基于ASTER GDEM的石漠化综合治理中的小流域提取研究——以广西石漠化综合治理应用为例

Study on Small Watershed Division in Rocky Desertification Comprehensive Treatment Based on ASTER GDEM——A Case of Rocky Desertification in Guangxi Comprehensive Treatment Application

石漠化综合治理借鉴小流域综合治理的成功经验,以小流域作为基本治理单元.讨论了应用ArcGIS软件,基于ASTER DEM进行小流域提取的过程和方法,以及小流域提取结果在石漠化综合治理中的实际应用.对提取的小流域的精度及误差进行分析,结果表明:应用ASTER GDEM提取小流域的精度可达1∶50 000的精度.利用ASTER GDEM自动划分小流域具有重要的研究意义和实际应用价值.

Rocky desertification comprehensive treatment draw on successful experience of small watershed management, small watershed management is the basic unit. By using ArcGIS soft wear, extraction process and methods for small watershed and results of watershed extraction of rocky desertification in the practical application have been discussed based on ASTER DEM. By taking extraction accuracy and error analysis of the small watershed, the results show the accuracy of the small watershed extraction up to 1 ： 50000 by using ASTER GDEM. Using ASTER GDEM Automatically dividing small watershed has signifi- cant and practical value.