Table 2. Allometric equations using diameter at breast height (DBH) and/or tree height as an independent variable (s) for each street tree species (p<0.001).

Species	DBH (cm)	Models	Parameters			R2	RMSE
			a	b	c
Acer buergerianum	9.5 — 38.9	aDb	0.00010	2.3471		0.763	0.0829
		aD+bD2	−0.00140	0.0005		0.780	0.0768
		aD2+bD+c	0.00004	0.0185	−0.2053	0.804	0.0716
		a+bD2	0.00330	0.0004		0.783	0.0754
		a+bD+cH	−0.2826	0.0176	0.0170	0.814	0.0697
Ginkgo biloba	11.8 — 37.3	aDb	0.0002	2.2631		0.825	0.0850
		aD+bD2	−0.0014	0.0006		0.824	0.0850
		aD2+bD+c	0.0006	−0.0033	0.0205	0.825	0.0846
		a+bD2	−0.0159	0.0005		0.824	0.0847
		a+bD+cH	−0.3923	0.0233	0.0162	0.836	0.0817
Metasequoia glyptostroboides	19.5 — 50.7	aDb	0.00005	2.6837		0.777	0.2208
		aD+bD2	−0.01103	0.0009		0.783	0.2165
		aD2+bD+c	0.00073	0.0011	−0.1892	0.784	0.2161
		a+bD2	−0.17092	0.0007		0.784	0.2161
		a+bD+cH	−1.07024	0.0285	0.0544	0.819	0.1979
Prunus armeniaca	11.3 — 49.3	aDb	0.000253	2.135400		0.830	0.0958
		aD+bD2	0.000348	0.000393		0.840	0.0877
		aD2+bD+c	−0.000001	0.021880	−0.25920	0.869	0.0774
		a+bD2	0.029110	0.000364		0.839	0.0859
		a+bD+cH	−0.352304	0.019612	0.01969	0.881	0.0738