This International Standard specifies methods for determining the velocity and cross-sectional area of water
flowing in open channels without ice cover, and for computing the discharge therefrom.
It covers methods of employing current-meters or floats to measure the velocities. It should be noted that
although, in some cases, these measurements are intended to determine the stage-discharge relation of a
gauging station, this International Standard deals only with single measurements of the discharge; the
continuous recording of discharges over a period of time is covered in ISO 1100-1 and ISO 1100-2.
NOTE The methods for determining the velocity and cross-sectional area of water flowing in open channels with ice
cover are specified in ISO 9196.