Sedimentary Structures and Their Formation in an Intertidal Flat with Multi-bar-trough Developed in Both Cross-shore and Along-shore Directions

• WATABE Yoichi

  (独法) 港湾空港技術研究所地盤・構造部土質研究室

• SASSA Shinji

  (独法) 港湾空港技術研究所地盤・構造部

• KAWANO Kenji

  国土交通省九州地方整備局

Bibliographic Information

Other Title

• 岸沖・沿岸両方向に発達した干潟多段バー・トラフの堆積構造とその形成要因

Abstract

In an area of Buzen Sea intertidal flat, multi-bar-trough structure is developed in both cross-shore direction with a long interval and along-shore direction with a short interval. We carried out geophysical investigation and geotechnical soil tests along the multi-bar-trough structure, and clarified that the softness and the density are closely related to the ground surface profile and water/groundwater level during a period of exposure. Relatively denser and stiffer sedimentary structures at bar regions are consistent with our explanation on the formation mechanism; i. e. denser and stiffer structures are explained as a consequence of accumulated contraction caused by effective stress associated with suction corresponding to a low groundwater level at 0.2 to 0.3m deep from the ground surface during the period of exposure.

Journal

• PROCEEDINGS OF COASTAL ENGINEERING, JSCE

  PROCEEDINGS OF COASTAL ENGINEERING, JSCE 54 1166-1170, 2007

  Japan Society of Civil Engineers

Keywords

• General Chemical Engineering

Details

• CRID: 1390001204549441920
• NII Article ID: 130003807958
• DOI: 10.2208/proce1989.54.1166
• ISSN: 18848222
• ISSN: 09167897
• ISSN: http://id.crossref.org/issn/09167897
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed