Flash flood risk assessment in urban arid environment: case study of Taibah and Islamic universities’ campuses, Medina, Kingdom of Saudi Arabia

AbstractFlooding impacts can be reduced through application of suitable hydrological and hydraulic tools to define flood zones in a specific area. This article proposes a risk matrixtechnique which is applied on a case study of Taibah and Islamic universities catchment in Medina, Kingdom of Saudi Arabia (KSA). The analysis is based on integration of the hydrologic modelhydraulic models to delineate the flood inundation zones. A flood risk matrixis developed based on the flood occurrence probability and the associated inundation depth. The risk matrixcriterion is classified according to the degree of risks as high, moderate and low. The case study has indictedlow to moderate risk for flood frequencies of 5 years return periodsand moderate to high risk may exist for flood with rerun period of 50 and 100 years. The results are projected on a two-dimensional satellite images that shows the geographical locations exposed to flooding. A quantitative summary of the results have been presented graphically t...