| 講演要旨(和文) | | TDR法等のプローブを用いた方法では測定が困難な砂礫質地盤を対象として、電磁気特性と体積含水率および溶液中のECの関係を明らかにするために、小型地中レーダを用いた電磁気特性測定装置を試作した。既知のECの水溶液を測定した結果、本装置により測定される媒体の比誘電率およびECが、理論的に矛盾しない値であること確認された。また、砂礫質地盤試料の比誘電率の平方根と体積含水率との間に線形関係が成り立つこと、測定された土壌全体のECと土壌溶液中のECの関係式としてRhoades式が適合することが明らかとなった。 |
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| | 講演要旨(英文) | | The precise understanding of the water and solute transport in a vadose zone are quite important in environmental science and engineering but are difficult due to the lack of proper monitoring techniques. In this study, we suggested a new monitoring technique for water content and electrical conductivity of soil solution in sand gravel layer, in which it is hard to monitor water and solute transport by conventional monitoring methods, using a small ground penetrating radar system. We confirmed that our technique is applicable not only to laboratory experiments, but also to the field monitoring. The technique could be an unprecedented in-situ monitoring technique of water and solute transport in sand gravel layers. |
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