期刊
GEOPHYSICAL RESEARCH LETTERS
卷 45, 期 7, 页码 3107-3114出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2018GL077379
关键词
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资金
- U.S. National Science Foundation Office of Polar Programs [A005265701]
- NASA SWOT Science Team grant [NNX16AH82G]
- NASA Terrestrial Hydrology Program [NNX13AD05G]
- National Science Foundation
- National Science Foundation (NSF)
- National Aeronautics and Space Administration (NASA) under NSF Cooperative Agreement [EAR-0735156]
- NASA [NNX13AD05G, 475250] Funding Source: Federal RePORTER
ArcticDEM is a collection of 2-m resolution, repeat digital surface models created from stereoscopic satellite imagery. To demonstrate the potential of ArcticDEM for measuring river stages and discharges, we estimate river surface heights along a reach of Tanana River near Fairbanks, Alaska, by the precise detection of river shorelines and mapping of shorelines to land surface elevation. The river height profiles over a 15-km reach agree with in situ measurements to a standard deviation less than 30 cm. The time series of ArcticDEM-derived river heights agree with the U.S. Geological Survey gage measurements with a standard deviation of 32 cm. Using the rating curve for that gage, we obtain discharges with a validation accuracy (root-mean-square error) of 234 m(3)/s (23% of the mean discharge). Our results demonstrate that ArcticDEM can accurately measure spatial and temporal variations of river surfaces, providing a new and powerful data set for hydrologic analysis.
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