文化大學機構典藏 CCUR:Item 987654321/2418
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    题名: Some isotopic and hydrological changes associated with the 1999 Chi-Chi earthquake, Taiwan
    作者: Wang, C.H.;Wang, C.Y.;Kuo, C.H.;Chen, W.F.
    贡献者: 地質學系
    日期: 2005
    上传时间: 2009-10-30 14:34:02 (UTC+8)
    摘要: The changes in the isotopic composition of, and the groundwater level in, the Choshui River alluvial fan near the ruptured Chelungpu Fault during and following the 1999 (M-w = 7.5) Chi-Chi earthquake in Taiwan are reported. Three aspects of the hydrological changes are noticed. First, following the Chi-Chi earthquake, the lower aquifers beneath the Choshui River fan showed a significant shift in isotopic composition towards that of the surface water in the Choshui River, suggesting enhanced exchanges of water between the river and the groundwater. Second, in some wells, water levels and isotopic compositions in different aquifers converged to the same respective values during the Chi-Chi earthquake, suggesting coseismic exchanges of water between the different aquifers, which implies enhanced permeability due perhaps to the fracturing and breaching of aquitards between the aquifers. Third, the pattern of the coseismic water-level response is distinctly different from that of the shift in the isotopic composition, suggesting that they were produced by different mechanisms.
    關聯: ISLAND ARC v.14 n.1 Pages: 37-54
    显示于类别:[地質系] 期刊論文

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