The Sedimentation on a Wave-dominated Open Coast as Effected by Fluvial Supply and Littoral Drift

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289155
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Geotechnical engineering
• Research Institution: Osaka City University
• Principal Investigator: SEKIGUCHI Hideo 大阪市立大学, 大学院理学研究科, 客員教授 (20027296)
• Co-Investigator(Kenkyū-buntansha): 山崎 秀夫 近畿大学, 理工学部, 教授 (30140312) ; 東 良慶 京都大学, 防災研究所, 助教 (50464201) ; 細山田 得三 長岡技術科学大学, 工学(系)研究科(研究院), 教授 (70262475) ; 原口 強 大阪市立大学, 大学院理学研究科, 准教授 (70372852)
• Research Collaborator: UETA Keiichi ; SHIMOYAMA Shoichi
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 国土保全 / 自然災害 / 海岸侵食 / 漂砂環境 / 洪水堆積物

Outline of Final Research Achievements

This research project explores the way in which extensive beaches of sand have developed on an open-coast rocky shore that faces the Japan Sea. The operation of the Okotsu diversion channel started in 1922 marks the abrupt and thereafter continued supply of fluvial sediment. The discussion centers on assessing the rates and pathways of the sandy and muddy sediments in the sea, including the following themes: storage over a shore platform; beach progradation; seaward limit of cross-shore profile change; muddy flood deposits on a wave-dominated shoreface; wave-formed sedimentary structure; and shelf sedimentation. A closed-form solution based on one-line modelling enabled the authors to reconstruct the stages of development of sandy beaches on a shore platform, and to assess the fluxes of associated longshore drift in the context of the sediment budget analysis.

Free Research Field

工学