Table 4.

PCCA factor coordinates of the variables and the eigenvalues of the correlation matrix.

Tracer	PC 1	PC 2	PC 3	Communalities
Ca	0.79	0.37	0.32	0.87
Co	0.51	−0.54	−0.57	0.88
Fe	0.55	−0.67	0.22	0.79
Mg	0.89	−0.37	0.08	0.93
Mn	0.82	0.34	0.03	0.80
OC	−0.42	−0.42	0.69	0.83
Sr	0.93	0.24	0.11	0.93
Eigenvalue	3.7	1.4	1.0
% Total variance	52.9	19.4	13.9
Cumulative % variance	52.9	72.3	86.2
Mean scores of the three sediment sources
Recreational road	−1.36 a1	−0.13 a	−0.19 a
Hillslope surface soils	−0.62b	0.12 a	−1.29b
Channel banks	0.79c	0.79b	0.81 a
ANOVA results
F-value	92.1	11.3	15.2
p-value	<0.0001	<0.001	<0.001

¹Different small letters indicate that scores are significantly different at the 5% level, based on the Tukey HSD Post Hoc test.