afflux (plural affluxes)

  1. An upward rush of fluid.
    • 1874 January 9, "Chemical News from Foreign Sources," Chemical News , page 26, of waterspouts:
      The vis viva of these affluxes is employed almost wholly in turning the mass of intermediate gas […]
  2. (hydrology) The rise in water level (above normal) on the upstream side of a bridge or obstruction caused when the effective flow area at the obstruction is less than the natural width of the stream immediately upstream of the obstruction.
    • 2004, Transportation Association of Canada, Guide to Bridge Hydraulics , ISBN 0727732625, page 66 :
      Backwater due to the crossing as a whole should not be confused with local afflux at piers due to pileup of flow against the hydraulic stagnation point […]

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