Flood of (26/4/2018) in the Area of Al–Sfeereh, Rukn El Deen Neighborhood: Causes, Results, and Confrontation Ways(1)

Abstract

The area of the Al – Sfeereh (Rukn El Deen Neighborhood) suffered from a flood disaster on (26/4/2018).

This research demonstrated, through field study, that several factors have been found to be responsible for turning the flood from a natural phenomenon to a disaster affecting the people and properties in the study area. These factors include: the urbanization on the feet of the mountain, and the steep slopes and streams in their lower sectors (10-12°) and (35-50°), respectively. Moreover, the landfill, which has been, over time, expanding in the upper sector of the basin, increases the hazards resulting from the flood because of its capability to carry mixed load. Added to these factors is main stream’s richness with slope break points (waterfalls), specifically in the lower section of the Western Al - Sfeereh Basin.

Through the application of mathematical equations, the hydrological characteristics of the flood were calculated. The findings of the study showed that the arrival time to the urban area is about (13-16) minutes in Al - Sfeereh Basin, the large discharge volume is (100) thousand m³, and the high flow speed ranged between (13-22) m/s.