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scikits.hydroclimpy.lib.evaporation.PotentialEvapoTranspiration.Hansen

PotentialEvapoTranspiration.Hansen(Rs=None)

Computes the PET with the Hansen (1957) method [Hansen_1957].

PET = 0.70 \cfrac{\Delta}{\Delta+\gamma} \cfrac{R_s}{\lambda_H}

Parameters:

Rs : TimeSeries, optional

Incoming solar radiations [MJ.m-2.d-1]. If None, Rs is estimated from extraterrestrial solar radiations (Ra) and minimum and maximum temperatures as K_{t} \sqrt{\Delta\;T} Ra.