1985年の地すべり, 斜面崩壊, 落石の被害 : 玉の木地区(新潟県)の斜面崩壊による災害

概要

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A large-scale slope failure occurred at 18 : 25, February 15, 1985 at Tamanoki, Nishikubiki-gun, Niigata-ken. It buried 5 dwelling houses, a Shinto shrine and a Buddhist temple. Ten persons were killed and four persons were wounded by this disaster. The physical characteristics of the snowcover at the site and near the disaster area were investigated. In 1985, disasters by slope failures frequently occurred throughout the country as well as in Niigata-ken. In order to make clear the situation for the disaster at Tamanoki in the year, newspaper reports on the damages of landslides, slope failures and rock falls were collected. The number of the damaged area was 133; the casualties were 60 dead, 76 wounded. 70 dwelling houses and 13 undwelling houses were completely destroyed and other damageds were 83. By totalizing the monthly cases throughout Japan and comparing it with monthly precipitation, it was made clear that occurrences of landslides and others were concentrated on the snowmelt season, the Bai-u season and the rainy season in the autumn. Therefore, the slope failure in February was unusual and the causes seams to be dependent on local meteorological condition of the year.
独立行政法人防災科学技術研究所の論文
1988-03-23