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首页> 外文会议>Energy and Environment Technology, 2009. ICEET '09 >The Non-point Source Pollution Simulation in the Xiangxi River Watershed of Three Gorges Reservoir Area in China Based on SWAT Model
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The Non-point Source Pollution Simulation in the Xiangxi River Watershed of Three Gorges Reservoir Area in China Based on SWAT Model

机译：基于SWAT模型的中国三峡库区湘西河流域非点源污染模拟。

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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 generally matched well with the observed values during calibration and validation (R2 Ȧ5; 0.7 and Nash-Suttcliffe Ȧ5; 0.5), This study shows that SWAT is able to predict streamflow and nutrients with satisfactory results. The results indicated that the NPS load of the Xiangxi river watershed basicly increased year by year. It increased from 8764 t in 2002a to 18838 t in 2007a and the NPS pollution were closely correlated with the temporal distribution of rainfall-runoff. Also the pollutant yields were mainly affected by the spatial distribution of slope, soil type, and land-use conditions. The subbasins with high proportion of cropland will geneate the more NPS polltion load. These understanding and analyses about characteristics of non-point source pollution are foundations of water quality management. To prevent water body from soil erosion and non-point source pollution, effective and powerful measures should be carried out in crucial period and area.
机译：一个好的数值非点源污染模型是非点源污染管理的有效工具，可用于分析污染物排放的时空规律。本文采用SWAT模型估算2002-2007年中国三峡库区湘西河流域非面源污染的贡献。由于预测值通常与校准和验证期间的观测值非常吻合（R2Ȧ5; 0.7和Nash-SuttcliffeȦ5; 0.5），所以这项研究表明，SWAT能够预测水流和养分，结果令人满意。结果表明，湘西流域的NPS负荷基本逐年增加。它从2002a的8764 t增加到2007a的18838 t，NPS污染与降雨径流的时间分布密切相关。污染物的产量也主要受到坡度，土壤类型和土地利用条件的空间分布的影响。农田比例高的子流域将产生更多的NPS污染负荷。这些对面源污染特征的理解和分析是水质管理的基础。为防止水体受到水土流失和面源污染，应在关键时期和关键地区采取有效有力的措施。

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