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Hydrochemical disturbances measured in groundwater during the construction and operation of a large-scale underground facility in deep crystalline rock in Japan

日本の結晶質岩における大規模地下施設建設・操業時の周辺地下水の地球化学変化

岩月 輝希; 萩原 大樹; 大森 一秋; 宗本 隆志; 尾上 博則

Iwatsuki, Teruki; Hagiwara, Hiroki; Omori, Kazuaki; Munemoto, Takashi; Onoe, Hironori

岐阜県瑞浪市の超深地層研究所において、深度500mまでの坑道掘削及び維持管理時の地下水の水理・化学変化の観測を行った。その結果、水位低下や深部地下水の湧昇に伴う地下水の水質変化とそのプロセスを把握することができた。また、観測結果から大規模地下施設を結晶質岩に建設する時の留意点を整理することができた。

Changes of hydrochemical condition resulting from large-scale underground facility construction to 500 m depth in sedimentary and granitic rock were evaluated at the Mizunami Underground Research Laboratory (MIU), Japan. The investigation of hydrochemical impact around the facility suggests that an understanding of hydrogeological structures, including hydrogeological compartments prior to facility construction and the locating of shafts/galleries in low permeability rock area is essential to minimize hydrochemical disturbances.

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パーセンタイル:24.01

分野:Environmental Sciences

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