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	Automated extraction of drainages in China based on DEM in GIS environment
	Xu X. L. ; Zhuang D. F. ; Ieee
	2003
关键词	hydrology drainage digital elevation model (DEM) geographical information system (GIS) automated extraction digital elevation models channel networks
页码	3344-3346
英文摘要	Automated extraction the flow network and drainages is a premise of matching the observation datum and developing water cycle information system. This paper put forward a method that automatically extract drainages in China from DEM data. This method used DEM data of 1:250,000 scale. Firstly divided the whole country into 9 parts based on the drainages that extracted from 1KM DEM data; secondly filled sinks and removed peaks in each part and identified the flow direction of each cell using flowdirection() function, then calculated the flow accumulation of each cell according to flow direction and identified the flow network by setting the threshold value; finally used the watershed() function to find out all the sub-drainages based on the flow networks and the watershed outlet. On the other hand, this article listed the AML code for automated extraction drainages from DEM data. Additionally the author checked the result of automated extraction using some surveyed data in Haihe drainage area. Through analysis on the comparison between the flow networks and drainage area that extracted using this method and surveyed data, a conclusion can be draw that this method is effective and efficient.
收录类别	CPCI
会议录出版者	Ieee
语种	英语
ISBN号	0-7803-7929-2
内容类型	会议论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/25346]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Xu X. L.,Zhuang D. F.,Ieee. Automated extraction of drainages in China based on DEM in GIS environment[C]. 见:.

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