scholarly journals Risk assessment of non-point source pollution output in Nansihu Lake Basin based on LUCC

2019 ◽  
Vol 34 (1) ◽  
pp. 128
Author(s):  
Yan-de JING ◽  
Hua-mei ZHANG
Keyword(s):  
Risk Assessment ◽  
Point Source ◽  
Lake Basin ◽  
Point Source Pollution ◽  
Nansihu Lake ◽  
Non Point Source Pollution

Study on the Risk Pattern of Non-Point Source Pollution Using GIS Technology in the Dianchi Lake Watershed

2011 ◽  
Vol 356-360 ◽  
pp. 771-776
Author(s):  
Cheng Wu ◽  
Guo Chun Deng ◽  
Yan Li ◽  
Zhi Ying Li ◽  
Shu Hua Yang
Keyword(s):  
High Risk ◽  
Point Source ◽  
Evaluation System ◽  
Pollutant Removal ◽  
Assessment System ◽  
Dianchi Lake ◽  
Lake Basin ◽  
Point Source Pollution ◽  
Risk Pattern ◽  
Non Point Source Pollution

A rapid quantitative risk evaluation system of non-point source pollution (NPSP), based on comprehensive consideration of various factors such as topographic features, land use construction, annual mean precipitation, soil erosion characteristics and pollutant removal cost, was constructed using an Spatial Analysis Module of GIS on watershed scale. We investigated the risk pattern of NPSP in the Dianchi Lake Watershed using the rapid risk assessment system. The results indicated that NPSP risk pattern showed the arc or normal distribution trend in the Dianchi Lake Basin, namely the medium risk area of NPSP is the largest (about 1311 km2). Moreover, the spatial difference of high risk NPSP pattern is remarkable: the high risk region for NPSP was primarily in the 10 km range of the southern and eastern parts and the 5 km range of western part around the Dianchi Lake.

scholarly journals Discussion on Role of Forest to Control Agricultural Non-Point Source Pollution in Taihu Lake Basin-Based on Source-Sink Analysis

2009 ◽  
Vol 01 (05) ◽  
pp. 345-350 ◽  
Author(s):  
Jianfeng ZHANG ◽  
Jingmin JIANG ◽  
Zhijian ZHANG ◽  
Qihua SHAN ◽  
Guangcai CHEN ◽  
...  
Keyword(s):  
Point Source ◽  
Taihu Lake ◽  
Lake Basin ◽  
Point Source Pollution ◽  
Taihu Lake Basin ◽  
Source Sink ◽  
Non Point Source Pollution

scholarly journals Integrating Ecological Restoration of Agricultural Non-Point Source Pollution in Poyang Lake Basin in China

Water ◽  
2017 ◽  
Vol 9 (10) ◽  
pp. 745 ◽  
Author(s):  
Shuo Cai ◽  
Hong Shi ◽  
Xiaohua Pan ◽  
Fangping Liu ◽  
Yuanlai Cui ◽  
...  
Keyword(s):  
Point Source ◽  
Ecological Restoration ◽  
Poyang Lake ◽  
Lake Basin ◽  
Point Source Pollution ◽  
Poyang Lake Basin ◽  
Non Point Source Pollution

scholarly journals Water Resource Risk Assessment Based on Non-Point Source Pollution

Water ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 1907
Author(s):  
Xiaodie Yuan ◽  
Zhang Jun
Keyword(s):  
Risk Assessment ◽  
Soil Loss ◽  
Lake Basin ◽  
Point Source Pollution ◽  
Nitrogen And Phosphorus ◽  
Factors Affecting ◽  
Pollution Risk ◽  
Nps Pollution ◽  
Phosphorus Loads ◽  
Non Point Source Pollution

As one of the most important causes of water quality deterioration, NPS (non-point source) pollution has become an urgent environmental and livelihood issue. To date, there have been only a few studies focusing on NPS pollution conforming to the estimation, and the pollution sources are mainly concentrated in nitrogen and phosphorus nutrients. Unlike studies that only consider the intensity of nitrogen and phosphorus loads, the NPS pollution risk for the China’s Fuxian Lake Basin was evaluated in this study by using IECM (Improve Export Coefficient Model) and RUSLE (Revised Universal Soil Loss Equation) models to estimate nitrogen and phosphorus loads and soil loss and by using a multi-factor NPS pollution risk assessment index established on the basis of the data mentioned above. First, the results showed that the load intensity of nitrogen and phosphorus pollution in the Fuxian Lake Basin is low, so agricultural production and life are important sources of pollution. Second, the soil loss degree of erosion in the Fuxian Lake is mild, so topography is one of the most important factors affecting soil erosion. Third, the risk of NPS pollution in the Fuxian Lake Basin is at a medium level and its spatial distribution characteristics are similar to the intensity characteristics of nitrogen and phosphorus loss. Nitrogen, phosphorus, sediment, and mean concentrations are important factors affecting NPS pollution. These factors involve both natural and man-made environments. Therefore, it is necessary to comprehensively consider the factors affecting NPS in order to assess the NPS risk more accurately, as well as to better solve the problem of ecological pollution of water resources and to allow environmental restoration.

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