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Journal articles on the topic 'Reservoir inflows'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Viterbo, Francesca, Laura Read, Kenneth Nowak, et al. "General Assessment of the Operational Utility of National Water Model Reservoir Inflows for the Bureau of Reclamation Facilities." Water 12, no. 10 (2020): 2897. http://dx.doi.org/10.3390/w12102897.

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This work investigates the utility of the National Oceanic and Atmospheric Administration’s National Water Model (NWM) for water management operations by assessing the total inflow into a select number of reservoirs across the Central and Western U.S. Total inflow is generally an unmeasured quantity, though critically important for anticipating both floods and shortages in supply over a short-term (hourly) to sub-seasonal (monthly) time horizon. The NWM offers such information at over 5000 reservoirs across the U.S., however, its skill at representing inflow processes is largely unknown. The g

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2

Bennis, Saad, and Narut Kang. "Multivariate Technique for Validating Historical Hydrometric Data with Redundant Measurements." Hydrology Research 31, no. 2 (2000): 107–26. http://dx.doi.org/10.2166/nh.2000.0008.

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The aim of this research was to develop an automated methodology for validating chronological series of natural inflows to reservoirs. Theoretically, gauges located on the same reservoir should indicate the same reading. However, under the influence of meteorological and hydraulic factors, or simply because of failed measuring equipment, there may be large deviations between the various measurements. Since the calculation of historical natural inflows is directly linked to the measurement of reservoir level by the water balance equation, there will be as many series of natural inflows as there

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3

Pieters, Roger, and Gregory A. Lawrence. "Plunging inflows and the summer photic zone in reservoirs." Water Quality Research Journal 47, no. 3-4 (2012): 268–75. http://dx.doi.org/10.2166/wqrjc.2012.143.

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Kinbasket and Revelstoke Reservoirs are part of the Columbia River system in eastern British Columbia, Canada. Hydroelectricity from these large reservoirs represents about 30% of the province's generation capacity. Of interest to water use planning is the effect of reservoir operation on pelagic productivity. We address one small part of this question, namely, the supply of nutrients carried by inflows that plunge below the photic zone during the summer. Using an idealized water balance for the photic zone, three cases are considered: (1) a shallow outlet, (2) a deep outlet, and (3) no outflo

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4

Sutlovic, Elis, Snjezana Cujic-Coko, and Ivan Medic. "Characteristics of basin inflows a statistical analysis for long-term/mid-term hydrothermal scheduling." Thermal Science 18, no. 3 (2014): 799–809. http://dx.doi.org/10.2298/tsci1403799s.

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The presented paper focuses on the characteristics of reservoir inflows and the appropriate inflow model for long-term/mid-term hydrothermal scheduling. The goal was to find the type of distribution that best fits the observed series of monthly and weekly average inflows in most cases for a model which considers the inflows as independent random variables without time correlation. Also, the objective was to explore the correlation between the inflows during time periods (for weekly and monthly intervals, respectively), and to investigate whether the more complex model of reservoir inflow as a

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5

Sriworamas, Krit, Anongrit Kangrang, Teerawat Thongwan, and Haris Prasanchum. "Optimal Reservoir of Small Reservoirs by Optimization Techniques on Reservoir Simulation Model." Advances in Civil Engineering 2021 (June 15, 2021): 1–14. http://dx.doi.org/10.1155/2021/6625743.

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Reservoir rule curves are essential rules for store activity. This investigation connected the Genetic Algorithm, Firefly Algorithm, Bat Algorithm, Flower Pollination Algorithm, and Tabu Search Algorithm associated with the store reproduction model to look through the ideal supply standard bends, utilizing the Huay Ling Jone and Huay Sabag supplies situated in Yasothorn Province, Thailand, as the contextual investigation. Memorable inflow information of the two repositories were utilized in this investigation, and 1,000 examples of engineered inflows of stores were utilized to recreate the rep

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6

Uang-Aree, Prawit, and Sununtha Kingpaiboon. "Possibility of GPS precipitable water vapour for reservoir inflow forecasting." Journal of Water and Land Development 36, no. 1 (2018): 161–71. http://dx.doi.org/10.2478/jwld-2018-0016.

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AbstractWe investigated the possibility of using GPS precipitable water vapour (GPS-PWV) for forecasting reservoir inflow. The correlations between monthly GPS-PWV and the inflow of two reservoirs were examined and the relationship tested, using a group method of data handling (GMDH) type neural network algorithm. The daily and monthly reservoir inflows were directly proportional to daily and monthly GPS-PWV trends. Peak reservoir inflow, however, shifted from the peak averages for GPS-PWV. A strong relationship between GPS-PWV and inflow was confirmed by high R2 values, high coefficients of c

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7

Wu, Binbin, Guoqiang Wang, Changming Liu, and Zongxue Xu. "Modeling impacts of highly regulated inflow on thermal regime and water age in a shallow reservoir." Journal of Hydroinformatics 15, no. 4 (2013): 1312–25. http://dx.doi.org/10.2166/hydro.2013.178.

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Thermal regime and transport of dissolved pollutants, strongly related to water quality and algae bloom in reservoirs, may be quantized by indicators of water temperature and water age, respectively, and these indicators are more spatially and temporally variant in shallow reservoirs. Here, a two-dimensional model was used for studying characteristics of the indicators in Douhe Reservoir, based on data of the year 2008. Douhe Reservoir is a typical shallow reservoir in Northern China, characterized by highly regulated inflow and thermal effluent. The impacts of the regulated inflow on reservoi

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8

Coerver, Hubertus M., Martine M. Rutten, and Nick C. van de Giesen. "Deduction of reservoir operating rules for application in global hydrological models." Hydrology and Earth System Sciences 22, no. 1 (2018): 831–51. http://dx.doi.org/10.5194/hess-22-831-2018.

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Abstract. A big challenge in constructing global hydrological models is the inclusion of anthropogenic impacts on the water cycle, such as caused by dams. Dam operators make decisions based on experience and often uncertain information. In this study information generally available to dam operators, like inflow into the reservoir and storage levels, was used to derive fuzzy rules describing the way a reservoir is operated. Using an artificial neural network capable of mimicking fuzzy logic, called the ANFIS adaptive-network-based fuzzy inference system, fuzzy rules linking inflow and storage w

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9

Yang, Sheng-Chi, and Tsun-Hua Yang. "Uncertainty Assessment: Reservoir Inflow Forecasting with Ensemble Precipitation Forecasts and HEC-HMS." Advances in Meteorology 2014 (2014): 1–11. http://dx.doi.org/10.1155/2014/581756.

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During an extreme event, having accurate inflow forecasting with enough lead time helps reservoir operators decrease the impact of floods downstream. Furthermore, being able to efficiently operate reservoirs could help maximize flood protection while saving water for drier times of the year. This study combines ensemble quantitative precipitation forecasts and a hydrological model to provide a 3-day reservoir inflow in the Shihmen Reservoir, Taiwan. A total of six historical typhoons were used for model calibration, validation, and application. An understanding of cascaded uncertainties from t

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10

Byun, Do-Seong, Yang-Ki Cho, In-Ae Huh, and Deirdre E. Hart. "Runoff-induced vertical thermal dynamics in a canyon-shaped reservoir during the summer monsoon." Marine and Freshwater Research 56, no. 7 (2005): 959. http://dx.doi.org/10.1071/mf04285.

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During the summer rainy season, double thermoclines were observed in a small canyon-shaped reservoir. The physical processes leading to thermocline evolution are examined from the vertical temperature profile observed along the reservoir before and after rain. Observations show that their evolution is related to the inflow of runoff, which is colder than the reservoir surface water and post-rain fair-weather conditions. Tongue-like distributions of turbidity, conductivity and nutrient concentrations downstream from the headwater clearly reveal the presence of runoff-induced intermediate inflow

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11

Latif, Sarmad Dashti, Suzlyana Marhain, Md Shabbir Hossain, et al. "Optimizing the Operation Release Policy Using Charged System Search Algorithm: A Case Study of Klang Gates Dam, Malaysia." Sustainability 13, no. 11 (2021): 5900. http://dx.doi.org/10.3390/su13115900.

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In planning and managing water resources, the implementation of optimization techniques in the operation of reservoirs has become an important focus. An optimal reservoir operating policy should take into consideration the uncertainty associated with uncontrolled reservoir inflows. The charged system search (CSS) algorithm model is developed in the present study to achieve optimum operating policy for the current reservoir. The aim of the model is to minimize the cost of system performance, which is the sum of square deviations from the distinction between the release of the target and the act

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12

Mhiribidi, Delight, Joel Nobert, Webster Gumindoga, and Donald T. Rwasoka. "Optimal water resource allocation modelling in the Lowveld of Zimbabwe." Proceedings of the International Association of Hydrological Sciences 378 (May 29, 2018): 67–72. http://dx.doi.org/10.5194/piahs-378-67-2018.

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Abstract. The management and allocation of water from multi-reservoir systems is complex and thus requires dynamic modelling systems to achieve optimality. A multi-reservoir system in the Southern Lowveld of Zimbabwe is used for irrigation of sugarcane estates that produce sugar for both local and export consumption. The system is burdened with water allocation problems, made worse by decommissioning of dams. Thus the aim of this research was to develop an operating policy model for the Lowveld multi-reservoir system.The Mann Kendall Trend and Wilcoxon Signed-Rank tests were used to assess the

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13

Haché, Mario, Marc Durocher, and Bernard Bobée. "Modélisation non paramétrique de la relation entre les caractéristiques du vent et la différence de niveaux sur un grand réservoir." Canadian Journal of Civil Engineering 30, no. 4 (2003): 684–95. http://dx.doi.org/10.1139/l03-049.

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The natural inflow at a site is a key variable for optimal management of water resources, particularly for hydroelectric production. For sites with dams and hydroelectric powerplants, this variable cannot be measured directly, and the water balance equation is used to determine the quantity of water a site receives on its surface during a certain period of time. However, several errors affect the natural inflows computed this way. One of the principal sources of uncertainty for large reservoirs is the nonrepresentativeness of water level because of the wind effect. To quantify the effect of wi

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14

Salami, Adebayo Wahab, Bolaji Fatai Sule, Tope Lacroix Adunkpe, Ayanniyi Mufutau Ayanshola, and Solomon Olakunle Bilewu. "Evaluation of the Hydropower Generation Potential of a Dam Using Optimization Techniques: Application to Doma Dam, Nassarawa, in North Central Nigeria." Slovak Journal of Civil Engineering 25, no. 1 (2017): 1–9. http://dx.doi.org/10.1515/sjce-2017-0001.

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Abstract Optimization models have been developed to maximize annual energy generation from the Doma dam, subject to the constraint of releases for irrigation, ecological purposes, the water supply, the maximum yield from the reservoir and reservoir storage. The model was solved with LINGO software for various mean annual inflow exceedence probabilities. Two scenarios of hydropower retrofitting were considered. Scenario 1, with the reservoir inflows at 50%, 75%, and 90% probabilities of exceedence, gives the total annual hydropower as 0.531 MW, 0.450 MW and 0.291 MW, respectively. The correspon

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15

Phien, Huynh Ngoc. "Reservoir storage capacity with gamma inflows." Journal of Hydrology 146 (June 1993): 383–89. http://dx.doi.org/10.1016/0022-1694(93)90285-h.

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16

Yu, Chunxue, Xinan Yin, Zhifeng Yang, and Zhi Dang. "Sustainable Water Resource Management of Regulated Rivers under Uncertain Inflow Conditions Using a Noisy Genetic Algorithm." International Journal of Environmental Research and Public Health 16, no. 5 (2019): 868. http://dx.doi.org/10.3390/ijerph16050868.

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Ecofriendly reservoir operation is an important tool for sustainable water resource management in regulated rivers. Optimization of reservoir operation is potentially affected by the stochastic characteristics of inflows. However, inflow stochastics are not widely incorporated in ecofriendly reservoir operation optimization. The reasons might be that computational cost and unsatisfactory performance are two key issues for reservoir operation under uncertainty inflows, since traditional simulation methods are usually needed to evaluate over many realizations and the results vary between differe

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17

Zabalza-Martínez, J., S. Vicente-Serrano, J. López-Moreno, et al. "The Influence of Climate and Land-Cover Scenarios on Dam Management Strategies in a High Water Pressure Catchment in Northeast Spain." Water 10, no. 11 (2018): 1668. http://dx.doi.org/10.3390/w10111668.

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This paper evaluates the response of streamflow in a Mediterranean medium-scaled basin under land-use and climate change scenarios and its plausible implication on the management of Boadella–Darnius reservoir (NE Spain). Land cover and climate change scenarios supposed over the next several decades were used to simulate reservoir inflow using the Regional Hydro-Ecologic Simulation System (RHESsys) and to analyze the future impacts on water management (2021–2050). Results reveal a clear decrease in dam inflow (−34%) since the dam was operational from 1971 to 2013. The simulations obtained with

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18

Chiamsathit, Chuthamat, Adebayo J. Adeloye, and Soundharajan Bankaru-Swamy. "Inflow forecasting using Artificial Neural Networks for reservoir operation." Proceedings of the International Association of Hydrological Sciences 373 (May 12, 2016): 209–14. http://dx.doi.org/10.5194/piahs-373-209-2016.

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Abstract. In this study, multi-layer perceptron (MLP) artificial neural networks have been applied to forecast one-month-ahead inflow for the Ubonratana reservoir, Thailand. To assess how well the forecast inflows have performed in the operation of the reservoir, simulations were carried out guided by the systems rule curves. As basis of comparison, four inflow situations were considered: (1) inflow known and assumed to be the historic (Type A); (2) inflow known and assumed to be the forecast (Type F); (3) inflow known and assumed to be the historic mean for month (Type M); and (4) inflow is u

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19

Ehteram, Mohammad, Vijay P. Singh, Hojat Karami, et al. "Irrigation Management Based on Reservoir Operation with an Improved Weed Algorithm." Water 10, no. 9 (2018): 1267. http://dx.doi.org/10.3390/w10091267.

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Water scarcity is a serious problem throughout the world. One critical part of this problem is supplying sufficient water to meet irrigation demands for agricultural production. The present study introduced an improved weed algorithm for reservoir operation with the aim of decreasing irrigation deficits. The Aswan High Dam, one of the most important dams in Egypt, was selected for this study to supply irrigation demands. The improved weed algorithm (IWA) had developed local search ability so that the exploration ability for the IWA increased and it could escape from local optima. Three inflows

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20

Thongwan, Teerawat, Anongrit Kangrang, Rapeepat Techarungreungsakul, and Ratsuda Ngamsert. "Future Inflow under Land Use and Climate Changes and Participation Process into the Medium-Sized Reservoirs in Thailand." Advances in Civil Engineering 2020 (January 20, 2020): 1–17. http://dx.doi.org/10.1155/2020/5812530.

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The rainfall and runoff within a watershed area upper reservoir are necessary data for reservoir operation. In this manner, climate and land use changes are legitimately affected to inflow trademark into the reservoir storage. This investigation expects to appraise future inflow under the effect of atmosphere and land use changes of the Huay Sabag and Huay Ling Jone reservoirs, Thailand, during the period 2018–2067. The future inflow was evaluated by utilizing the SWAT model with the PRECIS territorial atmosphere model of B2 emanation situation, and considering land use information from the CA

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21

Shan, He, Yin Xin’an, and Zhifeng Yang. "Identifying effective reservoir capacity, water supply, inflow for tradeoff between human and ecological demand." MATEC Web of Conferences 246 (2018): 01034. http://dx.doi.org/10.1051/matecconf/201824601034.

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To protect the river ecosystem and sustain ecological flow regime, it’s vital to consider environmental flow management in reservoir operation. Many researches try to use more detailed environmental flow management strategies to improve ecological flow regime. However, ecological flow regime not only is influenced by environmental flow management strategy, but also by three kinds of parameters, including reservoir capacity, reservoir inflow and water supply yield. The aim of this paper is to illustrate how ecological flow regime is affected by different reservoir capacities, reservoir inflows

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22

Westra, Seth, and Ashish Sharma. "Probabilistic Estimation of Multivariate Streamflow Using Independent Component Analysis and Climate Information." Journal of Hydrometeorology 10, no. 6 (2009): 1479–92. http://dx.doi.org/10.1175/2009jhm1121.1.

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Abstract A statistical estimation approach is presented and applied to multiple reservoir inflow series that form part of Sydney’s water supply system. The approach involves first identifying sources of interannual and interdecadal climate variability using a combination of correlation- and wavelet-based methods, then using this information to construct probabilistic, multivariate seasonal estimates using a method based on independent component analysis (ICA). The attraction of the ICA-based approach is that, by transforming the multivariate dataset into a set of independent time series, it is

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23

Shi, Lu, Bing Bai, Haiqing Wu, and Xiaochun Li. "Evaluating Reservoir Risks and Their Influencing Factors during CO2 Injection into Multilayered Reservoirs." Geofluids 2017 (2017): 1–14. http://dx.doi.org/10.1155/2017/6059142.

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Wellbore and site safety must be ensured during CO2 injection into multiple reservoirs during carbon capture and storage projects. This study focuses on multireservoir injection and investigates the characteristics of the flow-rate distribution and reservoir-risk evaluation as well as their unique influences on multireservoir injection. The results show that more CO2 enters the upper layers than the lower layers. With the increase in injection pressure, the risks of the upper reservoirs increase more dramatically than those of the low reservoirs, which can cause the critical reservoir (CR) to

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24

Nair, Sukanya J., and K. Sasikumar. "Fuzzy reliability-based optimization of a hydropower reservoir." Journal of Hydroinformatics 21, no. 2 (2019): 308–17. http://dx.doi.org/10.2166/hydro.2019.078.

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Abstract Reservoir operation modeling and optimization are inevitable components of water resources planning and management. Determination of reservoir operating policy is a multi-stage decision-making problem characterized by uncertainty. Uncertainty in inflows and power demands lead to varying degrees of the working of a reservoir from one period to another. This transition, being ambiguous in nature, can be addressed in a fuzzy framework. The different working states of the reservoir are described as fuzzy states. Based on the degree of success in meeting the power demand and randomness ass

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25

Glynn, John E., and Peter W. Glynn. "On the behaviour of a long cascade of linear reservoirs." Journal of Applied Probability 37, no. 02 (2000): 417–28. http://dx.doi.org/10.1017/s002190020001562x.

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This paper describes the limiting asymptotic behaviour of a long cascade of linear reservoirs fed by stationary inflows into the first reservoir. We show that the storage in the nth reservoir becomes asymptotically deterministic as n → ∞, and establish a central limit theorem for the random fluctuations about the deterministic approximation. In addition, we prove a large deviations theorem that provides precise logarithmic asymptotics for the tail probabilities associated with the storage in the nth reservoir when n is large.

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Glynn, John E., and Peter W. Glynn. "On the behaviour of a long cascade of linear reservoirs." Journal of Applied Probability 37, no. 2 (2000): 417–28. http://dx.doi.org/10.1239/jap/1014842547.

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This paper describes the limiting asymptotic behaviour of a long cascade of linear reservoirs fed by stationary inflows into the first reservoir. We show that the storage in the nth reservoir becomes asymptotically deterministic as n → ∞, and establish a central limit theorem for the random fluctuations about the deterministic approximation. In addition, we prove a large deviations theorem that provides precise logarithmic asymptotics for the tail probabilities associated with the storage in the nth reservoir when n is large.

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27

Marti, Clelia Luisa, Rianda Mills, and Jörg Imberger. "Pathways of multiple inflows into a stratified reservoir: Thomson Reservoir, Australia." Advances in Water Resources 34, no. 5 (2011): 551–61. http://dx.doi.org/10.1016/j.advwatres.2011.01.003.

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28

Celeste, Alcigeimes B., Wilson F. Curi, and Rosires C. Curi. "Implicit Stochastic Optimization for deriving reservoir operating rules in semiarid Brazil." Pesquisa Operacional 29, no. 1 (2009): 223–34. http://dx.doi.org/10.1590/s0101-74382009000100011.

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This paper deals with the application of Implicit Stochastic Optimization (ISO) to determine monthly operating rules for a reservoir system located in the semiarid Northeast of Brazil. ISO employs a deterministic optimization model to find optimal reservoir allocations under several possible inflow scenarios and later constructs the rules by analyzing the ensemble of these optimal releases. The operating policies provide the monthly reservoir release conditioned on the storage at the beginning of the month and the inflow predicted for the month. In addition to the classical regression analysis

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29

Lu, Liyu, Chunhua Tao, and Weibin Huang. "Study on Flood and Sediment Joint Operation of Dadu River Downstream Cascade Reservoirs." MATEC Web of Conferences 246 (2018): 01082. http://dx.doi.org/10.1051/matecconf/201824601082.

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There is large amount of high hardness sand in the water flow in Dadu river. The problem of sediment deposition is very prominent in the two early reservoirs, Gongzui reservoir and Tongjiezi reservoir. In order to decrease sediment deposition effectively and extend the service life of them, the sediment characteristics of Dadu river cascade hydropower stations are analysed, as well as changes of sediment deposition in Gongzui reservoir and Tongjiezi reservoir after Pubugou reservoir puts into operation. Flood forecast and pre-discharge operation theory are studied for utilizing the discarding

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30

Nikitin, V. M., and E. N. Malinovskaya. "Hydro Power Plants in the Interconnected Power System of Siberia: Trends and Problems." E3S Web of Conferences 209 (2020): 05019. http://dx.doi.org/10.1051/e3sconf/202020905019.

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The paper discusses the trends, features, and current problems of the operation of hydro power plants in the interconnected power system (IPS) of Siberia. The main feature of the IPS of Siberia is a high proportion of hydro power plants and, as a result, a strong dependence of power generation on the natural fluctuations of water inflows into reservoirs. The problems affecting the power system efficiency arise when the inflows deviate from normal and close-to-normal values. The study indicates the need to improve the current system of managing and planning the operation of hydro power plants.

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Li, Yuanya, Junhua Zhang, and Huaibao Ma. "Analytical Froude number solution for reservoir density inflows." Journal of Hydraulic Research 49, no. 5 (2011): 693–96. http://dx.doi.org/10.1080/00221686.2011.593905.

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Mimikou, V., and Nalbandis Grad. "Influence Of Reservoir Inflows’ Persistence On Storage Capacity." International Journal of Modelling and Simulation 7, no. 4 (1987): 164–67. http://dx.doi.org/10.1080/02286203.1987.11760019.

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Changchit, Chaweng, and M. P. Terrell. "A multiobjective reservoir operation model with stochatic inflows." Computers & Industrial Engineering 24, no. 2 (1993): 303–13. http://dx.doi.org/10.1016/0360-8352(93)90016-q.

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Turner, Sean W. D., Wenwei Xu, and Nathalie Voisin. "Inferred inflow forecast horizons guiding reservoir release decisions across the United States." Hydrology and Earth System Sciences 24, no. 3 (2020): 1275–91. http://dx.doi.org/10.5194/hess-24-1275-2020.

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Abstract. Medium- to long-range forecasts often guide reservoir release decisions to support water management objectives, including mitigating flood and drought risks. While there is a burgeoning field of science targeted at improving forecast products and associated decision support models, data describing how and when forecasts are applied in practice remain undeveloped. This lack of knowledge may prevent hydrological modelers from developing accurate reservoir release schemes for large-scale, distributed hydrology models that are increasingly used to assess the vulnerabilities of large regi

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Schlein, G. A., I. I. Kleshchenko, A. A. Baluev, and A. F. Semenenko. "Development potential of jet pumps and technology in the oil and gas industry." Oil and Gas Studies, no. 3 (July 8, 2020): 75–88. http://dx.doi.org/10.31660/0445-0108-2020-3-75-88.

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The article deals with innovative technologies for the development and research of oil and gas wells by jet devices in various conditions of occurrence of productive formations. Data are given about the results of work with jet pumps for intensifying the inflows in fields of Western Siberia and about their efficiency to change well productivity. We show development potential of jet pumps and technology in the oil and gas industry to improve the quality of well construction and well operation. Attention is drawn to new technologies and designs of jet pumps, which have been developed for well de

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Arsenault, Richard, and Pascal Côté. "Analysis of the effects of biases in ensemble streamflow prediction (ESP) forecasts on electricity production in hydropower reservoir management." Hydrology and Earth System Sciences 23, no. 6 (2019): 2735–50. http://dx.doi.org/10.5194/hess-23-2735-2019.

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Abstract. This paper presents an analysis of the effects of biased extended streamflow prediction (ESP) forecasts on three deterministic optimization techniques implemented in a simulated operational context with a rolling horizon test bed for managing a cascade of hydroelectric reservoirs and generating stations in Québec, Canada. The observed weather data were fed to the hydrological model, and the synthetic streamflow subsequently generated was considered to be a proxy for the observed inflow. A traditional, climatology-based ESP forecast approach was used to generate ensemble streamflow sc

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37

Pacheco, F. S., M. C. S. Soares, A. T. Assireu, et al. "The effects of river inflow and retention time on the spatial heterogeneity of chlorophyll and water–air CO<sub>2</sub> fluxes in a tropical hydropower reservoir." Biogeosciences 12, no. 1 (2015): 147–62. http://dx.doi.org/10.5194/bg-12-147-2015.

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Abstract. Abundant research has been devoted to understanding the complexity of the biogeochemical and physical processes that are responsible for greenhouse gas (GHG) emissions from hydropower reservoirs. These systems may have spatially complex and heterogeneous GHG emissions due to flooded biomass, river inflows, primary production and dam operation. In this study, we investigated the relationships between the water–air CO2 fluxes and the phytoplanktonic biomass in the Funil Reservoir, which is an old, stratified tropical reservoir that exhibits intense phytoplankton blooms and a low partia

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Seidou, O., B. Robert, C. Marche, J. Rousselle, and M. Lefebvre. "Construction probabiliste de scénarios d'apports à un réservoir." Canadian Journal of Civil Engineering 31, no. 1 (2004): 146–54. http://dx.doi.org/10.1139/l03-108.

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The behaviour of a hydric system depends on three factors : (i) the state of the installation, (ii) the operating rules, and (iii) the inflows. While the first two factors are (in theory) known to the manager, the third can only be estimated by means of more or less precise forecasts. A significant part of the risk, to which is subjected the system at a given time, is induced by the uncertainty in the future inflows. The evaluation of this uncertainty is therefore a first step in the incorporation of risk into management. Its evaluation is then a stage preliminary to the integration of the ris

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Mamman, Mohammed J., Otache Y. Martins, Jibril Ibrahim, and Mohammed I. Shaba. "Evaluation of Best-Fit Probability Distribution Models for the Prediction of Inflows of Kainji Reservoir, Niger State, Nigeria." Air, Soil and Water Research 10 (January 1, 2017): 117862211769103. http://dx.doi.org/10.1177/1178622117691034.

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The analysis of time series is essential for building mathematical models to generate synthetic hydrologic records, to forecast hydrologic events, to detect intrinsic stochastic characteristics of hydrologic variables, as well as to fill missing and extend records. To this end, various probability distribution models were fitted to river inflows of Kainji Reservoir in New Bussa, Niger State, Nigeria. This is to evaluate the probability function that is best suitable for the prediction of their values and subsequently using the best model to predict for both the expected maximum and minimum mon

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Nandalal, K. D. W., and Janos J. Bogardi. "Optimal operation of a reservoir for quality control using inflows and outflows." Water Science and Technology 31, no. 8 (1995): 273–80. http://dx.doi.org/10.2166/wst.1995.0319.

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This paper presents two optimization models developed for the derivation of operation policies for a reservoir when the quality considerations are important besides satisfying the quantity requirement. In one model only the releases are controlled. In the other model both inflows and releases are controlled. Reservoir operational policy is based on the Incremental Dynamic Programming technique. Complete mixing is assumed to be occurring in the reservoir throughout the year. The models are applied to a reservoir on the Shapur river in Southern Iran. The results obtained from the models show the

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Hoseinzadeh, Toktam, Mojtaba Shourian, and Jafar Yazdi. "Optimum design and operation of a hydropower reservoir considering uncertainty of inflow." Journal of Hydroinformatics 22, no. 6 (2020): 1452–67. http://dx.doi.org/10.2166/hydro.2020.044.

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Abstract Due to the large number of variables and nonlinear relations, hydropower plant design and operation optimization problems belong to the Non-polynomial hard class of problems. In this study, optimum design and operation of a hydropower reservoir is compared in two cases using deterministic and stochastic inflows by two meta-heuristic algorithms. Particle swarm optimization (PSO) and cuckoo optimization algorithm (COA) are applied under two conditions of using the historical inflow time series as a deterministic approach and the eigenvector-based synthetic generations as a stochastic ap

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Straškrabová, V., J. Komárková, and V. Vyhnálek. "Degradation of Organic Substances in Reservoirs." Water Science and Technology 28, no. 6 (1993): 95–104. http://dx.doi.org/10.2166/wst.1993.0133.

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Due to the retention of water in an impoundment, the degradation of easily decomposable organic substances expressed as BOD (“self- purification”) is higher in a reservoir compared to a similar stretch of flowing river. For the same reason, the production of new organic matter by phytoplankton (PP) is also enhanced after impoundment. Data on reservoirs with theoretical retention time (RT) in the range of 1 - 535 days showed that PP reached 9 - 99% of the total input (TI) expressed as BOD (TI = PP + BOD load by inflows). The share of PP increases with increasing RT, decreases with increasing me

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Nguyen, Anh, Thomas Cochrane, and Markus Pahlow. "A Framework to Assess the Reliability of a Multipurpose Reservoir under Uncertainty in Land Use." Water 13, no. 3 (2021): 287. http://dx.doi.org/10.3390/w13030287.

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Socioeconomic development in watersheds lead to land-use changes, which can alter water and sediment inflows into reservoirs, leading to uncertainty in water supply reliability. A modelling framework coupling the Soil and Water Assessments Tool (SWAT) and the @RISK genetic algorithm optimisation tool was developed to optimise water allocation and estimate water supply reliability under uncertainty in future land-use. The multi-purpose Nuicoc reservoir in Vietnam was used as a case study. Modelling results showed that an expansion of the urban areas by 10% and conversion of 5% of the forest to

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Pacina, Jan, Zuzana Lenďáková, Jiří Štojdl, Tomáš Matys Grygar, and Martin Dolejš. "Dynamics of Sediments in Reservoir Inflows: A Case Study of the Skalka and Nechranice Reservoirs, Czech Republic." ISPRS International Journal of Geo-Information 9, no. 4 (2020): 258. http://dx.doi.org/10.3390/ijgi9040258.

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A wide variety of geographic information system tools and methods was used for pre-dam topography reconstruction and reservoir bottom surveying in two dam reservoirs in the Ohře River, Czech Republic. The pre-dam topography was reconstructed based on archival aerial imagery and old maps. The benefits and drawbacks of these methods were tested and explained with emphasis on the fact that not all processed archival data are suitable for pre-dam topography modeling. Bathymetric surveying of a reservoir bottom is presently routine, but in this study, we used a wide combination of bathymetric mappi

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Cuevas-Velásquez, Víctor, Alvaro Sordo-Ward, Jaime H. García-Palacios, Paola Bianucci, and Luis Garrote. "Probabilistic Model for Real-Time Flood Operation of a Dam Based on a Deterministic Optimization Model." Water 12, no. 11 (2020): 3206. http://dx.doi.org/10.3390/w12113206.

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This paper presents a real-time flood control model for dams with gate-controlled spillways that brings together the advantages of an optimization model based on mixed integer linear programming (MILP) and a case-based learning scheme using Bayesian Networks (BNets). A BNet model was designed to reproduce the causal relationship between inflows, outflows and reservoir storage. The model was trained with synthetic events generated with the use of the MILP model. The BNet model produces a probabilistic description of recommended dam outflows over a time horizon of 1 to 5 h for the Talave reservo

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Xu, Wei, Xiaoying Fu, Xia Li, and Ming Wang. "Data transformation models utilized in Bayesian probabilistic forecast considering inflow forecasts." Hydrology Research 50, no. 5 (2019): 1267–80. http://dx.doi.org/10.2166/nh.2019.028.

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Abstract This paper presents a new Bayesian probabilistic forecast (BPF) model to improve the efficiency and reliability of normal distribution transformation and to describe the uncertainties of medium-range forecasting inflows with 10 days forecast horizons. In this model, the inflow data will be transformed twice to a standard normal distribution. The Box–Cox (BC) model is first used to quickly transform the inflow data with a normal distribution, and then, the transformed data are converted to a standard normal distribution by the meta-Gaussian (MG) model. Based on the transformed inflows

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Zhong, Yixuan, Shenglian Guo, Huanhuan Ba, Feng Xiong, Fi-John Chang, and Kairong Lin. "Evaluation of the BMA probabilistic inflow forecasts using TIGGE numeric precipitation predictions based on artificial neural network." Hydrology Research 49, no. 5 (2018): 1417–33. http://dx.doi.org/10.2166/nh.2018.177.

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Abstract Reservoir inflow forecasting is a crucial task for reservoir management. Without considering precipitation predictions, the lead time for inflow is subject to the concentration time of precipitation in the basin. With the development of numeric weather prediction (NWP) techniques, it is possible to forecast inflows with long lead times. Since larger uncertainty usually occurs during the forecasting process, much attention has been paid to probabilistic forecasts, which uses a probabilistic distribution function instead of a deterministic value to predict the future status. In this stu

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Seifi, Abbas, and Keith W. Hipel. "Interior-Point Method for Reservoir Operation with Stochastic Inflows." Journal of Water Resources Planning and Management 127, no. 1 (2001): 48–57. http://dx.doi.org/10.1061/(asce)0733-9496(2001)127:1(48).

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Sankarasubramanian, A., Upmanu Lall, Naresh Devineni, and Susan Espinueva. "The Role of Monthly Updated Climate Forecasts in Improving Intraseasonal Water Allocation." Journal of Applied Meteorology and Climatology 48, no. 7 (2009): 1464–82. http://dx.doi.org/10.1175/2009jamc2122.1.

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Abstract Seasonal streamflow forecasts contingent on climate information are essential for short-term planning (e.g., water allocation) and for setting up contingency measures during extreme years. However, the water allocated based on the climate forecasts issued at the beginning of the season needs to be revised using the updated climate forecasts throughout the season. In this study, reservoir inflow forecasts downscaled from monthly updated precipitation forecasts from ECHAM4.5 forced with “persisted” SSTs were used to improve both seasonal and intraseasonal water allocation during the Oct

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Yannopoulos, Panayotis, and Alexander Demetracopoulos. "A Novel Methodology for Multiple-Year Regulation of Reservoir Active Storage Capacity." Water 10, no. 9 (2018): 1254. http://dx.doi.org/10.3390/w10091254.

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Reservoir design entails the determination of the required storage capacity over multiple years of low flow conditions to ensure the coverage of multiple-purpose water demands. Dam operation depends on many factors that may result in the decrease of required safe yields, leading to inadequate outflow supplies in the design period. This study addresses two issues: (a) the computation of reservoir active storage capacity performed with the aid of the new concept of a zero-height dam, a procedure easy to interpret physically and implement computationally; and (b) the generation of appropriate inf

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