- -78%
AS 3778.3.3:2022 Measurement of water flow in open channels Velocity-area methods - Measurement by slope-area method (ISO 1070:2018, IDT)
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AS 3778.3.3:2022 identically adopts ISO 1070:2018, which specifies a method of determining discharge in open channels from observations of the surface slope and cross-sectional area of the channel.