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This study was undertaken in Danjiangkou reservoir and the upper reaches, where the SWAT model was used to analyze the space distribution of non-point source pollution. The land-use pattern was interpreted by Environment for Visualizing Images Software (ENVI). The runoff and the sediment data series from 2001 to 2006 were collected to calibrate the parameters and validate the model. The calculated...
This paper investigated the spatial-temporal variations and pollution source of surface water quality by analyzing the data from 8 water quality monitoring stations along the middle and lower reaches of the Min River between 2003 and 2008. The results showed that surface water quality was worse in the middle reaches of the Min River than that in the lower reaches and its tributary. Seasonal and spatial...
Soil and water loss is an important source of water eutrophication. In this study, soil erosion were measured in the four types of cultivated lands (Paddy land, Terraced farmland, Sloping farmlands <; 25°, and Sloping farmlands ≥ 25°) in Xiaojiang River basin, Chongqing of China. In addition, water qualities were investigated in 5 reaches of Xiaojiang River (Qukou, Yanglu, Gaoyang, Huangshi, and...
Water pollution in Taihu Lake has become one of the most serious environmental problems that draws public attention and needs to be solved as soon as possible. It was well known that forest could play an important role to control soil & water erosion, uptake extra soil nutrients as well. However forest coverage is rather low and woodlands are extensively managed in the headwaters region. Thus...
The quarry and damaged mountain in peri-urban have an important influence to ecological environment. They have had a series of serious environmental-geological problems to the socio-economic development and urban modernization process, such as increased environmental pollution and soil erosion, destruction of landscape aesthetic, induced geological disasters, and had an impact on groundwater seepage...
Rainstorms can flush large amounts of nonpoint source (NPS) pollution from land sources into water bodies, threatening water supply. On the basis of rainfall events monitoring data, the runoff NPS pollution dynamics were assessed and NPS pollution loads were quantified in the Shaojiagou Stream, a tributary of Shitoukoumen Reservoir. Based on two complete rainfall events data, the average NPS pollution...
A good numerical non-point source pollution model is an efficient tool for non-point source pollution management, which can be used to analyze the temporal and spatial rules of pollutant discharge. In this paper, SWAT model is adopted to estimate the contribution of non-point source pollution in the Xiangxi River watershed of Three Gorges Reservoir Area in China in 2002-2007a. With the predicted values...
Adsorptive non-point source pollution associated with soil erosion has brought big problems to water environment and land productivity. As the most important water source area of Hainan, the Songtao Reservoir Basin (SRB) has faced with a crisis of water contamination caused by land exploitation. The objectives of this study are: (1) to assess the soil erosion risk and adsorptive non-point source pollution...
The agriculture around Taihu Lake is highly developed, but a large amount of sand and organic matter is directly brought into Taihu Lake from farmland in rainy season and is seriously polluting the water quality of the lake. In order to make a quantitative analysis for the influence of organic matter to the water body of Taihu Lake, the area around Taihu Lake is divided into two land area of paddy...
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