This part of ISO 1100 specifies methods of determining the stage-discharge relation for a gauging station. A sufficient number of discharge measurements, complete with corresponding stage measurements, is required to define a stage-discharge relation to the accuracy required by this part of ISO 1100.

Stable and unstable channels are considered, including brief descriptions of the effects on the stage-discharge relation of ice and hysteresis. Methods for determining discharge for twin-gauge stations, ultrasonic velocity stations, electromagnetic velocity stations, and other complex ratings are not described in detail. These types of rating are described in other International Standards and Technical Reports, namely ISO/TR 9123, ISO 6416 and ISO 9213, as shown in clause 2.

This standard is identical with AS 3778 2.3:2001 which is current in Australia.

Versions

• International:
  • ISO 1100-2:1998 Measurement of liquid flow in open channels — Part 2: Determination of the stage-discharge relation (This version is identical with the current Australian and Indian standards)
    
  • ISO 1100-2:2010 Hydrometry — Measurement of liquid flow in open channels channels — Part 2: Determination of the stage-discharge relationship (This version has not been adopted in Australia)
• Australia: AS 3778 2.3:2001 is identical with ISO 1100-2:1998
• India: IS 15119-2:2002 is identical with ISO 1100-2:1998

Access the standard

If your organisation has a subscription for Australian standards, you can access AS 3778.2.3:2001 from your organisation’s portal

Public.resource.org has made a copy of the Indian standard IS 15119-2:2002 (identical to the ISO 1100-2:1998 standard) freely available (available via the link below)