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1991 Fiscal Year Final Research Report Summary

各種水域の乱流構造特性とその移動床問題への水工学的応用に関する研究

Research Project

Project/Area Number 01302046
Research Category

Grant-in-Aid for Co-operative Research (A)

Allocation TypeSingle-year Grants
Research Field Hydraulic engineering
Research InstitutionKyoto University

Principal Investigator

NAKAGAWA Hiroji  Kyoto Univ., Faculty of Engineering, Professor, 工学部, 教授 (60027216)

Co-Investigator(Kenkyū-buntansha) NAKANO Susumu  Tokushima Univ., Faculty of Eng., Assistant Prof., 工学部, 講師 (50198157)
SHIMIZU Yoshihiko  Gunma Univ., Faculty of Eng., Research Associate, 工学部, 助手 (70178995)
MURAKAMI Shogo  Kyoto Univ., Faculty of Eng., Research Associate, 工学部, 助手 (70166247)
TSUJIMOTO Tetsuro  Kanazawa Univ., Faculty of Eng., Associate Prof, 工学部, 助教授 (20115885)
NEZU Iehisa  Kyoto Univ., Faculty of Eng., Associate Prof., 工学部, 助教授 (30109029)
Project Period (FY) 1989 – 1991
Keywordsnon-equilibrium / alluvial process / sediment transport / pick-up rate / step length / moving period / unsteady flow / non-uniform flow
Research Abstract

In this study we clarify the fundamental characteristics of the non-equilibrium sediment transport, paying attention to the interaction between the motion of sand particles and turbulent structures under the various kinds of flow fields. One of the typical phenomena of the sediment transport is transient process, which can be described by the stochastic model. We proposed the widely applicable stochastic model to the non-equilibrium fluvial process under the unsteady and non-uniform flow fields. That model consists of the pick-up rate, step length and moving period. Next, the flow structures are experimentally and theoretically investigated under the various kind boundary conditions, i. e. unsteady open channel flow, oscillation-current coexisting flow, flow with vegetated area, flow over the gravel bed and so on. The characteristics of the sediment transport mechanism are, examined@ by associating the deterministic solution of sand particle to the irregularities of the flow and boundary conditions. The key point is the harmony between the deterministic approach and the stodhastic approach.
The proposed model shows the good agreement with the various kinds of the experimental data, and its appicability is recognized.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 中川 博次: "掃流から浮遊への遷移の出現機構とその流砂過程における役割" 土木学会論文集. 417号. 141-156 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本 哲郎: "礫床流路における非定常掃流砂量" 土木学会論文集. 417号. 139-147 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村上 正吾: "掃流過程に及ぼす河床面を通しての流出入流速の影響" 土木学会論文集. 423. 53-62 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中川 博次: "相対水深の小さな流れの構造に関する実験的研究" 土木学会論文集. 423. 81 (1990)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 村上 正吾: "河床砂礫のpickーup rate推定式について" 土木学会論文集. 443. 9-16 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本 哲郎: "時間軸上に展開された非平衡流砂過程のモデル化" 土木学会論文集. 443. 37-46 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hiroji Nakagawa: "Transition from Bed-Load Motion to Suspension and its Role on Bed Material Load Transport" Proc. JSCE. No. 417, II-13. 141-156 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tetsuro Tsujimoto: "Unsteady Bed-Load Transport in Gravel-Bed Open Channel" Proc. JSCE. No. 417, II-13. 139-147 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shogo Murakami: "Bed-Load Transport Influenced by Transpiration through a Bottom of Fluvial Open-Channel" Proc. JSCE. No. 423, II-14. 53-62 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hiroji Nakagawa: "Experimental Study on Turbulent Flow with Small Relative Submergence" Proc. JSCE. No. 423, II-14. 73-81 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shogo Murakami: "Pick-up rate of Sand and Gravels" Proc. JSCE. No. 443, II-18. 9-16 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tetsuro Tsujimoto: "Non-Equilibrium Sediment Transport along a Temporal Axis" Proc. JSCE. No. 443, II-18. 37-46 (1992)

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

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Published: 1993-03-16  

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