The Mizunami Underground Research Laboratory (MIU) is now under construction by the Japan Atomic Energy Agency in the Tono area of central Japan. The MIU project is being implemented in three overlapping Phases: Surface-based Investigation (Phase I), Construction (Phase II) and Operation (Phase III). The changes of groundwater pressure due to shaft excavation can be considered analogous to a large-scale pumping test. Therefore, there is the possibility that the site scale groundwater field (several km square) can be approximated by the long-term groundwater pressure monitoring data from Phase II. Based on the monitoring observations, hydrogeological characteristics were estimated using the s-log(t/r2) plot based on the Cooper-Jacob straight line method. Results of the s-log(t/r2) plots are as follows. The groundwater flow field around the MIU construction site is separated into domains by an impermeable fault. In other words, the fault is a hydraulic barrier. Hydraulic conductivity calculated from s-log(t/r2) plots are in the order of 1.0E−7(m/s). The above results from the long term monitoring during Phase II are a verification of the hydrogeological characteristics determined in the Phase I investigations.
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ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management
October 3–7, 2010
Tsukuba, Japan
Conference Sponsors:
- Nuclear Engineering Division and Environmental Engineering Division
ISBN:
978-0-7918-5453-2
PROCEEDINGS PAPER
Hydrogeological Characterization Based on Long Term Groundwater Pressure Monitoring Available to Purchase
Shuji Daimaru,
Shuji Daimaru
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
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Ryuji Takeuchi,
Ryuji Takeuchi
Japan Atomic Energy Agency, Gifu, Japan
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Masaki Takeda,
Masaki Takeda
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
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Masayuki Ishibashi
Masayuki Ishibashi
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
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Shuji Daimaru
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
Ryuji Takeuchi
Japan Atomic Energy Agency, Gifu, Japan
Masaki Takeda
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
Masayuki Ishibashi
Japan Atomic Energy Agency, Mizunami, Gifu, Japan
Paper No:
ICEM2010-40064, pp. 149-158; 10 pages
Published Online:
April 5, 2011
Citation
Daimaru, S, Takeuchi, R, Takeda, M, & Ishibashi, M. "Hydrogeological Characterization Based on Long Term Groundwater Pressure Monitoring." Proceedings of the ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management. ASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, Volume 2. Tsukuba, Japan. October 3–7, 2010. pp. 149-158. ASME. https://doi.org/10.1115/ICEM2010-40064
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