Keywords: natural disasters, critical infrastructures, interdependences, resiliency factors, modelling, supply infrastructure, communication infrastructure, transportation infrastructures, electricity industry, water industry, gas industry, communications, internet, telephone networks, road networks, Japan, earthquakes, infrastructure damage
Modelling the interdependencies of critical infrastructures during natural disasters: a case of supply, communication and transportation infrastructures
This paper introduces the methodological challenge of identifying and quantifying the interdependencies among several critical infrastructures. First, interdependency structures during a natural disaster are modelled-based on past events, considering supply (electricity, water and gas), communication (internet and telephone) and transportation infrastructures (road networks). Interdependencies are defined with respect to physical, functional and socioeconomic interrelationships. A quantification strategy is then introduced based on empirical surveys and economic models. As a case study, the developed model is applied to the 2004 Mid-Niigata Earthquake, which severely damaged infrastructure systems in the central mountainous area of Japan.