Impact of Rainfall Movement on Flash Flood Response: A Synthetic Study of a Semi-Arid Mountainous Catchment

Rainfall is a spatiotemporally varied process and key to accurately capturing catchment runoff determining flood response. Flash response of can be strongly governed by rainfall’s spatiotemporal variability influenced storm movement which drives continuous change throughout rainfall event. In this work, the sensitivity flooded areas are assessed in Kan (Iran). The allochthonous nature floods how they interact with effects investigated. Fifty synthetic rain hyetographs generated traversed over under different velocities directions used force 1D/2D hydrodynamic model. results suggest affects degrees. Peak discharge, hydrograph shapes affected. Storms higher result peaks faster onsets consequently comparison slower storms. direction also plays role. moving along average stream areas. relevance greater for slow Additionally, influence modulated hyetograph structure, behavior greatly dependent on location within drainage network at it assessed.