基于GIS的区域水土流失评价模型

区域水土流失评价对于水土流失区域治理的宏观决策、规划等具有十分重要的意义 .本文以黄土高原地区为例 ,结合影响水土流失的各个因子 ,分析了该区的自然特征 ,确定了进行区域水土流失评价的各项指标 (模型参数 ) ,并运用 GIS,集成了多种来源、多种比尺和多种类型的数据 ,建立了该区的水土流失宏观定量评价模型

The regional soil and water loss study is very significant to decision making and planing of regional soil and water loss control. In this paper, taking the Loess Plateau of China as a sample region, all the factors which are related to the soil and water loss are analyzed; the assessment indices (model parameters) are defined; and the data with different origins are integrated using GIS; finally, the soil loss model for this region is set up.