Geomorphology and distribution of submarine terraces based on high-resolution multibeam bathymetry datasets in Kume Island, Ryukyus.

Hironobu Kan; Yokoyama Yusuke; Masayuki Nagao; Yosuke Nakashima; Nobuyuki Hori; Kensaku Urata; Hiroshi Adachi; Tomoya Ohashi; Kazuhisa Goto; Atsushi Suzuki

doi:10.14866/ajg.2013s.0_97

Annual Meeting of the Association of Japanese Geographers, Spring 2013

Session ID : 528

DOI https://doi.org/10.14866/ajg.2013s.0_97

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Host: The Association of Japanese Geographers

Abstract

Geomorphology and distribution of submarine terraces based on high-resolution multibeam bathymetry datasets in Kume Island, Ryukyus.

*Hironobu Kan, Yokoyama Yusuke, Masayuki Nagao, Yosuke Nakashima, Nobuyuki Hori, Kensaku Urata, Hiroshi Adachi, Tomoya Ohashi, Kazuhisa Goto, Atsushi Suzuki

Author information

Keywords: submarine terrace, submerged coral reef, multibeam echosounder, Kume Island, Ryukyu Islands

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Abstract

The drowned coral reefs and submerged coastal geomorphology are important archive of past climate and sea-level changes. The broadband multibeam survey were conducted in six areas along the northern and southwestern coast of Kume Island, the central Ryukyus, Japan. The high-resolution 3D bathymetry from very shallow reef edges to the deep reef-slopes were observed for these areas. In this study, we present the depth and geomorphology of submarine terraces around Kume Island based on the multibeam bathymetric surveys and SCUBA diving surveys.

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