Table 1.

Parameters of the rainfall model and the soil moisture model

Parameter	Average	Wet	Dry
Rainfall model
$\rho ,$ ${\text{km}}^{-1}$	0.047	0.047	0.047
$\eta ,$ ${\text{d}}^{-1}$	7.12	7.12	7.12
$\lambda ,$ ${\text{km}}^{-2}\cdot {\text{d}}^{-1}$	$8.99\times {10}^{-5}$	$1.17\times {10}^{-4}$	$6.29\times {10}^{-5}$
${\mu }_X,$ $\text{mm}\cdot {\text{d}}^{-1}$	37.74	43.55	26.96
Soil moisture model
$a_1,$ ${\text{d}}^{-1}$	0.014	0.014	0.014
$b_1,$ ${\text{mm}}^{-1}$	0.002	0.002	0.002
$a_2,$ ${\text{d}}^{-1}$	0.025	0.025	0.025
$b_2,$ ${\text{mm}}^{-1}$	0.006	0.006	0.006
$\alpha$	5.84	5.84	5.84
$\beta$	0.755	0.755	0.755
${\sigma }^2$	0.187	0.187	0.187
Mean rainfall during growing season, mm	497.42	746.12	248.71
Mean soil moisture during growing season, case 1	0.195	0.292	0.097
Mean soil moisture during growing season, case 2	0.341	0.511	0.170

The values of parameters in column “average” are estimated from real data (12, 17). The rainfall parameters are changed to what are called the wet and dry cases when the mean growing season rainfall is 50% more or 50% less than the average rainfall case. Two sets of parameters are used to represent different infiltration and evapotranspiration conditions. The parameters of the jitter are considered independent of the rainfall and representative of the local fluctuations in soil, topology, and vegetation in savannas (12).