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Full Description

Specifies a method for the estimation of sub-critical flow of clear water in smooth, straight, rectangular prismatic open channels with a vertical drop and discharging freely. Using the measured depth at the end, the flow in rectangular channels (horizontal or sloping) with confined nappe and unconfined nappe may be estimated.

 

Document History

  1. ISO 18481:2017


    Hydrometry - Liquid flow measurement using end depth method in channels with a free overfall

    • Most Recent
  2. ISO 4371:1984


    Measurement of liquid flow in open channels by weirs and flumes - End depth method for estimation of flow in non-rectangular channels with a free overfall (approximate method)

    • Historical Version
  3. ISO 3847:1977

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    Liquid flow measurement in open channels by weirs and flumes - End-depth method for estimation of flow in rectangular channels with a free overfall

    • Historical Version