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年度	100	專案性質	實驗性質
專案類別	研究專案	研究主題	底泥
申請機構	清雲科技大學	申請系所	空間資訊與防災中心
專案主持人	鄭世楠	職等/職稱	教授
專案中文名稱	應用地球物理方法運用於污染場址與底泥電性反應之研究
中文關鍵字	地電阻影像剖面法；透地雷達法；感應電磁法；底泥
專案英文名稱
英文關鍵字	ERT；GPR；EM；Sediment
執行金額
執行期間	2011/11/26 至 2012/11/25
計畫中文摘要	現場調查已發現 DNAPL 仍具有穿透低滲透性地層（如黏土層或砏黏土）之風險； 或低滲透性地層經長年累月所累積的大量溶質回擴至高滲透性地層，造成調查與整治之 高度不確定性。而地下水污染團很可能透過滲漏機制而影響至上∕下含水層，因此在調 查或採樣設計上很可能需跳脫傳統僅採集至第一含水層底部或僅整治第一含水層的思 維；同時界定高、低滲透性地層分佈與評估周遭污染情形，才能確實達到污染防堵與監 控。傳統鑽孔調查技術所獲致之成果均屬於〝點〞的污染情形， DNAPL 移動分佈之高 度不確定性，或地下水溶解相在高、低滲透性地層之實際分佈，在實場運用上不太可能 鉅細靡遺地調查，也造成其污染界定上的困難。近年來，非破壞性地球物理探勘技術已 逐漸運用在污染場址之地下環境調查，搭配較少量的鑽孔資料可獲得〝面與空間〞資訊。 目前地球物理最廣泛運用之污染調查技術為地面式之地電阻掃瞄法及透地雷達法。但地 電阻掃瞄法施測會因建物阻擋或其他地面干擾物致施測距離不足，造成測深受限；透地 雷達法之測深則更是受限，特別是存在厚層鋪面或鋼筋網的施測環境。而新穎之地球物 理井測技術已開始應用於地下環境特徵調查，其在探測深度上更具優勢，並增加監測井 或鑽孔之利用效益。井測法可透過跨孔調查建立高、低滲透性地層、優勢流徑及可能污 染分佈等，並掃瞄評估不同時間序列之污染分佈、整治溶劑分佈及整治成效等。 本計畫除了運用新穎地球物理井測技術，調查含氯有機溶劑在地下環境之複雜分 佈，另利用感應電磁波與水上地電阻影像剖面法進行河川底泥沈積物調查，評估水上地 球物理方法之適用性與初步成果。
計畫英文摘要	Many site investigations have found that DNAPL is able to penetrate the low permeable layer such as clay or silt-caly layer in subsurface environment. The cumulated DNAPL within the low permeable Layer will gradually diffuse to the high permeable layer to affect he accuracy of investigation and remedial design. As to the deeper zone affected by the penetration of DNAPL, the conventional sampling design investigating only the first unconfined aquifer is no longer suitable for DNAPL investigation. Precisely define the boundary and the distribution of high and low permeable layer is the key to conduct a successful DNAPL investigation. 〝Point〞 information derived from the conventional bore-hole sampling is difficult to be used for locating the DNAPL pollution due to the uncertainty of DNAPL migration and the soluble-phase distribution of the DNAPL partitioned into ground water between the low and high permeable layer. Recently, non-invaded technologies such as geophysical technology have been introduced to provide the 〝plane and space〞 information of pollution in subsurface by integrating few bore-hole dates. The most common used geophysical technologies are ground-penetrating radar method (GPR) and electrical resistivity tomography (ERT). Both methods have their limitations on the pollution investigation when there are interferences exist such as building structure or heavy pavement. A new geophysical technology, geophysical well logging has been developed to overcome above limitations. The information of multi-wells logging could be used to interpret the permeability of subsurface, the dominate flow path and the hot-spot for evaluating the distribution of pollution and the efficiency of remediation in different time sequences. This study would first discuss how DNAPL and its soluble-phase components invade into the low permeable layer based on the field observation. Then, the importance of geophysical technology is introduced with comparing to the limitations of bore-hole investigation. Last, the case studies on using geophysical technologies including geophysical well logging are introduced to snapshot the complex profile of DNAPL distribution for improving future application.