Surface Water Hydrologic Simulation of Qingshuijiang Watershed Based on SRTM DEM

摘要：

The Digital Elevation Model (DEM) derived from NASAs Shuttle Radar Topography Mission is the most accurate nearglobal elevation model that is publicly available.The characteristics,advantages,and disadvantages of Shuttle Radar Topography Mission (SRTM) data sets were reviewed and discussed briefly.In order to verify the effect of applying SRTM data sets in surface water hydrologic simulation,a tool set named Arc Hydro Tools that is utilized to extract watershed characteristics was introduced,developed as an ArcGIS interface.The Qingshuijiang watershed in Guizhou Province,Southwest China,was taken as a case study.Using the tool set,the river network and subwatersheds of main tributaries were delineated from CGIAR-CSI SRTM 90 m DEM.By comparing the river network delineated from CGIAR-CSI SRTM 90 m DEM with the actual river network and comparing areas of the subwatersheds delineated from CGIAR-CSI SRTM 90 m DEM with the actual areas of the subwatersheds,it can be concluded that the delineated river network is generally in accord with the actual river network,as well as the areas of the delineated subwatersheds.The CGIAR-CSI SRTM 90 m DEM will promote the use of geospatial science and applications for digital topography analysis,especially for surface water hydrologic simulation.

关键词： SRTM DEM Arc Hydro Tools automated extraction river watershed

作者: Congguo Tang Congqiang Liu

作者单位: State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academic of Science,Guiyang 550002,China

会议类型: 国际会议

会议名称: 第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)

会议地点: 广州

会议语种:英文

在线出版日期: 2008-06-28（万方平台首次上网日期，不代表论文的发表时间）