Carbonate Chemistry and Isotope Characteristics of Groundwater of Ljubljansko Polje and Ljubljansko Barje Aquifers in Slovenia

Table 1

Descriptive statistics of relevant chemical and isotopic parameters in groundwater of Ljubljansko polje and Ljubljansko Barje aquifers.

			Molar ratio
	Ca^2+	Mg^2+	Ca/Mg	HCO3^−	𝛿^18O	Tritium
	mg/L	mg/L	/	mg/L	‰	TU
Ljubljansko polje aquifer (𝑛=43)
Arithmetic mean	80.9	18.9	2.60	292	−8.9	5.84
Standard deviation	10.7	2.9	0.3	29	0.2	1.3
Median	82.5	19	2.7	292	−8.9	6.1
Minimum	59.0	13.5	1.30	230	−9.4	0.41
Maximum	100.0	27.5	3.12	369	−8.6	7.97
Northern part of Ljubljansko Barje aquifer (𝑛=4)
Arithmetic mean	77.4	27.0	1.8	329	−8.8	5.5
Standard deviation	28.9	3.1	0.8	75	0.2	1.2
Median	69.8	26.5	1.6	315	−8.8	5.3
Minimum	46.0	23.5	1.0	238	−9.0	3.9
Maximum	124.0	31.5	3.0	446	−8.6	7.3
Middle part of Ljubljansko Barje aquifer (𝑛=8)
Arithmetic mean	41.8	17.8	1.6	227	−9.3	3.1
Standard deviation	16.1	9.2	0.5	86	0.3	3.1
Median	39.8	13.3	1.4	198	−9.3	2.1
Minimum	21.5	9.7	1.1	127	−10.0	0.2
Maximum	70.0	36.0	2.4	383	−9.1	8.5
Brest and Iški vršaj in southern part of Ljubljansko Barje aquifer (𝑛=9)
Arithmetic mean	61.0	30.9	1.2	322	−9.5	7.1
Standard deviation	10.2	4.8	0.0	52	0.1	1.5
Median	58.5	30.0	1.2	317	−9.5	6.9
Minimum	50.5	26.0	1.1	273	−9.6	5.8
Maximum	82.0	40.5	1.2	429	−9.2	11.2
Surface waters (𝑛=5)
Arithmetic mean	46.0	16.0	2.1	208	−9.1	5.4
Standard deviation	15.9	9.0	0.9	77	0.4	1.7
Median	49.0	12.0	2.3	231	−9.0	6.1
Minimum	17.5	4.6	1.0	68	−9.6	2.2
Maximum	66.5	31.0	3.5	294	−8.5	6.6