Table 3 Fit results for the modified Hardin-Drnevich model.

Sampling site	w (%)	σ_3c (kPa)	m	n	k	G_d0−test (MPa)	G_d0−fit (MPa)	R² (G_d)	λ_max−test (%)	λ_max−fit (%)	R² (λ)
BJ	16	100	0.667	0.504	−2.059	68.244	61.017	0.953	0.161	0.172	0.923
	18	100	0.512	0.734		55.385	55.292	0.972	0.192	0.199	0.810
	20	100	0.448	0.522		49.707	50.241	0.970	0.219	0.230	0.979
	18	200	0.741	0.328		90.996	85.687	0.939	0.145	0.146	0.936
	18	300	0.940	0.218		108.193	97.871	0.980	0.132	0.131	0.779
YL	16	100	0.667	0.537	−2.059	62.356	60.914	0.968	0.142	0.145	0.946
	18	100	0.512	1.013		51.330	50.574	0.940	0.152	0.161	0.817
	20	100	0.448	0.951		42.907	36.418	0.867	0.178	0.188	0.871
	18	200	0.741	1.094		58.241	57.720	0.962	0.129	0.142	0.907
	18	300	0.940	1.063		83.648	82.127	0.974	0.122	0.139	0.983
XY	16	100	0.667	0.323	−2.059	55.437	51.970	0.995	0.113	0.113	0.954
	18	100	0.512	0.414		48.685	48.238	0.970	0.135	0.134	0.871
	20	100	0.448	0.631		38.611	36.920	0.963	0.170	0.176	0.872
	18	200	0.741	0.613		56.378	56.595	0.997	0.106	0.102	0.820
	18	300	0.940	0.244		69.463	71.871	0.996	0.091	0.092	0.761
XA	16	100	0.667	0.323	−2.059	51.985	52.085	0.993	0.100	0.108	0.950
	18	100	0.512	0.360		42.685	45.104	0.984	0.110	0.109	0.875
	20	100	0.448	0.408		36.507	35.302	0.929	0.158	0.161	0.634
	18	200	0.741	0.287		47.663	46.115	0.994	0.103	0.103	0.916
	18	300	0.940	0.319		55.548	58.546	0.874	0.102	0.103	0.912
WN	16	100	0.667	0.203	−2.059	50.833	55.919	0.897	0.077	0.077	0.804
	18	100	0.512	0.477		40.782	49.000	0.932	0.094	0.108	0.960
	20	100	0.448	0.516		35.319	36.039	0.916	0.145	0.165	0.937
	18	200	0.741	0.243		46.511	50.478	0.919	0.094	0.094	0.899
	18	300	0.940	0.229		51.367	52.940	0.857	0.099	0.099	0.933

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