Experiments on the gully development due to seepage erosion

DOI
  • Takei Yoshihiro
    Laboratery of River and Watershed Engineering,Group of Hydraulic and Aquatic Engineering,Division of Field Engineering for Environment,Graduate School of Engineering,Hokkaido University
  • Izumi Norihiro
    Laboratery of River and Watershed Engineering,Group of Hydraulic and Aquatic Engineering,Division of Field Engineering for Environment,Graduate School of Engineering,Hokkaido University
  • Pornprommin Adichai
    Laboratery of River and Watershed Engineering,Group of Hydraulic and Aquatic Engineering,Division of Field Engineering for Environment,Graduate School of Engineering,Hokkaido University

Bibliographic Information

Other Title
  • 湧水侵食によるガリの発達プロセスに関する実験的研究

Abstract

This study aims to fulfill a lack of the fundamental knowledge in the seepage erosion mechanism. <BR> I carried out experiments using a apparatus with wide chamber that can vary the bed gradient.I ingenerate a seepage flow and observe the appearance of seepage erosion.A series of experiments is conducted with varying sediment layer thickness,bed gradient and discharge.I analyzed how the seepage erosion affects the formation of gullies,comparing the values of gully width,shape,intervals of formation and verocity.<BR> From experiments, as the bed gradient increase,gully width increase,channel bifurcations are more difficult to appear and velocity of gully formation decrease.I could see 2 patterns of interval of formation from differences of layer thickness:as the bed gradient increase,interval increase and as the bed gradient decrease, interval decrease.<BR>

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Details 詳細情報について

  • CRID
    1390001205593059584
  • NII Article ID
    130004604426
  • DOI
    10.11345/japannctam.58.0.83.0
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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