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Mechanics of Sediment Transport of Graded Materials and Fluvial Sorting

Research Project

Project/Area Number 01550401
Research Category

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

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

Principal Investigator

TSUJIMOTO Tetsuro  Kanazawa Univ., Dept. of Civil Enging., Assoc. Prof, 工学部, 助教授 (20115885)

Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsSediment Transport / Bed-Load Transport / Graded Materials / Fluvial Sorting / Armoring / Pavement (Paved Bed) / Fluvial Hydraulics / Hydraulic Engineering
Research Abstract

Sediment transport of graded materials often shows non-equilibrium behavior and subsequently it accompanies fluvial sorting process. In order to describe the phenomena it brings about, non-equilibrium transport model characterized by pick-up rate and step length for each grain size.
When the sediment transport supplied from the upstream region is suppressed, the bed-surface adjusts its composition (size distribution) by selective movement of sediment according to the size. Particularly, the supplied sediment is zero, the bed is coarsened and the transport rate over it becomes zero increasingly from the upstream end (armor coat formation and propagation). While, the suppressed sediment is not zero, all size-fraction of sediment are still transported (the transport rate becomes equal to the supplied one finally) but the bed surface is obviously coarsened (pavement). These two different types of bed coarsening process could be described by the non-equilibrium transport model proposed in th … More is study.
Besides monotonous sorting, alternate sortings are often observed : longitudinally alternate sorting and laterally alternate sorting (longitudinal stripes of sorting). These sortings do not require the forced change of supplied sediment. Non-equilibrium transport for each grain size and the change of bed-surface composition brings about an instability of the bed-surface composition. The formation processes could be described by the non-equilibrium transport model proposed in this study.
In a stream with longitudinally alternate sorting, the longitudinal change of bed roughness severely changes the turbulent structure and subsequently the characteristics of suspended sediment transport over it. Based on the turbulence measurements, a model to describe the relaxation process of Reynolds-stress distribution due to the change of the bed shear stress was derived, which was a convolution-integral type with an impulse response. The similarity between the turbulent momentum exchange and the turbulent transport of suspended sediment suggested a description of non-equilibrium concentration distribution of suspended sediment with the relaxation model prepared for the Reynolds-stress distribution. Less

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] 辻本 哲郎: "Instability of bedーsarface composition due to sorting process in a stream composed of sand and gravel" Proc.4th International Symposium on Sediment Transport Modeling,New Orleans,USA. S-12 19-24 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Longitudinal Stripes of alterrate lateral sorting due to cellular seconday currents" Proc.23rd IAHR Congress,Ottawa,Canada. 2. 17-24 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "河床表層粒度構成の不安定現象としての縦断交互分級の形成機構" 土木学会論文集. 411. 143-150 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Longitudinal stripes of sorting due to cellular secondary currents" Journal of Hydroscience and Hydraulic Engineening. 7ー1. 23-34 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Instability of longitudinal distribution of fluvial bedーsurface composition" Journal of Hydroscience & Hydraulic Engineering. 7ー2. 69-80 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "混合砂礫床の粗粒化について" 土木学会論文集. 417. 91-98 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "非平衡状態で浮遊砂濃度分布" 土木学会論文集. 423. 63-71 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Open channel flow with spatially varied bed shear stress" Journal of Hydroscience and Hydraulic Engineering. 8ー2. 1-20 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "水工学論文集" 底面せん断応力が変化する開水路流れの特性, 433-438 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Journal of Hydroscience and Hydraulic Engineering" Static armoring and dynamic pavement, 55-67 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T.: "Instability of bed surface composition due to sorting process in a stream composed of sand and gravel" Proc. of International Symposium on Sediment Transport Modeling, New Orleans, USA. S-12. 19-24 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T.: "Longitudinal stripes of alternate lateral sorting due to cellular secondary currents" Proc. 23rd(IAHR) Congress, Ottawa, Canada. Vol. 2. 17-24 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T.: "Formation of alternate longitudinal sorting as an instability of fluvial bed-surface composition" Proc. of(JSCE). No. 411/II-12. 143-150 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T.: "Longitudinal stripes of sorting due to cellular secondary currents" Journal of Hydroscience and Hydraulic Engineering. Vol. 7, No. 1. 23-34 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T., A. H. Cardoso and A. Saito: "Open channel flow with variable bed shear stress" Proc. of Hydraulic Engineering, (JSCE). Vol. 34. 433-438 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T.: "Instability of longitudinal distribution of fluvial bed-surface composition" Journal of Hydroscience and Hydraulic Engineering. Vol. 7, No. 2. 69-80 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T. and K. Motohashi: "Armoring and pavement formation" Proc. of JSCE. No. 417/II-13. 91-98 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsumimoto, T. and K. Motohashi: "Static armoring and dynamic pavement" Journal of Hydroscience and Hydraulic Engineering. Vol. 8, No. 1. 55-67 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T. and A. Saito: "Concentration distribution of suspended sediment under non-equilibrium conditions" Proc. of JSCE. No. 423/II-14. 63-71 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tsujimoto, T., A. H. Cardoso and A. Saito: "Open channel flow with spatially varied bed shear stress" Journal of Hydroscience and Hydraulic Engineering. Vol. 8, No. 2. 1-20 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 辻本 哲郎: "Instability of longitudinal distribution of fluvial bedーsurface composition" Journal of Hydroscience & Hydranlic Engineering. 7ー2. 69-80 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本 哲郎: "混合砂礫床の粗粒化について" 土木学会論文集. 417. 91-98 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本 哲郎: "底面せん断応力が変化する開水路流れの特性" 水工学論文集. 34. 433-438 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本 哲郎: "Static armoring and dynamic pavement" Journal of Hydroscience and Hydranlic Engineering. 8ー1. 55-67 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本 哲郎: "非平衡状態での浮遊砂濃度分布" 土木学会論文集. 423. 63-71 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本 哲郎: "Open channel flow with spatially varied bed shear stress" Journal of Hydroscience and Hydranlic Engineering. 8ー2. 1-20 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 辻本哲郎: "Instability of bed-surface composition due to sorting process in a stream composed of sand and gravel" Proc.International Symposium on Sediment Transport Modeling,New Orleans,USA. 19-24 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 辻本哲郎: "Longitudinal stripes of alternate lateral sorting due to cellular Secondary Currents" Proc.23rd IAHR Congress,Ottawa,Canada. 2. 17-24 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 辻本哲郎: "Transient process of Reynolds-stress distribution due to abrupt change of bed roughness in open channels" 金沢大学工学部紀要. 22-2. 93-102 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 辻本哲郎: "Longitudinal stripes of sorting due to cellular secondary currents" Journal of Hydroscience and Hydraulic Engineering. 7-1. 23-34 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 辻本哲郎: "河床表層粒度構成の不安定現象としての縦断交互分級の形成機構" 土木学会論文集. 411. 143-150 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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