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Rapid Watershed Delineation Using an Automatic Outlet Relocation on Algorithm

文献类型：期刊论文

作者Xie, Jiaxin1,2; Liu, Xiaomang2; Bai, Peng2; Liu, Changming2
刊名WATER RESOURCES RESEARCH
出版日期2022-03-01
卷号58期号:3页码:13
ISSN号0043-1397
DOI10.1029/2021WR031129
通讯作者Liu, Xiaomang(liuxm@igsnrr.ac.cn)
英文摘要Delineating the boundaries of numerous watersheds is essential for hydrological analysis in the big data era. Various techniques, such as ArcGIS, have been developed to delineate watershed boundaries. However, existing techniques suffer from two laborious manual processes: (a) Determine flow accumulation thresholds through trial and error to derive digital stream networks; (b) Manually relocate watershed outlets to the correct stream networks. Here, we proposed an automatic outlet relocation (AOR) algorithm for rapid watershed delineation without manual processing. The AOR algorithm relocates outlets to correct stream networks by analyzing flow accumulation gradients along the flow directions. An experiment using the AOR algorithm in 1,398 watersheds across the contiguous United States showed that 94.1% of the watersheds were correctly delineated, compared to 81.3% accuracy of the ArcGIS relocation algorithm (Snap Pour Point). In addition, the AOR algorithm took 58 min to delineate the 1,398 watersheds on a 90 m-resolution flow direction, while the ArcGIS algorithm required 586 min to perform the same task. Thus, the AOR algorithm offers an opportunity to automatically delineate a large number of watersheds for hydrological simulations in the big data era. Software with a graphical user interface for the AOR algorithm is freely available on GitHub (https://github.com/xiejx5/watershed_delineation).
WOS关键词DRAINAGE NETWORK EXTRACTION ; FLAT SURFACES ; ELEVATION ; DIRECTION ; ASSIGNMENT ; RESOLUTION
资助项目National Natural Science Foundation of China[41922050] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2018067]
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
语种英语
WOS记录号WOS:000834099100045
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/181946]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Xiaomang
作者单位1.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Xie, Jiaxin,Liu, Xiaomang,Bai, Peng,et al. Rapid Watershed Delineation Using an Automatic Outlet Relocation on Algorithm[J]. WATER RESOURCES RESEARCH,2022,58(3):13.
APA Xie, Jiaxin,Liu, Xiaomang,Bai, Peng,&Liu, Changming.(2022).Rapid Watershed Delineation Using an Automatic Outlet Relocation on Algorithm.WATER RESOURCES RESEARCH,58(3),13.
MLA Xie, Jiaxin,et al."Rapid Watershed Delineation Using an Automatic Outlet Relocation on Algorithm".WATER RESOURCES RESEARCH 58.3(2022):13.

入库方式： OAI收割

来源：地理科学与资源研究所

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