AS 3778.2.3:2023 identically adopts ISO 18320:2020, which specifies methods of determining the stage–discharge relationship for gauging stations.
AS 3778.2.3:2023 PDF
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Measurement of water flow in open channels, Part 2.3: General – Determination of the stage-discharge relationship (ISO 18320:2020, IDT)
Standards Australia , 11/17/2023
