滇池流域大棚种植区面源污染模拟

Nonpoint source pollution simulation in greenhouse region of Dianchi Basin

相对于传统的露天种植,塑料大棚改变了降雨径流和土壤侵蚀过程,进而影响面源污染物的产生。为定量研究滇池流域大棚种植区的面源污染负荷情况,选择滇池东岸某示范区为研究对象,利用清华大学开发的IMPULSE模型对其暴雨径流过程进行模拟研究,估算大棚种植区的污染负荷,总结出大棚种植区暴雨径流和面源污染的基本特征。研究表明,塑料大棚有增加地表径流量和减少地表侵蚀和面源污染两方面的作用。

Compared with traditional uncovered farmland, a greenhouse region changes the runoff, erosion, and affects generation of nonpoint source pollutants. The nonpoint source pollution of greenhouse region in Dianchi Basin on the east side of the lake was simulated using the IMPULSE (integrated model of nonpoint sources pollution processes) model developed by Tsinghua University to analyze the runoff, evaluate the pollution yield, and identify the characteristic of diffuse pollution process. The results indicate that the greenhouse leads to increase the runoff while reducing erosion and pollutant generation.