Modeling of Flood Wave Propagation Due to Hemren Dam Failure

Nada M. Al-Nedawi; Saad Sh. Sammen; Ali Fakhri

doi:10.24237/djes.2024.17309

Authors

Nada M. Al-Nedawi Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Saad Sh. Sammen
saad123engineer@yahoo.com
Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Ali Fakhri Iraqi Ministry of Water Resources, Center of Studies and Engineering Design, Baghdad, Iraq

Keywords:

Dam failure, Overtopping, Flood, Hemren Dam, HEC-RAS Model

Abstract

The occurrence of dam failures and the consequent floods pose substantial risks to submerged regions, and their unpredictability increases the hazard of their impact. This research simulates the flood event scenario due to the dam failure of the Hemrem dam in Diyala Governorate, Iraq. HEC-RAC model jas been used to modeling the Hemren dam failure. The generated flood waves are routed downstream until the confluence of the Diyala and Tigris rivers, covering a large study area of 5,378.5 km². The configuration of the model's geometry is formulated using the Digital Elevation Model (DEM) that encompasses the geographical extent of the Diyala River study area, from Hemren Dam to the confluence with the Tigris River south of Baghdad. The length of this reach is approximately 210 km. Based on the inundation maps, the region's geography is classified as having catastrophic constraints due to the water depth and flow rate. The results demonstrate how to predict the magnitude of floods and highlight the severity if Hemren Dam were to fail. This underscores the need for effective risk management. Furthermore, the maps created by this study can be utilized to develop long-term flood control plans.

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