华中师范大学学报（自然科学版）2011，Vol.45Issue(4)：655-658,4.
GIS环境下基于GDEM的丹江口库区流域自动提取方法的研究
Automated extraction of drainages in Danjiangkou Reservoir based on GDEM in GIS environment
摘要
Abstract
Watershed is a relative integrated ecological process unit. We can acknowledge the Geographical law in the reservoir on the medium scale. Taking Danjiankou reservoir as the experimental study object, this paper chooses the DEM of 30m resolution as the data source to introduce the method of extracting river network based on the software of ArcGIS developed by ESRI. Firstly, we fill sinks and remove peaks of the DEM data, then identify the flow direction, analysis the flow accumulation, identified the flow network, finally, find out the sub-drainages. The result of the study shows: the watershed boundary line is almost identical to the ridge line in the mountain and hill knap area, but in the flat area, the result may exist certain errors because of the sparse contour lines. The fast extraction of watersheds based on DEM greatly saves manpower and material resources. Through this way, we may promote the protection and the construction of the eco-environment. It is also significant for the South-to-North Water Transfer Project to work efficiently for great lengths of time.关键词
数字高程模型(DEM)/GIS/丹江口库区/流域/自动提取Key words
Digital Elevation Model (DEM)/ Geographical Information System(GIS)/Danjiangkou Reservoir/ drainage/automated extraction分类
天文与地球科学引用本文复制引用
李辉,黄进良,王立辉,赵国松..GIS环境下基于GDEM的丹江口库区流域自动提取方法的研究[J].华中师范大学学报（自然科学版）,2011,45(4):655-658,4.基金项目
国家自然科学基金项目(40871260). （40871260）
