基于GIS的潘家口水库面源污染负荷计算

Calculation of non-point source pollution loadings for the Panjiakou reservoir based on GIS

潘家口水库是海河流域的重要水源地 ,在水资源匮乏的北方地区 ,水源地的保护有非常重要的意义。本文内容是海河流域重要水源地富营养化防治研究的一部分 ,利用SWAT模型研究了潘家口水库上游地区面源污染负荷和产出特征。SWAT模型是一个物理分布式的流域面源污染计算模型 ,AvSwat是ArcView软件的一个扩展模块 ,可以处理SWAT模型需要的GIS数据。文中利用实测数据对模型进行了参数率定 ,对不同水平年进行了面源污染负荷计算 。

The Panjiakou reservoir is an important water source in the Haihe basin. It is very crucial to protest the water source because of the limited water resources in the North China. This study is a part of the study on the prevention of the eutrophication in the important water source in Haihe basin. SWAT model is used to simulate the production and transportation of the non point source pollutants in the upstream watershed of the Panjiakou reservior. SWAT model is a distributive physical model in watershed scale to study the non point source pollution problem and AvSwat is an ArcView extension to process GIS data for the model. In the study, SWAT model is calibrated with observed data. Then the non point source pollution load are calculated for wet year, normal year and dry year respectively. And the impact of fertilizing on the non point source pollutant load is analyzed.