中文摘要：

为了全面了解美国中部Illinois州具有浅层排水系统的轮作农业地区面源污染问题，利用ArcGIS 和ArcSWAT等地理信息系统和面源污染模拟模型，对LittleVermillionRiver流域的地表径流水质进行了模拟，同时对各污染控制措施的控制效果进行了模拟对比。结果表明，过滤带对面源污染的控制效果要优于湿地，其对硝酸盐的去除率可达到10％左右，而对无机磷的去除率更是达到了80％左右，其对污染物的去除率与其设置面积有关；过滤带与湿地联用的净化效果较两者单独应用时要高，能够去除36．30％的总氮和93．04％的总磷。

英文摘要：

In order to get a full understanding of non-point source pollution problem in crop rota- tion agricultural areas of Illinois in the central United States, ArcGIS and ArcSWAT as geographic infor- mation system and non-point source pollution simulation model, were used to simulate the water quality of the Little Vermilion River watershed. At the same time, the pollution control effects of filter strips and wetland method were compared. The results showed that the efficiency of filter strips was higher than that of wetland. The removal rates of nitrate and inorganic phosphorus by filter strips were 10% and 80% re- spectively, and they related to the area of the filter strip. The combination of wetlands and filter strips could remove TN and TP by 36.30% and 93.04% respectivly, and the efficiency of the combination was higher than that of single