Seismic Risk Analysis and Scenario Development of Water Supply Systems

Continuous supply of potable water after earthquake has always been one of the most important concerns of every nation and society. Water supply system is encountered with a wide range of hazards and risks that makes this system one of the most vulnerable lifelines. The high seismic potential of different areas in Iran, and also catastrophic consequences of the earthquake shows the urgent need to carry out researches in this field. This study has been done in order to assess different failure scenarios of water supply system, considering the whole water supply chain (including raw water, water treatment plant and distribution network).
In this research, the risk of population being without water after occurrence of earthquake scenarios in a Metropolitan area around a water treatment plant is analyzed using Fault Tree Analysis method. Three different risk reduction strategies are suggested in order to reduce the risk. Finally, the results are compared with each other and the best strategy is selected.