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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
Effects of seismic ground motion and geological setting on the coseismic groundwater level changes caused by the 1999 Chi-Chi earthquake, Taiwan
- Source :
- Earth, Planets and Space; September 2004, Vol. 56 Issue: 9 p873-880, 8p
- Publication Year :
- 2004
-
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.
Details
- Language :
- English
- ISSN :
- 13438832 and 18805981
- Volume :
- 56
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- Earth, Planets and Space
- Publication Type :
- Periodical
- Accession number :
- ejs33279332
- Full Text :
- https://doi.org/10.1186/BF03352534