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A hyperconcentrated flow is a two-phase flowing mixture of water and sediment in a channel which has properties intermediate between fluvial flow and debris flow. Large quantities of sand may be transported throughout the flow column, but the transport of suspended and bedload sediment along the channel depends on flow turbulence and high flow velocities, and coarser sediment remains as bedload. Hyperconcentrated flows do not show the characteristics of non-Newtonian flow typical of debris flows, e.g., levees, coarsening up or matrix supported deposits.

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  • A hyperconcentrated flow is a two-phase flowing mixture of water and sediment in a channel which has properties intermediate between fluvial flow and debris flow. Large quantities of sand may be transported throughout the flow column, but the transport of suspended and bedload sediment along the channel depends on flow turbulence and high flow velocities, and coarser sediment remains as bedload. Hyperconcentrated flows do not show the characteristics of non-Newtonian flow typical of debris flows, e.g., levees, coarsening up or matrix supported deposits. Hyperconcentrated flows may contain anywhere from 5–60 % sediment by volume. Higher concentrations tend to be characteristic of debris flows, less of normal fluvial flow. (en)
  • Un écoulement hyperconcentré est un mélange diphasique d'eau et de sédiments dans un canal, qui a des propriétés intermédiaires entre écoulement fluvial et lave torrentielle. De grandes quantités de sable peuvent être transportées dans toute la colonne d'écoulement, mais le transport des sédiments en suspension et sur le fond, le long du canal, dépend de la turbulence de l'écoulement, des vitesses d'écoulement élevées, et des restes de sédiments plus grossiers restant en charge de fond. Les flux hyperconcentré ne présentent pas les caractéristiques des flux non-newtonien typique des laves torentielles. Les flux hyperconcentrés peuvent contenir en volume entre 5 et 60 % de sédiments. Des concentrations plus élevées ont tendance à être la caractéristique des laves torrentielles, moins celle de l'écoulement fluvial normal. (fr)
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  • A hyperconcentrated flow is a two-phase flowing mixture of water and sediment in a channel which has properties intermediate between fluvial flow and debris flow. Large quantities of sand may be transported throughout the flow column, but the transport of suspended and bedload sediment along the channel depends on flow turbulence and high flow velocities, and coarser sediment remains as bedload. Hyperconcentrated flows do not show the characteristics of non-Newtonian flow typical of debris flows, e.g., levees, coarsening up or matrix supported deposits. (en)
  • Un écoulement hyperconcentré est un mélange diphasique d'eau et de sédiments dans un canal, qui a des propriétés intermédiaires entre écoulement fluvial et lave torrentielle. De grandes quantités de sable peuvent être transportées dans toute la colonne d'écoulement, mais le transport des sédiments en suspension et sur le fond, le long du canal, dépend de la turbulence de l'écoulement, des vitesses d'écoulement élevées, et des restes de sédiments plus grossiers restant en charge de fond. Les flux hyperconcentré ne présentent pas les caractéristiques des flux non-newtonien typique des laves torentielles. (fr)
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  • Hyperconcentrated flow (en)
  • Écoulement hyperconcentré (fr)
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