AirSWOT measurements of river water surface elevation and slope: Tanana River, AK

被引：58

作者：

Altenau, Elizabeth H. ^{[1
]}

Pavelsky, Tamlin M. ^{[1
]}

Moller, Delwyn ^{[2
]}

Lion, Christine ^{[1
]}

Pitcher, Lincoln H. ^{[3
]}

Allen, George H. ^{[1
]}

Bates, Paul D. ^{[4
]}

Calmant, Stephane ^{[5
]}

Durand, Michael ^{[6
,7
]}

Smith, Laurence C. ^{[3
]}

机构：

[1] Univ North Carolina Chapel Hill, Dept Geol Sci, Chapel Hill, NC 27514 USA

[2] Remote Sensing Solut Inc, Pasadena, CA USA

[3] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90024 USA

[4] Univ Bristol, Sch Geog Sci, Bristol, Avon, England

[5] Univ Toulouse, Lab Etud Geophys & Oceanog Spatiale, Observ Midi Pyrenees, UMR 5566,CNES,CNRS,IRD, Toulouse, France

[6] Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA

[7] Ohio State Univ, Byrd Polar & Climate Res Ctr, Columbus, OH 43210 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2017年 / 44卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

AirSWOT; river hydrology; remote sensing; river channels; FLOOD INUNDATION; RADAR INTERFEROMETRY; UNCERTAINTY; ROUGHNESS; DISCHARGE; MODELS;

D O I：

10.1002/2016GL071577

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Fluctuations in water surface elevation (WSE) along rivers have important implications for water resources, flood hazards, and biogeochemical cycling. However, current in situ and remote sensing methods exhibit key limitations in characterizing spatiotemporal hydraulics of many of the world's river systems. Here we analyze new measurements of river WSE and slope from AirSWOT, an airborne analogue to the Surface Water and Ocean Topography (SWOT) mission aimed at addressing limitations in current remotely sensed observations of surface water. To evaluate its capabilities, we compare AirSWOT WSEs and slopes to in situ measurements along the Tanana River, Alaska. Root-mean-square error is 9.0cm for WSEs averaged over 1km(2) areas and 1.0cm/km for slopes along 10km reaches. Results indicate that AirSWOT can accurately reproduce the spatial variations in slope critical for characterizing reach-scale hydraulics. AirSWOT's high-precision measurements are valuable for hydrologic analysis, flood modeling studies, and for validating future SWOT measurements.

引用

页码：181 / 189

页数：9

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