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  2. Essential Climate Variables
  3. River Discharge
  4. ECV Products and Requirements for River Discharge

ECV Products and Requirements for River Discharge

These products and requirements reflect the Implementation Plan 2016 (GCOS-200). GCOS is reviewing and will update the requirements until 2022. More information on: gcos.wmo.int.

 

PRODUCT DEFINITION FREQUENCY RESOLUTION REQUIRED MEASUREMENT UNCERTAINTY STABILITY STANDARDS/ REFERENCES
River Discharge Volume of water flowing through a river (or channel) cross-section per unit time Daily Per river 10 % (relative)   ISO/TC 113: WMO (2010) WMO (2008a) WMO (2009)
Water Level Elevation of the free-water surface of a body of water relative to a datum level Daily 100m 10 cm 1 cm/yr ISO/TC 113: WMO (2010) WMO (2008a) WMO (2009)
Flow Velocity Vector indicating the speed and direction, at a point, of a moving liquid Few times per year for station calibration Per river 10 % (relative)   ISO/TC 113: WMO (2010) WMO (2008a) WMO (2009)
Cross-Section Section perpendicular to the main direction of flow bounded by the free surface and wetted perimeter of the stream or channel (ISO 772) Few times per year for station calibration Per river 10 % (relative)   ISO/TC 113: WMO (2010) WMO (2008a) WMO (2009)

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