évapotranspiration réelle

CONT: [...] l'évapotranspiration potentielle se distingue de l'évapotranspiration réelle, E.T.R. qui représente l'eau perdue en réalité, réduite par rapport à E.T.P.
CONT: [...] l'évaporation réelle ET correspond à ce que l'on a longtemps appelé évapotranspiration réelle ETR.

CONT: Actual Evapotranspiration (AET) ... equals PET [potential evapotranspiration], if the maximum percolation (i.e. adjusted precipitation less overland runoff) is greater than or equal to PET. If maximum percolation is less than PET, then there is not enough new moisture to entirely satisfy PET. Thus, AET will equal the sum of maximum percolation and the amount by which soil moisture storage is reduced (i.e., maximum percolation minus the change in soil moisture storage between the current and previous months).