In comparison with the SAMB results (Figure 3), it can be observed that the utilization of the SADB (Figure 4) resulted in modifications to the regression coefficients, and increased the coefficients of determination in all types of soil tillage.
2] values between the SADB (Figure 3) and the SAMB (Figure 4) can be explained by the differences between the two synthetic rainfall series.
However, the SADB (series adjusted on a daily basis) was identical to the historical series, with respect to both the number of rainy days and the total daily rainfall.
Both the total rainfall obtained with the SAMB and the SADB were equal to the rainfall recorded in the historical series.
The SADB coincided exactly with the distribution observed in the historical series, presenting a lower number of rainy days, and consequently, higher concentrations of the total precipitation during those days.
In the SADB, the rainy days and the total daily rainfall coincided with the historical series; thus, the monthly runoff estimation was better than the estimation performed with the SAMB.
Figure 6 presents the mean annual runoff measured and estimated through the model with the utilization of the SAMB and the SADB for the different types of soil tillage.