Geofluids

Research Article

Hydrochemistry and Isotope Hydrology for Groundwater Sustainability of the Coastal Multilayered Aquifer System (Zhanjiang, China)

Table 4

Correlation matrix between TDS and the major ions.


	Ca²⁺	Mg²⁺	Na⁺	K⁺		Cl⁻			TDS

Unconfined aquifer ()
Ca²⁺	1
Mg²⁺	0.188	1
Na⁺	0.635	0.185	1
K⁺	0.601	0.406	0.314	1
	0.734	−0.141	0.196	0.351	1
Cl⁻	0.561	0.693	0.801	0.481	−0.036	1
	0.595	0.346	0.580	0.758	0.222	0.649	1
	0.451	0.670	0.503	0.566	−0.126	0.798	0.473	1
TDS	0.814	0.570	0.766	0.774	0.356	0.881	0.788	0.760	1
Middle confined aquifer ()
Ca²⁺	1
Mg²⁺	0.554	1
Na⁺	0.204	0.085	1
K⁺	0.098	0.096	0.368	1
	0.550	0.193	0.237	0.204	1
Cl⁻	0.348	0.391	0.648	0.294	−0.239	1
	−0.173	0.262	−0.111	−0.049	−0.707	0.305	1
	−0.012	−0.194	−0.081	−0.312	−0.339	0.152	−0.022	1
TDS	0.715	0.704	0.518	0.290	0.272	0.632	0.217	−0.119	1
Deep confined aquifer ()
Ca²⁺	1
Mg²⁺	0.431	1
Na⁺	0.300	0.727	1
K⁺	0.181	0.388	0.468	1
	0.503	0.826	0.845	0.584	1
Cl⁻	0.713	0.661	0.656	0.381	0.564	1
	0.392	0.146	0.272	0.162	0.003	0.630	1
	0.795	0.267	−0.018	−0.143	0.365	0.464	0.143	1
TDS	0.606	0.844	0.849	0.569	0.851	0.835	0.425	0.463	1