scholarly journals A Coupled Modeling Approach for Water Management in a River–Reservoir System

2019 ◽  
Vol 16 (16) ◽  
pp. 2949 ◽  
Author(s):  
Zhenyu Zhang ◽  
Jinliang Huang ◽  
Min Zhou ◽  
Yaling Huang ◽  
Yimin Lu
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Water Resource Management ◽  
Water Movement ◽  
Hydrodynamic Characteristics ◽  
Watershed Model ◽  
Coupled Modeling ◽  
Reservoir System ◽  
Modeling Approach ◽  
River Reservoir

A coupled model is an effective tool to understand the nutrient fate associated with hydrodynamic and ecosystem processes and thereby developing a water resource management strategy. This paper presents a coupled modeling approach that consists of a watershed model and a hydrodynamic model to evaluate the nutrient fate in a river–reservoir system. The results obtained from the model showed a good agreement with field observations. The results revealed that the Shuikou reservoir (Fuzhou, China)exhibited complicated hydrodynamic characteristics, which may induce the pattern of nutrient export. Reservoirs can greatly lower water quality as a result of decreasing water movement. Three scenarios were analyzed for water management. The NH3-N (Ammonia Nitrogen) decreased sharply in the outlet of Shuikou reservoir after NH3-N level in its tributary was reduced. After removing the farming cages, the water quality of the outlet of Shuikou reservoir was improved significantly. The DO (Dissolved Oxygen) had increased by 3%–10%, NH3-N had reduced by 5%–17%, and TP (Total Phosphorus) had reduced by 6%–21%. This study demonstrates that the proposed coupled modeling approach can effectively characterize waterway risks for water management in such a river–reservoir system.

Traditional qanat related jurisprudence in Algeria

2014 ◽  
Vol 14 (6) ◽  
pp. 1142-1149 ◽  
Author(s):  
Nadjat Aroua
Keyword(s):  
Public Health ◽  
Water Management ◽  
Water Quality ◽  
Water Resource Management ◽  
Sustainable Water Management ◽  
Spatial Concept ◽  
Water Legislation ◽  
Current Water ◽  
Specific Culture ◽  
Management Issues

The purpose of this paper is to present an investigation on the relevance of the historical water legislation which would adapt to the modern sustainable water management. It is mainly based on the book by Ernest Feline related to the qanat system in the arid M'Zab valley in southern Algeria. It also refers to some related lectures on the traditional water legislation in the Sahara region and more generally on the Islamic water jurisprudence which does reveal a specific culture perpetuated through a relevant adaptation of al-hisba principles. Subsequently the present paper argues that if updated and adapted, the traditional knowledge can serve current water management issues within the framework of the water sensitive urbanism associated with the integrated water resource management. With this respect the spatial concept called ‘harim al-ma’ and the traditional community actions towards the qanat system can contribute to protecting water quality and improving public health.

scholarly journals The Ex-Post Economic Evaluation of Water Resource Management in South Korea: Meta-Regression Analysis

2018 ◽  
Author(s):  
Hyun No Kim ◽  
SoEun Ahn
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Regression Analysis ◽  
Resource Management ◽  
South Korea ◽  
Water Resource ◽  
Water Resource Management ◽  
Ex Post ◽  
Meta Regression ◽  
Meta Regression Analysis

Water management can improve the quality of valuable ecosystem services but can be costly to implement and the management costs are covered by national taxes collected by water users. Based on 30 valuation studies of water quality improvement from the Environmental Valuation Information System (EVIS) database provided by Korea Environment Institute (KEI), a meta-regression analysis was employed to measure the benefits that major river basins provided to the society. We compare these benefits to the costs, namely River Management Funds (RMFs) which are financial resources to support a variety of projects for managing and improving upstream water quality. Based on benefit-cost comparison, this study evaluates the efficiency of water resource management in South Korea. This study also provides policy options that are helpful to maintain the sustainability of water resource by improving the planning and performance of water management in the long run.

scholarly journals Determination of Changes in the Quality of Surface Water in the River—Reservoir System

2021 ◽  
Vol 13 (6) ◽  
pp. 3457
Author(s):  
Łukasz Gruss ◽  
Mirosław Wiatkowski ◽  
Krzysztof Pulikowski ◽  
Andrzej Kłos
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Statistical Analysis ◽  
Surface Water ◽  
Multivariate Statistical Analysis ◽  
Quality Data ◽  
Multivariate Statistical ◽  
Reservoir System ◽  
River Reservoir ◽  
Quality Profile

Assessing the changing parameters of water quality at different points in the river–reservoir system can help prevent river pollution and implement remedial policies. It is also crucial in modeling water resources. Multivariate statistical analysis is useful for the analysis of changes in surface water quality. It helps to identify indicators that may be responsible for the eutrophication process of a reservoir. Additionally, the analysis of the water quality profile and the water quality index (WQI) is useful in assessing water pollution. These tools can support and verify the results of a multivariate statistical analysis. In this study, changes in water quality parameters of the Turawa reservoir (TR), and the Mała Panew river at the point below the Turawa reservoir (bTR) and above the Turawa reservoir (aTR), were analyzed. The analyzed period was from 2019 to 2020 (360 samples were analyzed). It was found that TN, NO2-N, and NO3-N decreased after passing through the Turawa reservoir. Nevertheless, principal component analysis (PCA) and redundancy analysis (RDA) showed that NO2-N and NO3-N contribute to the observed variability of the water quality in the river-reservoir system. PCA showed that pH and PO4-P had a lower impact on the water quality in the reservoir than nitrogen compounds. Additionally, RDA proved that the values of the NO3-N and NO2-N indicators obtained the highest values at the aTR point, PO4-P at the bTR, and pH at the TR. This allows the conclusion that the Turawa reservoir reduced the concentration of NO2-N and NO3-N in comparison with the concentration of these compounds flowing into the reservoir. PCA and RDA showed that both parameters (NO2-N and NO3-N) may be responsible for the eutrophication process of the Turawa reservoir. The analysis of short-term changes in water quality data may reveal additional sources of water pollution. High temperatures and alkaline reaction may cause the release of nitrogen and phosphorus compounds from sediments, which indicates an increased concentration of TP, PO4-P, and Norg in the waters at the TR point, and TP, PO4-P, and NH4-N concentrations at the bTR point. The water quality profile combined with PCA and RDA allows more effective monitoring for the needs of water management in the reservoir catchment area. The analyzed WQI for water below the reservoir (bTR) was lower than that of the reservoir water (TR), which indicates an improvement in water after passing through the reservoir.

scholarly journals Modeling the Physical Nexus across Water Supply, Wastewater Management and Hydropower Generation Sectors in River–Reservoir Systems

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 822 ◽  
Author(s):  
Dedi Liu ◽  
Jiayu Zhang ◽  
Yujie Zeng ◽  
Youjiang Shen
Keyword(s):  
Water Quality ◽  
Boundary Conditions ◽  
Water Supply ◽  
Water Inflow ◽  
Wastewater Management ◽  
Hydropower Generation ◽  
Reservoir System ◽  
River Reservoir ◽  
Protection And Utilization ◽  
Wastewater Pollutants

Most water supply and hydropower generation is obtained from the river–reservoir system, and wastewater pollutants are also dumped into the system. Increasing water demand and consumption have caused the water supply, wastewater pollutant management and hydropower generation sectors to be interlinked and to reinforce each other in the system. A physical nexus across water supply, wastewater management and hydropower generation sectors for a river–reservoir system was developed based on the analytical water quality and hydropower generation equations. Considering the Jinghong hydropower reservoir, located in the middle and lower reaches of the Lancangjiang River Basin, as a case study, both the wastewater pollutant management target and water inflow from the upstream as the external and boundary conditions, were employed to establish the effects of the external and boundary conditions on the nexus. It was demonstrated that the nexus of water supply and hydropower generation sectors does not vary with the water quality indicators and its protection target, without the separation of environmental flow in hydropower generation flow. In addition, the amount of hydropower generation decreases with increasing water supply. However, the lapse rates of allowable wastewater pollutants–water supply differ based on the water inflow and the wastewater pollutant management sectors, while the efficiency of hydropower generation and the sensitivity of allowable wastewater pollutants per amount of water supply are considered to be unrelated to the water inflow and wastewater pollutant management target conditions. The quantitative nexus developed through the proposed equation not only contributes to a more complete understanding of the mechanism of cross-connections, but also in creation of specific water protection and utilization measures, which is also the focus of the water–energy nexus.

scholarly journals Response of bacterial communities to variation in water quality and physicochemical conditions in a river-reservoir system

2021 ◽  
Vol 27 ◽  
pp. e01541
Author(s):  
Jingting Wang ◽  
Hanbing Fan ◽  
Xiaojia He ◽  
Fangbo Zhang ◽  
Jianbo Xiao ◽  
...  
Keyword(s):  
Water Quality ◽  
Bacterial Communities ◽  
Reservoir System ◽  
Physicochemical Conditions ◽  
River Reservoir

Spatio-temporal Variations in Water Quality Parameter Trends in River Waters

2018 ◽  
Vol 69 (10) ◽  
pp. 2940-2952 ◽  
Author(s):  
Martina Zelenakova ◽  
Pavol Purcz ◽  
Radu Daniel Pintilii ◽  
Peter Blistan ◽  
Petr Hlustik ◽  
...  
Keyword(s):  
Water Quality ◽  
Chemical Oxygen Demand ◽  
Quality Indicators ◽  
Water Resource Management ◽  
Oxygen Demand ◽  
Temporal Variations ◽  
Water Quality Parameter ◽  
Agricultural Activity ◽  
Water Quality Indicators ◽  
Nitrite Nitrogen

Evaluating trends in water quality indicators is a crucial issue in integrated water resource management in any country. In this study eight chemical and physical water quality indicators were analysed in seven river profiles in the River Laborec in eastern Slovakia. The analysed water quality parameters were biochemical oxygen demand (BOD5), chemical oxygen demand (CODCr), pH, temperature (t), ammonium nitrogen (NH4+-N), nitrite nitrogen (NO2--N), nitrate nitrogen (NO3--N), and total phosphorus (TP). Data from the monitored indicators were provided by the Ko�ice branch of the Slovakian Water Management Company, over a period of 15 years from 1999 to 2013. Mann�Kendall non-parametric statistical test was used for the trend analysis. Biochemical and chemical oxygen demand, ammonium and nitrite nitrogen content exhibit decreasing trends in the River Laborec. Decreasing agricultural activity in the area has had a significant impact on the trends in these parameters. However, NO2--N was the significant parameter of water quality because it mostly exceeds the limit value set in Slovak legislation, Regulation No. 269/2010 Coll. In addition, water temperature revealed an increasing trend which could be caused by global increase in air temperature. These results indicate that human activity significantly impacts the water quality.

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