基于SRTM DEM和ASTER GDEM的辽河流域河网提取研究  

Research on Drainage Network Extraction in Liaohe Basin Based on SRTM DEM and ASTER GDEM

作　　者：马兰艳[1,2,3,4] 周春平[1] 胡卓玮[1,2,3,4] 王志恒[1,2,3,4] 马国斌[5] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]三维信息获取与应用教育部重点实验室,北京100048 [3]资源环境与地理信息系统北京市重点实验室,北京100048 [4]灾害评估与风险防范民政部重点实验室,北京100048 [5]北京师范大学资源学院,北京100875

出　　处：《安徽农业科学》2011年第5期2692-2695,共4页Journal of Anhui Agricultural Sciences

基　　金：国家科技支撑项目(2008BAK49B07)

摘　　要：以SRTM DEM数据和ASTER GDEM作为基本的地形数据,借助Arc Hydro Tools扩展模块,研究基于地表径流漫流模型的数字河网水系提取方法,并对提取结果对比分析。研究显示,通过引入河网密度参数来确定集水面积阈值,提取结果与1∶25万地形图各级河网拟合程度较好,可运用于辽河流域山洪灾害风险评估模型的实际运行中。In this study,SRTM DEM data and ASTER GDEM data were used as the basic topographic data,and Arc Hydro Tools was utilized for extension module so as to study on extracting digital drainage network of watershed based on surface runoff model,as well as to compare the two extraction results.The result showed that through the introduction of drainage density parameter to determine the river drainage area threshold,the both extracting drainages showed the goodness-of-fit with the factual drainage network on 1：250 000 scale topographic map,and the extracting digital river could be used in practical operation of the risk assessment model of mountain torrents disaster in Liaohe basin.

关 键 词：河网密度 集水面积阈值 辽河流域 

分 类 号：X522[环境科学与工程—环境工程]