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年度	105	專案性質	實驗性質
專案類別	研究專案	研究主題	整治
申請機構	國立交通大學	申請系所	防災與水環境研究中心
專案主持人	林志平	職等/職稱	教授
專案中文名稱	地電阻影像探測監控土壤與地下水污染整治的技術發展
中文關鍵字	地電阻影像探測監測化技術; 孔內電極; 土壤與地下水汙染整治
專案英文名稱	Development of Electrical Resistivity Tomography Monitoring Technique in Monitroing the remediation of soil and ground water contaimination
英文關鍵字	ERT, borehole electrode, remediation of soil and ground water contaimination
執行金額	1,100,000元
執行期間	2015/11/17 至 2016/11/16
計畫中文摘要	近期國內土壤與地下水研究進入實場整治階段，整治藥劑的灌入狀況為整治成效的重要步驟，但在滲透性差之地層中，重力或加壓方式勢必造成整治藥劑僅會沿優勢流徑（如砂層）傳輸，除容易流失藥劑，亦無法改善已擴散進入坋黏土層之污染溶質，造成持久性污染而持續影響周遭地下水。為求有最佳整治效果，整治者可以根據藥劑擴散半徑適時調整整治參數達到最佳效益，所以對於藥劑灌入的傳輸路徑監測非常重要。在藥劑傳輸路徑的監測上，利用量測地層電學性質之地電阻影像探測法進行是極具效益的方法，將此技術搭配既有標準監測井進行孔內施測可有助解決其單在地表施測會有深度解析能力較為不足的問題，但其現場施作之最佳參數目前並未有最佳的應用準則，此外，為可採用既有標準監測井進行施測，發展可重複使用的移動式電極具有其實用性，因此本計畫之主要目的有二：1. 電極排列方式的優化探討2. 移動式孔內電極的研發。本研究最終將前述研發成果擇一試驗場址，利用地電阻影像探測方法監測藥劑在低滲透地層中的傳輸範圍與路徑，並測試移動式孔內電極的現地應用效果。以模組化之方式研發出第一代之移動式孔內電極雛形，具有簡便延長展距，與便利局部更換之優點，現場測試具備現地適用性；電極排列方式之優化由數模之結果顯示孔對地之施測建議採用地表合併孔內wenner-schlumberger序列施作，地表測線與鑽孔長度建議以1:1為主，增加地表測線長度對施測成效之助益不大。
計畫英文摘要	Currently the study of soil and ground water contamination in Taiwan has recently initiated in-situ remediation phase. The distribution of the chemical agents after injection is a key factor for the remediation effectiveness. In practice, however, injection into low conductivity layer (such as silt-clay layers) is difficult as most of the treating agents would most likely be dispersed into high conductivity layer (for example, sandy layers). Consequently the contaminant within silty or clayey layers could not be easily remediated and would continuously affect the underground water environment. In order to enhance site remediation effectiveness, site operators can adjust the parameters of the injection plan according to the in-situ monitoring result on the dispersed radius of chemical agents. Electrical Resistivity Tomography (ERT) is an effective geophysical technique to monitor the distribution of in-situ injection by measuring the electrical properties distribution of the underlying ground layers. Conducting both surface ERT and borehole ERT within existing monitoring wells can greatly increase the resolution in depth compared to conventional surface ERT survey. However, proper application guideline for optimizing field survey parameters is not readily available yet. Moreover, with the intention of utilizing the existing monitoring well for borehole ERT survey, a recoverable borehole electrode and cable should be developed for economical and convenience purpose. Aim of this project is to 1. Study the optimized field parameters of electrode array setup 2. Develop a recoverable and mobile borehole electrode and cable. This project examine the aforementioned study in an in-situ contaminated site, by applying ERT to monitor the dispersed region and path and examine the in-situ application recoverable borehole electrode-cable system.