The Risk Assessment of Sediment Heavy Metal Pollution in the East Dongting Lake Wetland

Table 5

Total variance explained and rotated component matrix (two principal components selected) for heavy metal contents in the sediments from the East Dongting Lake wetlands. Factor loadings exceeding 0.5 are expressed in bold font.

Component	Initial eigenvalues			Component matrixes	Rotated component matrix
	Total	% of variance	Cumulative %		C1	C2
1	1.958	48.960	48.960	Cd	−0.034	0.907
2	1.414	35.089	84.049	Cr	0.923	0.079
3	0.410	10.240	94.289	Ni	0.934	0.066
4	0.228	5.711	100	Pb	0.185	0.877