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2003 Fiscal Year Final Research Report Summary

Hydraulic characteristic on flow field and sediment movement inside and outside seagrass fields

Research Project

Project/Area Number 14550520
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionKobe City College of Technology

Principal Investigator

TSUJIMOTO Gozo  Kobe Ctiy College of Technology, Prof., 教授 (10155377)

Co-Investigator(Kenkyū-buntansha) NAKAO Kohichi  Kobe Ctiy College of Technology, Prof., 教授 (80124064)
KAKINOKI Tetsuya  Kobe Ctiy College of Technology, Lecture, 講師 (50353298)
SHIGEMATSU Takaaki  Osaka City Univeristy, Associate Prof., 助教授 (80206086)
TAKEHARA Kohsei  Kikin University, Associate Prof., 助教授 (50216933)
HOSOYAMADA Tokuzo  Nagaoka University of Tech., Associate Prof., 助教授 (70262475)
Project Period (FY) 2002 – 2003
KeywordsSeaweed / imaging technique / porsou model / moving boundary / field observation
Research Abstract

To obtain some information to reproduce the disappearing seagrass field in the sea area, the laboratory experiment and the field observation have been conducted. The suspended sediment concentration among model seagrasses has been measured by using image technique. The distribution of suspended sediment and the grain size could be measured simultaneously. It turned out that the particle size was bigger than medium grain size at the beginning of its movement, the particle of a central particle size moved with the increasing of time. To consider the effect of the movement object into the numerical simulation, the wrapping judgment method was used. A measuring method of fluid motion inside and in the vicinity of porous media of silicon spheres is presented. Sodium iodide solution is used as the refraction index matching fluid. In order to capture pictures, a resolution PIV method Some experimental results on the velocity field and turbulence kinemaatic energy are presented. Structure of the flow field inside and in the vicinity of the porous media is discussed. Moreover generation and dissipation mechanism of the turbulence was discussed.
A field observation has been executed over the seagrass field formed at Eigashima beach in Akeshi City. There were a lot of died seagrass because the growing thickly period had been passed at time. There are clear correlations in PH and DO, and it is thought the influence of the photosynthesis in daytime. Moreover, the decrease at flow velocity was observed by the influence of the marine forest in the bottom of the sea neighborhood

  • Research Products

    (11 results)

All 2005 2004 2003

All Journal Article (11 results)

  • [Journal Article] Hydraulic characteristic under model seagrass by flow visulaization using the PTV technique2005

    • Author(s)
      Tsujimoto ら
    • Journal Title

      Journal of Coastal Research, Special Issue (in printed)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Seasonal changes of the profile of internal flats2005

    • Author(s)
      Kakinoki ら
    • Journal Title

      Journal of Coastal Research, Special Issue (in printed)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Hydraulic characteristic under model seagrass by flow visualization using the PTV technique2005

    • Author(s)
      Gozo Tsujimoto et al.
    • Journal Title

      Journal of Coastal Research Special Issue(in printed)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Seasonal changes of the profile of internal flats2005

    • Author(s)
      Tetsuya Kakinoki et al.
    • Journal Title

      Journal of Coastal Research Special Issue(in printed)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] ビデオ画像による水中の砂粒子濃度の測定2004

    • Author(s)
      中尾幸一
    • Journal Title

      神戸高専研究紀要 42

      Pages: 103-106

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 浮遊砂濃度の粒度及び濃度分布の同時計測に関する基礎的研究2004

    • Author(s)
      柿木哲哉, 辻本剛三
    • Journal Title

      海岸工学論文集 51

      Pages: 1446-1450

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 江井ヶ島海岸の藻場における水質に関する現地調査2004

    • Author(s)
      山田浩之, 辻本剛三
    • Journal Title

      土木学会関西支部年次学術講演会 平成16年度

      Pages: 91-93

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Measurement of concentration of suspended sediment in the water body With video images2004

    • Author(s)
      Kohichi Nakao
    • Journal Title

      Research Report of Kobe City College of Technology No.42

      Pages: 103-106

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Simultaneous measurement of grain size and concentration for suspended Sediment (in Japanese)2004

    • Author(s)
      Tetsuya Kakinoki, Gozo Tujimoto
    • Journal Title

      Journal of Coastal Engineering Vol.51

      Pages: 1446-1450

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 多孔質体による乱れの生成・減衰機構の解明に関する実験的研究2003

    • Author(s)
      重松孝昌ら
    • Journal Title

      水工学論文集 47

      Pages: 465-469

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Experimental study on generation and dissipation mechanisms of Turbulence inside and in the vicinity of porous media (in Japanese)2003

    • Author(s)
      Takaaki Shigematsu et al.
    • Journal Title

      Journal of Hydraulics Vol.46

      Pages: 465-469

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2006-07-11  

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