Historical
ISO 1438-1:1980
Water flow measurement in open channels using weirs and Venturi flumes - Part 1 : Thin-plate weirs
Specifies methods for the measurement of water flow in open channels using rectangular and triangular-notch (V-notch) thin-plate weirs. The flow conditions considered are limited to steady, free and fully ventilated discharge. Recommended discharge coefficients are applicable to water only in the approximate range of temperatures from 5 to 30 °C.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]