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Takeuchi, Shinji; Fujita, Yuji
JNC TN7450 2005-011, 23 Pages, 2005/09
JNC-TN7450-2005-011.pdf:0.74MB
The results for the single borehole hydraulic tests conducted as part of the Mizunami Underground Research Laboratory Project were tabulated. The details of each test (date, test interval, geology, etc.) as well as the interpreted hydraulic parameters and analytical method used are presented.
Takeuchi, Shinji; ; Fujita, Yuji
JNC TN7450 2005-010, 28 Pages, 2005/09
JNC-TN7450-2005-010.pdf:0.94MB
The results for the single borehole hydraulic tests conducted as part of the Regional Hydrogeological Study were tabulated. The details of each test (date, test interval, geology, etc.) as well as the interpreted hydraulic parameters and analytical method used are presented.
Tsuruta, Tadahiko; Fujita, Yuji; Abumi, Kensho; Mie, Hideki; Fujishiro, Hideyuki
JNC TN7400 2005-025, 82 Pages, 2005/08
JNC-TN7400-2005-025.pdf:8.63MB
The DH-15 borehole investigations were carried out to develop and apply a variety of geoscientific techniques for the geological and hydrogeological characterization of water conducting features and the rock mass. The main investigations performed were : Measurement of geochemical parameters of the drilling fluid and the return water, Coring, core logging and photographing of core, Borehole television observation, Geophysical logging, Fluid logging, Multi-offset VSP survey, Hydraulic tests, Measurement of geochemical parameters of the pumping water, and Installation of a long-term groundwater monitoring system. This report describes the results of the DH-15 borehole investigations with respect to the above results.
Fujita, Yuji
JNC TN7450 2005-001, 17 Pages, 2005/03
JNC-TN7450-2005-001.pdf:0.59MB
As part of the research activities at the Tono Geoscience Center, pore water pressure observations have been carried out in order to understand the variations in pressure due to natural pressure changes. Observed data is also used for hydrogeological modeling and groundwater flow simulations around the area. The observation boreholes are: DH-2 (PIEZO: DIA-Consultant), DH-7, DH-11, DH-13 (MP-System: Westbay Instruments Inc.) and DH-8, DH-10 (miniTROLL: In-Situ Inc.). The boreholes are 500 to 1,000m in depth. Observed pore water pressure data from July to September, 2004 is provided and the behavior of the pressure is discussed in this report. The performance issues of miniTROLL are also reported.In this quarter, some kinds of variation in pore water pressure were observed in some boreholes when the earthquake (Mj: 7.4) was occurred at the beginning of September. The earthquake is accompanied with foreshock and aftershock, the epicenters ware located at off-shore southwest of the Kii Peninsula.At DH-2, observation finished at September 8th. DH-2 was used by cross-hole tomography test, and PIEZO was removed.
Takeuchi, Ryuji; Fujita, Yuji; Arai, Yasushi; Walter, S.
no journal, ,
no abstracts in English
Tanaka, Shingo; Yokota, Hideharu; Motoshima, Takayuki*; Fujita, Yuji*
no journal, ,
no abstracts in English