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.
BS EN ISO 748:2007 history
1970BS EN ISO 748:2021 Hydrometry. Measurement of liquid flow in open channels. Velocity area methods using point velocity measurements (British Standard)
2007BS EN ISO 748:2007 Hydrometry - Measurement of liquid flow in open channels using current-meters or floats