最大級の南海トラフ地震にょる津波を見据えたBIA及びRAに基づく浄水施設の事業継続戦略構築一大阪市水道局を事例として一

摘要

This paper intends to develop a business continuity plan for a water treatment facility based on the business impact analysis (BIA) and the risk assessment (RA). We considered a loss of water treatment function by the BIA, which is critical for the water supply system. Then, we conducted a RA for a severer tsunami caused by the expanded Nankai trough earthquake scenario. For development of business continuity plan, we initially identified the following two tsunami risk types: water pollution and damage resulted from flooding. Then, we considered the time limitation and location of the expected damaged water treatment facilities. Additionally, we made a resource allocation which pointed out the shortage of resources. Finally, we examined the effectiveness of these findings in a table-top exercise before compiling the formal business continuity plan.