ISSN: 1813-0410

Author : A.H. Alhadrawi, Dilshad

The Mathematical Model of RCC Dam Break, Bastora Dam as a Case Study

Najm O.S. Alghazali; Dilshad A.H. Alhadrawi

journal of kerbala university, Volume 8, Issue 1, Pages 313-324

In this study, the simulation of the hypothetical failure of Bastora dam and prediction of the resultingflood wave are performed. Bastora dam is a roller compacted concrete (RCC) dam, it is located North East of Iraq about 30 km from Erbil city. Five different cases of breach width are investigated for the analysis of dam break simulations (0.2, 0.3, 0.35, 0.4, and 0.5) times of the dam crest length to determine the peak outflow. To predict the flood wave, the hydrologic technique involves the level pool routing method is used to compute the reservoir outflow hydrograph. Routing the breach outflow hydrograph downstream the dam is achieved by using the U.S. Army Corps of Engineers computer program (HEC - RAS 3.1.3) which is based on the complete one dimensional Saint-Venant equations for unsteady flow. The maximum water levels and maximum discharges at (11) sections of the river downstream the dam are determined for the case of Bastora dam failure due to over-stressing. The rescue level is also determined.