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Study on swash zone flow field and foreshore deformation characterizing run-up front as a moving boundary

Research Project

Project/Area Number 08650613
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) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1996: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordsswash zone / run-up waves / sediment transport / beach scarp / percolation / moving boundary / beach deformation / 長周期波
Research Abstract

The purpose of this study is to investigate the swash zone dynamics including velocity field, sediment transport and foreshore deformation.
For the hydrodynamics in the swash zone, moving boundary treatment at a run-up front should be required to reproduce the swash zone velocity precisely. The investigator has been studying this subject for almost one decade, and already developed 2-dimensional wave model based on non-linear long-wave equation.But the study was mainly restricted for monochromatic waves. In this project, the analysis was expanded to irregular wave fields. Using a data-base of large-scale wave basin experiments conducted at the Central Electric Power Institute 1996, interaction mechanism between run-up waves and long period waves was examined. It is found that the time series data of run-up waves are not governed by the individual incoming waves but by the long wave component.
For the sedimentation mechanism in the swash zone, quantitative estimations on the sediment transport rate were conducted. Measurements on sand transport rate were done using florescent colored particles. In the foreshore zone, the characteristic topography known as a scarp is often generated. A numerical model to reproduce the swash zone morphology including the scarp was proposed. These analyzes revealed that modeling beach slope failure or avalanching mechanism is essential to reproduce the foreshore beach deformation. Seepage effects into the sand bed are also important to consider the net sediment transport rate in a swash zone. These subjects are remained for the future study.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 浅野 敏之: "浜崖の形成過程に着目した2次元海浜変形に関する研究" 海岸工学論文集. 第43巻. 486-490 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 浅野 敏之: "平面2次元波打ち帯での局所的砂移動に関する実験" 海岸工学論文集. 第43巻. 526-530 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone under obliquely incident waves" Proc.of 25th Intern.Conf.of Coastal Engrg.Vol.3. 3770-3783 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Sediment transport in swash 20ne,-measureweut and calculation" Proc.of 3rd Intern.Conf.on H ydrodynamics. (印刷中). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "A study on beach profile change and resultant scarp formation" Proc.of Coastal Engrg., JSCE. Vol.43. 486-490 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Experiments on local sand transport in a horizontally two-dimensional swash zone" Proc.of Coastal Engrg., JSCE. Vol.43. 526-530 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone under obliquely incident waves" Proc.of 25 th Intern.Conf.of Coastal Engrg.Vol.3. 3770-3783 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone, -measurements and calculation-" Proc.of 3 rd Intern.Conf.on Hydrodynamics. (in printing). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone under obliquely incident waves" Proc.of 25th International Conf.on Coastal Engrg.Vol.3. 3770-3783 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone,-measurements and calculation-" Proc.of 3rd Intern.Conf.on Hydrodyamics. (印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 米永 敏之: "浸透性を考慮した波打ち帯の漂砂の解析" 土木学会西部支部研究発表会概要集. 316-317 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 古賀 尚永: "不規則波浪下での波打ち帯の波高変化と流速特性" 土木学会西部支部研究発表会概要集. 300-301 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 浅野敏之: "浜崖の形成過程に着目した2次元海浜変形に関する研究" 海浜工学論文集. 第43巻. 486-490 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 浅野敏之: "平面2次元波打ち帯での局所的砂移動に関する実験" 海岸工学論文集. 第43巻. 526-530 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Toshiyuki Asano: "Sediment transport in swash zone under obliquely incident waves" Proc.25th Inter.Conf.on Coastal Engrg. (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 久保薫: "破波形態の相違に着目した波打ち帯の沿岸漂砂量の特性" 土木学会西部支部研究発表会概要集. (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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