BS 3680-4A:1981 Measurement of liquid flow in open channels. Weirs and flumes. Thin-plate weirs (AMD 5438) (AMD 10209) (Withdrawn)
Specifies the installation, head measurement and assessment of the accuracy of discharge formulae for 2 types of weir - rectangular thin-plate and triangular notch thin-plate weirs. Also covers the assessment of the accuracy of discharge measurement.
Superseded by BS ISO 1438:2008.
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