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

Punit Kumar Bhola, Jorge Leandro, Markus Disse

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The consideration of uncertainties in flood risk assessment has received increasing attention over the last 2 decades. However, the assessment is not reported in practice due to the lack of best practices and too wide uncertainty bounds. We present a method to constrain the model roughness based on measured water levels and reduce the uncertainty bounds of a two-dimensional hydrodynamic model. Results show that the maximum uncertainty in roughness generated an uncertainty bound in the water level of 1.26m (90% confidence interval) and by constraining roughness, the bounds can be reduced as much as 0.92m.

Original languageEnglish
Pages (from-to)1445-1457
Number of pages13
JournalNatural Hazards and Earth System Sciences
Volume19
Issue number7
DOIs
StatePublished - 18 Jul 2019

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