水土保持通报2012，Vol.32Issue(1)：127-131,5.
基于DEM的黑龙江宾州河流域水系提取试验研究
DEM Based Extraction of River Networks in Binzhou River Basin of Heilongjiang Province
摘要
Abstract
Extracting river network characteristics based on digital elevation model（DEM） is a hotspot in digital hydrology research.By taking Binzhou River basin in the black soil region of Northeast China as an example and using 5-meter resolution DEM as the data for study,river network features were extracted by applying Arc Hydro Tools in ArcGIS 9.2 version.Results showed that when different drainage networks were extracted by setting drainage area threshold value to be 0.75,1.25,2,2.5,3.75,and 5 km2,respectively,different threshold values had very little effect on spatial position of the main stream network,but extracted river network features of the digital watershed changed greatly.A method for setting a suitable threshold value was proposed based on the relation of source density/drainage density with drainage area threshold.It was found that when drainage area threshold was 2 km2,extracted river network features were basically consistent with actual drainage net features,with prediction accuracy reaching 95%.Therefore,automatic extraction of watershed features based on Arc Hydro Tools is feasible.关键词
河网提取/集水面积阈值/数字高程模型/水文处理工具包Key words
river network extracting/drainage area threshold/digital elevation model（DEM）/Arc Hydro Tools分类
天文与地球科学引用本文复制引用
关颖慧,郑粉莉,王彬,丁晓斌,柳艺博..基于DEM的黑龙江宾州河流域水系提取试验研究[J].水土保持通报,2012,32(1):127-131,5.基金项目
国家重点基础研究发展计划资助“不同类型区土壤侵蚀过程与机理” （）
