4. Conclusion
The occurrence of human threats such as military or terrorist attacks on dams cannot be completely restrained but losses and damages resulted from it can be reduced. The preliminary and most important step in reducing the risk of flooding due to the dam’s break is assessing the risk for the downstream.
By achieving the risk, solutions to reduce the risk of downstream properties such as early warning or portable flood protection solutions to deal with this Phenomenon can be assigned for high-risk areas. This preparation should take place with a specific schedule and planning in different prospects of crisis management to reduce its damages.
The new hybrid method for vulnerability assessment and risk analysis is developed in this study by the combination of security risk approaches and hydraulic of flood due to a dam break. Thus, the basic method for vulnerability and risk assessment is chosen as SVA, which is approved by EPA and API. Then for Vulnerability assessment, the HEC-RAS is employed for achieving velocity and height of flood and flood mapping due to the different scenarios of the flood. Finally, by using GIS, all elements of risk are introduced in different layers and by the integration of them, the risk map is achieved for each scenario. The most important results are met by applying in a case study as follows: