報告書番号

U03061

タイトル（和文）

災害時における供給系ライフライン途絶の被害影響に関する調査 --東海地域の製造業を対象としたアンケート調査結果--

タイトル（英文）

Economic impact of lifeline disruptions after natural disasters - A questionnaire survey to industries in Tokai Area -

概要 （図表や脚注は「報告書全文」に掲載しております）

本調査報告は，巨大地震発生確率の高まりが指摘されている東海地域を対象として，自然災害発生時における供給系ライフライン（電力，水道，都市ガス）途絶の経済的影響ならびに防災対策の実態を調査・分析したものである．製造業264社からの回答を分析した結果，ライフラインが途絶した場合でも，自家発電機，プロパンガス，地下水によって生産活動を継続可能と答えた企業が、それぞれ1.8%、48%、18%あった．一方，ガスや水道が途絶した場合には、電力供給を行ったとしても生産活動を継続できないと答えた企業が24.6%存在し，平常時の停電の影響とは異なる特徴を有することが明らかとなった．

概要 （英文）

In order to clarify economic impacts of disruption of lifelines (electricity, water and gas) caused by earthquake disasters, we conducted a questionnaire survey in Tokai area of Japan, where the researches have been showing high possibility of a large earthquake occurrence in the near future. We designed a questionnaire form asking influences of disruptions of electricity, water, gas and their simultaneous occurrence on production, and sent it to 2000 companies in Tokay area. The analysis on 264 replies to the questionnaire showed following results:1.Even under lifeline disruptions, some companies can keep production using a backup electricity generator (introduced by 1.8% of total number of companies), propane gas (46%) and underground water (18%).2.Even if electricity supply is maintained, disruptions on water and gas make considerable number of companies (24.6%) stop production. This is a distinguished feature of the disruptions caused by natural disasters which is differs from ordinary situations. 3.Resiliency coefficients of electric machinery sector and steel sector showed lowest resiliency coefficients (i.e. production level evaluated between 0 and 1 under the lifeline disruption) for water and gas disruptions. This implies that disruptions of electricity supply have fewer influences on these industry sectors compared to other sectors. 4.Considerable number of companies (42%) approved an alternative electricity supply policy that promises 5 days earlier restart after earthquakes with 500% costs.

報告者

キーワード