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Study on Mass Transfer between Surface Water and Sub-Surface Water

Research Project

Project/Area Number 06650576
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 水工水理学
Research InstitutionOsaka Institute of Technology

Principal Investigator

AYA Shirou  Osaka Institute of Technology, Faculty of Eng., Associate Professor, 工学部, 助教授 (00026361)

Co-Investigator(Kenkyū-buntansha) AOKI Kazuo  Osaka Institute of Technology, Faculty of Eng., Associate Professor, 工学部, 助教授 (20111916)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSeepage folw, / Thin layr flows, / Folws on permeable boundary / Diffusion, / Dispersion, / Self-Purification / Mixing, / Mass exchange / 薄層流
Research Abstract

Flows on the permeable boundary was experimentally investigated, and the flow visualization technique revealed ; (1)permeable boundary is schematically classified into three layrs, and the layr A located on the top of boundary is the most active for vertical mass transport ; (2)its geometrical features, i.e., the length to depth ratio is about 0.25 and the depth is dependent on the grain size of boundary ; and (3)the three characteristic parameters of the mass transport between surface and sub-surface waters, i.e., the characteristic time, the mass exchange velocity, the diffusion coefficient were also investigated, and dimensional analysis disclosed the functional relationships between these three parameters, and hydraulic parameters and characteristic parameters of the boundary.
Flows from the underground water and the river waters and associated mass transport was investigated. (1)The absorption curves of salt was experimentally investigated and the hysteresis curves between absorption and desorption processes were clarified. (2)The flows between the underwater and the river was numerically investigated by means of saturated and un-saturated seepage theory and it is disclosed that the flow rate depend on the water surface elevation of he river water.
The concentration decay of the turbidity was also investigated by the field measurements and the laboratory study in the flumes with permeable boundaries. (1)Its characteristic velocity was studied by dimensional analysis.(2)The numerical experiment of the concentration decay in the river disclosed that it was caused by the dilution by the inflow from tributaries, and/or the mass transport and exchange between the river water and the sub-surface flows.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] H.Imanishi et al: "The Analysis of salt water intrusion by field weasurement" Environ mental Geotechnics. 73-78 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 青木 一男: "地下水と河川水間の相互流動" 地下水環境地盤に関するシンポジウム96. 95-102 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 綾 史郎: "河川流における混合現象" ながれ. 16. 22-27 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] IMANISHI,H.: "The Analysis of Salt Water Intrusion by Field Measurement, Environmental Geomechanics" 73-78 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] AOKI,K.: "Cross Flows between River Water and Underground Water, Proc.of Symposium on Environmental Geotechnics and Underground Water" 95-102 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] AYA,Shirou: "Mixing in River" NAGARE. 22-27 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 青木 一男他: "地下水と河川水の相互作用に関する研究" 第30回土質工学研究発表会概要集. (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 青木 一男他: "地下水塩水化現象の移流・分散・吸着特性について" 地下水地盤環境に関するシンポジウム94論文集. 119-130 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] 綾 史郎: "礫性路床流れにおける水理特性" 土木学会第51回年次学術講演会概要. (予定). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 青木一男,他: "地下水と河川水の相互作用に関する研究" 第30回土質工学研究発表会概要集. (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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