Articles | Volume 19, issue 11
Nat. Hazards Earth Syst. Sci., 19, 2405–2420, 2019
https://doi.org/10.5194/nhess-19-2405-2019

Special issue: Advances in computational modelling of natural hazards and...

Nat. Hazards Earth Syst. Sci., 19, 2405–2420, 2019
https://doi.org/10.5194/nhess-19-2405-2019
Research article
04 Nov 2019
Research article | 04 Nov 2019

An integrated evaluation of the National Water Model (NWM)–Height Above Nearest Drainage (HAND) flood mapping methodology

J. Michael Johnson et al.

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Short summary
The coupled National Water Model (NWM)–Height Above Nearest Drainage flood mapping methodology provides the basis for operational flood forecasting across the continental United States. This paper evaluates how the method performs for 28 case studies using a historic archive of flood extents and a retrospective run of the NWM. We provide a summary of the results and discuss where the method is performing reliably, the general reasons for poor forecasts, and how the method might be improved.
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