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Journal Article

Citation

Okumura H, Matsumoto T, Koyama K, Noguchi S. J. Jpn. Soc. Dam Eng. 2015; 25(2): 99-104.

Vernacular Title

平成23年3月東北地方太平洋沖地震沼原ダム災害対応記録

Copyright

(Copyright © 2015, Japan Society of Dam Engineers)

DOI

10.11315/jsde.25.99

PMID

unavailable

Abstract

On 11th March 2011, the 2011 Tohoku Earthquake occured. The Earthquake caused some cracks, total length of which reached to 1,547m, in the asphaltic facing of Numappara Dam which J POWER owns. After the earthquake, water leakage through the cracks increased and then the dam water level was drawn down immediately in control. We just managed to succeed in the crisis response of the reservoir water leakage and it is greatly desiable to share empirical knowledge for possible crisis management in the future. With such a backgroud, we have edited the "Record of Crisis Response in Numappara Dam on the 2011 Tohoku Earthquake". This paper shows the outline of the damages, our actions taken just after the earthquake and konwledge learned from this crisis.



Language: ja

Vernacular Abstract

平成23年3月11日の東北地方太平洋沖地震により,電源開発株式会社の沼原発電所沼原ダムのアスファルト表面遮水壁に総延長1,547mのクラックが生じ,漏水量が急増した。現地の電力所,管轄する東日本支店(埼玉県)および本店(東京都)は対応を協議し,同日ダム水位の緊急低下を決定し,実行することによりダムの安全性を確保した。電源開発株式会社は,この災害対応の経験を共有するとともに,得られた教訓を今後の非常時対応に活かすことを目的として記録を作成した。本稿は,災害の概要,災害対応および得られた教訓について報告するものである。

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