Historical
ISO 1438:2008
Hydrometry - Open channel flow measurement using thin-plate weirs
ISO 1438:2008 defines the requirements for the use of rectangular and triangular (V-notch) thin-plate weirs for the measurement of flow of clear water in open channels under free flow conditions. It includes the requirements for the use of full-width rectangular thin-plate weirs in submerged (drowned) flow conditions.
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International Organization for Standardization [iso]
International Organization for Standardization [iso]