varwg.meteo.meteox2y.turc

varwg.meteo.meteox2y.turc(at, ts, mon)

calculates the potential evapotranspiration following Turc [1] as described in the Hydrologie-I-Skript (p. 55)

Parameters:

atfloat or numpy.array of floats

daily average air temperature [degC]

tsfloat or numpy.array of floats

number of sunshine hours per day

monint or numpy.array of ints

month: 1=january, 12=december

Returns:

etpfloat or numpy.array of floats

potential evapotranspiration [mm] daily values

See also

haude

evapotranspiration following Haude

Notes

The Turc formula is only valid for at > 0 deg C

References

[1]

TURC??

Examples

>>> "%.9f" % turc(10,0,5)
'1.104000000'

>>> "%.9f" % turc(10,0,12)
'0.408000000'