• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on sediment transport mechanism in swash zone considering in- and ex-filtration effects of a foreshore sandy beach

Research Project

Project/Area Number 11650533
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionKagoshima University

Principal Investigator

ASANO Toshiyuki  Kagoshima Univ., Faculty of Engrg., Associate Professor, 工学部, 助教授 (40111918)

Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywordsswash zone / porous sand layer / sediment transport / run-up waves / percolation / ground water table / beach deformation
Research Abstract

Several workers have pointed out the importance of the groundwater flow in a sandy tidal beach on stability and deformation processes of the foreshore slope. The quantitative descriptions of the effects on sediment transport rates in swash zone, however, have not been sufficiently studied. The present study has evaluated the in- and ex-filtration effects on the sediment transport by analyzing the flow fields both for on a slope and inside the porous medium.
In the first year, a transient infiltration flow into a sand basement, which simulates percolation process of run-up waves, has been analyzed by expanding Dicker's unsteady seepage flow theory. For a description on the run-up wave motion, a numerical model with moving boundary treatment has been used. As a result, the wave velocities on a sandy slope are little affected by the seepage flow, and the infiltration velocities do not show unsteady properties even though the imposed pressure variations are highly unsteady. Next, motions of a sediment particle under both flow motions by run-up waves and by seepage flows are discussed. Analytical expressions on the critical tractive force and sediment transport rate including in- and ex-filtration effects have been derived.
In the second year, an analytical non-linear wave theory has been adopted in order to improve accuracy on the velocity field compared to the first year. Using obtained wave motions, a spherical particle motion placed on a slope is traced based on the equation of motion. The characteristics of the sediment motions and resultant sediment transport rate have been discussed.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 米永敏之: "浸透性斜面上の遡上波の運動と岸沖漂砂の数値解析"平成11年度土木学会西部支部研究発表会講演概要集. 第2巻. 316-317 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 浅野敏之: "前浜砂層内の浸透流を考慮した波打ち帯の漂砂の解析"海岸工学論文集. 第47巻. 511-515 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hoque Azharul: "Calculation on sediment particle trajectory placed in swash zone"平成12年度土木学会西部支部研究発表会講演概要集. 第2巻(印刷中). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 浅野敏之(分担執筆): "1999年度(第35回)氷工学に関する夏期研修会講義集Bロース"土木学会 水理委員会・海岸工学委員会. 173 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Yonenaga: "Numerical Simulations on run-up waves and on-offshore sediment transport on a porous sloping sand bed."Proc.of Western Branch of Civil Engineers. Vol.2. 316-317 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Analyses on sediment transport in a swash zone considering infiltration flows into a sandy foreshore slope."Proc.of Coastal Engrg., JSCE. Vol.47. 511-515 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hoque Azharul: "Calculation on sediment particle trajectory placed in swash zone."Proc.of Western Branch of Civil Engineers. Vol.2 (in printing). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "On wave motion in a swash zone"Lecture notes of the 35th Summer Seminar on Hydraulic Engineering. Series-B. B-6-1-B-6-17 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 浅野敏之: "前浜砂層内の浸透流を考慮した波打ち帯の漂砂の解析"海岸工学論文集. 第47巻. 511-515 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hoque Azharul: "Calculation on sediment particle trajectory placed in swash zone"平成12年度土木学会西部支部研究発表会講演概要集. 第2巻(印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 米永敏之: "浸透性斜面上の遡上波の運動と岸沖漂砂の数値解析"平成11年度土木学会西部支部研究発表会講演概要集. 第2巻. 316-317 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 浅野敏之(分担執筆): "1999年度(第35回)水工学に関する夏期研修会講義集Bコース"土木学会水理委員会・海岸工学委員会. 173p (1999)

    • Related Report
      1999 Annual Research Report

URL: 

Published: 1999-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi