小流域内的氮污染物来源模拟研究

摘要

文章采用澳大利亚源流域模型模拟东山小流域内2001年-2010年产生的降雨径流和总氮污染负荷，其中降雨径流采用SIMHYD模型，氮污染物生成采用EMC／DWC模型。通过模拟发现，流域内的水产养殖塘产生的径流量占66％，其次为高地茶果树；水产养殖和高地茶果树两种土地利用类型是流域内主要的总氮负荷来源；而单位面积上产生的最大污染负荷来自于蔬菜种植地（46ks／ha）和高地茶果树（42ks／ha）。%This article uses source catchment model to simulate rainfall runoff generation and TN load in Dongshan Peninsula though 2001 -2010. Rainfall runoff adopts SIMHYD model and pollutant generation uses EMC/DWC model. The results show that Aquaculture contributed around 66% of the average annual runoff, followed by upland fruit trees. The model suggests that the aquaculture ponds and the upland fruit trees are the main source of TN loads. It is concluded that vegetables （46 kg/ha） and upland fruit trees （42 kg/ha） contribute the highest TN load per unit area.