基于GIS黄土高原土壤侵蚀因子的厘定

Appraisal of Soil Erosion Factors on Chinese Loess Plateau Based on GIS

以ARC/INFO为平台,构建黄土高原自然侵蚀因素和人为侵蚀因子数据库,通过对研究区合理的网格单元划分,利用GIS空间分析功能,提取各网格单元自然社会侵蚀变量,经过数据的预处理,整合各单元侵蚀因子,建立侵蚀与侵蚀因子定量模型,提炼主导侵蚀因素,度量主要侵蚀因素对侵蚀的贡献。

Soil erosion on the Chinese Loess Plateau is known for its severity in the world. This not only inherited and developed from ancient erosion, but also was controlled by natural and social erosion factors. In this paper involving natural and social erosion factors have been collected to establish the database. After suitable grid cells are demarked, the natural and social erosion variables are taken out with the help of GIS spatial functions. They are integrated to set up the erosion model to appraise all erosion factors when they are preprocessed.