四川盆地紫色丘陵区小流域水土流失建模与控制方法分析

 该研究是在欧盟项目EroChiNut框架内实施的,其目的是利用不同土地利用形式、侵蚀敏感性矩阵以及土地管理和坡度研究土地管理模式对水土流失的影响。首先对不同土地管理模式进行分析以了解其对土壤流失的影响,其结果用来优化未来的土地利用方式。另外采用LISEM研究耕作方向对水土流失的影响。该研究运用23种作物和10个坡度建立侵蚀敏感性矩阵,它描述的是不同土地利用和坡度的平均土壤侵蚀强度。建立的矩阵可用于优化土地利用方式和扩大其使用范围。

Soil erosion modelling and scenario analysis for the small catchment in the purple hilly masses of Sichuan basin

This study was carried out within the framework of the EroChiNut project.The objective of this study is to carry out scenario analysis based on alternative land use and construction of a susceptibility matrix,the effect of land use and slope on erosion.First scenario analyses were carried out to get more insight in the effect of land use on erosion.The results of these scenarios were used to define alternative land use for further analyses.At last a tillage direction was defined for all cultivated land to study the effect of tillage direction on erosion using LISEM.A susceptibility matrix was constructed,what gives the average soil loss under different kinds of land use and slope.This was done for 23 crops and 10 different slope angles.This matrix can be used for defining alternative land use.The matrix can also used for up-scaling to a larger area.