There are many landfill sites consisting mainly of combustion residuals in Japan. The disposed materials are chemically unstable. Therefore, temporal changes of waste deposit conditions must be monitored for environmental management of landfill sites. Electrochemical properties of leachate and the relationships between the leachate properties and the resistivities of strata were studied in such landfill sites. In addition, incineration ashes immersed in distilled water were prepared and the temporal changes of electrochemical properties of the solution were examined. In composition, the ashes used in the experiment are similar to those disposed in the above sites. From the above results, the electrochemical properties of waste deposits consisting mainly of combustion residuals have been studied and the efficiency for managing landfill sites by resistivity measurements has been established.
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