Maximum yield or pumping rate of a groundwater well doublet per square meter at a given location.

Mean measured groundwater temperature based on surveys.

Annual maximum groundwater temperature.

The intrinsic ability of hard rock samples to conduct heat.

Annual minimum groundwater temperature.

Specific annual thermal energy content for heating and / or cooling referring per surface area for borehole heat exchangers at a defined length.

Measured effective average interval thermal conductivity also accounting for advective heat transport caused by groundwater. The data is obtained from Thermal Response Tests.

The intrinsic ability of unconsolidated sediment to conduct heat.

Energy content available per year in a defined volume of a groundwater body for heating and/or cooling applications

The maximum temperature shift between the production and the injection well that is possible with regards to legal or ecological limitations.