rc Hydro Tools流域提取方法应用——以辽宁省河流为例
Method of extraction of drainage networks based on Arc Hydro Tools: a case study of rivers in Liaoning Province
应用Arc Hydro Tools软件，以辽宁省为研究范围，采用目前分辨率较高的ASTER GDEM DEM数据，进行了辽宁省内河网及流域的提取。结果显示传统无地形修复方法，在平原地区无法正确计算河网流向，生成的河网与实际河网存在较大差异；提取到满意的河网是流域提取的前提，采用已知矢量河网作为辅助信息进行地形修复，可以在平原地区提取到满意的河网。提取河网时集水面积阈值的大小，影响河流的长度、数量以及集水区的疏密，不影响河流流域的外边界。通过减小阈值可以提取出河流的支流以及流域的子集水区；通过增大阈值，可以只提取干流信息及其流域边界，忽略支流及子集水区信息。实践证明基于Arc Hydro Tools地形修复的流域提取方法，并配合较高分辨率DEM数据够得到理想的流域提取结果。
Based on Arc Hydro Tools and high resolution DEM data from ASTER GDEM, drainage networks of rivers in Liaoning Province were extracted. Results revealed the deficiency of the traditional method of extraction of drainage networks without terrain reconditioning. Using known streams information as supplementary information to revise terrain can improve drainage extraction result at flat areas. Catchment area threshold determines stream length, number and catchments density, and it does not affect drainage boundary. Decreasing the threshold value helps to extract more branches and sub-catchments, while increasing the value can extract main streams and drainage boundaries and ignore information of branches. Our practice proves that drainage extraction method based on Arc Hydro Tools plus high resolution DEM data can achieve ideal extraction of drainage networks.
王辉、栾维新、康敏捷、赵冰茹
水利调查、水利规划水工勘测、水工设计
地图学与地理信息系统辽宁省流域提取rc Hydro Tools
cartography and geographic information systemLiaoning Provincedrainages extractionArc Hydro Tools
王辉,栾维新,康敏捷,赵冰茹.rc Hydro Tools流域提取方法应用——以辽宁省河流为例[EB/OL].(2012-06-06)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201206-102.点此复制
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