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

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

doi:https://doi.org/10.5194/nhess-23-375-2023

Articles | Volume 23, issue 1

https://doi.org/10.5194/nhess-23-375-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-23-375-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Supplement

https://doi.org/10.5194/nhess-23-375-2023-supplement

Data sets

Elevation model 2 m data download National Land Survey of Finland https://tiedostopalvelu.maanmittauslaitos.fi/tp/kartta?lang=en

Elevation model 2 m description National Land Survey of Finland https://www.maanmittauslaitos.fi/en/maps-and-spatial-data/expert-users/product-descriptions/elevation-model-2-m

Coordinate transformations National Land Survey of Finland https://www.maanmittauslaitos.fi/kartat-ja-paikkatieto/asiantuntevalle-kayttajalle/koordinaattimuunnokset

MODIS/Terra Snow Cover Daily L3 Global 500m SIN Grid, Version 6 D. K. Hall and G. A. Riggs https://doi.org/10.5067/MODIS/MOD10A1.006

Building information grid of the Helsinki metropolitan area Helsingin seudun ympäristöpalvelut HSY https://hri.fi/data/en_GB/dataset/rakennustietoruudukko

Bare-earth ArcticDEM Y. Liu, P. Bates, and J. Neal https://doi.org/10.5523/bris.3c1l2q7u1x14a262m6z7hh0c4r

Model code and software

LISFLOOD-FP 8.0 hydrodynamic model (8.0) LISFLOOD developers https://doi.org/10.5281/zenodo.4073011

Building footprint OpenStreetMap https://overpass-turbo.eu/

Pylidar 0.4.4 documentation J. Armston, P. Bunting, N. Flood, and S. Gillingham http://www.pylidar.org/en/latest/index.html

SMRF code T. J. Pingel https://github.com/thomaspingel/smrf-matlab

Download

Article (6125 KB)
Full-text XML

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.