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Table 3 highlights the performance of the WRF model forecasts in comparison with observed data for the entire forecast horizon of 9 days over the Secugnago site. The forecast of the day +0, i.e., the forecast of the same day of the model initialization, is here omitted, since it would not be exploitable for irrigation scheduling management.

Table 3

MAE for the WRF meteorological model over the Secugnago area from day +1 to day +8 as lead time of forecast

MAEDay +1Day +2Day +3Day +4Day +5Day +6Day +7Day +8
Temperature [°C] 2.43 2.25 2.2 2.17 2.12 2.00 1.94 2.27 
Relative humidity [−] 0.06 0.06 0.06 0.06 0.07 0.07 0.08 0.08 
Daily precipitation [mm] 2.23 1.87 3.02 3.15 2.77 3.70 6.70 5.48 
Incoming solar radiation [W/m281.04 80.79 80.57 83.58 84.18 90.34 84.75 87.49 
Wind speed [m/s] 1.65 1.63 1.71 1.61 1.60 1.58 1.67 1.77 
MAEDay +1Day +2Day +3Day +4Day +5Day +6Day +7Day +8
Temperature [°C] 2.43 2.25 2.2 2.17 2.12 2.00 1.94 2.27 
Relative humidity [−] 0.06 0.06 0.06 0.06 0.07 0.07 0.08 0.08 
Daily precipitation [mm] 2.23 1.87 3.02 3.15 2.77 3.70 6.70 5.48 
Incoming solar radiation [W/m281.04 80.79 80.57 83.58 84.18 90.34 84.75 87.49 
Wind speed [m/s] 1.65 1.63 1.71 1.61 1.60 1.58 1.67 1.77 

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