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Journal articles on the topic 'Rivers Sate'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Gift, Kiisi Nkin. "Ambient Air Quality and Noise Assessment in Eleme Communities, Rivers State, Nigeria." World Journal of Advanced Research and Reviews 19, no. 2 (2023): 894–906. https://doi.org/10.5281/zenodo.10846723.

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Problems caused by ambient air pollution on human and the environment can be averted by steadily and strictly monitoring of the concentrations of outdoor pollutants. Human activities have triggered changes in the earths atmosphere. In this research, 7(Seven) selected Eleme communities, 4(four) zones in each community and 28(Twenty eight) sampling points in all locations were assessed for the concentrations of CO, SO<sub>2 </sub>, NO<sub>2 </sub>, NO, CO<sub>2 </sub>, SPM, O<sub>2 </sub>, noise level and as well Meteorological parameters using methods recommended by ASTM for

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2

Onyiri, Chinenyenwa Jacqueline, Kingsley Moses Amadi, Barine Edwin Sunday, and Samuel Chiburoma Chinda. "THE PREVALENCE AND SOURCES OF OCCUPATIONAL STRESS AMONGST HEALTHCARE WORKERS IN RIVERS STATE." International Journal of Healthcare Sciences 10, no. 1 (2022): 100–115. https://doi.org/10.5281/zenodo.6786555.

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<strong>Abstract:</strong> This study investigated the prevalence and sources of occupational stress amongst healthcare workers in in Rivers State. The descriptive, cross-sectional design was used for the study. The population of the study comprised of 36,876 healthcare workers in Rivers State, with a sample size of 828 healthcare workers which was determined using the Borners’s formulae, and selected using the multistage sampling technique. A structured questionnaire was used for data collection and analysis was done using frequency, percentages, mean and standard deviation for research

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3

Akhigbe, Emanuel Aziegbe, and Worlu, G. O. Worlu, G.O. "Production Planning and Operational Efficiency in the Food and Beverage Industry in Nigeria." ANUSANDHAN – NDIM's Journal of Business and Management Research 2, no. 2 (2020): 16–26. http://dx.doi.org/10.56411/anusandhan.2020.v2i2.16-26.

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This study empirically tested the relationship between production planning in terms of manpower planning and material planning and operational efficiency of food and beverage industry in Rivers sate, Nigeria. It attempts to provide answer to the relationship between production planning and operational efficiency. Fifteen (15) firms were purposively selected from the food and beverage industry in Port Harcourt. Using the Spearman Rank Order Correlation Coefficient, we analyzed the data collected from the human resource manager, production manager and financial manager of the 15 selected food an

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4

Ginikachi, Adieme, Franca, and Ukala, Chinyere Catherine. "MANAGING TEACHERS FOR TRANSFORMATIVE LEARNING IN SECONDARY SCHOOLS IN RIVERS STATE, NIGERIA: AN IMPERATIVE FOR SUSTAINABLE NATIONAL TRANSFORMATION." International Journal of Education and Social Science Research 07, no. 06 (2024): 183–97. https://doi.org/10.37500/ijessr.2024.7613.

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This study examined how teachers can be managed for transformative learning in secondary schools in Rivers State, Nigeria: An imperative for sustainable national transformation. Two research questions and one hypothesis guided the study. A descriptive research design was adopted. The population comprised all the 286 principals in the 286 public senior secondary schools in Rivers State. Out of these principals, 170 are males while 116 are females. A sample of 129 teachers (77 males and 52 females), representing 45% of the population was drawn using both the simple random sampling and proportion

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5

GEORGE, Nchelem Rosemary (Ph.D), and Edith Chijindu (Ph.D) ONUEGBU. "Correlation between Secondary Students' Mathematical Skills and Academic Performance in Chemistry in Rivers State, Nigeria." International Journal of Research in Education and Sustainable Development 4, no. 5 (2024): 202–8. https://doi.org/10.5281/zenodo.12682060.

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<em>The study investigated the relationship between students’ mathematical skills and their performance in chemistry. Two objectives guided the study. The research was correlational in nature because it sought for relationship between variables of the study. Expo facto research design employed because the event had already taken place.  The population of the study consisted of all the two thousand one hundred and sixteen (2,116) senior secondary two (SS2) chemistry students in senior secondary coeducational public schools in Port Harcourt L.G.A of Rivers Sate, Nigeria. The purposive

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Dombrovskiy, K. O., and A. F. Rylsky. "Micro- and macrofauna of benthic invertebrates of the estuary section of the Mokra Moskovka, a small river in the City of Zaporizhzhia." Ukrainian hydrometeorological journal, no. 29 (July 21, 2022): 85–94. http://dx.doi.org/10.31481/uhmj.29.2022.07.

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Nowadays, in the period of scientific and technological progress, the anthropogenic impact on the environment keeps increasing. At the same time, its forms and its degree are very diverse. The study of aquatic ecosystems, including ecosystems of small rivers, is one of the applied environmental researches. Small rivers form water resources, hydrochemical composition and water quality of medium and large rivers. They form natural landscapes and contribute to human economic activities. Most of the indicators classify the current environmental state of small and medium rivers of Zaporizhzhi

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7

Peng, Jing, Shaoming Li, and Lan Qi. "Study on river regulation measures of dried-up rivers of Haihe River basin, China." Water Science and Technology 67, no. 6 (2013): 1224–29. http://dx.doi.org/10.2166/wst.2013.680.

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In recent years, the ecological environment of plain rivers within Haihe River basin is questionable because of severe water shortages. Most of the rivers dry up regularly and it is therefore necessary to take measures to improve the river ecological environment. Meanwhile, flood control is the principal function for most of the dried-up rivers, so river regulation works for flood control also should be undertaken. In this paper, some measures of river regulation were selected applied to the Haihe River basin, taking these measures not only ensure the river security but also realize its ecolog

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8

MINH CHINH, LUONG. "USING SATELLITE IMAGES TO RETRIEVE THE RIVER TURBIDITY AND WATER FLOW VELOCITY FOR MONITORING THEIR INFLUENCES ON BRIDGE SUBSTRUCTURES." Structure and Environment 15, no. 2 (2023): 63–72. http://dx.doi.org/10.30540/sae-2023-006.

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Turbidity is an important indicator of water quality in rivers, lakes, and coastal areas. Research on turbidity issues in these areas is significant not only for the development and utilization of water resources for aquaculture, tourism, and other purposes but also for assessing the level of silt (sand) in the river, allowing sediment alluvial to build up a bank of the river, and monitoring the degree of water corrosion in the bridge substructure. This allows for the building of an effective maintenance and conservation program for the bridge in response to climate change. Traditional methods

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9

Karavan, Yuliia, and Yuriy Yuschenko. "Hydromorphological features in the assessment of the ecological status of the foothills' rivers." Scientific Herald of Chernivtsi University. Geography, no. 808 (December 13, 2019): 60–67. https://doi.org/10.31861/geo.2019.808.60-67.

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The aim of the research is to show the opportunity of using the hydromorphological features of the river bed and the floodplain as the part of the assessment of the ecological state of the rivers on the foothills. Methods. The study is based on the use of the combination European approaches to the assessment of the hydromorphological elements of the river with some new ideas, proposed by the authors. Scientific novelty of the article is universality of the proposed algorithm of research actions in relation to the rivers in the same natural conditions. Practical value is determined by the devel

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10

Dahal, Kamala. "River Culture in Nepal." Nepalese Culture 14 (February 24, 2021): 1–12. http://dx.doi.org/10.3126/nc.v14i0.35187.

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Most of the world civilizations are developed in the river basins. However, we do not have too big rivers in Nepal, though Nepalese culture is closely related with water and rivers. All the sacraments from birth to the death event in Nepalese society are related with river. Rivers and ponds are the living places of Nepali gods and goddesses. Jalkanya and Jaladeviare known as the goddesses of rivers. In the same way, most of the sacred places are located at the river banks in Nepal. Varahakshetra, Bishnupaduka, Devaghat, Triveni, Muktinath and other big Tirthas lay at the riverside. Most of the

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11

Cunha, Davi G. F., Doron Grull, Murilo Damato, et al. "Contiguous urban rivers should not be necessarily submitted to the same management plan: the case of Tietê and Pinheiros Rivers (São Paulo-Brazil)." Anais da Academia Brasileira de Ciências 83, no. 4 (2011): 1465–80. http://dx.doi.org/10.1590/s0001-37652011000400032.

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The management of urban water resources plays an important role for developing countries. The Tietê and Pinheiros Rivers (São Paulo, Brazil) are affected by domestic and industrial effluents and by the diffuse pollution. This research aimed to quantify 134 variables in the water of Tietê and Pinheiros Rivers (approximately 7,200 and 6,600 analyses, respectively) from August 2007 to December 2008. The idea was to verify if the fact that both rivers are located in the same basin is enough to consider the application of a single management plan for both. Data showed that the rivers presented sign

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12

Khumbanyiwa, DD, E. Kaunda, W. Singini, WL Jere, and M. Limuwa. "Morphometric variations among Opsaridium microlepis (Günther, 1864) from Lake Malaŵi migrating to different rivers for breeding." African Journal of Food, Agriculture, Nutrition and Development 24, no. 1 (2024): 25240–63. http://dx.doi.org/10.18697/ajfand.126.23445.

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Fish is an important resource in Malawi as a source of food for the majority as it provides affordable source of dietary animal protein as well as income. A number of fish species in the Malawi water bodies have their population dwindling. One of the species under serious threat of extinction is the Opsaridium microlepis - a potamodromous fish species that migrate to the rivers during its spawning period and its management seems a nightmare. A number of studies reveal contrasting results on genetic makeup and morphological aspect of this fish species. With changes in the ecosystems of the rive

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13

Jones, Michael A., Rabab Abi-Hanna, and Kenneth Krott. "Activities for Students: Applying Secant Lines and Tangent Lines for the Optimal Placement of Range Lights." Mathematics Teacher 101, no. 9 (2008): 682–89. http://dx.doi.org/10.5951/mt.101.9.0682.

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Range lights are pairs of lighthouses on bays, rivers, and other waterways that guide boats safely along a linear path, called the range line. Because lighthouses are expensive to build, operate, and maintain, it is reasonable to minimize the number of lighthouses in use by ensuring that the range lines are as long as possible. The portion of a river that is deep enough for boat traffic is referred to as the river's channel. The channel is dredged often to ensure an appropriate depth for safe passage of boats. To keep a boat in a channel bounded by the curves y = f(x) and y = f(x) + h, the opt

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14

Goudarzi, Fatemeh, Amir Hedayatiaghmashhadi, Azadeh Kazemi, and Christine Fürst. "Optimal Location of Water Quality Monitoring Stations Using an Artificial Neural Network Modeling in the Qarah-Chay River Basin, Iran." Water 14, no. 6 (2022): 870. http://dx.doi.org/10.3390/w14060870.

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The economic development, livelihood and drinking water of millions of people in the central plateau of Iran depend on the Qarah-Chay River, but due to a lack of inappropriate monitoring, it has been exposed to destruction and pollution. Consequently, an assessment of the river’s water quality is of utmost importance for both the management of human health and the maintenance of a safe environment, which can be achieved by determining the best locations for pollution monitoring stations along rivers. In this study, artificial neural networks (ANNs) has been used to optimize the locations for Q

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15

Anna, Argyroudi, Chatzinikolaou Yorgos, Poirazidis Konstantinos, and Lazaridou Maria. "Do intermittent and ephemeral Mediterranean rivers belong to the same river type?" Aquatic Ecology 43, no. 2 (2008): 465–76. http://dx.doi.org/10.1007/s10452-008-9176-9.

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16

Hashim, Sarfraz, Yue Bo Xie, Imtiaz Hashim, and Ijaz Ahmad. "Urban River Pollution Control Based on Bacterial Technology." Applied Mechanics and Materials 692 (November 2014): 127–32. http://dx.doi.org/10.4028/www.scientific.net/amm.692.127.

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Water quality problems are the main interest in current issues. Most urban rivers are polluted due to mismanagement and non existence facilities. Fenghu and Song yong Rivers faced under the same activities. The basic purpose of this paper is to provide more detail and explanation to restore the urban river with advance, reliable and affordable new technology. This research is successfully applied on these Rivers with Bacterial technology (BT). For easier and better understanding used Canadian Water quality (CWQI 1.0) model for aquatic life. The result admitted a fast recovery of highly pollute

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17

Huang, Jian Jun, Yu Hong Li, and Ya Jie Gao. "Ferric Nitrate Suppresses Internal Phosphorus Loading in Municipal River." Advanced Materials Research 393-395 (November 2011): 1242–46. http://dx.doi.org/10.4028/www.scientific.net/amr.393-395.1242.

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The application of nitrate is an accepted procedure to manage eutrophication municipal rivers by controlling the phosphorus release from sediments into overlying water and offering electron acceptor for microorganism metabolism. In situ laboratory studies were carried out in simulated reactors to evaluate the potential of ferric nitrate for remediation municipal river sediment. Ferric nitrate could greatly improve the ability of bio-treatment properties for sediment. Two dose remediation experiment of ferric nitrate (70g and 35g per square meter) was carried out lasting 28 weeks. Observations

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18

Bravo, Sandra, Ken Whelan, Nike Ponce, and María Teresa Silva. "The cohabitation of Chinook salmon (Oncorhynchus tshawytscha) with trout populations in two important recreational fishing rivers in southern Chile." Latin American Journal of Aquatic Research 50, no. 5 (2022): 723–38. http://dx.doi.org/10.3856/vol50-issue5-fulltext-2906.

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A study was carried out on two important recreational fishing rivers in southern Chile, the Petrohué and the Puelo, to assess the population structure of the salmonid species inhabiting both rivers. Five river sectors were surveyed on four dates between April 2016 and February 2017. In the Petrohué River, 2400 fish were sampled (42.9% rainbow trout Oncorhynchus mykiss; 23.8% brown trout Salmo trutta, and 33.3% Chinook salmon Oncorhynchus tshawytscha), while in the Puelo River, 1972 fish were examined (51.6% rainbow trout; 30.4% brown trout and 18% Chinook salmon). Fry and fingerling stages acc

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19

Yuliati, Yuliati, Eni Sumiarsih, Adriman Adriman, Nurfatihayati Nurfatihayati, and Efawani Efawani. "Water Quality of a Tributary of Siak River and Reservoir in Pekanbaru City, Riau Province, Using the CCME-WQI." Depik 13, no. 2 (2024): 355–62. http://dx.doi.org/10.13170/depik.13.2.35403.

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This research was conducted on one of the Siak River tributaries that crosses the urban area in Pekanbaru, namely the Pengambang River. The Pengambang River flow is dammed to become a reservoir; one of its functions is as a source of raw drinking water. Increased activity along rivers and reservoirs certainly has an impact on water quality. The research was carried out in May-October 2023. Water sampling was taken at 3 points each along the river flow and in the Reservoir. The physicochemical water quality parameters measured include temperature, TSS, BOD, COD, DO, pH, TP, Nitrate, and Total c

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20

Wu, Ju-Ping, Fan-Yao Meng, and Huan Wang. "Urban Rivers and Corporate Environmental Performance: Evidence from Listed Companies in China." Water 17, no. 7 (2025): 1052. https://doi.org/10.3390/w17071052.

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Civilization begins with rivers, and so does pollution. Examining and deciphering the possible ecological curse effect of abundant river resources has a profound impact on sustainable economic development. This paper empirically examines the impact of urban rivers on the environmental performance of listed companies by constructing indicators of urban river length and density and measuring river resources in prefecture-level cities with a sample of listed companies in China from 2011 to 2022. It is found that the richer the urban rivers are, the lower the environmental performance of listed co

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Baumann, Paul C., Michael J. Mac, Stephen B. Smith, and John C. Harshbarger. "Tumor Frequencies in Walleye (Stizostedion vitreum) and Brown Bullhead (Ictalurus nebulosus) and Sediment Contaminants in Tributaries of the Laurentian Great Lakes." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 9 (1991): 1804–10. http://dx.doi.org/10.1139/f91-213.

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To better characterize neoplasm epizootics in the Great Lakes basin and their association with families of contaminants, we sampled five locations: the Fox and Menominee rivers, Lake Michigan; Munuscong Lake, St. Mary's River; and the Black and Cuyahoga rivers, Lake Erie. Frequencies of external and liver tumors were determined for brown bullhead (Ictalurus nebulosus) from all locations except the Black River and for walleye (Stizostedion vitreum) from the Lake Michigan and St. Mary's River sites. Sediment samples were analyzed for metals, polychlorinated aromatics, and polynuclear aromatic hy

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Mat Saad, Azlina, Fadli Fizari Abu Hassan Asari, Salwani Affandi, and Azlina Zid. "RIVER POLLUTION: A MINI REVIEW OF CAUSES AND EFFECTS." Journal of Tourism, Hospitality and Environment Management 7, no. 29 (2022): 139–51. http://dx.doi.org/10.35631/jthem.729011.

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Pollution of rivers is a serious topic that is frequently brought up by people from all walks of life all around the world including Malaysia. Domestic wastes, industrial pollutants, as well as agricultural wastes, including harmful and dangerous materials, have been discharged into the rivers directly or indirectly. The inflow of these hazardous pollutants not only pollutes river water but also sediment and aquatic life. Rivers, as we all know, are one of the contributors to the clean water supply in most parts of the world. River pollution has an impact on the availability of clean water use

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Beidyk, O., and S. Syrovets. "TOURIST AND EXCURSION RESOURCES OF DESNIANSKIY RECREATIONAL ROUTE." Bulletin of Taras Shevchenko National University of Kyiv. Geography, no. 66-67 (2017): 29–37. http://dx.doi.org/10.17721/1728-2721.2017.66.3.

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Every year river cruises are becoming more common, as river corridors have strong potential for recreation and tourism: architectural, historical and natural attractions are concentrated on their banks and in the port cities. Nevertheless major rivers have a huge resource and recreational potential as compared to small and medium-sized rivers, their tourist-recreational “luggage” is remarkably more modest. At the same time historical and national patriotic significance of small rivers sometimes is not inferior to the potential of major rivers. It’s worth noting that it is the medium and small

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24

Woodbridge, Kevin P., Saied Pirasteh, and Daniel R. Parsons. "Investigating Fold-River Interactions for Major Rivers Using a Scheme of Remotely Sensed Characteristics of River and Fold Geomorphology." Remote Sensing 11, no. 17 (2019): 2037. http://dx.doi.org/10.3390/rs11172037.

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There are frequently interactions between active folds and major rivers (mean annual water discharges > 70 m3s−1). The major river may incise across the fold, to produce a water gap across the fold, or a bevelling (or lateral planation) of the top of the fold. Alternatively, the major river may be defeated to produce a diversion of the river around the fold, with wind gaps forming across the fold in some cases, or ponding of the river behind the fold. Why a river incises or diverts is often unclear, though influential characteristics and processes have been identified. A new scheme for inve

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Schmalfuß, Lisa, Christoph Hauer, Liubov V. Yanygina, and Martin Schletterer. "Landscape Reading for Alpine Rivers: A Case Study from the river Biya." GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY 15, no. 4 (2023): 196–213. http://dx.doi.org/10.24057/2071-9388-2022-046.

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Anthropogenic stressors have altered the hydromorphological characteristics of rivers worldwide. Environmental guiding principles are essential for planning sustainable river restoration measures. The alpine river Biya, located in the Russian Altai mountains, originates from Lake Teletskoye and joins the Katun near Biysk, forming the Ob. The Biya represents a hydromorphological reference system in anthropogenically ‘least-disturbed’ condition. The presented study aimed to assess the river’s undisturbed morphology in relationship with the geological history of three different river stretches ba

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Loboda, N. S., and O. V. Smalii. "Role of tributaries in Donbas in ensuring the quality of the Siverskyi Donets river surface water." Ukrainian hydrometeorological journal, no. 24 (December 9, 2019): 64–71. http://dx.doi.org/10.31481/uhmj.24.2019.06.

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The relevance of the work consists in the need to study the water quality of the Siverskyi Donets River and its tributaries at the beginning of the 21th century, since the river is a main source of water supply in the eastern part of Ukraine. The catchment area of the Siverskyi Donets River is located in the most industrialized region of Ukraine. It is a transboundary river and its catchment is located in the territory of both Ukraine and Russia. The volume of the river's water use, if compared to its runoff volume, is the largest in Ukraine. The condition of water quality is determined by hig

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Zhao, Yinjun, Qiongying Xie, Yuan Lu, and Zhi Lee. "Scale Effect and Similarity Analysing of the Extracted River Networks Features Based on DEMs with Different Spatial Resolutions." E3S Web of Conferences 53 (2018): 03035. http://dx.doi.org/10.1051/e3sconf/20185303035.

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River networks are basic parameters in river studies and river management. Due to scale effect, most river networks are lack of certainty. We selected three leafy rivers from different climatic zone with an approximately proportional relation in basin area (1: 4.1: 19.9) to dig the scale effect and possible similarity. The result shows that the resolutions of DEM and drainage area threshold are two key parameters to extract river network features from DEM. The river lengths and densities of all extracted optimal river networks under the 6km2 threshold values decrease with the spatial resolutio

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Mykhailyk, Olha. "RIVER ECOSYSTEMS OF THE FOREST-STEP AND STEPPE: NATURAL CHARACTERISTICS AND PECULIARITIES OF URBAN DEVELOPMENT." Urban development and spatial planning, no. 83 (April 14, 2023): 200–210. http://dx.doi.org/10.32347/2076-815x.2023.83.200-210.

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Natural features of river ecosystems of forest-steppe and steppe zones are considered. The problems of anthropogenic loading of the rivers of the dissected plains and their coastal areas are indicated. Measures of urban planning organization of coastal territories of river ecosystems of forest-steppe and steppe zones are proposed. According to the type of river and the natural area of the river basin in Ukraine, there are 3 types of rivers: Polish rivers, rivers of forest-steppe and steppe zones (dismembered plains), and mountain rivers. The most common are the rivers of the dissected pl

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Smirnova, Maria V., and Anastasia I. Batanina. "Study of the role of natural and anthropogenic factors in the formation of water quality in small rivers on the example of the Veletma river in the Nizhny Novgorod region." RUDN Journal of Ecology and Life Safety 29, no. 2 (2021): 162–73. http://dx.doi.org/10.22363/2313-2310-2021-29-2-162-173.

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Small rivers of Central Russia often experience a high anthropogenic pressure, and at the same time their study and measures taken to preserve them are incomparably more modest than for large rivers. On the example of the Veletma river in the Nizhny Novgorod region, the factors affecting the formation of the water quality of the small river are considered. The ecological and geographical characteristics of the Veletma river are given. It is shown that the current methodology for assessing the water quality of large rivers by the Specific Combinatorial Water Pollution Index does not allow to de

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Scherbakova, Anna. "Mad rivers run sane?" Nature 357, no. 6378 (1992): 451–52. http://dx.doi.org/10.1038/357451a0.

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Khomenchuk, V. O., B. Z. Lyavrin та V. Z. Kurant. "МОРФОМЕТРИЧНІ ПОКАЗНИКИ ДЕЯКИХ ВИДІВ РИБ МАЛИХ РІЧОК ЗАХІДНОГО ПОДІЛЛЯ ЯК ІНДИКАТОР ЗАБРУДНЕННЯ ВОДОЙМ". Scientific Issue Ternopil Volodymyr Hnatiuk National Pedagogical University. Series: Biology 78, № 4 (2020): 35–40. http://dx.doi.org/10.25128/2078-2357.19.4.6.

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The morphometric characteristics of the most common commercial fish were studied: carp – Cyprinus carpio L., pike – Esox lucius L., crucian carp– Carassius auratus gibelio Bloch. and perch – Perca fluviatilis L., two years old, with an average mass of 290–330 g., 300–350 g., 150–230 g. and 170–230 g. respectively, caught from the small rivers of the Western Podillia (Strypa, Seret, Zolota Lypa). It was found, that the indicators of full length, standard length, head length, head height at the back of the head, the largest and smallest body height in carp, crucian carp and perch decreased linea

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Yang, Dongfang, Hong Zhu, Longlei Zhang, Qi Wang, and Haixia Li. "Spatiotemporal Variation of Pb Content Source Transportation in Jiaozhou Bay." E3S Web of Conferences 185 (2020): 02014. http://dx.doi.org/10.1051/e3sconf/202018502014.

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Based on research data of the Jiaozhou Bay waters in May, August, and October 1992, the current transportation process and the various sources of Pb contents in the Jiaozhou Bay water body were studied. According to the Yang Dongfang migration law of the content, the results show that: after the ocean current with high levels of Pb content enters the Jiaozhou Bay, spatial change process of the sources carrying Pb content in May, August and October is shown with the transportation of the ocean current. Also, the model block diagram is used to reveal the change process of Pb content imported by

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Xu, Nan, Haiyan Li, Chunyu Luo, Hongqiang Zhang, and Yi Qu. "Exploring Spatial Relationship between Restoration Suitability and Rivers for Sustainable Wetland Utilization." International Journal of Environmental Research and Public Health 19, no. 13 (2022): 8083. http://dx.doi.org/10.3390/ijerph19138083.

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Wetlands are important ecosystems for biodiversity preservation and environmental regulation. However, the integrity of wetland ecosystems has been seriously compromised and damaged due to the reckless and indiscriminate exploitation of wetland resources during economic development by human society. Hence, wetland restoration has now attracted wide attention. Understanding wetland restoration suitability and its relationship with river grade and river distance is an important step in further implementing wetland restoration and ensuring an orderly wetland development and utilization. In this s

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Ejsmont-Karabin, Jolanta, and Piotr Zieliński. "Impact of river current on the uniformity of littoral communities of Rotifera." Limnological Review 13, no. 1 (2013): 13–19. http://dx.doi.org/10.2478/limre-2013-0002.

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AbstractStudies were carried out in September 2007 at a set of stations called RIVERS located on two tributaries of the Narew River, and six stations on the tributaries of the Supraśl River. Concurrently, rotifers were sampled at nine stations of the River Rudnia (called RUDNIA). The aim of the research was the verification of the hypothesis on the uniforming effect of the river drift on rotifer communities inhabiting aquatic vegetation. The total numbers of all monogonont species inhabiting aquatic vegetation of RUDNIA and RIVERS were 83 and 107, respectively. The percentage similarity of rot

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Prowse, Terry D., and Joseph M. Culp. "Ice breakup: a neglected factor in river ecology." Canadian Journal of Civil Engineering 30, no. 1 (2003): 128–44. http://dx.doi.org/10.1139/l02-040.

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To minimize environmental impacts that may result from any engineered modifications of stream or river systems, a basic understanding of river ecology is required. Most fundamental theories of river ecology have developed largely from studies of warm-temperate and tropical streams and rivers. As these theories evolved over the last few decades, floods were recognized increasingly as dominant hydrologic events that control numerous abiotic and biotic forms and processes, both within the channel and on the adjacent riparian floodplains. Over approximately the same time frame, river-ice breakup w

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Chen, Tongfeng, and Liang Xiao. "Application of RBF and GRNN Neural Network Model in River Ecological Security Assessment—Taking the Middle and Small Rivers in Suzhou City as an Example." Sustainability 15, no. 8 (2023): 6522. http://dx.doi.org/10.3390/su15086522.

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The analytic hierarchy process is used to construct the health evaluation index system and grading standard of small- and medium-sized rivers in the region. Based on the principles of RBF and GRNN neural network algorithms, the river health evaluation models of radial basis function neural network (RBF) and general regression neural network (GRNN) algorithms are constructed, respectively. The network training samples are constructed by the interpolation method. The standard value of river health classification evaluation is taken as the “prediction” sample to “predict”. Then the results are ap

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Bahri, Syamsul, Priyo Hartanto, Anak Agung Ayu Diah Kusumadewi, Halimatusa'adiah, and Bung Ashabul Kahfi. "Comparison of Pollution Level at Jangkok River Estuary and Ancar River Estuary Using Periphyton Bioindicators." Jurnal Penelitian Pendidikan IPA 9, no. 2 (2023): 986–90. http://dx.doi.org/10.29303/jppipa.v9i2.3784.

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Water quality can be determined using various parameters such as physical, chemical and biological parameters. In this study, researchers used biological parameters, namely using periphyton organisms as bioindicators of water pollution. The aims of this study were to determine the abundance and diversity index of periphyton species in the Jangkok and Ancar rivers, to determine the periphyton species found in the Jangkok and Ancar rivers, and to determine the water quality of the Jangkok and Ancar rivers based on periphyton bioindicators. Sampling was only at the mouth/downstream of the Jangkok

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Wang, Liu Yan, You Peng Xu, and Ming Jing Yu. "River System Connectivity Analysis of Wuxi’s Central Urban Area Based on Graph Theory." Applied Mechanics and Materials 212-213 (October 2012): 543–48. http://dx.doi.org/10.4028/www.scientific.net/amm.212-213.543.

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Wuxi City is located in the hinterland of Taihu Basin and an important city in Yangtze River Delta Region with a prosperous economy. In the process of urban development, the river system pattern changes a lot. It has an impact on water environment, water ecology and other fields. The central urban area of Wuxi City was selected as the study area. Based on the river system of three periods: 1960s, 1980s and 2009, the rivers were classified into three levels according to the width of channels. The length, acreage and stream structure parameters were calculated. Then from the view of Graph Theory

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Khilchevskyi, V. K. "THE HYDROECOLOGICAL STATUS OF SMALL HISTORICAL RIVERS LYBED AND POCHAYNA IN THE BASIN OF THE DNIEPER AND VOLGA AT THE BEGINNING OF THE XXI CENTURY." Hydrology, hydrochemistry and hydroecology, no. 4 (55) (2019): 74–88. http://dx.doi.org/10.17721/2306-5680.2019.4.6.

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A survey study of the general hydroecological status of the historical small rivers of the same name Lybed and Pochayna, known since the Middle Ages (10th-11th centuries) in the Dnieper basin in Ukraine and in the Volga basin in the Russian Federation (RF), has been carried out. These rivers, many centuries ago, were natural objects around which cities formed, and in our time they turned out to be “absorbed” by cities. The state of six small rivers was analyzed: Lybed and Pochayna – tributaries of the Dnieper, Kiev, Ukraine; Lybed and Pochayna – Klyazma tributaries (Volga basin), Vladimir, Rus

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Arp, Christopher D., Jessica E. Cherry, Dana R. N. Brown, Allen C. Bondurant, and Karen L. Endres. "Observation-derived ice growth curves show patterns and trends in maximum ice thickness and safe travel duration of Alaskan lakes and rivers." Cryosphere 14, no. 11 (2020): 3595–609. http://dx.doi.org/10.5194/tc-14-3595-2020.

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Abstract. The formation, growth, and decay of freshwater ice on lakes and rivers are fundamental processes of northern regions with wide-ranging implications for socio-ecological systems. Ice thickness at the end of winter is perhaps the best integration of cold-season weather and climate, while the duration of thick and growing ice cover is a useful indicator for the winter travel and recreation season. Both maximum ice thickness (MIT) and ice travel duration (ITD) can be estimated from temperature-driven ice growth curves fit to ice thickness observations. We simulated and analyzed ice growt

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Sinaga, Martianna, Eddiwan Eddiwan, Windarti Windarti, and Nur Asiah. "GROWTH CIRCLE PATTERNS IN THE OTOLITH OF THE GRAY FISH (Osteochilus melanopleurus) FROM THE SIAK AND KAMPAR RIVERS." Asian Journal of Aquatic Sciences 4, no. 2 (2021): 144–53. http://dx.doi.org/10.31258/ajoas.4.2.144-153.

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Osteochilus melanopleurus can be found in the Siak and Kampar Rivers. The Kampar Rivers waters are better than that of the Siak River and it affects the growth of the fish. The growth pattern is reflected in the pattern of otolith growth rings. The research aims to understand the pattern of otolith growth rings of the O. melanopleurus from both rivers has been conducted from January to February 2021. There were 55 fishes captured (28 males and 27 females). The otolith was taken using tweezers and shaved manually using a soft grindstone. The dark growth ring pattern was investigated using a bin

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Purba, Jhon Sufriadi, and Jandri Fan HT Saragi. "Kajian Saluran Sungai Akibat Gesekan Limbah pada Aliran Sungai di Bantaran Sungai Kelurahan Toba, Kec. Siantar Selatan." ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) 2, no. 3 (2021): 32–39. http://dx.doi.org/10.53695/jas.v2i3.473.

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River pollution is the entry of various substances and non-biodegradable objects that result in contaminated water and loss of function. Besides being a source of various diseases, water pollution also causes flooding. Protecting the river is the same as maintaining survival in the future. Rivers have been the most important part of human life since ancient times. In human evolution, rivers and lakes played an unimaginable role. Rivers are not only important for animals and birds to live, but are also a major source of drinking water. And their environmental value, economic value, and spiritua

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Xiao, Chenguang, Jing Chen, Xianjiang Yuan, Ruidong Chen, and Xia Song. "Model Test of the Effect of River Sinuosity on Nitrogen Purification Efficiency." Water 12, no. 6 (2020): 1677. http://dx.doi.org/10.3390/w12061677.

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River pollution is a significant problem within the urbanization process in China. Nitrogen is one of the most important pollutants in rivers, and the nitrogen purification capacity of rivers can be affected by their sinuous morphology. In this study, a set of sandy circulating water test models was constructed, consisting of four river channel simulation models with sinuosities of 1.0, 1.4, 1.8, and 2.2. Each model was then infused with the same concentration of nitrogen-polluted water, which circulated for 52 h. The nitrogen reduction processes of rivers with different sinuosities were studi

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Romanova, Sophia, Elena Krupa, and Аizada Serikova. "Compounds of nitrogen and phosphorus in water bodies of the Kazakhstan part of the Irtysh River basin." Eurasian Journal of Ecology 79, no. 2 (2024): 21–31. http://dx.doi.org/10.26577/eje.2024.v79.i2-02.

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We present materials from our research to study the distribution of various forms of mineral nitrogen and phosphorus in the Irtysh River basin in the summer of 2023. It has been established that the content of mineral forms of nitrogen and their ratios are not the same in the water of rivers and lakes. In the water of the river’s tributaries. The Irtysh River was dominated by nitrate ions (from 0.039 to 1.033 mgN/dm3), with a maximum in the right-bank tributaries. The nitrite and ammonium ions share accounted for 2.7, 32.7 and 15.3, 38.3% of the total nitrogen, respectively. The share of nitra

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Kuzishchin, K. V., M. A. Gruzdeva, and A. V. Semenova. "On Widening the Hybrid Zone for Chars of Genus Salvelinus, Kundscha S. leucomaenis and Northern Dolly Varden S. malma (Salmonidae), in Rivers of Kamchatka Peninsula." Вопросы ихтиологии 63, no. 6 (2023): 704–22. http://dx.doi.org/10.31857/s0042875223060140.

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The data on widening the zone for hybridization between the chars of the genus Salvelinus, kundscha S. leucomaenis and northern dolly varden S. malma (Salmonidae), in rivers of the Kamchatka Peninsula are reported. If the hybrids between the kundscha and the northern dolly varden could be previously observed only in the Utkholok River in the northwest of the peninsula, the mass hybridization between these species have occurred in two more nearby rivers, the Kvachina and Snatolveem Rivers since 2009. A microsatellite analysis has shown that hybrid specimens are characterized by intermediate val

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Panagopoulos, Yiannis, Kostas Stefanidis, Marta Faneca Sanchez, et al. "Pan-European Calculation of Hydrologic Stress Metrics in Rivers: A First Assessment with Potential Connections to Ecological Status." Water 11, no. 4 (2019): 703. http://dx.doi.org/10.3390/w11040703.

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The hydrologic regime of a river is one of the factors determining its ecological status. This paper tries to indicate the present hydrologic stress occurring across European rivers on the basis of model integration. This results in a pan-European assessment at the resolution of the functional elementary catchment (FEC), based on simulated daily time-series of river flows from the model PCR-GLOBWB. To estimate proxies of the present hydrologic stress, two datasets of river flow were simulated under the same climate, one from a hypothetic least disturbed condition scenario and the second from t

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Zhang, Ke, Kaiyu Liu, and Jinchun Yang. "Asymmetrical valleys created by the geomorphic response of rivers to strike-slip fault." Quaternary Research 62, no. 3 (2004): 310–15. http://dx.doi.org/10.1016/j.yqres.2004.07.003.

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Offset fluvial valleys, including rivers beheaded and deflected by strike-slip faults, have long been used to estimate horizontal displacements on the faults. Larger rivers crossing such faults, however, sometimes show either no offset or only a small amount of offset compared to smaller rivers crossing the same faults. The larger rivers with higher erosional rates may widen their valleys asymmetrically downstream of strike-slip faults, rather than being beheaded or deflected. Examples are described from the Yellow River near the NE margin of the Tibetan Plateau. River beheading and asymmetric

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Chhabra, Shakuntala, Nilesh Solanki, and Vilayatkar. "Safe drinking water in remote rural communities in present era." International Journal of Scientific Reports 9, no. 8 (2023): 251–58. http://dx.doi.org/10.18203/issn.2454-2156.intjscirep20232188.

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Background: Groundwater is important source of drinking water particularly in rural communities though river, dam water too is also used globally. Many sicknesses, deaths are due to water, major media for carrying causes of illnesses. Community based study was carried out to know about drinking water sources, action before consumption by rural communities. Methods: Community based qualitative study using predesigned tool was carried out in tribal communities of 140 villages of forestry hilly region over one year with 25 women of 15 to 60 years randomly included from each village, total 4

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Fabre, Eric. "Aquatic hyphomycetes in three rivers of southwestern France. II. Spatial and temporal differences between species." Canadian Journal of Botany 76, no. 1 (1998): 107–14. http://dx.doi.org/10.1139/b97-156.

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Spatial and temporal changes in conidial concentration of species of aquatic hyphomycetes were studied in three southwestern French rivers (Adour, Nive, and Tech). The survey was conducted from source to mouth for a year by water filtration. Fifty-two species were identified. Alatospora acuminata and Clavariopsis aquatica were the most abundant species in all three rivers. Most other species made small contributions to the total amount of conidia, but species such as Heliscella stellata or Lemonniera aquatica occasionally may be important in a particular river. The timing of seasonal peaks of

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Rubaii, Kali. "This Is Why We Protect the Rivers, This Is How We Love the Rivers." Critical Times 6, no. 2 (2023): 195–201. http://dx.doi.org/10.1215/26410478-10437007.

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Abstract The Tigris and Euphrates Rivers are the sacred world-makers and life-sustainers of Iraq. At the same time, war has transformed them into toxified vectors of disease, death, and neglect. The “river protectors” (some of them identifying as activists, others not) strive to protect and repair their river ecologies from unjust destruction, even as they work under the shadow of prophecy that predicts the irreparable demise of these waterways. This essay explores how people love doomed rivers and what it means to pursue environmental repair and justice in the face of massive, irreversible ha

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