Multivariate Analysis of Confined Groundwater Hydrochemistry of a Long-Exploited Sedimentary Basin in Northwest China

Table 2

Correlation matrix of the 13 physicochemical water parameters. The values are the correlation coefficients ().

	pH	TH	TDS	Ca^2+	Mg^2+	K^+	Na^+
pH	1
TH	−0.277	1
TDS	−0.484	0.674	1
Ca^2+	−0.372	0.825	0.706	1
Mg^2+	0.058	0.555	0.153	−0.012	1
K^+	−0.094	0.581	0.205	0.359	0.500	1
Na^+	−0.459	0.259	0.883	0.461	−0.222	−0.119	1
	−0.463	0.438	0.873	0.622	−0.141	0.113	0.885	1
	−0.474	0.562	0.895	0.519	0.231	0.207	0.783	0.662	1
	−0.222	0.756	0.476	0.482	0.629	0.29	0.141	0.081	0.406	1
	−0.184	−0.093	−0.196	−0.087	−0.036	0.273	−0.202	−0.128	−0.163	−0.148	1
	−0.261	0.063	0.26	0.063	0.019	−0.041	0.286	0.391	0.244	−0.187	0.012	1
	−0.114	−0.399	0.188	−0.093	0.57	−0.38	0.509	0.236	0.237	−0.257	−0.208	−0.013	1

Correlation = significant at the level 0.01 (2-tailed).
Correlation = significant at the level 0.05 (2-tailed).