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Study on Effect of Characteristics of River Boundaries on Sediment Transport Process

Research Project

Project/Area Number 61302062
Research Category

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

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

Principal Investigator

HIROJI Nakagawa  Kyoto University, School of Civil Engineering, Professor, 工学部, 教授 (60027216)

Co-Investigator(Kenkyū-buntansha) TSUJIMOTO Tetsuro  Kanazawa University, Department of Civil Engineering, Associate Professor, 工学部, 助教授 (20115885)
SHIMIZU Yoshihiko  Kyoto University, School of Civil Engineering, Research Associate, 工学部, 助手 (70178995)
MURAKAMI Shogo  Kyoto University, School of Civil Engineering, Research Associate, 工学部, 助手 (70166247)
KNISELY C.W.  Kyoto University, School of Civil Engineering, Lecturer, 工学部, 講師 (40197629)
NEZU Iehisa  Kyoto University, School of Civil Engineering, Associate Professor, 工学部, 助教授 (30109029)
冨永 晃宏  群馬大学, 工学部, 助手 (60135530)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1987: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1986: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsFluvial process / Non-equilibrium sediment transport process / turbulent flow over rough bed / 流路形状 / 非線型Darcy則 / pick-up rate / 流出入流速 / 流砂の非平衡性
Research Abstract

The key to the study of an alluvial process is to elucidate interactions between flow properties, sediment movements and bed or channel configurations. For this reason, any physical model of sediment transport is required to describe reasonably the non-equilibrium state of an alluvial process. From this point of view, the sediment model has been recently reinvestigated on the basis of knowledge accumulated on the mechanism of sediment motion. In this research, firstly, effect of the characteristics of the boundaries on the flow structure is investigated. Particularly, the special attention is paid to the velocity profile and turbulent structure over a rough permeable bed. A gravel bed is characterized by small relative submergence and steep slope, the flow resistance and the sediment transport behaviours on which are somehow different from those on a sand bed.Many informations collected for alluvial channels are on longer valid for gravel-bed rivers. The flow resistance and the sediment-transport mechanics are closely related to the velocity profile which represents the turbulent structure. Thus in this paper, the flow structure is discussed with particular reference to the effects of large roughness and high permeability of a bed, using carefully measured velocity-profile date. Secondary, Particularly, importance is attached to unified treatment of bed material load, taking into account the transition from bed load motion to suspension both through incipient motion and transport process, and a physical model for description of non-equilibrium situation is proposed by applying a stochastic approach. Further in order to predict the scouring process of river banks, formation of armor coat, incipience of debris flow, etc., the effects of channel boundaries such as side slope, sand mixtures and permeable bed on sediment transport process are discussed.

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 中川 博次: 混相流. 1. 18-31 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 辻本 哲郎: 第31回水理講演会論文集. 713-718 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 中川 博次: 第32回水理講演会論文集. 529-534 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 辻本哲郎: 第32回溝理講演会論文集. 395-400 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 冨永 晃宏: 第32回水理講演会論文集. 455-460 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tetsuro Tsujimoto: Proc. 22nd Congress of IAHR. 1777-182 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hiroji Nakagawa: "Recent trend of research of sediment transport" Japanese J. Multiphase Flow.1. 18-31 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tetsuro Tsujimoto: "Bed load transport and bed deformation in alluvial channel with continuous expansion and contraction" Proc. 31st Japanese Conference on Hydraulics, JSCE (in Japanese).713-718 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hiroji Nakagawa: "Transition mechanism of saltation bed particles into suspension" Proc. 32nd Japanese Conference on Hydraulics, JSCE (in Japanese).529-534 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Tetsuro Tsujimoto: "Effect of flow unsteadiness on bed load transport" Proc. 32nd Japanese Conference on Hydraulics, JSCE (in Japanese).395-400 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Akihiro Tominaga: "The effects of secondary currents on sediment transport" Proc. 32nd Japanese Conference on Hydraulics, JSCE (in Japanese).455-460 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 辻本哲郎: 第31回水理講演会論文集. 713-718 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 清水義彦: 土木学会第41回年次学術講演会講演概要集. 333-334 (1986)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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