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| | Abstract | | Electromagnetic investigation and electrical resistance survey were performed in paddy field submerged in sea water due to the tsunami. The objective of this study was to grasp the effect on desalinization of paddy field and irrigation tank embankment using geophysical exploration. The distributions of electric conductivity were obtained from the results of electromagnetic investigation and electrical resistance survey. Electric conductivity of the soil was also obtained using soil EC sensor. As a result, it is found that the movement of salinity can be understood by the electromagnetic investigation. Considering workability that the wide range can be measured in a short time, the electromagnetic investigation is useful to grasp the distribution of the salinity concentration of paddy field. |
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