Water quality and non-point sources of risk: the Jiulong River Watershed, P. R. of China

2012 ◽  
Vol 65 (1) ◽  
pp. 38-45 ◽  
Author(s):  
Jingjing Zhang ◽  
Luoping Zhang ◽  
Paolo F. Ricci
Keyword(s):  
Water Quality ◽  
Statistical Methods ◽  
Point Sources ◽  
The West ◽  
Jiulong River ◽  
River Watershed ◽  
Coupled Equations ◽  
River Region ◽  
Jiulong River Watershed ◽  
The Impact

Retrospective water quality assessment plays an essential role in identifying trends and causal associations between exposures and risks, thus it can be a guide for water resources management. We have developed empirical relationships between several time-varying social and economic factors of economic development, water quality variables such as nitrate-nitrogen, CODMn, BOD5, and DO, in the Jiulong River Watershed and its main tributary, the West River. Our analyses used alternative statistical methods to reduce the dimensionality of the analysis first and then strengthen the study's causal associations. The statistical methods included: factor analysis (FA), trend analysis, Monte Carlo/bootstrap simulations, robust regressions and a coupled equations model, integrated into a framework that allows an investigation and resolution of the issues that may affect the estimated results. After resolving these, we found that the concentrations of nitrogen compounds increased over time in the West River region, and that fertilizer used in agricultural fruit crops was the main risk with regard to nitrogen pollution. The relationships we developed can identify hazards and explain the impact of sources of different types of pollution, such as urbanization, and agriculture.

Evaluation of nitrogen balance on pig/crop farm systems in Jiulong River watershed, China

2006 ◽  
Vol 9 (1) ◽  
pp. 21-26 ◽  
Author(s):  
Yue Zeng ◽  
Hua-Sheng Hong ◽  
Wen-Zhi Cao ◽  
Neng-Wang Chen ◽  
Wei-Ping Wang ◽  
...  
Keyword(s):  
Nitrogen Balance ◽  
Jiulong River ◽  
River Watershed ◽  
Farm Systems ◽  
Jiulong River Watershed

Water quality simulation of sewage impacts on the west coast of Mumbai, India

2010 ◽  
Vol 62 (2) ◽  
pp. 279-287 ◽  
Author(s):  
R. Vijay ◽  
P. J. Khobragade ◽  
R. A. Sohony
Keyword(s):  
Water Quality ◽  
West Coast ◽  
Current Data ◽  
The West ◽  
Water Quality Simulation ◽  
Hydrodynamic Behaviour ◽  
Treated Effluent ◽  
Treatment Facilities ◽  
The Impact

Most coastal cities use the ocean as a site of waste disposal where pollutant loading degrades the quality of coastal waters. Presently, the west coast of Mumbai receives partially treated effluent from wastewater treatment facilities through ocean outfalls and discharges into creeks as well as wastewater/sewage from various open drains and nallahs which affect the water quality of creek and coastal water. Therefore, the objective of this paper is to simulate and assess the hydrodynamic behaviour and water quality due to impact of sewage and wastewater discharges from the west coast of Mumbai. Hydrodynamics and water quality were simulated based on present conditions and validated by using measured tide, current data and observed DO, BOD and FC. Observed and simulated results indicated non compliance to standards in Malad, Mahim creeks and the impact zones of ocean outfalls. The developed model could be used for generating various conditions of hydrodynamics and water quality considering the improvement in wastewater collection systems, treatment levels and proper disposal for proper planning and management of creeks and coastal environment.

scholarly journals Validation of an agricultural non-point source (AGNPS) pollution model for a catchment in the Jiulong River watershed, China

2008 ◽  
Vol 20 (5) ◽  
pp. 599-606 ◽  
Author(s):  
Jianchang LIU ◽  
Luoping ZHANG ◽  
Yuzhen ZHANG ◽  
Huasheng HONG ◽  
Hongbing DENG
Keyword(s):  
Point Source ◽  
Jiulong River ◽  
River Watershed ◽  
Jiulong River Watershed

Modelling the cost-effective solutions of nitrogen reduction in Jiulong River Watershed, China

2015 ◽  
Vol 166 ◽  
pp. 218-229 ◽  
Author(s):  
Hao Kong ◽  
Hui Lin ◽  
Benrong Peng ◽  
Nenwang Chen ◽  
Chenchen Lin ◽  
...  
Keyword(s):  
Cost Effective ◽  
Jiulong River ◽  
Nitrogen Reduction ◽  
River Watershed ◽  
Jiulong River Watershed ◽  
The Cost

Empirical appraisal of Jiulong River Watershed Management Program

2013 ◽  
Vol 81 ◽  
pp. 77-89 ◽  
Author(s):  
Benrong Peng ◽  
Nengwang Chen ◽  
Hui Lin ◽  
Huasheng Hong
Keyword(s):  
Watershed Management ◽  
Management Program ◽  
Jiulong River ◽  
River Watershed ◽  
Jiulong River Watershed

scholarly journals Continuous Simulation of Highly Urbanized Watershed to Quantify Nutrients’ Loadings

Water ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 2910
Author(s):  
Naila Mahdi ◽  
Krishna R. Pagilla
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Urban Land ◽  
Point Sources ◽  
Land Uses ◽  
River Watershed ◽  
Water Quality Simulation ◽  
Continuous Simulation ◽  
Nutrient Loadings ◽  
Chicago River

The United States has witnessed various extreme land use changes over the years. These changes led to alterations in watersheds’ characteristics, impacting their water quality and quantity. To quantify this impact in highly urbanized watersheds such as the Chicago Metropolitan Area, it is crucial to examine the characteristics and imperviousness distribution of urban land uses and available point and non-point sources. In this paper, the effect of urban runoff and nutrient loadings to water bodies in the Chicago River Watershed resulting from level (III) detailed urban land uses is investigated. A watershed scale hydrologic and water quality simulation using BASINS/HSPF model was developed for the highly urbanized watershed. Appropriate considerations were given to the effective impervious area (EIA). The results from the five-year calibrated water quality simulation were reasonably reflected with observed data in the study area and nutrient loadings of both point and non-point sources for 44 different land uses were found. The export coefficients (EC) values obtained are site-specific depending on conditions and variables at the watershed level such as physical characteristics, land use management practices, hydro-meteorological and topographical data, while using a continuous simulation approach and watershed perspective analysis. This is the first attempt to measure and model nutrients’ loadings using detailed land use types in the Chicago River Watershed. The proposed continuous calibrated and validated model can be used in the investigation and analysis of different scenarios and possible future conditions and land utilization.

scholarly journals Impacts of drought on the quality of surface water of the basin

2013 ◽  
Vol 10 (11) ◽  
pp. 14463-14493
Author(s):  
B. B. Huang ◽  
D. H. Yan ◽  
H. Wang ◽  
B. F. Cheng ◽  
X. H. Cui
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Point Source ◽  
Surface Water Quality ◽  
Point Sources ◽  
Point Source Pollution ◽  
Drought And Flood ◽  
The Impact ◽  
Non Point Source Pollution

Abstract. Under the background of climate change and human's activities, there has been presenting an increase both in the frequency of droughts and the range of their impacts. Droughts may give rise to a series of resources, environmental and ecological effects, i.e. water shortage, water quality deterioration as well as the decrease in the diversity of aquatic organisms. This paper, above all, identifies the impact mechanism of drought on the surface water quality of the basin, and then systematically studies the laws of generation, transfer, transformation and degradation of pollutants during the drought, finding out that the alternating droughts and floods stage is the critical period during which the surface water quality is affected. Secondly, through employing indoor orthogonality experiments, serving drought degree, rainfall intensity and rainfall duration as the main elements and designing various scenario models, the study inspects the effects of various factors on the nitrogen loss in soil as well as the loss of non-point sources pollution and the leaching rate of nitrogen under the different alternating scenarios of drought and flood. It comes to the conclusion that the various factors and the loss of non-point source pollution are positively correlated, and under the alternating scenarios of drought and flood, there is an exacerbation in the loss of ammonium nitrogen and nitrate nitrogen in soil, which generates the transfer and transformation mechanisms of non-point source pollution from a micro level. Finally, by employing the data of Nenjiang river basin, the paper assesses the impacts of drought on the surface water quality from a macro level.

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