應用地電法探測掩埋實驗場滲漏之研究

本研究使用洩漏電流法與地電阻影像剖面法於掩埋實驗場進行研究，針對掩埋場最常發生的垃圾水滲漏的監測，目前國內對於垃圾掩埋場的滲漏監測，僅止於掩埋場的上下游設置監測井，對於滲漏的監測並無即時性的機制。本研究係利用地電法來監測不透水布完整性，已達到即時監測與後續破損修補之依據。於掩埋實驗場址內模擬破洞滲漏狀況，以人工製造多處破損並比較洩漏電流法與地電阻影像剖面法之成果比對，結果顯示滲漏電流法在不透水布完整性的即時監測上，有著快速與良好的成效，而破損處的範圍可配合改變電極間距的反算，更精確的定出破損處的位置。地電阻影像剖面法用於掩埋場以四極法為佳，其成果可明顯界定出不透水布深度與界定滲漏風險較高的區域。併合兩種方法對於掩埋場滲漏問題監測將可提供更多更有效的資訊。

關鍵字

地電阻影像剖面法；洩漏電流法；滲漏

並列摘要

Both leakage current method and electrical resistivity tomography were applied to investigate the testing waste landfill site to monitor the most frequently occurring leachate leakage problems. The current way for monitoring landfill leachate leakage only limited on the installation of the upstream and downstream monitoring wells. However, there is no immediate system for leachate leakage monitoring. Therefore, this study used geoelectrical methods to monitor the completeness of the high-density polyethylene (HDPE), which shows it had reach immediate monitoring and while collecting facts for follow up damage repair. In order to simulate the leakage situation in the waste landfill site we made many breakages and compared the results of both leakage current method and electrical resistivity tomography method. The leakage current method showed immediate and efficient monitoring result. By changing the interval of electrodes, the locations of breakage can be defined more exactly. The electrical resistivity tomography showed a better result by using Wenner-Schlumberger array for waste landfill sites. The results can significantly define the depth of the HDPE and the high risk areas. Combining these two methods can provide more information about the landfill leakage problems.