Fig. 1. Spatial distribution of the 56 meteorological stations and 9 small evaporation observe stations. The nine stations identified with a letter are used as selected examples.
Fig. 2. Relationships between estimated ETo (reference evapotranspiration) by FAO-56 PM (FAO-56 Penman-Monteith equation) and PM-Rs (FAO Penman-Monteith equation with missing solar radiation) at nine selected meteorological stations using scatter plots.
Fig. 3. Relationships between estimated ETo (reference evapotranspiration) by FAO56-PM (FAO-56 Penman- Monteith equation) and Hargreaves at nine selected meteorological stations using scatter plots.
Fig. 4. Normal distribution of mean FAO56-PM (FAO-56 Penman-Monteith equation) reference evapotranspiration to 56 meteorological stations.
Fig. 5. Normal distribution of mean FAO56-PM (FAO-56 Penman-Monteith equation ) reference.
Table 1. Results of the ME, MAE, RMSE as determined by the RET model.
Table 2. Results of the coefficient of determination as determined by the reference evapotranspiration model.
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