基于GIS和DEM的流域特征信息提取——以吉太曲流域为例  

Acquisition of basin characteristics based on GIS and DEM——A case study of Jitaiqu watershed

作　　者：秦国民[1] 戴荣[1] 

机构地区：[1]中国水电顾问集团西北勘测设计研究院,西安710065

出　　处：《西北水电》2010年第3期4-5,21,共3页Northwest Hydropower

摘　　要：介绍了数字高程模型(DEM)的概念,利用ArcG IS软件及其水文扩展模块,以吉太曲流域为例,对DEM进行预处理。根据水流方向生成河网,最后进行全流域和子流域边界的划分并确定流域面积,取得了较好的效果。The paper presents the concept of digital elevation model （DEM） and preprocesses DEM by using ArcGIS software and its hydrology extension module of Jitaiqu watershed. Good results were obtained in defining the catchment area after dividing the boundary of the whole basin and sub-basin according to the generation of river network in the direction of water flow.

关 键 词：数字高程模型 水网 流域特征 

分 类 号：TV12[水利工程—水文学及水资源]