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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Arc GIS和Arc SWAT等地理信息系统和面源污染模拟模型,对Little Vermillion River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。
In order to fully understand the non-point source pollution in the rotation agricultural areas with shallow drainage system in Illinois, Central America, the surface runoff quality in the Little Vermillion River basin was analyzed using the Geographic Information System (ArcGIS), Arc SWAT and non-point source pollution simulation models Simulations, at the same time, the control effects of pollution control measures were simulated and compared. The results show that the control effect of the filter belt on the non-point source pollution is better than that of the wetland, and the removal rate of nitrate can reach about 10%, while the removal rate of inorganic phosphorus reaches about 80%, and the removal of pollutants The rate of decontamination is related to the area of the decontamination tank. The decontamination efficiency of the decontamination belt and wetland is higher than that of the two dehumidifiers alone, which can remove 36.30% of total nitrogen and 93.04% of total phosphorus.