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

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