ARCGIS环境下基于DEM的流域特征提取

Extracted catchment properties from DEM using ARCGIS

研究选取位于陕西省延安城南12 km处的万花乡向阳沟小流域。采用1∶10000大比例尺的比例尺5 m分辨率的DEM作为基本的地形数据,应用ESR I公司开发的ARCG IS地理信息系统软件进行流域特征的提取。经分析得到了研究区域河网特征以及研究区其它常用的流域特征信息,与实际河流水系特征基本吻合,认为应用DEM划分的流域结果是合理的。

The paper studies how to use ARCGIS, a Geographical Information System software, to extract the characters of watershed by assuming DEM with 1 ： 10000 scale and 5 m resolution. Xiangyanggou, a watershed located 12 km from southern of Yan＇an city, is chosen to learn the characters of watershed from DEM. With analysis of ARCGIS, the data about the watershed, such as flow direction, stream networks and orther catchment properties are collected. Comparing with the actual catchment properties, they are same and rational.