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Paper No. 131-8
Presentation Time: 3:00 PM

POTENTIAL RISKS ON MARINE GEOHAZARDS ASSOCIATED WITH OFFSHORE WIND POWERS IN JAPAN


KAWAMURA, Kiichiro1, NAGAKAWA, Katsuhisa2, NOMURA, Hideo2, TAKEMASA, Manabu2, MIURA, Ken-ichiro2, ODAKA, Jun-ichiro2 and TANAKA, Jun2, (1)Graduate School of Sciences and Technology for innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi, 753-8511, Japan, (2)Kisojiban Consultants, 3-22-6, Koto-ku, Tokyo, 135-0016, Japan

This paper deals with various assumed risks on shallow- to deep- marine geohazards associated with offshore wind powers in Japanese Islands.

In general, marine geohazards in Japanese Islands are divided into mainly three categories. One is originated from tectonic activities. Our islands are situated in active margins, so that we have recorded repeated giant earthquakes, tsunamis, volcanic eruptions, and related submarine landslides. The other is originated from sedimentary processes as turbidity currents, dunes, weak/soft foundation, buried valleys, mud volcanoes and so on. The last category is originated from sub-tropical climate as typhoon, storms and tidal waves. We need to reduce the potential risks on these marine geohazards associated with offshore wind powers during construction and/or maintenance. The marine geohazards in each country are characterized by regional differences, so that we must consider the counterplan fitting each region.

In this paper, we demonstrate potential risks on various marine geohazards in Japan. Presumable survey plans and survey manual are discussed in this paper as well.

Session No. 131

D12. Marine/Coastal Science
Wednesday, 28 October 2020: 1:30 PM-5:30 PM
Geological Society of America Abstracts with Programs. Vol 52, No. 6
doi: 10.1130/abs/2020AM-352694
© Copyright 2020 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.
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