Abstract
The Typhoon Hagibis (the East Japan Typhoon of 2019) caused flooding in many areas, which also disrupted lifeline services such as electricity, gas and water supply. In this paper, I focus on the electric and gas utilities in the area along to the Chikuma River in Nagano Prefecture where the typhoon damages are particularly severe. And their damage and recovery processes are described with their impact-response relationships by reviewing the information from the central / local governments and these service providers. The maximum number of houses that were outages of electricity and gas were respectively about 63,500 (electricity) and about 900 (gas) in and around the Nagano City, in the early morning of October 13 2019, immediately after the Chikuma River breaching. According to my findings, most of these damages are caused by the failures of supply facilities such as electrical substations and gas pressure governors due to being submerged in flooded water. Furthermore, in order to mitigate these outages of electricity and gas supplies, I could suggest that the preparedness measures preventing from flooded water are important not only for each of the aboveground facilities, but also for their connecting apparatuses via their supplying networks.
