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Volumes > Vol. 12 > No. 9

 
   

Flood Risk Mapping and Management in Urban Areas: Integrating Geomatics and Hydrodynamic Modeling - A Case Study of Al Bidi City, Saudi Arabia

PP: 2411-2443
doi:10.18576/isl/120940
Author(s)
Ashraf Abdelkarim, Ahmed F. D. Gaber,
Abstract
In this paper, we focus on developing a comprehensive approach to map and manage flood risks in Al Bidi City, located in the Al-Aflaj Governorate of Saudi Arabia. By integrating geomatics (Remote Sensing and GIS) and hydrodynamic modeling (PCSWMM and HEC-RAS), the study aims to simulate and model flood risks in populated areas under different scenarios, considering the impact of climate change. The study generates three integrated maps: flood intensity, environmental sensitivity, and flood risks. Strategic solutions and mitigation measures are proposed based on the findings. The results indicate that Al Bidi City is exposed to flood risks originating from the west and progressing towards the east, primarily due to significant valleys such as Wadi Harm. Approximately 60% of the urban area is affected by torrential water. The study proposes the construction of embankments, channels, and culverts to redirect floodwaters to Wadi Al Jadwal in the east, as well as the implementation of industrial channels to manage floods in the northern valleys.

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