学会誌「自然災害科学」
自然災害科学42 Vol.16,No.2, 1997, p107f
【速報】[Preliminary Report]
1997年7月鹿児島県出水市針原川土石流災害
1997 Debris Flow Disaster along the Harihara River, Izumi City, Kagoshima Prefecture, Japan
岩松 暉*
Akira IWAMATSU*
Abstract
Severe debris flow disaster occurred along the Harihara River, Izumi City, Kagoshima Prefecture at midnight of June 10, 1997. 21 persons were killed and 18 houses were destroyed by the debris flow. Pleistocene volcanic breccias are widely distributed in the vicinity of the Harihara district. Matrices of these rocks have been greatly altered to very soft clay by superficial weathering. And thick slope sediments which consist of talus deposits with huge boulders and core stones of onion structure crop out in the landslide area. Collapsed slope sediments rushed into farm pond beneath the slope, and water satsurated debris changed into debris flow.
キーワード:
梅雨前線豪雨，土石流，出水市，針原川，火山角礫岩
Key words:
heavy rain, debris flow, Izumi City, Harihara river, volcanic breccia
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鹿児島大学理学部Faculty of Science, Kagoshima University