| 講演要旨(和文) | | ため池堤体の下流に湧水が認められた場合，地下浸透水に貯水の寄与があるかどうか，その起源の解明が重要である．このための一般的な調査法としては湧水量の変化と貯水位および気象状況との比較や湧水の水質分析などがあげられる．さらに対策工の検討のためには地下浸透水の流動経路を把握する必要がある．本研究では，ボーリング孔を利用した塩水トレーサ試験に比抵抗法２次元探査の繰り返しによる比抵抗モニタリングを併用し，地盤の比抵抗変化から塩水トレーサの浸透経路の推定を試みた． |
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| | 講演要旨(英文) | | When spring water is admitted in the downstream of the small earth dam, the clarification of the origin of the underseepage water is important. General investigations for this purpose are a comparison among change of amount of spring water, reservoir level and weather condition, and water analyses etc. In addition, it is necessary to clarify the hydrological flowpath of the underseepage water for the examination of the countermeasure. In this research, we conducted the resistivity monitoring by the repetition of the 2D resistivity survey together with the salt water tracer test using the boreholes, and tried the presumption of the salt water infiltration path from the resistivity change in the ground. |
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