ISO 1088:2007 Hydrometry - Velocity-area methods using current-meters - Collection and processing of data for determination of uncertainties in flow measurement
ISO 1100-2:2010 Hydrometry - Measurement of liquid flow in open channels - Part 2: Determination of the stage-discharge relationship
ISO 18320 Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship*, 2020-08-03 Update
ISO 5168:2005 Measurement of fluid flow - Procedures for the evaluation of uncertainties