Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/44680
標題: Use of stable water isotopes to assess sources and influences of slope groundwater on slope failure
作者: Peng, T.R.
彭宗仁
Wang, C.H.
Hsu, S.M.
Chen, N.C.
Su, T.W.
Lee, J.F.
關鍵字: stable water isotopes
slope groundwater source
slope failure
reservoir leakage
Taiwan
o-18
landslides
deuterium
river
identification
precipitation
hydrogen
tracers
taiwan
turkey
期刊/報告no:: Hydrological Processes, Volume 26, Issue 3, Page(s) 345-355.
摘要: This study employs stable oxygen and hydrogen isotopes as natural tracers to assess the headwater of a landslide next to a drainage divide and the importance of the slope's headwater in the study area. The study is undertaken near Wu-She Township in the mountains of central Taiwan. Because a reservoir is located on the other side of the divide, this study evaluates the relationship between the reservoir water and headwater of the landslide as well. Over a 1-year period, water samples from September 2008 to September 2009, including local precipitation (LP), Wu-She Reservoir's water (WSRW), slope groundwater (SGW), upper-reach stream water (USTW), and down-reach stream water (DSTW), were analysed for deuterium (delta D) and oxygen (delta O-18) stable isotopes. Results indicate that WSRW is the predominant component in SGW: approximately 70% of SGW originates from WSRW and 30% from LP based on a two end-member mass-balance mixing model for delta O-18. The similar two end-member mixing model is also employed to assess the contributions of USTW and SGW to DSTW. Model results indicate that SGW is the major source of DSTW with a contribution of about 67%. Accordingly, about 47% of DSTW sources from the WSRW. In short, owing to reservoir leakage, WSRW contributes the greater part of both SGW and DSTW. Plentiful WSRW in SGW threatens the stability of the slope in the divide area. To avoid subsequent continuous slope failure, necessary mitigation steps are required. Copyright (C) 2011 John Wiley & Sons, Ltd.
URI: http://hdl.handle.net/11455/44680
ISSN: 0885-6087
文章連結: http://dx.doi.org/10.1002/hyp.8130
Appears in Collections:土壤環境科學系

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