Electrical resistivity tomography (ERT), single-point-resistance logging with time-lapse, and geological and groundwater level data, are utilized to determine the mechanism of, and a hydrogeological model of, the Gangxianlane landslide in the west-central part of Taiwan. The rock surface and geometry of the colluviums were found by integrating ERT and borehole data. The iso-resistivity line in the bedrock broadly followed the bedding plane, indicating that the contribution of lithology to resistivity exceeds that of groundwater. The results of single-point-resistance logging with time-lapse and borehole data reveal that the bedrock has low permeability, which is associated with poorly developed joints and fractures. The fine grain content part (including the clayey layer), almost parallel to the bedding plane of the bedrock and between the colluvium and the bedrock in the upper part of the landslide, served as the slip surface and is believed to have been recently produced. It can block and retain water in the colluviums. Accordingly, this slip surface has the potential to re-slip in the future. Another slope failure involved rock collapse by a well-developed open release joint close to the Huoshaoping Terrace. It is also related to groundwater flow over a large gradient from the Huoshaoping Terrace. It is a key to determining whether this landslide will expand in the future.
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Earth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, SendaiEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Mukuhira Y.
Fuse K.
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Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, SendaiEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Fuse K.
Naoi M.
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Department of Civil and Earth Resources Engineering, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura Cluster-C, Nishikyo-ku, KyotoEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Naoi M.
Fehler M.C.
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Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, SendaiEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Fehler M.C.
Moriya H.
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School of Engineering, Tohoku University, 6-6-04 Aramaki aza aoba, Aoba-ku, SendaiEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Moriya H.
Ito T.
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Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, SendaiEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Ito T.
Asanuma H.
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Fukushima Renewable Energy Institute (FREA), National Institute of Advanced Industrial Science and Technology (AIST), 2-2-9 Machiikedai, Koriyama, FukushimaEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
Asanuma H.
Häring M.O.
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Häring GeoProject, Schwieriweg 16, LiestalEarth Resources Laboratory, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, 02139-4307, MA
机构:
Korea Inst Geosci & Mineral Resources, Geol Div, Daejeon 34132, South KoreaKorea Inst Geosci & Mineral Resources, Geol Div, Daejeon 34132, South Korea
Lee, Seung-Gu
Tanaka, Tsuyoshi
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Dept Earth & Environm Sci, Nagoya, Aichi 4648601, JapanKorea Inst Geosci & Mineral Resources, Geol Div, Daejeon 34132, South Korea