[H-CG28] Nuclear Energy and Geoscience

[HCG28-P04] Distribution map of erosion rates on timescales of 10²–10⁴ years in the Japanese Islands

*Yuki Hiura¹, Tetsuya Komatsu¹, Shigeru Sueoka¹, You Kitamura², Tomoji Sanga² (1.Japan Atomic Energy Agency, 2.JX Nippon Exploration and Development co. Ltd.)

Keywords:erosion rate, reservoir sedimentation, terrestrial cosmogenic nuclides, Japanese Islands, GIS

Distribution map of erosion rates on geological timescales should be prepared to evaluate the long-term stability of geological environments. Previous distribution maps of erosion rates were constructed based on deposition rates in artificial dams on multi-decadal timescales. This study aims to construct a new distribution map of erosion rates on timescales of 10²–10⁴ years by using reported data derived from terrestrial cosmogenic nuclide (TCN) methods. This study presents the method for constructing the new distribution map of erosion rate and the results of comparing it with the previous one.

Acknowledgments: This study was carried out under a contract with METI (Ministry of Economy, Trade and Industry) as part of its R&D supporting program for developing geological disposal technology.