Estimation of specific storage and vertical hydraulic conductivity from depth-dependency of pore pressure responses to atmospheric loading

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  • 間隙水圧の気圧変動応答を用いた比貯留係数と鉛直方向の透水係数の評価方法の開発
  • カンゲキ スイアツ ノ キアツ ヘンドウ オウトウ オ モチイタ ヒ チョリュウ ケイスウ ト エンチョク ホウコウ ノ トウスイ ケイスウ ノ ヒョウカ ホウホウ ノ カイハツ

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A new method to estimate specific storage and vertical hydraulic conductivity from pore pressure responses to atmospheric loading obtained at multiple depth intervals was developed. This makes it possible to estimate these physical properties even in the case where an unsaturated zone overlies the target formation, which have been difficult or impossible until now We developed a device to monitor pore pressures at multiple depth intervals in a single borehole. Atmospheric responses obtained by the developed device were successfully applied to the proposed method, and it was found that our method was applicable to obtain physical properties of the formation within practically allowable errors.

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