Flash flood hazard assessment in the Amlog Valley Basin, North-West Galala City, Egypt, based on a morphometric approach

Abstract

One of the natural threats that arises as a result of temporary surface runoff is flooding, which has a large amount of solid material, a high level of water in the streams, a sudden appearance, and a rapid flow velocity. The Wadi Amlog Basin is characterized by the lack of rain and the prevalence of drought, but it is exposed to sudden rains that lead to surface runoff in its dry valleys in a way that results in threats to infrastructure and spatial development in the coastal region. Within this framework, the purpose of this research is to investigate the possible areas of flood hazard by using GIS techniques based on morphometric assessment parameters to determine the risk level of specified subbasins from a digital elevation model (DEM) using remotely sensed SRTM images. The case study results utilized five evaluation degrees, very low, low, moderate, high, and very high, to interpret the flood danger, in a way that contributes to protecting the places most affected by the dangers of floods in the subbasins in the study area.