【摘要】 为合理估算太湖流域非点源污染营养盐输出负荷,通过GIS空间分析能力,构建半分布式的输出系数模型,进而测算出太湖流域营养盐输出负荷。结果显示太湖流域总氮面源污染负荷为39.81万t/年,总磷面源污染负荷为5.59万t/年。太湖流域5分区中总氮、总磷面源污染负荷依次为北部污染控制区>浙西污染控制区>西部污染控制区>南部污染控制区>东部污染控制区。更多还原

【Abstract】 It is very important to estimate the nutrient export loads from watershed,which is beneficial to management of water environment. These estimation results showed that: the total nitrogen load of non-point source pollution in Taihu lake watershed is 398 100 tons /a,the total phosphorus load is 55 900 tons /year.The total nitrogen,total phosphorus loads of non-point source pollution in the five areas are in the order of: the north pollution area>the west Zhejiang pollution area>the west pollution area>the south pollution area>the east pollution area.Moreover,the total nitrogen pollution mainly comes from the cultivated land,the total phosphorus pollution mainly comes from the land for construction purposes.更多还原