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十勝沖地震に伴う津波の河川遡上

最終更新 : 2003年9月30日

十勝川,新釧路川,沙流川,鵡川,2003年9月

十勝沖地震伴い発生した津波の河川遡上調査概要報告

Report on River-runup of Tsunami Generated by the Tokachi-oki Earthquake on 26 September, 2003

北海道開発土木研究所環境水工部河川研究室

Summary of the event


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Two strong earthquakes occurred off the southeastern coast of Hokkaido in northern Japan on 26 September 2003. The earthquakes gave various damage in the southeastern part of Hokkaido. A number of tsunamis associated with the earthquakes have been observed on the southern coast of Hokkaido as well as the northern part of Mainland. The characteristics of the tsunami are that the wave propagation exceptionally continued longer than a day because of the generation of edge wave, and the tsunami ascended many rivers as much as approximately 10 km away from its river mouth. In this site, the properties of the river-runup of the tsunami were discussed on the basis of the hydrographs of the water level and results of the field surveys on Tokachi river, Kusiro river, Saru river and Mu river.

1.調査概要

調査日時;2003年9月30日,10月4,5日
調査員;安田 浩保 研究員

1.調査結果概要