26
RMSE
Y
Y
n
i
n
i
obs
i
¦ 1
2
mod
(3.24)
NSE
Y
Y
Y
Y
i
n
i
obs
i
i
n
i
obs
i
mean
ª
¬
«
«
º
¼
»
»
¦
¦
1
1
2
1
2
mod
(3.25)
where Y i
mod is the baseline rainfall erosivity, Y i
obs is the observed rainfall erosivity,
and Y i
mean is the mean of the observed and baseline rainfall erosivity.
3 Data Sources and Methodology