Articles | Volume 19, issue 7
https://doi.org/10.5194/nhess-19-1445-2019
https://doi.org/10.5194/nhess-19-1445-2019
Research article
 | 
18 Jul 2019
Research article |  | 18 Jul 2019

Reducing uncertainties in flood inundation outputs of a two-dimensional hydrodynamic model by constraining roughness

Punit Kumar Bhola, Jorge Leandro, and Markus Disse

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Cited articles

Arcement, G. J. and Schneider, V. R.: Guide for selecting manning's roughness coefficients for natural channels and flood plains, Water-Supply paper 2339, United States Department of Transportation, Denver, USA, 38 pp., 1989. 
Aronica, G., Hankin, B., and Beven, K.: Uncertainty and equifinality in calibrating distributed roughness coefficients in a flood propagation model with limited data, Adv. Water Resour., 22, 349–365, https://doi.org/10.1016/S0309-1708(98)00017-7, 1998. 
Bach, P. M., Rauch, W., Mikkelsen, P. S., McCarthy, D. T., and Deletic, A.: A critical review of integrated urban water modelling – urban drainage and beyond, Environ. Modell. Softw., 54, 88–107, https://doi.org/10.1016/j.envsoft.2013.12.018, 2014. 
Bales, J. D. and Wagner, C. R.: Sources of Uncertainty in flood inundation maps, J. Flood Risk Manag., 2, 139–147, https://doi.org/10.1111/j.1753-318X.2009.01029.x, 2009. 
Bates, P. D., Pappenberger, F., and Romanowicz, R. J.: Uncertainty in flood inundation modelling, in: Applied uncertainty analysis for flood risk management, edited by: Beven, K. and Hall, J., Imperial College Press, London, UK, 232–269, https://doi.org/10.1142/9781848162716_0010, 2014. 
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This study investigates the use of measured water levels to reduce uncertainty bounds of two-dimensional hydrodynamic model output. Uncertainty assessment is generally not reported in practice due to the lack of best practices and too wide uncertainty bounds. Hence, a novel method to reduce the bounds by constraining the model parameter, mainly roughness, is presented. The operational practitioners as well as researchers benefit from the study in the field of flood risk management.
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