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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Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (19 Aug 2019) by Albert J. Kettner
AR by J. Michael Johnson on behalf of the Authors (30 Aug 2019)  Author's response    Manuscript
ED: Publish subject to technical corrections (19 Sep 2019) by Albert J. Kettner
AR by J. Michael Johnson on behalf of the Authors (26 Sep 2019)  Author's response    Manuscript
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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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