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

ECV Products and Requirements for Groundwater

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
Groundwater storage change The volumetric loss or gain of groundwater between two time periods Monthly 100 km 10 cm TBD  
Groundwater level The level of water table, the upper surface of the saturated portion of the soil or bedrock Weekly Per well 1 cm   ISO 21413:2005
Groundwater recharge Natural process where permeable soil or rock allow water to readily seep into the aquifer Weekly Per well 10 % (relative)    
Groundwater discharge Process in which groundwater leaves the aquifer at discharge zones Weekly Per well 10 % (relative)    
Wellhead level Elevation of a well Weekly Per well 1 cm    
Groundwater quality Chemical, physical and biological characteristics of groundwater that are relevant to the services that it provides Weekly Per well tbd   ISO/TC 147; ISO 5667-18:2001 part 18

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