基于MAPGIS水土流失控制因素分析——以民和地区为例

Analysis of the Factor Affecting the Water and Soil Loss MAPGIS

根据民和地区黄土水土流失的实际情况,选择3个控制因素：地层岩性、地形地貌特征、水系网络,应用MAPGIS进行分析。得出：第四系水土流失是控制性水土流失;坡度在30~39°的区间发生水土流失的风险性最大;水系网络与水土流失关系密切,在其缓冲区内部水土流失总数占总水土流失数目的69.5%。

Based on the fact of water and soil loss in Min He area,in the article three facts such as stratum lithology,character of landform physiognomy,meshwork of water system were slected in the analysis of MAPGIS.The results indicated that：firstly,quaternary water and soil loss was controlling;secondly,the most risk of water and soil loss was happened between 30～39°gradient;thirdly,meshwork of water system and water and soil loss were relation compactness and lastly,the total of water and soil loss in buffer was 69.5%.