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| | Abstract | | The objective of this study is to develop a useful monitoring method that can probe inner water behavior in landfilled wastes without destructing waste layers. To verify the effectiveness of resistivity method, time-lapse measurements of electrical resistivity tomography have been carried out by using large scale in-situ lysimeters filled with wastes for two years. In-situ lysimeters were built at two landfill sites for wastes located in Okayama and Saitama. The diameter of lysimeters is the same five meters in both sites diameter, the height is four meters in Okayama and seven meters in Saitama. Results of experiments shows that resistivity of wastes increased at the upper part of the lysimeters with time and the area of increased resistivity gradually expanded with time from the upper part to the lower part. It is considered that low resistive ingredients in wastes ware washed out by infiltrating water. Furthermore, the sign of high permeable zone was detected from the distribution of resistivity change ratio. |
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