River hydraulic modeling with ICESat-2 land and water surface elevation

Frias, Monica Coppo1,3; Liu, Suxia2,3; Mo, Xingguo2,3; Nielsen, Karina4; Ranndal, Heidi4; Jiang, Liguang6; Ma, Jun5; Bauer-Gottwein, Peter1

2023-03-06

10.5194/hess-27-1011-2023

HYDROLOGY AND EARTH SYSTEM SCIENCES   Impact Factor & Quartile

1027-5606

1607-7938

Advances in geodetic altimetry instruments are providing more accurate measurements, thus enabling satellite missions to produce useful data for narrow rivers and streams. Altimetry missions produce spatially dense land and water surface elevation (WSE) measurements in remote areas where in situ data are scarce that can be combined with hydraulic and/or hydrodynamic models to simulate WSE and estimate discharge. In this study, we combine ICESat-2 (Ice, Cloud and land Elevation Satellite) land and water surface elevation measurements with a low-parameterized hydraulic calibration to simulate WSE and discharge without the need for surveyed cross-sectional geometry and a rainfall-runoff model. ICESat-2 provides an opportunity to map river cross-sectional geometry very accurately, with an along-track resolution of 0.7 m, using the ATL03 product. These measurements are combined with the inland water product ATL13 to calibrate a steady-state hydraulic model to retrieve unobserved hydraulic parameters such as river depth or the roughness coefficient. The low-parameterized model, together with the assumption of steady-state hydraulics, enables the application of a global search algorithm for a spatially uniform parameter calibration at a manageable computational cost. The model performance is similar to that reported for highly parameterized models, with a root mean square error (RMSE) of around 0.41 m. With the calibrated model, we can calculate the WSE time series at any chainage point at any time for an available satellite pass within the river reach and estimate discharge from WSE. The discharge estimates are validated with in situ measurements at two available gauging stations. In addition, we use the calibrated parameters in a full hydrodynamic model simulation, resulting in a RMSE of 0.59 m for the entire observation period.

SCI

English

Others

CNWaterSense by the Innovation Fund Denmark[8087-00002B] ; Ministry of Science and Technology of China National Key Research and Development Program of China[2018YFE0106500]

Geology ; Water Resources

Geosciences, Multidisciplinary ; Water Resources

WOS:000943982600001

COPERNICUS GESELLSCHAFT MBH

GEOSCIENCES

Web of Science

1.Tech Univ Denmark, Dept Environm & Resource Engn, DK-2800 Kongens Lyngby, Denmark
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 100049, Peoples R China
4.Tech Univ Denmark, Dept Geodesy & Earth Observat, DK-2800 Kongens Lyngby, Denmark
5.Yellow River Water Conservancy Commiss, Hydrol Bur, Zhengzhou 450004, Henan, Peoples R China
6.Southern Univ Sci & Technol, Sch Environm Sci & Engn, 1088 Xueyuan Ave, Shenzhen 518055, Peoples R China

Frias, Monica Coppo,Liu, Suxia,Mo, Xingguo,et al. River hydraulic modeling with ICESat-2 land and water surface elevation[J]. HYDROLOGY AND EARTH SYSTEM SCIENCES,2023,27(5).

Frias, Monica Coppo.,Liu, Suxia.,Mo, Xingguo.,Nielsen, Karina.,Ranndal, Heidi.,...&Bauer-Gottwein, Peter.(2023).River hydraulic modeling with ICESat-2 land and water surface elevation.HYDROLOGY AND EARTH SYSTEM SCIENCES,27(5).

Frias, Monica Coppo,et al."River hydraulic modeling with ICESat-2 land and water surface elevation".HYDROLOGY AND EARTH SYSTEM SCIENCES 27.5(2023).