According to the documentation on HydPy-Evap-RET-TW2002 The implemented Turc-Wendling should be applied to daily data. We agreed to support subdaily time steps by averaging air temperature and global radiation using log sequences. This means we get highly smoothed evapotranspiration estimates that show no diurnal cycle, but that should be fine for many hydrological applications. At least we would avoid introducing bias by applying the Turc-Wendling equation incorrectly.
According to the documentation on HydPy-Evap-RET-TW2002 The implemented Turc-Wendling should be applied to daily data. We agreed to support subdaily time steps by averaging air temperature and global radiation using log sequences. This means we get highly smoothed evapotranspiration estimates that show no diurnal cycle, but that should be fine for many hydrological applications. At least we would avoid introducing bias by applying the Turc-Wendling equation incorrectly.