| 講演要旨(和文) | | 津波の浸漬があった岩手県陸前高田市小友町の水田において，電磁探査と電気探査を行った．この研究は水田の除塩効果を効果を把握することを目的としている．電磁探査と電気探査より電気伝導度の分布図を得た．また，土壌ECセンサにより表土とハンドオーガーで採取土の電気伝導度を得た．その結果，電磁探査により塩分の深部への移動や流出による消失を把握することができ，広範囲を短時間で計測できる作業性を考慮すると，水田の塩分濃度分布を把握する場合，電磁探査が優位であると考えられる． |
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| | 講演要旨(英文) | | 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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