Rainfall zone	Curve	RSS	AIC	R2
Summer	Linear	32.96	15.56	0.18
	Loess	26.96	20.40	0.001
Uniform	Loess	5.42	−21.43	0.92
	Sigmoid	7.40	−18.08	0.89
	Linear	29.53	9.75	0.57
Winter	Sigmoid	1.83	−29.86	0.94
	Loess	2.20	−22.87	0.93
	Linear	9.24	−6.36	0.70

Within each rainfall zone, models are ordered from best to worst using AIC.