A Review of Distributed Model for Soil Erosion and Sediment Yield

With the development of computer and GIS,distributed model for soil erosion and sediment yield has become the developing direction in the field of soil erosion.This paper discussed the technical route and realization of distributed model based on the analysis of the main distributed models home and abroad at present.Finally,the paper indicated some problems of the distributed models for soil erosion and sediment yield in our country:(1) there are many problems in the developing of distributed models for soil erosion and sediment yield which are based on the distributed hydrological models,although the latter provides many references for study of the former;(2) the distributed models for soil erosion and sediment yield are mainly based on the loess plateau and the models are regional at present in our county;(3) most relational expressions of soil erosion and sediment are mainly empirical and the process of soil influx is simply beginning to be considered nowadays;(4) the spatial and temporal change of single rain event was ignored in most distributed models for soil erosion and sediment yield at present.In the future,the above problems should be solved in the constructing of distributed model for soil erosion and sediment yield in our country.