ISO 2425:1974/Amd 1:1982

Measurement of flow in tidal channels — Amendment 1

Mesure de débit dans les canaux à marée — Amendement 1

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-1982
• Withdrawal Date: 30-Nov-1982
• ICS: 17.120.20 - Flow in open channels
• Technical Committee: ISO/TC 113 - Hydrometry
• Drafting Committee: ISO/TC 113 - Hydrometry
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 20-Apr-1999

Relations

• Revised: ISO 2425:1999 - Measurement of liquid flow in open channels under tidal conditions
• Effective Date: 15-Apr-2008
• Amends: ISO 2425:1974 - Measurement of flow in tidal channels
• Effective Date: 06-Jun-2022
• Child: ISO 2425:1974 - Measurement of flow in tidal channels
• Effective Date: 15-Apr-2008

Standards Content (Sample)

INTERNATIONAL STANDARD ISO 2425=1974/AMENDMENT 1
Public 1982-12-01
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*ME)ttllYHAPO~HAR OPrAHM3ALWl fl0 CTAH~APTM3AL@¶M@ORGANISATION INTERNATIONALE DE NORMALISATION
Measurement of flow in tidal channels
AMENDMENT 1
Amendment 1 to International Standard ISO 24251974 was developed by Technical Committee ISO/TC 113, Measurernent ofliguid
lt was submitted directly to ISO Council, in accordance with clause 6.11.2 of Part 1 of the Directives for the
flow in open channels.
technical work of ISO.
Page 7
2 References
Add the following :
“ISO 4369, Liquid flow measurement in open channels - The moving boat method.
Measurement of discharge b y the ultrasonic (acoustic) method.
ISO 6416, Liquid flow measurement in open channels -
ISO 6418, Liquid flow measurement in open channels - Ultrasonic (acous tic) Vetocity meters. ”
Page 2
4 Units of measurement
Delete the existing text and Substitute the following :
“SI units of measurement are used in this International Standard.”
5 Principles of the method of measurement
Sub-clause 5.3
Renumber to read “5.4” and Substitute by the following :
“5.3 Ultrasonic method
The ultrasonic method measures flow at certain elevations in the channel by transmitting pulses in both directions through the
water from transducers in the banks on both sides of the channel. The main restriction to the use of the method in tidal channels is
the occurrence of density gradients, suspended Sediment and path length.”
~~~~~~
UDC 532.57 : 627.13 Ref. No. : ISO 2425.1974/Al-1982 (E)
Descriptors : tides, tide channels, flow measurement.
0 International Organization for Standardization, 1982 l
Prix bas6 sur 4 pages
Imprim6 en Suisse

---------------------- Page: 1 ----------------------
ISO 2425-l974/Al-1
Page 7
8 Direct measurement of tidal flow by t
Delete the existing title and text and Substitute by the kollswing :
“8 Direct measurement
nd ultrasonic (acausticb s
The moving boat and ultrasonic methock rnay be applicable in eilher steady or unsteady flow. They are dealt vvith in BS0 4369,
ISO 6416 and ISO 6418.”
Pages 74 and 75
Replace the tables in annexes B and C by the following :

---------------------- Page: 2 ----------------------
Annex B
Example of cubature computation (sec 9.5)
Distance between upper and Iower stations (/) : 19,812 km
Date : 26 March 1955
River : Hooghly
Upper Station : Akra
l-ieadwater discharge : Nil
Tide : Spring
Lower Station : Moyapur
16
6
3
Lower Station
Total
Change in
Total of
volume up
Change in Volume of
Average
to tidal
Change in
volume qeadwater
Change in
level at Mean
limit
Average
Level Level Discharge :
volume :
volume up up to discharge Cross-
beginning A
...