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About This Item


Full Description

This document specifies methods for determining the velocity and cross-sectional area of water flowing in open channels and for calculating the discharge employing point velocity measurement devices.

It is applicable to methods using rotating-element current meters, acoustic doppler velocimeters (ADVs), acoustic doppler current profiler (ADCP) stationary method, surface velocity measurement including floats and other surface velocity systems.

Although some general procedures are discussed, this document does not describe in detail how to use or deploy these systems.

NOTE°°°°°°°° For detailed procedures, refer to guidelines from instrument manufacturers and the appropriate public agencies.


Document History

  1. ISO 748:2021


    Hydrometry - Measurement of liquid flow in open channels - Velocity area methods using point velocity measurements

    • Most Recent
  2. ISO 748:2007

    Hydrometry - Measurement of liquid flow in open channels using current-meters or floats

    • Historical Version
  3. ISO 748:1997

    Measurement of liquid flow in open channels - Velocity-area methods

    • Historical Version