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

Data sets

Elevation model 2 m data download National Land Survey of Finland

Elevation model 2 m description National Land Survey of Finland

Coordinate transformations National Land Survey of Finland

MODIS/Terra Snow Cover Daily L3 Global 500m SIN Grid, Version 6 D. K. Hall and G. A. Riggs

Building information grid of the Helsinki metropolitan area Helsingin seudun ympäristöpalvelut HSY

Bare-earth ArcticDEM Y. Liu, P. Bates, and J. Neal

Model code and software

LISFLOOD-FP 8.0 hydrodynamic model (8.0) LISFLOOD developers

Building footprint OpenStreetMap

Pylidar 0.4.4 documentation J. Armston, P. Bunting, N. Flood, and S. Gillingham

SMRF code T. J. Pingel

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