圧力勾配を考慮した流砂量式によるデューンの弱非線型安定解析 NONLINEAR STABILITY ANALYSIS OF DUNES BY THE USE OF A SEDIMENT TRANSPORT FORMULA INCLUDING THE EFFECT OF THE PRESSURE GRADIENT

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Author(s)

Abstract

In order to enable accurate predictions of the bedform change in rivers, the accurate estimation of the sediment transport rate is important. In this study, we propose a bedload formula taking into account the effect of the pressure gradient in flow caused by the formation of dunes on the basis of Kovacs & Parker's formula including the effect of the local bed inclination. We performed a nonlinear stability analysis by the use of the sediment transport formula derived in this study. It is found that the transition between dune-covered and flat bed transition is charactrized by subcritical bifurcation even if the effect of the local bed inclination is large.

Journal

  • PROCEEDINGS OF HYDRAULIC ENGINEERING

    PROCEEDINGS OF HYDRAULIC ENGINEERING 49, 937-942, 2005

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130003842250
  • Text Lang
    UNK
  • ISSN
    0916-7374
  • Data Source
    J-STAGE 
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