文章基本信息

标题：Research on Watershed Extraction Method Based on GIS
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作者：Yanan Li ; Na Lei ; Yufei Xiong 等
期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：300
期号：2
页码：1-8
DOI：10.1088/1755-1315/300/2/022168
出版社：IOP Publishing
摘要：The Digital Elevation Model (DEM) mainly describes the ground elevation, which contains rich hydrological information and is one of the main data sources for current watershed analysis. This paper takes Fuxian County of Shaanxi Province as the research area, and uses the ASTER GDEM data of 30m resolution, based on the Hydrology module of ArcGIS10.3 platform, after the filling of the earth, the calculation of the flow direction, the calculation of the cumulant accumulation, the determination of the convergence threshold, the extraction of the river network, etc. The method of basin watershed extraction is studied and the characteristics of the basin are comprehensively analysed. The results show that when the convergence threshold is 11000, the extracted river network is closest to the actual river network, and the derivative relationship can be used to determine that the extracted river network reflects the threshold of the real water system.