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Volume 373
Proc. IAHS, 373, 153-159, 2016
https://doi.org/10.5194/piahs-373-153-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Proc. IAHS, 373, 153-159, 2016
https://doi.org/10.5194/piahs-373-153-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

  12 May 2016

12 May 2016

Visualising DEM-related flood-map uncertainties using a disparity-distance equation algorithm

S. Anders Brandt and Nancy J. Lim
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Latest update: 13 Dec 2018
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Short summary
The apparent absoluteness of flood boundaries on risk maps can lead to serious mistakes, for example when planning new areas. An empirical equation, that considers both digital elevation model (DEM) resolution and terrain slope, was used to create prediction-uncertainty zones around already modelled flood extents. Results show that the method can visualise inaccuracies due to DEM and slope conditions, thereby enhancing the quality of later decision-making processes.
The apparent absoluteness of flood boundaries on risk maps can lead to serious mistakes, for...
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