POTET or PE; the amount of moisture that would evaporate and transpire if adequate moisture were available; it is the amount lost under optimum moisture conditions, the moisture demand.
The amount of water evaporated and/or transpired in a given environment
The maximum amount of water that can soak into a soil per unit of time
How does heavily deforested areas impact the areas water budget?
Because trees gather water through extensive and usually deep root systems that transpire water vapor through leaves that often are tens of meters above the ground surface. Trees use so much water that they are the dominant medium for returning rainwater to the atmosphere in large forested regions