Human Geosciences (H)
Session Sub-categoryDisaster geosciences(DS)
Session IDH-DS11
TitleSubaqueous Landslides and Their Anthropogenic Impact for Coastal Regions
Short TitleSubaqueous landslides
Main Convener NameYujin Kitamura
AffiliationDepartment of Earth and Environmental Sciences, Graduate School of Science and Engineering, Kagoshima University
Co-Convener 1NameYasuhiro Yamada
AffiliationJapan Agency for Marine-Earth Science and Technology (JAMSTEC), R&D Center for Ocean Drilling Science (ODS)
Session LanguageE
ScopeA large number of people inhabit coastal areas around the world that are susceptible to natural catastrophes and subaqueous landslides are one of such hazards as demostrated recently. The risk associated with the occurrence of subaqueous landslides is not only constrained to passive margins or subduction zones but any of water areas is also susceptible to their occurrence since subaqueous failures can be triggered at very low slope angles. This realization poses a significant challenge that requires the collection of vast amounts of information and data to unravel the true nature of these events and their potential risk to coastal communities. Despite these challenges, recent technical and engineering advances in the acquisition and processing of sea floor and shallow subsurface data are encouraging. There has also been a concerted effort by scientists from different earth-science disciplines to increase interdisciplinary cooperation at an international level to advance our collective understanding of subaqueous landslides and their consequences.
This session calls for technical contributions covering all aspects of subaqueous landslide research including but not limited to: physical properties of deformed sediments (pre- and post- deformation), role of interstitial fluids in subaqueous landslide development, slope stability and risk assessments, geomorphological and sedimentological/stratigraphic descriptions, tsunamigenic risk and modeling, description of ancient subaqueous landslides, sand-box models and numerical simulations of subaqueous landslides. Case studies from lacustrine landslides and subaerial coastal landslides transitioning into the marine realm are also welcome. Case studies associated with the broader topic of subaqueous gravity-driven flows (e.g.: turbidites and transitional flows) and their relationship with seafloor faulting are also of interest to this session. Participants of IUGS project S4SLIDE IGCP-640 sponsor this session.
Presentation FormatOral and Poster presentation
TimePresentation NoTitlePresenterAbstract
Oral Presentation May 27 PM2
15:30 - 15:45HDS11-01Distribution and sedimentological characteristics of the submarine landslides filling Hidaka Trough, offshore southern Hokkaido, northern Japan with special attention to the uppermost Quaternary submarine landslide bodiesHiroyuki Arato
15:45 - 16:00HDS11-02Origin and distribution of mass-transport deposits in the Pleistocene forearc basin, central Japan, deduced from tephro- and biostratigraphyMasayuki Utsunomiya
16:00 - 16:15HDS11-03Physico-chemical properties of sediment cores from Yatsushiro Sea, western KyushuYujin Kitamura
Presentation NoTitlePresenterAbstract
Poster Presentation May 27 PM1
HDS11-P01Deformed sediment gravity flow deposits associated with bypassing slides:an example from the Miocene Ushikiri Formation, Southwest JapanMiki Kobayashi
HDS11-P02Submarine Landslide and Resulting Tsunami on the Continental Shelf Slope off ShikokuYoudai Gon
HDS11-P03Sedimentary environment estimated from physical properties of sediment core collected during the cruise of Hakuho-maru KH-18-3 in the South Yatsushiro sea, western Kyushu.Koki Hori
HDS11-P04Variation in vane shear strength and magnetic susceptibility in the cores recovered by Hakuho-maru KH-18-3 cruise in Yatsushiro seaYujin Kitamura
HDS11-P05Identification of turbidites in the Yatsushiro Sea surface sediment core samples from non-destructive measurements: Hakuho-maru KH-18-3 Cruise, Yatsushiro Sea, Western Kyushu, JapanRyoya Goto
HDS11-P06Revised columnar section based on grain size distribution analysis of samples from Hakuho-maru KH-18-3 in Yatsushiro seaYuta Ikebata