AS 3778.4.11:1991 (R2009)
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Measurement of water flow in open channels – Measurement using flow gauging structures – End-depth method for estimation of flow in non-rectangular channels with a free overfall (approximate method)
| Published By | Publication Date | Number of Pages |
| AS | 1991-09-23 | 20 |
Specifies a method for the estimation of sub-critical flow of water in smooth, essentially horizontal, straight open channels with a vertical drop and discharging freely. It is technically identical with and reproduced from ISO 4371:1984.
Scope
This International Standard specifies a method for the estimation of subcritical flow of clear water in smooth, essentially horizontal, straight open channels with a vertical drop and discharging freely. Gentle positive slopes not greater than 1 in 2 000 are admissible. This International Standard covers channels with the following types of cross-section, the nappe being unconfined:
a) trapezoidal;
b) triangular;
c) parabolic;
d) circular.
Using the measured depth at the end, the flow can be estimated.
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