Validation of surface-based hydrochemical investigation and the impact of underground facility construction at Horonobe URL
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- AMANO Yuki
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Horonobe Uniderground research Unit
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- NANJO Isao
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Horonobe Uniderground research Unit
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- MURAKAMI Hiroaki
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Horonobe Uniderground research Unit
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- YABUUCHI Satoshi
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Horonobe Uniderground research Unit
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- YOKOTA Hideharu
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Horonobe Uniderground research Unit
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- SASAKI Yoshito
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Geological Isolation Research Unit
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- IWATSUKI Teruki
- Japan Atomic Energy Agency, Geological Isolation Research and Development Directorate, Tono Geoscientific Research Unit
Bibliographic Information
- Other Title
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- 北海道幌延地域における深部地下水調査
- ホッカイドウ ホロノベ チイキ ニ オケル シンブ チカスイ チョウサ : チジョウ カラ ノ チキュウ カガク チョウサ ノ ダトウセイ ヒョウカ ト チカ シセツ ケンセツ ニ トモナウ チキュウ カガク トクセイ ヘンカ
- －地上からの地球化学調査の妥当性評価と地下施設建設に伴う地球化学特性変化－
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Abstract
We verified the surface-based hydrochemical investigation for deep underground at Horonobe Underground Research Laboratory (URL) at Horonobe, Hokkaido, Japan, and identified the hydrochemical changes during the URL construction. The evaluation of the relationship between the number of boreholes and understanding of water chemistry suggests that three basic borehole investigations and an additional borehole for high permeable geological zone (fault and fractured zone) are required to illustrate cross-sectional hydrochemical distribution including the uncertainty for kilometers scale survey line. The observation and numerical analysis of hydrochemical variation (salinity, pH, ORP) around the URL indicate that the groundwater pressure and the salinity in the vicinity of high permeable geological zone are varying due to groundwater inflow into the drift. The variation was consistent with the prediction reported previously. These results are considered to be referred to the management during surface-based investigation and construction of underground facility at the other sedimentary rock area.
Journal
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- Journal of Groundwater Hydrology
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Journal of Groundwater Hydrology 54 (4), 207-228, 2012
Japanese Association of Groundwater Hydrology
