EN ISO 18365:2013

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 General requirements and considerations
5 Water level (Stage) only gauging stations
6 Stage-discharge gauging stations
7 Stage- discharge gauging stations using
   hydraulic structures
8 Velocity-discharge gauging stations
9 Measurement under difficult conditions
10 Operation and maintenance
Annex A (informative) - Applicable conditions for
        selection of discharge measurement method
Bibliography

ISO 18365:2013 gives requirements for the establishment and operation of a gauging station for the measurement of stage, or stage and discharge, of a lake, reservoir, river or canal or other artificial open channel. It also describes how a gauging station utilising one of the measurement methods listed should be operated and maintained.Requirements are provided for stage only measurement stations, stage-discharge stations and direct-discharge measurement stations in natural channels, as well as for stage-discharge stations with artificial structures. Additionally, some requirements are given for measurements under difficult conditions, such as under ice conditions.