Empirical Study on Non-point Sources Pollution Based on Landscape Pattern & Ecological Processes Theory: A Case of Soil Water Loss on the Loess Plateau in China
基于格局-过程理论的非点源污染实证研究:以黄土丘陵沟壑区水土流失为例

Non-point sources pollution is one of main pollution modes which pollutes the earth surface environment.Aimed at soil water loss(a typical non-point sources pollution problem) on the Losses Plateau in China,the paper applied a landscape pattern evaluation method to twelve watersheds of Jinghe River Basin on the Loess Plateau by means of location-weighted landscape contrast index(LCI) and landscape slope index(LSI).The result showed that LSI of farm land,low density grass land,forest land and LCI responded significantly to soil erosion modulus and responded to depth of runoff,while the relationship between these landscape index and runoff variation index and erosion variation index were not statistically significant.This tell us LSI and LWLCI are good indicators of soil water loss and thus have big potential in non-point source pollution risk evaluation.