GEOMORPHOLOGICAL ANALYSIS OF FLASH FLOODS USING MULTIPLE HAZARDS MODEL IN ABU HAD BASIN, RED SEA, EGYPT.

The Ras Gharib area on the Red Sea coast of Egypt received heavy rainfall from Wadi Abu Had on October 26–27, 2016. The area experienced flash flooding due to this abnormal quantity of rainfall, which resulted in the deaths of tens of people and significant damage to infrastructure and properties. Multi-hazard risk analysis is a general term that refers to the analysis of the dangers in a given time and place, their magnitude, the description of how they interact, and the interpretation of the results of this compounding on a target group. The objective of this paper is to build a model of the multiple hazards that result from the flash floods in the Wadi Ras-Ghareb basin and analyze their effects on Ras-Ghareb city. We utilized satellite images, conducted extensive fieldwork in the valley, and performed runoff analysis, which includes various morphometric parameters and valley flood analysis models, to determine the likelihood of heavy floods occurring in the valley basin and Ras-Ghareb city. We generate hydrological and surface analyses using GIS tools. Some important morphometric analyses are calculated for basin description. The geologic and geomorphologic characteristics of the study area controlled the intensity and distribution of flood destruction. Therefore, rapid precipitation and unplanned development intensify the flood's impact. The results reveal the possibility of future general flooding threatening the populous city of Ras-Ghareb. Therefore, the construction of a canal to absorb the flood load and discharge it into the Red Sea is vital to protect the city from future flood risks.