Bauer-Gottwein, Peter and Zakharova, Elena and Coppo Frías, Monica and Ranndal, Heidi and Nielsen, Karina and Christoffersen, Linda and Liu, Jun and Jiang, Liguang (2023) A hydraulic model of the Amur River informed by ICESat-2 elevation. Hydrological Sciences Journal. pp. 1-15. ISSN 0262-6667

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Abstract

Accurate predictions of water surface elevation (WSE) in rivers at high spatial and temporal resolution are important for flood/drought risk assessment and flood/drought forecasting and management. WSE in a river is controlled by three main factors: discharge, riverbed geometry, and hydraulic roughness. In remote and poorly instrumented rivers, discharge and riverbed geometry are highly uncertain and WSE is therefore hard to predict. ICESat-2 laser altimetry provides accurate elevation transects across the river at very high spatial resolution (70 cm along track). This paper demonstrates how ICESat-2 elevation transects can be used to parameterize a basin-scale hydraulic model of a continental-scale river. The workflow is demonstrated for the transboundary Amur River in North-East Asia. Simulated WSE is subsequently validated against a large dataset of in situ and satellite altimetry observations, and we demonstrate that the model can reproduce available WSE observations throughout the basin with an accuracy of 1–2 m.

Item Type:	Article
Additional Information:	This work has been partly funded by the Hydrocoastal project (European Space Agency) and supported by Innovation Fund Denmark through the ChinaWaterSense project [File number: Innovationsfonden 8087-00002B] and the National Key Research and Development Program of China project [2018YFE0106500]; European Space Agency.
Keywords:	ICESat-2; satellite altimetry; hydrodynamic modelling; Amur River; riverbed geometry;
Academic Unit:	Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS
Item ID:	17620
Identification Number:	https://doi.org/10.1080/02626667.2023.2245811
Depositing User:	Corinne Voces
Date Deposited:	02 Oct 2023 09:09
Journal or Publication Title:	Hydrological Sciences Journal
Publisher:	Taylor & Francis
Refereed:	Yes
Funders:	European Space Agency , ESA
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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