Variation Characteristics of the Main Hydrochemical Indexes in Typical Subterranean Rivers in the South China Karst Region Based on Curve Fitting

Table 4

Comparison of the main indexes in the Maocun subterranean river basin (mg.L^-1).

Sampling sites	Indexes
	Ca^2+	Mg^2+
MC-1 (2015)	19.00	1.10	12.20
MC-2 (2015)	17.00	3.78	36.60
MC-3 (2015)	25.00	7.25	103.70
MC-4 (2015)	106.00	12.42	353.80
MC-5 (2015)	72.00	9.76	213.50
MC-6 (2015)	79.00	9.80	250.10
Average MC-4~ MC-6	85.67	10.66	279.17
Max of Reference [9]	94.30	11.51	298.20