Articles | Volume 19, issue 11
Nat. Hazards Earth Syst. Sci., 19, 2405–2420, 2019

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

Nat. Hazards Earth Syst. Sci., 19, 2405–2420, 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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Revised manuscript accepted for NHESS
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Cited articles

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, 2018. 
Blodgett, D.: nhdplusTools, Github Repository, GitHub, (last access: 26 September 2019), 2018. 
Clarke, K. C., Johnson, J. M., and Trainor, T.: Contemporary American cartographic research: a review and prospective, Cartogr. Geogr. Inform. Sci., 46, 196–209, 2019. 
Cohen, S., Brakenridge, G. R., Kettner, A., Bates, B., Nelson, J., McDonald, R., Huang, Y., Munasinghe, D., and Zhang, J.: Estimating floodwater depths from flood inundation maps and topography, J. Am. Water Resour. Assoc., 54, 847–858, 2018. 
CUASHI: NWM-Subsetting, Github Repository, Github,, last access: 26 September 2019. 
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.
Final-revised paper