Japan Geoscience Union Meeting 2016

Presentation information


Symbol H (Human Geosciences) » H-CG Complex & General

[H-CG25] Nuclear Energy and Geoscience

Tue. May 24, 2016 9:00 AM - 10:30 AM 304 (3F)

Convener:*Eiji Sasao(Tono Geoscience Center, Japan Atomic Energy Agency), Tsutomu Sato(Faculty of Engineering Hokkaido University), Hidekazu Yoshida(Nagoya University Museum), Chair:Tadafumi Niizato(Japan Atomic Energy Agency)

9:30 AM - 9:45 AM

[HCG25-03] Downward erosion near the recent shoreline since Late Pleistocene

*Ryuta Hataya1, makoto yanagida2, Yuji Torigoe3, Masaru Sato2 (1.Central Research Institute of Electric Power Industry, 2.Hanshin Consultants Co., Ltd., 3.Tohoku Electric Power Co., Inc.)

Keywords:downward erosion, alluvium, risk analysis, geological disposal

We did the risk analysis of the downward erosion of about future 100,000 years for geological disposal. We have investigated the base of the alluvium in Japan. The depth of alluvium is a good indicator of the downward erosion caused by both river process and sea-level change. On the basis of these data, we showed the relationship between the maximum depth of downward erosion near the recent shoreline since Late Pleistocene (y) and the uplift from Late Pleistocene to the recent (x) in the uplift areas are as follows: y>=-x-100. Based on the uniformitarian view, we can estimate the maximum depth of downward erosion of the future in the uplift area using the above relationship. However, evaluation of subsidence areas is a future challenge.
[ Reference ] Hataya R., Yanagida M., Torigoe Y. and Sato M., Journal of the Japan Society of Engineering Geology, Vol.55, No.1, 2016 (in Japanese with English abstoract).