Open symposium of the Science Council of Japan
Submarine geohazards and offshore wind developments

Date and time: 10:00-18:00 on 14 November 2024
Place: Roppongi, Japan and online

Program
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/241028OpenSymposium2024je.pdf

—— Detailed PROGRAM: PPT file and movies are available—–

Open Symposium of the Science Council of Japan
Submarine Geohazards and Offshore Wind Development
1. Organizers:
Subcommittee on Energy and Science and Technology, Committee on Engineering, Science Council of Japan, IUGS Subcommittee, Committee on Earth and Planetary Sciences, Science Council of Japan

2. Co-organizers:
IUGS, Japan Geoscience Union

3. Supporters:
Japanese Geotechnical Society, International Association for Tsunami Disaster Prevention, Japan Society of Exploration Geophysicists, The Society of Study for Submarine Geological Risk, International Consortium on Landslides, National Taiwan University, Japan Society of Civil Engineers, Japan Wind Energy Society, Center for Environmental Information Science, The Engineering Academy of Japan

4. Date and time:
Thursday, November 14, 2024, 10:00-18:00

5. Venue:
Auditorium of the Science Council of Japan and online distribution

6. Purpose of the event:
In Europe, the US and other countries, the development of offshore wind power generation is progressing and it is now playing a major role in renewable energy. Development of offshore wind power generation is also progressing in Japan. However, in active marginal areas such as Taiwan, Japan, Philippines and so on, the seafloor topography is steep and the continental shelf is narrow, limiting the development area. In addition, there are submarine geohazard risks in coastal areas such as submarine liquefaction and mud volcanoes. For the sustainable operation of offshore wind power generation, developers need to recognize the existence of seafloor geohazard risks and carry out development based on appropriate plans. In this symposium, experts and developers will gather to discuss seafloor multi-geohazards and offshore wind power development.
Registration site
https://www.kiso.co.jp/sssgr/topics/events/entry-1155.html

Contact: yasu-okubo@jcom.home.ne.jp

7. Agenda

Chairperson: Chikako Iwaki (Associate Member of the Science Council of Japan)

10:00 Objective of the event: Yasukuni Okubo (Associate Member of the Science Council of Japan)

Session 1: Case Studies of Submarine Geohazard Events (Convener: Shinji Sassa)

10:10 Submarine Geohazards with the Risk to Offshore Wind
Shinji Sassa (Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology)

10:30 Recent Advances in Understanding Turbidity Currents
Hajime Naruse (Kyoto University)

10:50 Recent Advances in Understanding Submarine Landslides and Tsunamis
David Tappin (British Geological Survey)

11:10 Recent Advances in the Mitigation of Scour in Offshore Wind
Andreas Roulund, (Ørsted)

Break (20 min)

Session 2: Submarine Geological and Geophysical Data Archives (Convener: Yukari Kido)

11:50 Necessity of local risk assessment with wide-area geological trends in mind using existing data such as topography, underground cross sections, and grain size distribution
Tomoyuki Sato (Geological Survey of Japan, AIST)

12:10 Use for hazard evaluation and data archive of bathymetric datasets
Hiroki Minami (Japan Coast Guard)

12:30 Submarine Geological and Geophysical Data Archives
Vicki Ferrini (Lamont-Doherty Earth Observatory, Columbia University)
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/Vicki2024SCJ.mp4

12:50 Seabed2030 and Hunga Tonga-Hunga Ha’apai eruption bathymetry expedition
Kevin Mackay （National Institute of Water and Atmospheric Research）

Lunch (60 min)

Session 3: Requirements of offshore geological and geophysical surveys to properly characterize submarine geohazard risks (Convener: Jun Matsushima)

14:10 Risk and Uncertainty: Geophysical exploration for geological assessment
Jun Matsushima (University of Tokyo)

14:30 Required marine geological, geophysical and geotechnical surveys for offshore wind farm development in Taiwan
Char-Shine Liu (National Taiwan University)
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/LiuCS2024SCJOWF.pdf

Session 4: Global review of submarine geohazard risks to offshore renewable energy
(Convener: Kiichiro Kawamura; Yamaguchi University)

14:50 Potential submarine geohazard on the Kumano-nada continental slope, West Japan: Consideration of factors that cause submarine landslides
Toshiya Kanamatsu (Japan Agency for Marine-Earth Science and Technology)

15:10 Geological framework and possible geohazards in central Taiwan Strait
Jih-Hsin Chang (National Taiwan University)

15:30 The experience of the Italian Marine Geology Research community in standardized geohazard feature mapping on the Italian Seas」
Francesco Latino Chiocci (Geologia Marina Dipartimento Scienze della Terra Università La Sapienza)
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/MagicJapan2024.pptx

Break 10 min.

16:00「Opening remarks」 Maria Rose Petrizzo（IUGS vice-President）

Session 5: International Capacity Building (Convener: Ayano Takeuchi; Toho University)
16:10 The Aura Centre for Doctoral Training in Offshore Wind Energy
Robert Dorrell (University of Hull)
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/Dorrell2024SCJ.mp4

16:30 The Geology of Wind Power: from the second largest wind economy in the mid-continent US to the offshore challenge
Nicholas Hayman (University of Oklahoma)
https://ds0n.cc.yamaguchi-u.ac.jp/~kawaken/TGSG/Hayman2024SCJ.mp4

16:50 The Research Institute for Volcanology and Risk Assessment (IVAR) and its potential as a training platform
José Manuel Pacheco (IVAR – Instituto de Investigação em Vulcanologia e Avaliação de Riscos, Universidade dos Açores)

Panel discussion: Towards a guideline
17:10 Panelists: Shinji Sassa, Yukari Kido, Jun Matsushima, Kiichiro Kawamura, Ayano Takeuchi

17:50 Closing remarks
Harue Masuda (Associate Member of the Science Council of Japan)

Field Trip
Date: 15 (Fri) and 16 (Sat) November
Place: Miura Peninsula
Guide: Yujiro Ogawa (Professor Emeritus, University of Tsukuba)
Contact: kiichiro@yamaguchi-u.ac.jp
Deadline for registration: 30 October, 2024

Field observation:
1) Miocene to Pliocene of accretionary prism along the Sagami trough plate subduction boundary. Sedimentary rocks derived mainly from Izu volcanic arc.
2) Uplifted benches and coastal terraces due to subduction earthquake during recent 100 kyears.
3) Evidence of various types of sedimentation and deformation due to accretionary prism formation, particularly by earthquakes, submarine landslides by discussion either liquefaction, fluidization, or diapirism. Many interesting structures are seen.
4) People’s life styles by fisheries and sightseeing, and preparedness.

https://www.jwea.or.jp/news/1899/
https://www.kiso.co.jp/news/entry-1156.html
https://x.com/jimbunshoin/status/1839805090653422012
https://j-desc.org/event/20241114_opensymposium/
https://jsce.jp/pro/taxonomy/term/3488
https://jsce.jp/pro/taxonomy/term/2091
https://segj.or.jp/topics/2024/09/post-234.html