Users are encouraged to obtain actual measurements of the water levels in the field drains. Users will need to key in the annual average of the water level in each management unit/block with peat. In the absence of actual field measurements, PalmGHG applies a default of 60 cm if there is active water management and 80 cm if there is no water management. However, when applying the defaults, users should provide some justification that the default value is appropriate to their field situation.