Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan

Wen Chi Lai; Naoji Koizumi; Norio Matsumoto; Yuichi Kitagawa; Ching Wee Lin; Chjeng Lun Shieh; Youe Ping Lee

doi:10.1186/BF03352534

Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan

Wen Chi Lai, Naoji Koizumi, Norio Matsumoto, Yuichi Kitagawa, Ching Wee Lin, Chjeng Lun Shieh, Youe Ping Lee

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

The groundwater level changes induced by the 1999 Chi-Chi earthquake were well recorded at the monitoring wells in and around the Choshui River alluvial fan, Taiwan, which is adjacent to the focal region. We analyzed the coseismic groundwater level changes related to the geological setting and seismic ground motion. In a typical fan area, the groundwater levels coseismically rose and those amplitudes increased as the ground acceleration and hydraulic conductivity became larger. In the slope area near the earthquake fault, the groundwater levels coseismically dropped and those amplitudes increased as the ground acceleration became larger. The liquefaction and permeability enhancement, whose degrees depend on the geological setting and seismic ground motion, might explain the characteristics of the coseismic groundwater level changes in the Choshui River alluvial fan.

Original language	English
Pages (from-to)	873-880
Number of pages	8
Journal	Earth, Planets and Space
Volume	56
Issue number	9
DOIs	https://doi.org/10.1186/BF03352534
Publication status	Published - 2004

All Science Journal Classification (ASJC) codes

Geology
Space and Planetary Science

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10.1186/BF03352534

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title = "Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan",

abstract = "The groundwater level changes induced by the 1999 Chi-Chi earthquake were well recorded at the monitoring wells in and around the Choshui River alluvial fan, Taiwan, which is adjacent to the focal region. We analyzed the coseismic groundwater level changes related to the geological setting and seismic ground motion. In a typical fan area, the groundwater levels coseismically rose and those amplitudes increased as the ground acceleration and hydraulic conductivity became larger. In the slope area near the earthquake fault, the groundwater levels coseismically dropped and those amplitudes increased as the ground acceleration became larger. The liquefaction and permeability enhancement, whose degrees depend on the geological setting and seismic ground motion, might explain the characteristics of the coseismic groundwater level changes in the Choshui River alluvial fan.",

author = "Lai, {Wen Chi} and Naoji Koizumi and Norio Matsumoto and Yuichi Kitagawa and Lin, {Ching Wee} and Shieh, {Chjeng Lun} and Lee, {Youe Ping}",

note = "Funding Information: 1Disaster Prevention Research Center, National Cheng Kung University, Taiwan, R.O.C. 2Tectono-Hydrology Research Group, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan 3Water Resources Agency, Ministry of Economic Affairs, Taiwan, R.O.C.",

year = "2004",

doi = "10.1186/BF03352534",

language = "English",

volume = "56",

pages = "873--880",

journal = "Earth, Planets and Space",

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T1 - Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan

AU - Lai, Wen Chi

AU - Koizumi, Naoji

AU - Matsumoto, Norio

AU - Kitagawa, Yuichi

AU - Lin, Ching Wee

AU - Shieh, Chjeng Lun

AU - Lee, Youe Ping

N1 - Funding Information: 1Disaster Prevention Research Center, National Cheng Kung University, Taiwan, R.O.C. 2Tectono-Hydrology Research Group, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan 3Water Resources Agency, Ministry of Economic Affairs, Taiwan, R.O.C.

PY - 2004

Y1 - 2004

N2 - The groundwater level changes induced by the 1999 Chi-Chi earthquake were well recorded at the monitoring wells in and around the Choshui River alluvial fan, Taiwan, which is adjacent to the focal region. We analyzed the coseismic groundwater level changes related to the geological setting and seismic ground motion. In a typical fan area, the groundwater levels coseismically rose and those amplitudes increased as the ground acceleration and hydraulic conductivity became larger. In the slope area near the earthquake fault, the groundwater levels coseismically dropped and those amplitudes increased as the ground acceleration became larger. The liquefaction and permeability enhancement, whose degrees depend on the geological setting and seismic ground motion, might explain the characteristics of the coseismic groundwater level changes in the Choshui River alluvial fan.

AB - The groundwater level changes induced by the 1999 Chi-Chi earthquake were well recorded at the monitoring wells in and around the Choshui River alluvial fan, Taiwan, which is adjacent to the focal region. We analyzed the coseismic groundwater level changes related to the geological setting and seismic ground motion. In a typical fan area, the groundwater levels coseismically rose and those amplitudes increased as the ground acceleration and hydraulic conductivity became larger. In the slope area near the earthquake fault, the groundwater levels coseismically dropped and those amplitudes increased as the ground acceleration became larger. The liquefaction and permeability enhancement, whose degrees depend on the geological setting and seismic ground motion, might explain the characteristics of the coseismic groundwater level changes in the Choshui River alluvial fan.

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Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan

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