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

Table 3

Statistical results of groundwater chemistry data of the multilayered aquifer system of Zhanjiang.

		Ca^2+	Mg^2+	Na^+	K^+		Cl^−			SiO2	TDS	pH		(Na + K)/Cl
		(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)	(mg/L)		(°C)
Unconfined aquifer	Minimum	9.42	1.8	6.54	1.4	5.34	8.44	14.26	0.5	3.83	149	4	21	0.38
	Maximum	105.15	70.67	105.67	146.6	324.44	203.94	172.38	120	25.65	823.39	8.25	27	4.44
	Average	37.27	14.55	43.36	25.18	106.91	76.77	62.61	41.36	11.21	360.28	6.04	23.59	1.58
Middle confined aquifer	Minimum	2.44	1.2	3.97	1.45	5.45	2.62	1.2	0.1	10.9	64.31	4.15	24	0.57
	Maximum	22.48	10.07	24.12	10.14	93.79	72.64	38.18	15	54.11	252.94	7.34	30	6.28
	Average	7.40	4.59	11.30	5.63	47.24	14.86	14.62	1.64	30.52	124.47	6.25	27.31	2.22
Deep confined aquifer	Minimum	2.44	2.08	3.97	4.73	5.09	0.85	1.15	0.1	9.89	99.52	5.34	30	0.91
	Maximum	53.35	13.63	54.47	47.81	249.57	37.54	51.1	11	60.05	325.98	7.81	35	25.03
	Average	9.78	4.93	16.04	12.14	90.33	9.15	10.13	1.21	38.28	158.01	6.72	31.67	6.95