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Horikawa, Shigeo*; Sasaki, Takeshi*; Koshigai, Masaru*; Fukushima, Shigeru; Ohara, Yoshiyuki
no journal, ,
no abstracts in English
Niwa, Masakazu; Sanga, Tomoji*; Komatsu, Tetsuya; Onoe, Hironori; Matsuoka, Toshiyuki
no journal, ,
Numerical simulation of landform changes were performed for the reconstructed paleotopography at 450 ka. In this simulation, landform changes are described based on the algorism concerning sediment transport and deposition in rivers. Simulated topography showed a good agreement with present real topography. This suggests that the numerical simulation is usable to examine the validity of reconstructed paleotopography.
Ozaki, Yusuke; Matsushita, Tomoaki*; Masumoto, Kazuhiko*; Imasato, Takehiko*
no journal, ,
In Mizunami Underground Research Laboratory, Groundwater REcovery Experiment in Tunnel (GREET) is performed to capture the post closure behavior of geoenvironment near the test drift. For the evaluation of physical property near the drift wall, repetitive electrical resistivity surveys are performed. The tomography results indicate the resistivity change following to the change in water saturation in the host rock. In this study, we convert the resistivity value to the saturation by using the equation proposed by Kusumi et al., (2006) to clear the degree of change in saturation. Estimated saturation clearly shows the abrupt rise and gentle reduction after drift closure and release of drift, respectively.
Kubota, Kenji*; Oyama, Takahiro*; Suenaga, Hiroshi*; Nohara, Shintaro*; Aoyagi, Kazuhei; Sugita, Yutaka
no journal, ,
no abstracts in English
Iyatomi, Yosuke; Ishibashi, Masayuki; Matsui, Hiroya; Uyama, Masao*; Hitomi, Takashi*; Hayagane, Sayaka*
no journal, ,
no abstracts in English