Evaluation of Risk Areas Due to the Piping and Failure of Ghare Aghach earth Dam Using Satellite Images

Hydraulic simulation of dam failure and estimation of damages From it, it will be of great help in the field of relief activities and proper planning in the downstream areas. In the present study, the hazardous areas due to the failure of the Ghare Aghach dam of piping type have been investigated using satellite images. Parameters due to dam failure were calculated using the BREACH model and its information was entered into HEC-RAS software. The results showed that using the BREACH model, the peak flow due to dam failure is 3318.8 cubic meters per second. The time due to dam failure was estimated to be 3.31 hours. According to HEC-RAS software, the results show that the maximum output flow due to the failure of the dam occurred 165 minutes after the simulation and is 3160.1 cubic meters per second. The flooding area of the downstream areas was estimated to be approximately 18.6 square kilometers. The area of endangered residential areas in Mehrgerd and Hosseinabad villages was estimated to be approximately 66995 and 12543 square meters, respectively. The radius of flooding relative to the coastline of the flow in the mentioned areas was estimated to be 443 and 3362 meters, respectively.