1983年日本海中部地震に伴う世帯レベルの被災・復旧過程に関する調査

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タイトル別名
  • A Household Survey on Damaging and Restoring Processes due to the 1983 Central Japan Sea Earthquake
  • 1983ネン ニホンカイ チュウブ ジシン ニ トモナウ セタイ レベル ノ

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抄録

At the 1983 May 26 Central Japan Sea earthquake (M=7.7), dwelling and agricultural facilities were severely damaged by sandy soil liquefaction in rural town Wakami, Akita prefecture. This paper presents how each household was affected by and responded to the earthquake disaster for a considerable period of time. Waiting for 6 months after the earthquake, a questionnaire survey was performed for all the 2198 households and interviews were made supplementally for the seriously affected 161 households. The questionnaire asks characteristics of family and housing, damage to dwelling, damage to farming, fishing, shops and so on, effects on daily life after the quake, economic impact, and surrounding conditions related to seismic intensity.<br>The results obtained are as follows.<br>1) Distribution of dwelling damage along 20km within the town, distinctly different between the northern and southern parts, is similar to those of seismic intensity and gas pipe damage. Micro topography of dune and coastal plain amplifies the damage.<br>2) Severe damage to rice field in the northern part of the town resulted in decrease of harvest. Damages to farm land and dwelling are economically equivalent and together amount to 60% of annual income there.<br>3) Methods to repair a dwelling depend mostly upon degree of damage, partially upon building age and insurance payment. Reconstruction costs ¥15 million in average and tends to make houses larger than before. However needy families find it difficult to get proper fund for restoration and suffer from insufficient repairing.<br>4) Economic loss is covered far more by public or private loans than by insurance payment. Among ¥2.9 billion of total direct damage to households in the town, only 18% can be paid by insurance. Economical hardship is likely to last for decades.<br>5) It takes from one week to one month to resettle surroundings, to recover gas supply and to return to daily lives. Repair of houses starts later and finishes 4 months after the quake in average. Repair works of dwellings scatter largely from just after the quake to late fall. Some were still waiting for the next spring. Reconstruction takes about 121 days in average and many families stay in temporary housing.

収録刊行物

  • 地震　第２輯

    地震　第２輯 38 (4), 485-496, 1985

    公益社団法人 日本地震学会

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