Articles | Volume 16, issue 8
https://doi.org/10.5194/essd-16-3873-2024
https://doi.org/10.5194/essd-16-3873-2024
Data description paper
 | 
28 Aug 2024
Data description paper |  | 28 Aug 2024

SHIFT: a spatial-heterogeneity improvement in DEM-based mapping of global geomorphic floodplains

Kaihao Zheng, Peirong Lin, and Ziyun Yin

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Cited articles

Andreadis, K. M., Wing, O. E. J., Colven, E., Gleason, C. J., Bates, P. D., and Brown, C. M.: Urbanizing the floodplain: global changes of imperviousness in flood-prone areas, Environ. Res. Lett., 17, 104024, https://doi.org/10.1088/1748-9326/ac9197, 2022. 
Annis, A., Nardi, F., Morrison, R. R., and Castelli, F.: Investigating hydrogeomorphic floodplain mapping performance with varying DTM resolution and stream, Hydrolog. Sci. J., 64, 515–538, 2019. 
Afshari, S., Tavakoly, A. A., Rajib, M. A., Zheng, X., Follum, M. L., Omranian, E., and Fekete, B. M.: Comparison of new generation low-complexity flood inundation mapping tools with a hydrodynamic model, J. Hydrol., 556, 539–556, https://doi.org/10.1016/j.jhydrol.2017.11.036, 2018. 
Bates, P.: Fundamental limits to flood inundation modelling, Nat. Water, 1, 566–567, https://doi.org/10.1038/s44221-023-00106-4, 2023. 
Bates, P. D., Neal, J., Sampson, C., Smith, A., and Trigg, M.: Chapter 9 – Progress Toward Hyperresolution Models of Global Flood Hazard, in: Risk Modeling for Hazards and Disasters, edited by: Michel, G., Elsevier, 211–232, https://doi.org/10.1016/B978-0-12-804071-3.00009-4 2018. 
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Short summary
We develop a globally applicable thresholding scheme for DEM-based floodplain delineation to improve the representation of spatial heterogeneity. It involves a stepwise approach to estimate the basin-level floodplain hydraulic geometry parameters that best respect the scaling law while approximating the global hydrodynamic flood maps. A ~90 m resolution global floodplain map, the Spatial Heterogeneity Improved Floodplain by Terrain analysis (SHIFT), is delineated with demonstrated superiority. 
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