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Study on behavior wind-induced flow and water quality in a density stratified closed water area with aquatic plants

Research Project

Project/Area Number 14360145
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Irrigation, drainage and rural engineering/Rural planning
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

MORI Ken  KYUSHU UNIVERSITY, Faculty of Agriculture, Professor, 大学院・農学研究院, 教授 (50117272)

Co-Investigator(Kenkyū-buntansha) SHIKASHO Shiomi  KYUSHU UNIVERSITY, Faculty of Agriculture, Professor, 大学院・農学研究院, 教授 (80038265)
NAKANO Yosisuke  KYUSHU UNIVERSITY, Faculty of Agriculture, Professor, 大学院・農学研究院, 教授 (60038320)
INOUE Eiji  KYUSHU UNIVERSITY, Faculty of Agriculture, Associate Professor, 大学院・農学研究院, 助教授 (00184739)
HIRAMATSU Kazuaki  KYUSHU UNIVERSITY, Faculty of Agriculture, Associate Professor, 大学院・農学研究院, 助教授 (10199094)
HARAGUCHI Tomokazu  KYUSHU UNIVERSITY, Faculty of Agriculture, Research Associate, 大学院・農学研究院, 助手 (90346833)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥11,400,000 (Direct Cost: ¥11,400,000)
Fiscal Year 2004: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2003: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2002: ¥6,200,000 (Direct Cost: ¥6,200,000)
Keywordsclosed water area / aquatic plant / density stratified flow / wind induced flow / entrainment phenomenon / turbulent structure / water quality / dissolved oxygen / 浮葉性植物 / 密度2成層 / 溶存酸素 / 日サイクル変動
Research Abstract

Water environmental dynamics in closed water areas with density stratify such as ponds, reservoirs, lakes and estuaries are effected by turbulent flows based on mechanical and thermal disturbances. The thermal disturbance consists of lighting and heating based on solar radiation in the daytime and cooling based on emission at the night. The mechanical disturbance of wind induced flow and wind wave generated by wind action on the surface. We considered the mechanical disturbance of wind induced flow was generated by wind action on the surface in the closed water areas. An experimental investigation of turbulent entrainment induced by the mechanical disturbance was carried out in a laboratory wind -wave tank. We considered that the occupying rate of the floating water plants to the water surface affected on the turbulent entrainment in the closed water area. The results indicated that the existence the floating water plants contributed to make a significant effect on the scale of the turbulent entrainment. It was also found that the entrainment velocity depended on the Richardson number to the power of-3/2, the stability parameter of density stratified fluid flow. The following conclusions can be drawn : (1).From the experiment of entrainment velocity, the increase of the covered rate β of floating water plants decreases the entrainment velocity of the upper layer. (2).From the experiment of turbulent structure, the increase of the covered rate of floating water plants decreases the amount of turbulent energy. (3).The increase of the covered rate β of floating water plants decreases the turbulent energy of the upper layer that is produced at the surface. As the turbulent energy is transformed into potential energy, a close relationship between the decrease of entrainment velocity and the turbulent structure is clearly established.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (22 results)

All 2004 Other

All Journal Article (13 results) Publications (9 results)

  • [Journal Article] The Impact of Floating Plants on wind-Induced Flow and Wind Wave In a Closed Ware Area2004

    • Author(s)
      A.Ozaki et al.
    • Journal Title

      Proceeding of ASCE International Annual Meeting Paper No.042154

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Impact of Aquatic Plants on Entrainment Phenomena Based on Wind-Induced Flow in a Closed Density Stratified Water Area2004

    • Author(s)
      A.Ozaki et al.
    • Journal Title

      Paddy and Water Environment 2

      Pages: 125-134

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Identification of Parameter of the Agricultural Rubber Crawler Vehicle by Using the Measured Dynamic Loading Force Acting on the Track Rollers2004

    • Author(s)
      E.Inoue et al.
    • Journal Title

      農業機械学会誌 66

      Pages: 75-85

    • NAID

      10013776318

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Plastic-film Mulching on Leaching of Nitrate Nitrogen in Upland Field Converted from Paddy2004

    • Author(s)
      T.Haraguchi et al.
    • Journal Title

      Paddy and Water Environment 2

      Pages: 67-72

    • NAID

      10029231876

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Numerical prediction of suspended sediment concentration in the Ariake Sea, Japan, using time-dependent sediment resuspension and deposition model2004

    • Author(s)
      K.Hiramatsu et al.
    • Journal Title

      Paddy and Water Environment 2

      Pages: 135-143

    • NAID

      10029232317

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] The Impact of Floating Plants on Wind-Induced Flow and Wind Wave In a Closed Ware Area2004

    • Author(s)
      A.Ozaki et al.
    • Journal Title

      Proceeding of ASCE International Annual Meeting Paper No.042154

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Identification of Parameter of the Agricultural Rubber Crawler Vehicle by Using the Measured Dynamic Loading Force Acting on the Track Rollers2004

    • Author(s)
      E.Inoue et al.
    • Journal Title

      Journal of J.S.A.M 66

      Pages: 75-84

    • NAID

      10013776318

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Plastic-film Mulching on on Leaching of Nitrate Nitrogen in Upland Field Converted from Paddy2004

    • Author(s)
      T.Haraguchi et al.
    • Journal Title

      Paddy and Water Environment 2

      Pages: 67-72

    • NAID

      10029231876

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Numerical prediction of suspended sedimentconcentration in the Ariake Sea, Japan, using time-dependent sediment resuspension and deposition model2004

    • Author(s)
      K.Hiramatsu et al.
    • Journal Title

      Paddy and Water Environment 2

      Pages: 135-143

    • NAID

      10029232317

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Impact of Aquatic Plants on entrainment Phenomena Based on Wind-Induced Flow in a Closed Density Stratified Water Area2004

    • Author(s)
      A.Ozaki et al.
    • Journal Title

      Paddy and Water Environment 2・(3)

      Pages: 125-134

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Identification of Parameter of the Agricultural Rudder Crawler Vehicle by Using the Measured Dynamic Loading Force Acting on the Track Rollers2004

    • Author(s)
      E.Inoue et al.
    • Journal Title

      農業機械学会誌 66・6

      Pages: 75-85

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of Plastic-film Mulching on Leaching of Nitrate Nitrogen in Upland Field Converted from Paddy2004

    • Author(s)
      T.Haraguchi et al.
    • Journal Title

      Paddy and Water Environment 2・(2)

      Pages: 67-72

    • NAID

      10029231876

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Numerical prediction of suspended sediment concentration in the Ariake Sea, Japan, using time-dependent sediment resuspension and deposition model

    • Author(s)
      K.Hiramatsu et al.
    • Journal Title

      Paddy and Water Environment (accepted)

    • NAID

      10029232317

    • Related Report
      2004 Annual Research Report
  • [Publications] A.Ozaki et al.: "Wind Induced Flow Some Aquatic Plants In A Closed Density Stratified Water Area"Proceeding of ASAE Annual Meeting. paper No.03 2159. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Sumimoto et al.: "Daily Cyclic Variations of Dissolved Oxygen in a Closed Water Area with Floating Aquatic Plants"Proceeding of ASAE Annual Meeting. paper No.03 2193. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Haraguchi et al.: "Movement of Water Collected by Vegetables in Plastic-mulching Field"J.Fac.Agr., Kyushu Univ.. 48. 237-245 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Ozaki et al.: "Effect of Wind Induced Flow in a Closed Density Stratified Water Area Partially Covered with Floating Water Plants"J. Fac. Agr.,Kyushu Univ.. 47・1. 139-147 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 村松亮介: "浮葉性水草のある閉鎖性2成層水域における吹送流の乱流構造"九大農学芸誌. 57・1. 45-52 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 中島央晶: "人工魚巣開口部における乱流剪断層の水理特性"九大農学芸誌. 57・1. 53-58 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 炭本祥生: "堰を越える落下水による酸素再曝気モデル"九大農学芸誌. 57・1. 59-65 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Ozaki et al.: "Wind Induced Turbulent Entrainment in a Closed Density Stratified Water Area Partially Covered with the Floating Water Plant"Proceeding of ASAE Annual Meeting. 022154(印刷中). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 炭本祥生: "浮葉性植物のある閉鎖性水域における溶存酸素の日サイクル変動"平成14年度応用水理研究部会講演集. 37-42 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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