, power generation, public water supply, flood control and tourist attraction, making it an important water resource facility. It also plays an important role in economic development and industrial upgrading. Due to the steep slopes, fast-flowing streams, and large and concentrated annual rainfall in Taiwan as well as the result of the rapid mountain area development at the reservoir upstream, the reservoir storage capacity and function have declined gradually, and the domestic water use is in a situation beyond control. To strengthen the water storage and water supply functions of the reservoir, the dredging planning and management for the reservoir regeneration must be concerned. The current reservoir sediment management methods fail to take the sustainable use demand of the reservoir into account, and only control the sediment scouring to mitigate the incoming sediment quantity by the sediment volume estimation and the catchment area. Thus, many scouring control plans are not thoughtfully planned and implemented as expected, thus unable to achieve the expected result of reducing the sediment yield in the catchment area. The service life of Shihmen Reservoir has been reduced from the originally designed 90 years to 54 years, that is to say, the reservoir would come to an early end of its life in 2018. The service life of the reservoir may be extended by about 4 years by short-term mechanical dredging project (6 years for a phase) with the benefit-cost ratio of about 2.48. In addition, the catchment area governance and mechanical dredging, hydraulic sediment drainage and direct discharge of the raw water of a higher concentration into the downstream river channel by utilizing the typhoon and heavy rain period are all methods that could be used to reduce the reservoir sedimentation and maintain the equilibrium between scouring and deposition of the downstream river channel. The mechanism of reservoir sediment management is to transform the reservoir sedimentation issue into the concept of sustainable use. The key is to transform the concept of the reservoir life restricted by sedimentation into the water transfer, sediment transfer and being able to maintain the reservoir operation function. The basic sediment control strategies needing to be adopted for the sustainable use of the reservoir are described respectively as follows: 1.Downstream section of reservoir (by the dam): the dredging operation in this section is conducted by hydraulic sediment pumping. In the current construction situation of the sediment dredging part, the annual removal volume could reach about 300,000 cubic meters. Part of the incoming sediment can be made to pass over the reservoir area through the steel sediment drainage pipes and the sediment drainage tunnels, such as the high-concentration drawdown sediment drainage in the flood period, off-channel reservoir, sediment drainage by bypassing the reservoir, density current sedimentation prevention operation and other technologies. 2.Midstream section of reservoir (by Amuping): the dredging operation in this section is conducted by way of the hydraulic sediment pumping in principle. The annual dredging volume is expected to be 150,000 cubic meters; and the mechanical dredging and transfer is conducted in the drought period of the reservoir with the daily dredging volume amounting to about 1000 cubic meters. 3.Upstream section of reservoir (by Fuxing Bridge): in reducing the incoming sediment, the technologies like the slope scouring control in the catchment area and the upstream-channel sediment captivity are adopted to reduce the entry of sediment into the reservoir; and the large-size sediment storage dams (three dams in Yixing, Baling and Ronghua) are constructed. When the sediment storage capacity able to be provided by the tributaries at the reservoir upstream exceeds the upstream sediment supply volume, the reservoir benefit could be regarded as sustainable. Therefore, the sediment storage space needed may include the reservoir’s capacity reserved for sedimentation or one or several upstream sediment storage spaces. The annual removal volume of the dredging operation in this section is expected to be 150,000 cubic meters. There are many reservoir sedimentation reduction methods, as mentioned above; however, they fail to consider how to reduce the sedimentation at the reservoir outlet. In light of this, the sedimentation problem is suggested to e handled by steel sediment drainage pipe and sediment drainage tunnel in the middle and lower reaches of Shihmen Reservoir, thus reducing the sedimentation at the reservoir outlet and increasing the reservoir’s effective water storage capacity.
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Chen, Yi-Ta, and 陳奕達. "Flood routing for Shihmen reservoir using Matlab." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/73146358479135901963.
Full textAbstract:
碩士淡江大學
水資源及環境工程學系碩士班
96
This study aims to flood period,The reservoir turns on water and can''t make the water level of the downstream river led Gao. If can match with downstream of the best turn on water opportune moment, can effectively of help downstream slow excessive water measure and can also make the security of the reservoir essence.This syudy is to make use of Muskingum and Puls to build up the system of the Calculate flood of reservoir and river avoid soaring of downstream river water.This study is with Shihmen reservoir for object and make use of Matlab software program to help to solve.
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許皓婷. "Research of Eutrophication for the Shihmen Reservoir." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/38807660079602764389.
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Huang, Chun-Chieh, and 黃俊傑. "A Study on the Optimum Reservoir Operation during Floods — for Shihmen Reservoir." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/41650221329318832241.
Full textAbstract:
碩士中原大學
土木工程研究所
92
II Abstract Although the mean annual precipitation in Taiwan is 2.5 times the average value in the world, there is a shortage of mean precipitation per person per year due to intensive population. The precipitation is unsteady in different places and during different seasons, and it usually concentrates during May to October, the moist season, due to the typhoon that brings in juicy rain. Therefore, it is important to get the best reservoir drainage to keep it safe. Reducing higher water-level in downstream due to drainage of reservoir, and making reservoir to achieve the full level as soon as possible after typhoon is over can solve the shortage of water resource in Taiwan. We took Shihmen Reservoir, its watershed and Hsin-hai bridge in downstream as examples; and the data of invading typhoon in 1997 to 2001 are used in this paper. At first, the Artificial Neural Network (ANN) is used to simulate the rainfall-runoff model and to predict the inflows of 6 hours later in Shihmen Reservoir. Secondly, we focus on Hsin-hai Bridge in Ta-han Stream Basin. The ANN is applied to analyze the water stage increment of the river due to Shihmen Reservoir drainage. In the last phase, Genetic Algorithm (GA) is used to select the best drainage of reservoir during the period of flood and to achieve the optimum reservoir operation. It is expected that results of this study could be used for online reservoir operation in the future. For the optimum reservoir operation model, this study attempts to divide the process of typhoon into three phases which includes beginning, middle and ending by two time points A and B. The safety line of reservoir is utilized to limit the water-level. The results show that the safety line of reservoir at time points A=18, B=24 and A=24, B=48 corresponded to 48-hour and over 48-hour typhoons respectively are satisfactory. Keywords: Artificial Neural Network (ANN), Genetic Algorithm (GA), optimum reservoir operation, rainfall-runoff model
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Lin, Chih-Hung, and 林致弘. "Uncertainty analysis of reservoir inflow estimation-A case study in Shihmen reservoir." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ced5ak.
Full textAbstract:
碩士國立臺灣大學
生物環境系統工程學研究所
107
Due to the limitation of topography and climatic conditions, Taiwan has uneven spatial distribution during rainfall. In Taiwan, only about 20% of water can be used by people, so the distribution of water resources has become an important issue for the government. Due to the shortage of water resources, the reservoir is the most important water conservancy facility in Taiwan. If it can provide the simulated value of the future reservoir inflow, then the regulation of water resources will be of great help. Therefore, it is necessary to establish a reservoir inflow estimation model based on rainfall runoff model. Since the process of hydrological simulation is full of uncertainties, it is imperative to discuss reservoir inflows in a stochastic architecture. The research area of this paper is Shimen Reservoir, which is an important reservoir in northern Taiwan. It mainly provides agricultural water, public water, power generation and flood control, and is a multifunctional reservoir. From November of each year to May of the next year, it is the dry season of Taiwan, while the cultivation period of the first phase of rice cultivation is from January to July of each year. Due to the overlapping of the two times, the water situation in the first half of the year is often tight, so this study will target the dry season. The reservoir inflow is explored. In this study, the SWAT model (Soil and Water Assessment Tool) was used to estimate the inflow of Shimen Reservoir; the meteorological reproduction model was used to generate a single point of rainfall, and the Copula function was used to construct the multivariate distribution of the upstream rainfall station of Shimen Reservoir to simulate the upstream Rainfall distribution in the catchment area. The combination of the two can provide an uncertainty interval for reservoir inflow. Under this uncertainty structure, the reservoir inflow can be expressed as a probability density function. The probability density function of the inflow can provide a basis for government agencies to make decisions and prepare for the possible floods and droughts in the future. It is expected that this study will help Taiwan''s future water resources regulation.
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Jhan, Yuan-Kuei, and 詹原魁. "Analysis of Soil Erosion of Shihmen Reservoir Watershed." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/gfqe25.
Full textAbstract:
碩士國立臺北科技大學
土木與防災研究所
102
Reservoirs not only built to retain water also for distribution during dry seasons. One of the most important influence the design life of reservoirs is the annual sediment input to reservoirs. The study area located in Shihmen reservoir, Taiwan. It is a important reservoir for distributing water in central Taiwan. To understand the amount of soil erosion of watershed, firstly we use Arc GIS graphic model to build USLE as the analysis tools, secondly we use one of the most important formula called Universal Soil Loss Equation, USLE as the caculating formula. There are six factors of USLE, namely the rainfall factor Rm, the soil erodibility factor Km, the topographic factors including the slope length factor L and slope degree factor S, the crop management factor C, and the erosion control practice factor P. Because of Arc GIS graphic model has its convenient, so we can analyze different years of sources to get the amount of soil loss of each year. Instead of using USLE formula, we also combine with GIS tools. Use GIS tools to build model, analyzing each factor of USLE. The result can be seen as judge the life of the reservoir.
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Wang, Jiaming, and 王家銘. "Hydrological Trends in the Shihmen Reservoir Catchment Area." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/81621933313953587773.
Full textAbstract:
碩士中華科技大學
土木防災工程研究所
99
In recent years the research on trend detection method based on hydrological time series has been gradually drawing attentions due to global warming effect. Based on their outstanding test capability, the nonparametric test methods such as Mann-Kendall (MK), Seasonal Kendall (SK), and Regional Kendall (RK) test methods have been playing important roles for the trend analysis by hydrological time series. Kendal series test method is a kind of rank-based distribution-free monotonic trend analysis method which only requires the statistical independence of serial data. Based on the data from discharge stations in the upstream of Shihmen Reservoir catchment area such as Hsiayun, Kao’i, Lengchiao, Yufeng, and Hsiuluan (from 1961~2011, respectively), in this paper we implement both the test on serial correlation of significance of observed discharge by adopting 5% significance level (α=5％), and the trend detection and inference. There are usually certain serial correlations among the observation data of hydrological time series. In this paper we use the lag 1 serial correlation coefficient to determine the correlation of significance of discharge observation data, and we use MK-PW and MK-TFPW methods for trend tests after removing serial correlations with PW (pre-whitening procedure) and TFPW (Trend-Free Pre-Whitening) respectively. With respect to the discharge observation data affected by natural seasonality, in this paper we use the SK trend test method introduced by Hirsch et al (1982) to implement the judgment of significant trend based on consideration of seasonal factor. As for the area trend judgment of Shihmen Reservoir catchment area, the RK trend test method proposed by Helsel et al (2006) has been adopted for the test on consistency of trend directions among all test stations within this area. The MK (or MK-PW and MK-TFPW) trend analysis results of annual runoff, annual mean daily discharge, annual maximum daily discharge, and annual minimum daily discharge have indicated that except for the downward trend of minimum daily average discharge at Hsiayun station, the discharge series of all other test stations in Shihmen Reservoir catchment area have not shown any significant trend during statistical period. The result of SK test has indicated that there has not been any significant trend during statistical period among the monthly average discharges of all test stations in Shihmen Reservoir catchment area. The tests results of monthly average discharges of high flow period (May to October), low flow period (November to April), and the average of both have indicated that that except for the downward trend of minimum daily average discharge at Hsiayun station, all the other discharge series have not shown any significant trend during statistical period. As for the RK test results of area trends in Shihmen Reservoir catchment area, consistent upward trends have been shown among annual runoff, annual mean daily discharge, monthly average discharge accumulated in low flow period, and monthly average discharges of every past March, April, May, August, and December in all test stations. Meanwhile, downward trends have been shown in the monthly average discharges of every past January and November. However, these results only represent the consistent outcome of discharge trends among all stations within this area without the consideration of spatial correlation among these stations. Overall speaking, there has not been any significant trend in the annual runoff of Hsiayun station of Shihmen Reservoir catchment area during the period of analysis; however, the results of significant downward trend of annual minimum daily discharge and the significant upward trend of monthly average discharge in high flow period have verified the inference of growing disparity between high flow and low flow in Shihmen Reservoir catchment area.
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游山峰. "A Study for Shihmen Reservoir Operation Rule Curves." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/68247661211127829924.
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Chen, Bor-Haur, and 陳伯豪. "Risk Analysis for Shihmen Reservoir Water Supply System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/68943671911692152830.
Full textAbstract:
碩士國立中央大學
土木工程研究所
99
The water supply of Taoyuan County mainly comes from Shihmen Reservoir. Severe droughts were witnessed in 2002~2004. Typhoon Aere, striking northern Taiwan in 2004, caused high turbidity of inflow into the reservoir, and forced water purification plants to shut down. This resulted in suspension of the water supply in Taoyuan for over 2 weeks. In order to solve the water deficit dilemma, Water Resources Agency formulated project “Implementation Plan of Shihmen Reservoir and Its Catchment Management Project”. This study utilized System Dynamics software“VENSIM”to build dynamics models for Shihmen Reservoir water supply system, which includes Multi-layer intake and Zhongzhung water storage pool. This study investigates Reliability, SI (Shortage Index) and DPD (Deficit Percent Day Index) of different water purification plants (Lungtan, Pingzhen, Shihmen, Danan and Banxin) associating with different water supply regions (north Taoyuan, south Taoyuan, and Shihmen reservoir water supply system). According to the results, the Reliability and SI in Banxin water purification plant is the worst. On the other hand, north Taoyuan’s Danan water purification plant is the best. The DPD of each water shortage event in Shihmen Reservoir water supply system was lower than the tolerance level of water shortage, defined as DPD being 1500 %-day, with the average 87.76 %-day. After adding Multi-layer intake and Zhongzhung water storage pool on the system, the water deficient days reduced by 19% while water deficit reduced by 24%.
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鄭長生. "Cultivation of vegetables in silt from Shihmen reservoir." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93972421564347051978.
Full textAbstract:
碩士明新科技大學
土木工程與環境資源管理研究所
100
Due to rapid development of industry in Taiwan, the demand of water supply is continually increasing. There are many reservoirs in Taiwan to supply water. Many of reservoirs in Taiwan have a large amount of silts due to land exploitation of catchment. Particularly the Shihmen reservoir in northern Taiwan contained 9.5 million cubic meter of silt which is about 30% of its volume in 2007. The silt contents increase every year due to heavy rains in the typhoon period. Thus the silt must be pump out from the reservoir to extend its life span. The treatment of silt induces environmental problems. This study is to use the Shihmen reservoir silt to raise Chinese chives and Scallion in order to solve the problem of silt treatment and increase economic benefits of silts. The test samples are silt, mixtures of silt and rice husk with ratios of 9 to 1 and 3 to 2, mixtures of silt and wood trash with ratios of 9 to 1 and 3 to 2, respectively. Chinese chives and Scallion grew to harvest length of 15cm in 5 weeks by experiment. The growth rate of Chinese chives and Scallion cultivated in the silt is as well as in the culture soil.
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Hsieh, Kuo-Cheng, and 謝國正. "The Processing and Elimination of Reservoir sludge – A Case Study on Shihmen Reservoir." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/pukw43.
Full textAbstract:
博士國立臺北科技大學
工程科技研究所
101
The deposition of reservoir sediment is more than 14.6 million cubic meters per year in Taiwan. Reservoir sediment is itself mineral. After processing the reservoir sludge, it can be used as alternative material to apply in many industries. This is also meeting the diverse supply policy of government and recover reservoir capacity and extend life of reservoir. Some sludge taken from Shihmen Reservoir were tested in this study. The analysis, with the dynamic light scattering(DLS) instrument, showed that the sludge particle size is 834nm ~ 1547nm and particle surface charge distribution is -15 ~ -20mV, these tests display the sludge is a very tiny partical and with ion adsorption properties. This study also made a super-absorbent polymer (SAP) and mixed with 100g sludge (water content 70%), when adding about 3.5g of super-absorbent polymer, it is formed dry soil in a very short time, and it will be enable follow-up treatment. Another consultation with industry experts, academics, government officials, confirm Shimen Reservoir sludge recycling pathway is quite diverse, the key factors of elimination of reservoir sludge are as follows: a steady supply of sludge sources； government offers incentives to award；the sludge products are specified as public engineering materials；to encourage the private project of dredging and processing to apply；to integrate all of the management of governmen。
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chen, shih-wei, and 陳世偉. "GA=based automation model for parallel operation on Shihmen Reservoir and Feitsui Reservoir system." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/61094912729605844239.
Full textAbstract:
碩士國立中央大學
營建管理研究所
90
The purpose of this paper is to overcome computationally intractableness due to the curse of dimensionality for multiple reservoir operation problems in real world. GA-based automation model, which embeds Genetic Algorithm (GA) in simulation model, is chosen to discuss different coding and weight of fitness function by sensitivity analyses. Finally, 2500 years streamflow data, which is calculated by multisite streamflow generation model, is taken into GA-based automation model to get 50 sets of reservoir rule curves. All of the rule curves are stacked up to get the banded range. According to the banded range, the importance of rule curves in some time period is judged. The study attains the following findings and conclusion: 1. When reservoir rule curves use 6 turning points, which reduces design variables from 10 to 7, the resulting optimal rule curves performs very close to those from other different coding. The difference of average shortage and the difference of the hydropower resulting from reducing design variables from 10 to 7 are only 0.63% and 0.27%, respectively. It is demonstrated that the simplified coding can reflect the feature of reservoir. 2. The objective function (i.e., Fitness = W1‧1/SI + W2‧Power + W3‧(1-R), where W1=1000,W2=1,W3=1000, SI=shortage index, Power=hydropower, R=percentage of maximum shortage ratio), derives a proper rule curves which can not only reduce the shortage amount and the duration for downstream demand but also enhance hydropower efficiency. 3. Under uncertain of future streamflow, the medium rule curves, which is obtained from rule curves resulting from 50 sets of generate streamflow data, attain better benefits in the duration of the analytic years. 4. It is found that comparing the present rule curves with medium rule curves, the present rule curves and the medium rule curves of Shihmen reservoir are close, but that of Feitsui reservoir are not. The reason is that these two reservoirs were planned for single-operation system in the initial stage. Therefore, in practice the side demand of Shihmen is relatively large that prohibits Shihmen reservoir to play an important role in the joint operation. The joint demand is almost solely supplied with Feitsui reservoir.
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Chen, Yi-Cheng, and 陳奕丞. "Dispersal of Limnoperna fortunei in Shihmen Reservoir drainage basin." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/38sfb4.
Full textAbstract:
碩士國立彰化師範大學
生物學系
102
Golden mussel Limnoperna fortunei (Dunker 1856) is an invasive freshwater mussel that has similar biological characteristics, life history and planktonic larval stage with the zebra mussel Dreissena polymorpha in Europe and North America. Previous studies suggested that the dispersal of zebra mussel in accordance with "source and sink dynamic model". The distribution of golden mussel in Shimen Reservoir drainage basin was investigation in order to understand whether the dispersal of golden mussel matches the "source and sink dynamic model". The experiment of hydrodynamic force was examined for testing the factors that affect the planktonic larval mortality of golden mussel. The results present that golden mussels are distributed along the Dahan River downstream about 6.4km, Taoyuan Irrigation Ditch(with highest population density) about 41.5km, Shihmen Irrigation Ditch density about 11km, and their population density are decreased with distance from the Shimen Reservoir. There are no significant difference with planktonic larval mortality between two container size(diameters)(p=0.073，F=12.158), but a significant difference among high, slow and controlled flow speed(71.17%,24.73%,5.48; p=0.008, F=122.273) in hydrodynamic force study. Therefore, the distribution pattern of golden mussel in Shimen Reservoir downstream river fits the "Source and sink dynamic model". The mussel population in artificial drainage system has higher density and spreading farther than in natural Dahan River downstream. It is suggested that the dispersal of golden mussel are influenced by flow speed (hydrodynamic force), vegetation density and sediment quality.
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Chen, Wei-Chih, and 陳韋志. "Study on the Vegetation Ecology in Shihmen Reservoir Watershed." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/59749721603747350792.
Full textAbstract:
碩士國立中興大學
森林學系所
95
Shihmen Reservoir watershed is the biggest one of Taiwan and the total area is ca. 763.4 km2. It covers part of Chatienshan Nature Reserve, Chilan Major Wildlife Habitats and Shei-Pa National Park. The watershed ranges from 225 m to 3,514 m at altitude. It is in subtropics to cold-temperate. After integrating the plot-data from different survey cases in this area, it was set altogether 189 plots. The Ptph-Q is 6.51, more than it in whole Taiwan area (3.97). It suggested that our research area is more humid. The altitude was revealed as the major factor affected the vegetation. According to the investigating result, there were 144 families, 442 genera, 954 species of vascular plants recorded in this study area. The vegetation classification was estimated by Matrix Cluster Analysis (MCA). 22 forest types and 2 herb association were sorted: 1. Chamaecyparis formosensis type; 2. Calocedrus macrolepis var. formosana type; 3. Pinus taiwanensis type; 4. Pseudotsuga wilsoniana type; 5. Cyclobalanopsis sessilifolia type; 6-1. Cyclobalanopsis longinux subtype; 6-2. Cyclobalanopsis longinux－Fagus hayatae subtype; 7. Castanopsis cuspidata var. carlesii type; 8. Schima superba type; 9. Litsea acuminata type; 10. Machilus japonica type; 11. Turpinia formosana type; 12. Acacia confusa type; 13. Abies kawakamii type; 14. Tsuga chinensis var. formosana type; 15. Cyclobalanopsis morii type; 16. Chamaecyperis obtusa var. formosana type; 17. Mallotus paniculatus type; 18. Pinus morrisonicola type; 19. Pasania hancei var. ternaticupula－Machilus zuihoensis type; 20. Zelkova serrata type; 21. Juglans cathayensis type; 22. Styrax formosana type; 1. Yushania niitakayamensis association; 2. Miscanthus transmorrisonensis association. The eveness index of most vegetation in the area was above 0.7. There were plentiful plant species. The vegetation was in the later stage in succession. And the higher altitude, the less divergence. Moreover, the study investigated the distribution of rare plants and their habit environment for evaluating the threats they might suffer.
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Wu, Jian-Tai, and 吳建泰. "Drought index based optimal hedging rules for Shihmen reservoir." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/73979757351364387725.
Full textAbstract:
碩士淡江大學
水資源及環境工程學系
92
Droughts are inevitable phenomena of the climate on earth. Initiation and termination of droughts are unpredictable, water supplies from reservoirs are unstable during droughts. It is often to accept a series of smaller shortages to mitigate the negative impacts caused by a sudden high percentage shortage. It is aimed to derive the optimal hedging rules for a water supply reservoir in this study. Water rationing mechanism depends on drought indicators. Two types of hedging are considered in this study. The first type of hedging uses drought indicators solely, namely, initiation, termination of hedging and amount of water rationing are determined by the drought indicators. The second type of hedging employs the storage and drought indicators to determine hedging or not. When water stored in reservoir sufficient to meet the established demand, no hedging is initiated even though the drought indicators indicating an impending drought. The standardized precipitation index, developed by McKee et al. (1993), is used in this study as an indicator to determine hedging or not. Various time-scale SPIs are used to monitor the drought condition. When SPI below a specific threshold, water rationing is initiated. Reservoir performance is evaluated by shortage characteristics. Two shortage indices, shortage ratio and maximum one-month shortage ratio, are considered in this study. Multi-objective compromise programming is employed to derive the optimal hedging rules for minimizing these two conflicting objectives simultaneously. Simplified Shihmen reservoir system is used as an example to illustrate the proposed methodology. The results indicate that the optimal first type of hedging uses 3-month time scale to calculate SPI, the starting hedging SPI of 1.0, and the maximum hedging amount of 60%, which resulting in shortage ratio of 12.62% and the maximum one-month shortage ratio of 48.06%. The optimal second type of hedging uses 173.15 million m3 and SPI of 3.0 as the hedging thresholds, and the maximum hedging amount of 50%, which resulting in shortage ratio of 11.29% and the maximum one-month shortage ratio of 47.38%.
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HSU, Hsiao-ching, and 徐笑情. "Ecological and Environmental Evaluation on Upstream Watershed of Shihmen Reservoir." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/21866053353992638240.
Full textAbstract:
碩士中華大學
土木與工程資訊學系(所)
94
AbstractShihmen Reservoir is one of the main water resources in northern Taiwan. Due to the water quality of headstream watershed, the reservoirs in Taiwan are tending to eutrophication. Meanwhile, the quality and ecology of water are inseparable, water quality may represent the ecological condition. This disquisition will evaluate the ecology of Shihmen Reservoir according to the biotic and environmental viewpoints. The study period started from 2003 winter to 2004 autumn that contain eight seasons. The investigations were carried out at eight sampling sites in Shihmen Reservoir headstream watershed including analyses of physical/chemical properties, and structures of fish community, aquatic insects and algae. In this paper, the River Pollution Index (RPI), Index of Biotic Integrity (IBI), Family-level Biotic Index (FBI), III Rapid Bioassessment Protocol (RBP III) , Generic Index (GI), Saprobity Index (SI), and Qualitative Habitat Evaluation Index (QHEI) were used to evaluate the ecological and environmental grade for the headstream watershed of Shihmen Reservoir. The study results indicate that：The water condition and estimation of biological index at eight sampling stations in eight seasons represent the season variation. The results of Index of Biotic Integrity (IBI), Family-level Biotic Index (FBI), Rapid Bioassessment Protocol (RBP III), Generic Index (GI), Saprobity Index (SI) and Qualitative Habitat Evaluation Index (QHEI) significantly relate to River Pollution Index and part of physical/chemical elements. The water quality evaluation reveals good consistence. In Shihmen Reservoir’s watershed, the aquatic insects represent the water quality more objective than algae and fish, so aquatic insects can be more appropriate used as the indicators. Using ecotype indicators in synthetical analysis can objectively represent the quality of water and eco-environment better. The Family-level Biotic Index (FBl) and Rapid Bioassessment Protocol (RBP) of aquatic insects are more sensitive to the variation of environment followed by the SI for algae, RPI index and IBI for fish community.
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魏經權. "Water quality impact by typhoon in watershed of Shihmen reservoir." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/73827874956449493797.
Full textAbstract:
碩士中華大學
景觀建築學系(所)
96
The Shihmen reservoir, which is one of the most important reservoirs in northern Taiwan, has multiple functions of irrigation, hydroelectricity, public water supply, flood control and tourism. The water quality of watershed has been seriously impaired since the serial strong typhoons attacked Taiwan in 2004. The purpose of the study is to investigate the main factors variances of water quality in watershed by analyzing the water quality data ( DO, BOD5, SS, NH3-N, TP, NO3-N, Water temperature, pH, COD, NO2-N, EC, TN ) collected from 10 sampling stations within Watershed. The factor analysis was applied to study the variances and spatial differences of water quality impacted by the typhoon events. The results of factor analysis indicated that nitrogen, organic and suspended solids were the main factors which were most seriously impacted by the typhoons of 2004; suspended solids and nitrogen were the main factors which were most seriously impacted by the typhoons of 2005. The water quality in the areas of Sun-Ming, Nan-Ze-Go and Chao-Zou-Pin, was most greatly impacted by the typhoons of 2004. The water quality in the areas of Sai-Su-Ler, Zon-Hua-Ba and Siu-Zaun was most greatly impacted by the typhoons of 2005.
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Hsu, Chao-Pin, and 徐肇斌. "Analysis of the Reason for Landslides in Shihmen Reservoir Watershed." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/11535544825129516570.
Full textAbstract:
碩士國立臺灣大學
生物環境系統工程學研究所
94
When the typhoon Aere and Matsa passed through the north of Taiwan in 2004 and 2005, the extremely rainfall cause the huge landslides and debris-flow disasters in the Shihmen reservoir watershed. A large number of sand cause the reservoir to deposited and because the water muddied, there is no water to use for ten more days in Taoyuan. In order to understand the reason of the landslide, we compare with the landslide data included the years of 1986, 1998, 2003, 2004, 2005 and the factors of geology, slope, direction of the slope, land-used, river, road, village, rainfall in relationship. The reason of landslide in the Shihmen reservoir watershed was because of the geology condition and cumulative precipitation.
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FANG, JUN-JIE, and 方俊杰. "Study on Rainfall-Runoff Model for Watershed of Shihmen Reservoir." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/87384033375499000876.
Full textAbstract:
碩士國立臺灣大學
農業工程學系
85
The main purpose of this study is to analyze three rainfall-runoff models, unit hydrograph method, linear reservoir model and storage function method, that are suitable for watershed of Shihmen reservoir. The datas of typhoon in 1985-1996, are applied to estimate of three rainfall-runoff models. The result of unit hydrograph method show that calculated value is greater than observed value, and the coefficient of efficiency (CE) is among 0.22-0.81. The result of linear reservoir model show that calculated value is greater than observed value in both of the rising and regressing segment, and the coefficient of efficiency (CE) is among 0.46-0.85. The result of storage function method show that calculated value is closed to observed value, and the coefficient of efficiency (CE) is among 0.87-0.98. The analytical approaches adopted in this study are excepted to be used as important references to Shihmen reservoir administration, in the planning and the design of water resources utilization, watershed management and flood forecast in watershed of Shihmen reservoir.
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Hsu, Jong-Pao, and 徐忠寶. "The derivation and evaluation of operating rule for Shihmen reservoir." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/74795024798436737330.
Full textAbstract:
碩士國立臺灣大學
農業工程學系
84
The yield of a reservoir is greatly affected by the operating rule used.An improper operating rule may cause waste of water resource and lead to a water supply shortage at downstream area. To derive an efficient operating rule becomes an important issue. Most of the reservoirs in Taiwan are operated according to a set of ruling curves.This method of ruling curves is simple but rigid .It is not flexible to response to the change of input and output of the water system such as incoming stream flow or the down- stream water demand.Some studies have been done for major reser- voirs to modify the current ruling curves for better yield.But the characteristics of rigidness is still hanging there.The objective of this study is derive new operating rules for better operation of the reservoir. An optimization model was built for the target reservoir.The historical records of inflow and release were input and optimum operation for each year were obtained.The optimal operations was then related to selected predicting variable through statistical analysis and operating rules derived.These rules were then fed into a simulation model for evaluations.Stochastic dominance was used to evaluated the derived rules and current ruling curve.The results reveal that derived rule of this study is better than the current and previous proposed modified ruling curves in terms of frequency and scale of shortage.
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Wang, Ching-Ming, and 王旌名. "Establishment and Comparison on Flood Operation Rules of Shihmen Reservoir." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/59824679914463669494.
Full textAbstract:
碩士國立臺灣海洋大學
河海工程學系
103
In Taiwan, typhoon is the main reason that results in flooding in summer. General rules of flood control are governed such as the Enforcement Rules for Water Act, The Operational Regulations, and other regulations of reservoir administration, etc. Nevertheless, to release the right quantity in the right time depends upon decision makers and their experiences. The Shihmen reservoir is the case study in this thesis. Details of flood control facilities and 56 typhoons’ historical data during flood operation are gathered. This rule is based on the current situation of inflow and water level. According to the information entropy theory, different inflow and water level will be converted into flood release index. Then, releases would be decided as a function of release indexes that correspond to current water surface elevation and inflow rate. To optimize the releases during flood operation, we consider that flood peak reduction, downstream safety and water level while flood ending are the main objectives, and, genetic algorithm is adopted. Moreover, the possible stages of flood operation are taking into account as well. This flood operation model would help decision makers to determine the current release and to reduce the risk of flooding. To compare with the flood operation in practice and previous research (Hsieh 2010), seven typhoons that including different intensity are adopted. Results show that the release hydrographs of the flood operation in this research are similar to the practical operation, besides, the accomplishments for flood peak reduction and the ending water level in this research are better than the practices. It would be a good tool for decision makers.
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Han, Wan-rong, and 韓宛容. "Apply Statistical-Downscaling Climate Forecasts for Estimating Shihmen Reservoir Inflows." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/66191775238781910522.
Full textAbstract:
碩士國立中央大學
水文與海洋科學研究所
100
Resources in Taiwan not only are impotant for water resources management, but also paly as retention measures against flooding. In recent years, the need for domestic and industrial water have increased rapidly because of economic vigorous development, which result in rising stress of water supply especially in drought periods. Therefore, if reservoir inflows can be quantitatively forecasted beforehand, it will be helpful for issuing drought wqrning and making properly decision for water allocations. The Central Weather Bureau (CWB) issued short-term climate forecasts by statistical downscaling for precipitation and temperature with lead time of 5 months in a 1-month moving window. The objective of this study is to apply the short-term climate forecasts by integrating with a weather generator and a watershed hydrological model to predict inflows of the Shihmen Reservoir with the maximum lead time of 5 months. Both probabilistic flow forecasts and deterministic flow forecasts were produced in this approach, as well as the associated potential economic values of two flow forecasts. The sampling techniques, including maximum probability, weighted probability, and bias correction probability, were applied to retrieve monthoy mean values of precipitation and temperature from the climate forecast. Then a weather generator was applied to generate daily temperature and precipitation to drive a hydrological model for inflow predictions of the Shimen Reservoir. The skill scores (RPSS, LEPS and MSE) of three sampling results were all greater than climatology skill. The maximum probability approach has the highest predictive ability. Results of both probabilistic flow forecasts and deterministic flow forecasts are also greater than climatology skill, and show certain economic values from June to October. From January to May, the deterministic flow forecasts possess greater economic benefits than that of the probabilistic flow forecasts for cases of observed inflows at blow normal outlooks; while, the probabilistic flow forecasts possess greater economic benefits that than of the deterministic flow forecasts for cases of observed inflows at above normal outlooks.
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Li, Dong-Huang, and 李東皇. "Analyzing soil erosion of Shihmen reservoir watershed using slope units." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5wy9mp.
Full textAbstract:
碩士國立臺北科技大學
土木工程系土木與防災碩士班
105
Universal Soil Loss Equation (USLE) is one of the most commonly used estimation methods for surface soil erosion. There are six factors of USLE: Rm, Km, L, S, C, and P. Previously, most studies used grid cells to estimate the amount of soil erosion. However, the grid size was fixed and did not fit the actual terrain. Therefore, the method was prone to extreme and erroneous values. In order to overcome this problem, this study used slope units to estimate the amount of soil erosion in the Shihmen reservoir watershed, thereby improving outcome success of erosion estimation. In addition, this study also used recent rainfall data to update the Rm factor, which has a very strong effect on soil erosion. The results showed that the annual average soil erosion estimated by slope units in the Shihmen reservoir watershed was 86.1 tonnes/ha/year. The corresponding erosion depth was 6.15 mm, which was very close to the average depth of 6.54 mm from the measurements of erosion pins. This study also showed that the estimated amounts of soil erosion between the two mapping units were similar, with the grid cell method about 10% higher than the slope unit method. Finally, the Rm factor was updated in this study, and the results showed a better fit with the actual amount of soil erosion. This demonstrated the importance of updating the Rm factor.
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HUANG, CHENG-WEI, and 黃晟瑋. "Study on Hydrological Trend after Dam Construction in Shihmen Reservoir." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/84q73k.
Full textAbstract:
碩士中華科技大學
土木防災工程研究所在職專班
107
The effect of global warming has led to impact on hydrological environment, thus resulting in the structural change of hydrological cycle. The focus of this paper is the variation of hydrological characteristics and hydrological trend in the catchment area after dam construction of reservoir. In this paper Mann-Kendall (MK) trend test is used for the trend analysis of observed discharge and rainfall based on the data of Xia-Yun, Kao-Yi, Leng-Chiad, Yu-Feng, and Xiu-Luan Discharge Measuring Stations (1965〜2002 and 2009~2016) and the data of Shihmen, Xia-Yun, Chang-Xing, Gao-Yi, San-Guang, Yu-Feng, Xiu-Luan, Chi-Duan, Ba-Ling, Ga-La-He, An-Bu, Xin-Bai-Shi, Chen-Shi-Bao, Fu-Xing, and Xi-Qui-Si-Shan Rainfall Stations (1965~2016) after dam construction of Shihmen Reservoir (1964) and the adoption of anomaly method with significant level α=5％. The result of trend test of observed discharge indicates that, after dam construction of Shihmen Reservoir (1964), there is no significant trend in annual runoff, annual mean daily discharge, max peak discharge, and annual maximum daily discharge of all discharge measuring stations, except for the significant decline trend of annual maximum daily discharge (1965~2002) of Xia-Yun Discharge Measuring Station. This result indicates the trend of daily depletion of minimum discharge after dam construction (1964) in Shihmen Reservoir catchment area. The result of trend test of observed rainfall indicates that, the rainfall variables of various rainfall stations showing rising trends after dam construction in Shihmen Reservoir (1964) include: annual rainfall of Shihmen, Yu-Feng, and Ba-Ling Rainfall Stations, annual rainy days of Xi-Qui-Si-Shan Rainfall Station, and maximum annual three-day rainfall of Chang-Xing Rainfall Station; the rainfall variables showing significant declining trend include: annual rainy days of San-Guang and Yu-Feng Rainfall Stations. This result indicates the trend of significantly increased rainfall intensity of Yu-Feng Rainfall Station in Shihmen Reservoir catchment area after dam construction (1964).
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I-Fan, Tsai, and 蔡逸凡. "Rainfall Index for Estimating Reservoir Sediment Fluctuation--A Case Study of the Feitsui Reservoir and the Shihmen Reservoir in Taiwan." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/58187381289190135671.
Full textAbstract:
碩士國立臺灣大學
地理環境資源學研究所
92
In addition to the significant temporal and spatial variation of precipitation, the majority of the rivers of Taiwan are also short and flashing. As a result, reservoirs are built to increase the usage of the water resources. However, fractured geology and steep topography together with frequent earthquakes and storms, lead to severe soil erosion, landslide, and debris flow hazards, which produce significant amount of sediments and result in the reduction of lifespan and efficiency of reservoirs. Therefore, this research aims to establish a simple rainfall index for predicting sediment fluctuation in reservoirs. The Feitsui and the Shihmen Reservoir in northern Taiwan are selected as the study sites. Based on rainfall thresholds, four annual indices including annual rainfall, annual effective daily rainfall, annual effective hourly rainfall, and annual effective rainfall kinetic energy, are calculated for the period between 1993 and 1999. The relationship between the unit sediment yield, which is the ratio of annual reservoir sedimentation rate (m3) and the drainage basin area (km2), and each of the rainfall indices was analyzed to find the best rainfall index and its related threshold. And a preliminary regression is proposed. The annual effective rainfall kinetic energy index derived from the raingauges located in areas subjected to the highest landuse intensity stands out as the best index for estimating the fluctuation of the reservoirs’ sedimentation rates. The calculation reaches the best results when I＞25mm/hr and I＞25mm/hr or I＞30mm/hr were selected for the Feitsui Reservoir and Shihmen Reservoir in respective for screening rainfall data. After standardizing the unit area sediment yield and the annual effective rainfall kinetic energy index values, the two data sets were combined to derive a regressive relationship, Y=0.94X (r=0.94). Based on the equation, the unit area sediment yield in 1999 for the two reservoirs were estimated, and the resulting errors were 342.53 m3/km2 and 413.86m3/km2 in respective, which compared to the yearly fluctuation magnitude of the sedimentation rates are relatively small. Therefore, we can estimate reservoir sediment fluctuation efficiently with the regressive relationship in northern Taiwan.
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Ko, Ssu-Wei, and 柯思瑋. "The Risk Analysis of Reservoir Water Supply under High Turbidity- Case Study of the Shihmen Reservoir." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/76605285618843856931.
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chang, Jann-yuan, and 張振源. "Applications of lumped and distributed runoff models in Shihmen reservoir watershed." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/64652349314006819221.
Full textAbstract:
碩士國立臺灣海洋大學
河海工程學系
95
Abstract Watershed rainfall-runoff simulation can be classified into lumped routing and distributed routing. The unit hydrograph, which is the hydrologic response function for a unit rainfall input at the watershed outlet, is the well-known lumped model. By using continuity equation and momentum equation, a distributed routing model associated with a conceptual model can simulate the propagation of flood wave in the watershed. The purpose of this study is to investigate the differences in rainfall-runoff simulating using the lumped model and the distributed model. In this study, the HEC-GeoHMS was applied to obtain the stream network, subwatershed boundary, and geomorphic factors. Consequently, the kinematic-wave V-shaped model in the HEC-HMS was applied to perform the runoff routing from a lumped system to distributed systems. The methodology was applied to the upstream watershed of Hsia-Yun, which is located in the Shihmen Reservoir watershed. In performing the lumped and distributed runoff routing, the watershed was divided into 1, 5, 9, and 14 subwatersheds. Hydrological records from four typhoon events were selected for model simulations. The results show that the channel roughness coefficient calibrated by using a distributed model is larger than that calibrated by using a lumped model. Moreover, the roughness coefficient calibrated in the upstream subwatersheds is larger than that obtained from the downstream subwatersheds. The simulation results generated by using the kinematic-wave V-shaped model were also compared with the results generated from a kinematic-wave based GIUH model. Key word: HEC-GeoHMS、HEC-HMS、Distributed runoff models、Lumped runoff models、KW-GIUH
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Chang, Shun-chi, and 張舜琦. "Debris flow susceptibility analysis – A case study in Shihmen Reservoir Watershed." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/87527592554590561945.
Full textAbstract:
碩士國立中央大學
應用地質研究所
95
In this study, factors used in the susceptibility analysis includes the watershed area, the length of main stream, the shape factor, relative height of watershed, slope of main stream, hypsometric integral, area of watershed slope great than 20°, area of landslide, and total rainfall of a storm event. These factors were calculated for each unit of a sub-watershed which is defined by an overflow point. Then these factors were used as input into discriminant analysis, logistic regression and fuzzy neural network to evaluate sub-watershed’s debris flow susceptibility in Shihmen Reservoir Watershed. This study focus on two different kind of cases: historical debris flow susceptibility analysis and the AERE typhoon induced debris flow susceptibility analysis. In the historical debris flow susceptibility analysis, the potential debris flow streams were acquired from the Soil and Water Conservation Bureau, Taiwan (WCB). The overall accuracy of discriminant analysis, logistic regression, and fuzzy neural Network are 76.8%, 78.6%, and 94.6%, respectively. Fuzzy neural network has the highest overall accuracy in historical debris flow susceptibility analysis. The debris flows induced by AERE typhoon are base on the changes detected from satellite images before and that after the typhoon event. The overall accuracy of discriminant analysis, logistic regression and fuzzy neural network are 94.1%, 100.0%, and 98.5%, respectively. Logistic regression method has the best performance in AERE typhoon induced debris flow susceptibility analysis. From the comparison of historical debris flow susceptibility analysis and AERE typhoon induced debris flow susceptibility analysis, we can find that AERE typhoon induced debris flow susceptibility analysis has better accuracy. This is because the AERE typhoon induced debris flow susceptibility analysis has more definite debris flow data and also because the rainfall data as an import factor are considered. On the other hand and in the historical debris flow susceptibility analysis, most of debris flow streams are not well defined and mixed with the consideration of property lose, therefore , a less accuracy was presented in the result of analysis.