Articles | Volume 23, issue 1
Research article
01 Feb 2023
Research article |  | 01 Feb 2023

Bare-earth DEM generation from ArcticDEM and its use in flood simulation

Yinxue Liu, Paul D. Bates, and Jeffery C. Neal

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Revised manuscript accepted for HESS
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Cited articles

Archer, L., Neal, J. C., Bates, P. D., and House, J. I.: Comparing TanDEM-X data with frequently used DEMs for flood inundation modeling, Water Resour. Res., 54, 10–205,, 2018. 
Armston, J., Bunting, P., Flood, N., and Gillingham, S.: Pylidar 0.4.4 documentation​​​​​​​ [code], (last access: 26 January 2023), 2015. 
Bates, P. D., Horritt, M. S., and Fewtrell, T. J.: A simple inertial formulation of the shallow water equations for efficient two-dimensional flood inundation modelling, J. Hydrol., 387, 33–45,, 2010. 
Bates, P. D., Neal, J. C., Alsdorf, D., and Schumann, G. J. P.: Observing global surface water flood dynamics, in: The Earth's Hydrological Cycle, Springer, 839–852,, 2013. 
Bates, P.D., Quinn, N., Sampson, C., Smith, A., Wing, O., Sosa, J., Savage, J., Olcese, G., Neal, J., Schumann, G., and Giustarini, L.: Combined modeling of US fluvial, pluvial, and coastal flood hazard under current and future climates, Water Resour. Res., 57, e2020WR028673,, 2021. 
Short summary
In this paper, we test two approaches for removing buildings and other above-ground objects from a state-of-the-art satellite photogrammetry topography product, ArcticDEM. Our best technique gives a 70 % reduction in vertical error, with an average difference of 1.02 m from a benchmark lidar for the city of Helsinki, Finland. When used in a simulation of rainfall-driven flooding, the bare-earth version of ArcticDEM yields a significant improvement in predicted inundation extent and water depth.
Final-revised paper