초록

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Abstract ▼ AI-Helper

Schlumberger electrical soundings and Coincident loop time-domain electromagnetic soundings were made on the Nanji-do landfill to investigate the nature of fills and the subsurface structure. The measured data were transformed into apparent resistivity values and then inverted in terms of 1-D resist...

Schlumberger electrical soundings and Coincident loop time-domain electromagnetic soundings were made on the Nanji-do landfill to investigate the nature of fills and the subsurface structure. The measured data were transformed into apparent resistivity values and then inverted in terms of 1-D resistivity models. At 6 points, both measurements were carried out to check the validity of the interpreted subsurface electrical structures. Interpreted layered models from each method show a good agreement. Obtained models show that a conductive zone exist below the shallow resistive zone. Conductive zone, which is considered to be influenced by decomposition of organic waste materials and infiltration of precipitation, is terminated by resistive zone which is considered as basement. Considering the fact that conductive zone extends to the basement and there exist no barrier layers such as clay layers, contaminant plumes are likely to flow into the groundwater directly.