行政院國家科學委員會專題研究計劃成果報告:水文對坡地災害因子潛勢影響分析─總計畫暨子計畫：震動引起孔隙水壓上升導致坡地崩坍影響之研究
Date Issued
2002
2002-07-31
Date
2002
2002-07-31
Author(s)
DOI
902625Z002025
Abstract
This study develops a simplified visco-elastic model to describe the ground water level changes in wells of Cho-Shui River alluvial fan after the Chi-Chi earthquakes in Taiwan. Assuming the porous media is undrained in a confined aquifer during the co-seismic period, an analytical solution is derived from the momentum equation of the liquid phase. The model was used to analyze the data collected over a high dense network of hydrologic monitoring wells in Cho-Shui River alluvial fan after the earthquakes. The simulated ground water level changes agree with the observed data. The result also showed that the viscosity coefficient of the model is strongly correlated to the hydraulic conductivity of the aquifer. According to the hydrogeological profiles provided by Central Geological Survey from the drilled cores, the highest groundwater level changes were located at the interface between the gravels and the sands in the confined aquifer. The field observation and the simulation result suggest the importance of hydrogeological conditions on the ground water changes during the Chi-chi earthquakes.
Subjects
Chi-Chi earthquake
Groundwater level changes in wells
Visco-elastic model
Porous media
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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902625Z002025.pdf
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