CHARACTERISTICS OF UNCONFINED AND CONFINED GROUNDWATER LEVEL FLUCTUATION IN TOKYO BY THE 2011 OFF THE PACIFIC COAST OF TOHOKU EARTHQUAKE
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- ISHIHARA Shigeyuki
- Tokyo Metropolitan Government Civil Engineering Support and Training Center
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- KAWAMURA Akira
- Tokyo Metropolitan University
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- AMAGUCHI Hideo
- Tokyo Metropolitan University
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- TAKASAKI Tadakatsu
- Tokyo Metropolitan Government Civil Engineering Support and Training Center
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- KAWAI Masafumi
- Tokyo Metropolitan Government Civil Engineering Support and Training Center
Bibliographic Information
- Other Title
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- 東北地方太平洋沖地震に伴う東京における不圧・被圧地下水位の変動特性
Abstract
Groundwater observation wells have been bored in 42 sites in Tokyo Metropolis by the Civil Engineering Support and Training Center of Tokyo Metropolitan Government. Large fluctuations of unconfined and confined groundwater levels in Tokyo were observed following the 2011 off the Pacific coast of Tohoku earthquake. In this study, the characteristics of unconfined and confined groundwater level fluctuation caused by the earthquake were investigated. As for the results, three and seven fluctuation patterns were identified for the unconfined and confined groundwater levels, respectively. The increase after short drawdown was a major pattern for the confined groundwater levels, whereas no change in pattern was observed for about 70% of the unconfined groundwater levels. The causes of those patterns were additionally outlined in this study.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 68 (4), I_595-I_600, 2012
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001205352100096
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- NII Article ID
- 130004557722
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- ISSN
- 2185467X
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed