[H-GM04] Geomorphology

[HGM04-10] Coastal Seafloor Geomorphology: launching of a new field and perspectives

*Hironobu Kan¹, Nobuyuki Hori², Tatsuro Nakai³, Yusuke Yokoyama⁴, Kazuhiko Fujita⁵, Hitoshi Hasegawa³, Yosuke Nakashima⁶, Kensaku Urata¹, Atsushi Suzuki⁷, Masayuki Nagao⁷, Kazuhisa Goto⁸ (1.Graduate School of Integrated Sciences for Global Society, Kyushu University, 2.Emeritus Professor, Department of Geography, Tokyo Metropolitan University, 3.Department of Geography and Environmental Studies, Kokushikan University, 4.AORI, University of Tokyo, 5.Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus, 6.National Institute of Technology, Ariake College, 7.Research Institute of Geology and Geoinformation, AIST, 8.IRIDeS, Tohoku University)

Keywords:multibeam bathymetry, echo sounder, sea level change, shelf

The coastal seafloor at depths shallower than ~130 m was subjected to alternating subaerial erosion and sedimentation during Quaternary sea-level change. However, the coastal seafloor is rarely discussed in conventional geomorphology. Recently, the development of exploration technology such as multibeam echo sounder survey enables us to observe the accurate and detailed coastal seafloor geomorphology. In this presentation, we discuss the novelty and possibilities of coastal seafloor geomorphology based on case studies from around the world and research materials of our group.