Variations of the Physicochemical Parameters and Metal Levels and Their Risk Assessment in Urbanized Bagmati River, Kathmandu, Nepal

Table 4

Principal Component Analysis (PCA) of elements in the Bagmati River basin within Kathmandu Valley.

Elements	Component
	1	2	3
Nb	.880	.389	.050
Y	.880	.309	.211
V	.868	.115	.209
Be	.865	.010	.276
Ga	.743	.573	.303
Ti	.716	.501	.429
Mn	.297	.850	.250
Co	.532	.783	.198
Ni	.309	.770	.540
Cr	.222	.763	.566
Mo	.047	.723	.485
Cd	.132	.208	.817
Cu	.251	.459	.771
Zn	.342	.494	.738
Rb	.221	.629	.725
Li	.523	.350	.674
Sc	.550	.181	.638
% of variance	69.31%	12.83%	8.79%
Eigen value	11.79	2.18	0.99