基于ASTER GDEM的南水北调中线水源区水文特征提取及实现

摘要

Extracting physiognomy and the landform information from DEM is an important aspect in the field of the GIS spatial analysis. This paper has done some relevant processing about the upstream of the Danjiangkou reservoir of Hanjiang river basin through using the Hydrology modules of the ArcGIS software, and gets the characteristic information of the basin such as the flow of the research area, converged grids, river water systems, son watershed boundaries and so on. After analyzing the results, this paper discuss and analysis the problems and solutions in information extraction process.%从DEM（数字高程模型）中提取地形、地貌信息是当今GIS空间分析领域中的一个重要方面.利用ArcGIS软件的Hydrology模块,对丹江口水库上游的汉江流域的ASTER GDEM（先进星载热发射和反射辐射仪全球数字高程模型）进行了相关处理,提取了研究区域水流流向、汇流栅格生成、河网水系、子流域边界等流域特征信息,讨论分析了信息提取过程中存在的问题及解决方法.