UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

ISO 4359

Flow measurement structures - Rectangular, trapezoidal and U-shaped flumes

active, Most Current
Buy Now
Organization: ISO
Publication Date: 15 February 2013
Status: active
Page Count: 84
ICS Code (Flow in open channels): 17.120.20
scope:

This International Standard specifies methods for the measurement of flow in rivers and artificial channels under steady or slowly varying flow conditions, using certain types of standing-wave, or critical-depth, flumes.

A wide variety of flumes has been developed, but only those which have received general acceptance after adequate research and field testing, and which therefore do not require in situ calibration, are considered.

The flow conditions considered are uniquely dependant on the upstream head, i.e. subcritical flow must exist upstream of the flume, after which the flow accelerates through the contraction and passes through its critical depth. The water level downstream of the structure is low enough to have no influence upon its performance.

This International Standard is applicable to three commonly used types of flumes, covering a wide range of applications, namely rectangular-throated, trapezoidal-throated and U-throated. Typical field installations. Site conditions are important and shows acceptable velocity profiles in the approach channel.

Detailed illustrations of the three types of flumes covered by this International Standard are given as follows:

a) rectangular-throated;

b) trapezoidal-throated;

c) U-throated, i.e. round-bottomed.

It is not applicable to a form of flume referred to in the literature - sometimes called a "Venturi" flume - in which the flow remains subcritical throughout.

NOTE This form is based on the same principle as a Venturi meter used within a closed conduit system and relies upon gauging the head at two locations and the application of Bernoulli's energy equation.

Document History

June 1, 2017
Flow measurement structures - Rectangular, trapezoidal and U-shaped flumes AMENDMENT 1
A description is not available for this item.
ISO 4359
February 15, 2013
Flow measurement structures - Rectangular, trapezoidal and U-shaped flumes
This International Standard specifies methods for the measurement of flow in rivers and artificial channels under steady or slowly varying flow conditions, using certain types of standing-wave, or...
July 1, 1983
Liquid Flow Measurement in Open Channels - Rectangular, Trapezoidal and U-Shaped Flumes
A description is not available for this item.

References

Advertisement