DEVELOPMENT OF QUANTITATIVE ESTIMATION OF LIFELINE DAMAGE BY FLOOD

Abstract

It has been recognized that disruption of lifeline by floods causes very serious damage on our society, from the experiences of the past flood disasters. Therefore, it is important to quantitatively estimate the flood damage in terms of lifeline disruption, in order to understand the potential flood damage. However, there are only few cases to estimate the quantitative flood damage in terms of lifeline disruption, because the mechanism of network from a supplier to a user is very complicated. The damage in terms of lifeline disruption is considered practically neither in the flood project evaluation nor in the flood risk analysis.

In this study, we developed the methodology to simply calculate the number of the affected people by disruption of electric power and gas based on the simulated inundation depth. By the methodology, flood risk can be evaluated in terms of disruption of lifeline.