譚義績2006-07-252018-06-292006-07-252018-06-2920022002-07-31http://ntur.lib.ntu.edu.tw//handle/246246/10734本研究研發一套簡易黏彈力學來探討集集大地震後地下水位之 變化。假設孔隙水在地震期間在受壓含水層之地下水運動不能將水排 出地層之情況之下推導出液相之動量方程式。 本模式收集濁水溪沖積扇目前水利著所建置之密集觀測網之資 料，在地震發生之後之水位變化與黏彈模式分析之結果十分接近，其 結果更顯示黏性係數與水力傳導係數十分密切之相關性。 根據中央地質調查所岩心鑽探，地下水位在地震前後變化較大之 區域多為礫石與細砂之交接面，根據現地資料與模式分析結果更顯示 地震時地下水位之變化多寡與水文地質環境有密切關聯性。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.application/pdf2225652 bytesapplication/pdfzh-TW國立臺灣大學生物環境系統工程學系暨研究所集集大地震地下水位變化黏彈模式孔隙介質Chi-Chi earthquakeGroundwater level changes in wellsVisco-elastic modelPorous mediareporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/10734/1/902625Z002025.pdf