pyet.temperature.romanenko

pyet.temperature.romanenko(tmean, rh, k=4.5, rhmax=None, rhmin=None, tmax=None, tmin=None, clip_zero=True)

Potential evapotranspiration calculated according to Romanenko (1961).

Parameters:

• tmean (float or pandas.Series or xarray.DataArray) – average day temperature [°C].

• rh (float or pandas.Series or xarray.DataArray) – mean daily relative humidity [%].

• k (float, optional) – calibration coefficient [-].

• tmax (float or pandas.Series or xarray.DataArray) – maximum day temperature [°C].

• tmin (float or pandas.Series or xarray.DataArray) – minimum day temperature [°C].

• rhmax (pandas.Series, optional) – maximum daily relative humidity [%].

• rhmin (pandas.Series, optional) – mainimum daily relative humidity [%].

• clip_zero (bool, optional) – if True, replace all negative values with 0.

Returns:

• float or pandas.Series or xarray.DataArray containing the calculated potential

• evapotranspiration [mm d-1].

Examples

>>> pet_romanenko = romanenko(tmean, rh)

Notes

Based on equation 11 in (Xu and Singh, 2001).

\[PET=k(1 + (\frac{T_{mean}}{25})^2 (1 - \frac{e_a}{e_s})\]