行政院國家科學委員會專題研究計畫成果報告:土石流監測與預警系統之研究─子計畫:雨量與地下水電導度（EC）監測方法之研究（III）
Date Issued
2004
2004-07-31
Date
2004
2004-07-31
Author(s)
DOI
922625Z002025
Abstract
The main purpose of this study is to investigate the relationships
among ion concentration 、electrical conductivity (EC) of groundwater
and debris flow occurrence. During typhoon season, very frequently,
heavy rainfall resulted in the rise of groundwater table, unstability and the
failure of the slope. Accordingly, in this study, the test site was
investigated and flumes for seepage flow tests were designed.
The site of this study was selected at Ba-Dou-Tze in Keelung.
Therefore, the soil samples for the tests were collected from the site. After
the soil samples were prepared in the flumes, the seepage flow and slope
stability tests were then conducted to investigate the variation of the ion
concentration and the electrical conductivity (EC) of groundwater while
the soil slopes failed. Meanwhile, the feasibility for observing the ion
concentration and EC of groundwater was also evaluated. The results
showed that while the groundwater table increased before the soil slope
failed, the concentration of SO4
2- and Mg2+ increased, however, the
concentration of Na+ decreased.
Subjects
debris flow
groundwater
ion concentration
electrical conductivity
seepage flow
water quality test
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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