| GIS支持下基于DEM的中等流域的划分——以富县为例 |
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| 引用本文： | 丑述仁,高微微,于占超,王超,李明.GIS支持下基于DEM的中等流域的划分——以富县为例[J].地下水,2011(6):131-133. |
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| 作者姓名： | 丑述仁 高微微 于占超 王超 李明 |
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| 作者单位： | 西北大学城市与环境学院;东北师范大学生命科学学院草地研究所;吉林大学环境与资源学院 |
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| 摘 要： | 以陕西富县为例,探讨在GIS环境下从数字高程模型(DEM)中提取流域特征并进行中等流域的划分的详细过程,包括DEM的预处理、流水方向的确定、汇流累积量分析、河网的提取和子流域的划分,通过设定不同的汇流累积量的阈值,通过实验,富县地区的阈值设为20 000,得到中等流域的划分结果较为合理。
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| 关 键 词： | 数字高程模型 流域 GIS 划分 |
Watershed Division based on DEM in GIS |
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| CHOU Shu-ren,GAO Wei-wei,YU Zhan-cao,WANG Chao,LI Ming.Watershed Division based on DEM in GIS[J].Groundwater,2011(6):131-133. |
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| Authors: | CHOU Shu-ren GAO Wei-wei YU Zhan-cao WANG Chao LI Ming |
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| Institution: | 1.College of Urban and Environmental Science,Northwest University,Xian 710127,Shaanxi;2.Institute of Grassland Science,Northeast Normal University,Changchun 130024,Jilin;3.College of Envirment and Resouces,Jilin University,Changchun 130026,JIlin) |
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| Abstract: | As an example of Fu county in Shaanxi province,the article discusses which extract the basin’s the characteristics from digital elevation model(DEM) and have a detailed process how to divide the secondary river GIS environment,including the pretreatment,water DEM direction determination,the confluence collection analysis and river extraction and different division of the basin.The article is based on setting the confluence collection threshold and through experiments,the threshold in Fu county district is set to 20,000,a medium basin partitioning results received is more reasonable. |
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| Keywords: | Digital Elevation Model watershed GIS and division |
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