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1988 Fiscal Year Final Research Report Summary

Study on Deformation Process of Sand Bars at River Mouth

Research Project

Project/Area Number 62460160
Research Category

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

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

Principal Investigator

KITAURA Masaru  Kanazawa University, Faculty of Technology, Professor, 工学部, 教授 (70026269)

Co-Investigator(Kenkyū-buntansha) MIYAJIMA Masakatsu  Kanazawa University, Faculty of Technology, Research Associate, 工学部, 助手 (70143881)
UJIBASHI Yasuyuki  Kanazawa University, Faculty of Technology, Research Associate, 工学部, 助手 (60092764)
TSUJIMOTO Tetsuro  Kanazawa University, Faculty of Technology, Associate Professor, 工学部, 助教授 (20115885)
Project Period (FY) 1987 – 1988
KeywordsSand Bars at River Mouth / Sediment Transport / Sea Wave / Sediment Transport Formula / Relaxation Process / 非平衡流砂 / 緩和過程 / 側岸侵食
Research Abstract

At river mouth, sand bar is often formed due to interaction of sediment transport by river flow and that by waves, and it affects the flow capacity of the river severely. Hence, an appropiate modelling of deformation process of sand bar at river mouth is required from the view point of river engineering.
As for sediment transport in rivers, effect of unsteadiness and non-uniformity of flow on sediment transport is in particular interesting, and thus a non-eguilibrium transport law has been established to describe transient process of sediment transport under such unsteady nonuniform conditions.
Sediment transport by weves is more complicated, but somewhat simplified modelling is required for modelling variation process of river morphology at river mouth. Based on laboratory studies, Ursell number is used to predict the direction of sediment transport, and transport discharge formula using Shields number has been proposed, which is quite similar to that established in river region. In order to evaluate the relation between Shields parameter and the characteristics of waves, applicability of a linear filter method is tested.
A relaxation model is proposed to descride deformation process of sand bars at river mouth totally, in which equilibrium section of river mouth is used as a parameter instead of complicated parameters related to transport capacity of flow and waves. Based on the field data of actual rivers, the applicability of the present analytical model for deformation process of sand hars has been inspected.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 高瀬信忠: 第32回水理講演会論文集. 167-172 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本哲郎: 第32回水理講演会論文集. 395-400 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 広部英一: 福井工業高等専門学校研究紀要. 22. 185-200 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本哲郎: International Symposium on Fluvial Hydraulics,Budapest,Hungary,. I. 70-75 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本哲郎: Proc.IAHR Symposium on Mathematical Modelling of Sediment Transport in the Coastal Zone,Copenhagen,Denmark,. 1-12 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本哲郎: Proc.6th Congress of APD-IAHR,Kyoto,Japan,. II. 15-22 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 高瀬信忠: "第33回水理講演会論文集" 応答関数からみた融雪流出の特性, 1989

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 辻本哲郎: "第33回水理講演会論文集" 流砂の非平衡の論理とその応用, 1989

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takase, Nobutada: "Study on Snow Ablation and Its Runoff" Proc. 32nd Japanese Conference on Hydraulics, Jpn. Soc. of Civil Engineers. 32. 167-172 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsujimoto, Tetsuro: "Effect of Flow Unsteadiness on Bed Load Transport" Proc. 32nd Japanese Conference on Hydraulics, Jpn. Soc. of Civil Engineers. 32. 395-400 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hirobe, Eiichi: "Applicability of Linear Filter Method in the Surf Zone on a Sloping Bottom" Research Reports of Fukui National College of Technology. 22. 185-200 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsujimoto, Tetsuro: "Effect of Flow-Unsteadyness, Non-Uniformity and Relaxation on Bed Load Transport Process" Proc. International Symposium on Fluvial Hydraulics, Budapest, Hungary. I. 70-75 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsujimoto, Tetsuro: "Characteristics of Bedload Transport by Wave Superimposed on Current" Proc. IAHR Symposium on Mathematical Modelling of Sediment Transport in the Coastal Zone, Copenhagen, Denmark. 1-12 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsujimoto, Tetsuro: "Bed-Load Transport in Unsteady Flow" Proc. 6th Congress of APD-IAHR. II-1. 15-22 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Takase, Nobutada: "Characteristics of Snow-Melt Runoff from View Point of Response Function" Proc. 33rd Japanese Conference on Hydraulics, Jpn. Soc. of Civil Engineers. 33. 121-125 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tsujimoto, Tetsuro: "Non-Equilibrium Sediment Transport" Proc. 33rd Japanese Conference on Hydraulics, Jpn. Soc. of Civil Engineers. 33. 445-461 (1989)

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

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Published: 1990-03-20  

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