246
Table 8.2 Statistics summary of major ions resulting from the descriptive analysis of groundwater samples collected from the Strumica region
Unit
Mn
Mn(BC) Md
Min
Max
P
25
P
75
S
CV
A(BC)
B(BC)
Shallow groundwater (n = 138)
d
m
20
3.4
18
4.5
70
15
21.5
10
49.5
0.04
1.9
pH
–
7.9
125
7.8
6.8
8.6
7.5
8.3
0.4
5.6
−0.06
−1.2
ECw
mmho/cm
5.3
2.1
5.2
1.2
17.5
3.5
6.3
2.7
50.6
−0.00
0.2
HCO
3
−
mg/l
277
6.5
299
0.05
751
128
420
173
62.4
−2.6
6
NO
3
−
mg/l
27.8
2.4
3.7
0.1
284
1.1
34.3
51.6
186
0.6
−0.9
NO
2
−
mg/l
0.03
−3.1
0.03
<0.05
0.5
0.03
0.03
0.04
142
7.3
54
NH
4
+
mg/l
0.6
−2.1
0.06
<0.05
56
0.03
0.3
4.8
743
1.9
6.8
PO
4
3−
mg/l
0.4
−1.6
0.2
0.07
0.3
0.07
0.3
0.6
175
0.6
0.5
SO
4
2−
mg/l
30.2
3.4
21
0.8
300
11.7
31
40
132
−0.06
0.4
Cl
−
mg/l
48.5
4.2
40
7.4
614
20.7
54.5
60
124
0.5
1.5
Na
mg/l
6.5
1.9
5.7
1.4
27
3.6
7.7
4.4
68
0.4
0.2
Ca
mg/l
57
4.6
44.5
7.4
411
28.4
79.6
44
77
0.2
0.4
Mg
mg/l
16.5
2.9
12.3
1.1
96
7.4
21.3
13.4
81
0.01
−0.1
K
μg/l
14.6
2.2
6.5
1.2
354
4
8.9
42
289
1.7
5.5
Mn
μg/l
480
5.1
20.8
<0.5
3329
4
860
672
140
0.1
0.4
Fe
μg/l
163
5.4
57.8
<0.05
3166
50
111
365
224
−0.4
0.4
Deep groundwater (n = 53)
d
m
91
5.5
90
18.5
130
80
96
−3.5
20.3
17.9
19.7
pH
–
7.8
9.2
7.7
7
8.7
7.4
8.2
0.3
−1.1
0.5
5.8
ECw
mmho/cm
3.8
3.4
3.9
1.5
6.4
2.6
5
0.2
−0.8
1.3
32.8
HCO
3
−
mg/l
253
7.1
244
79
419
171
335
−0.4
−0.7
99
39.2
B. Kovacevik et al.
Table 8.2 Statistics summary of major ions resulting from the descriptive analysis of groundwater samples collected from the Strumica region
Unit
Mn
Mn(BC) Md
Min
Max
P
25
P
75
S
CV
A(BC)
B(BC)
Shallow groundwater (n = 138)
d
m
20
3.4
18
4.5
70
15
21.5
10
49.5
0.04
1.9
pH
–
7.9
125
7.8
6.8
8.6
7.5
8.3
0.4
5.6
−0.06
−1.2
ECw
mmho/cm
5.3
2.1
5.2
1.2
17.5
3.5
6.3
2.7
50.6
−0.00
0.2
HCO
3
−
mg/l
277
6.5
299
0.05
751
128
420
173
62.4
−2.6
6
NO
3
−
mg/l
27.8
2.4
3.7
0.1
284
1.1
34.3
51.6
186
0.6
−0.9
NO
2
−
mg/l
0.03
−3.1
0.03
<0.05
0.5
0.03
0.03
0.04
142
7.3
54
NH
4
+
mg/l
0.6
−2.1
0.06
<0.05
56
0.03
0.3
4.8
743
1.9
6.8
PO
4
3−
mg/l
0.4
−1.6
0.2
0.07
0.3
0.07
0.3
0.6
175
0.6
0.5
SO
4
2−
mg/l
30.2
3.4
21
0.8
300
11.7
31
40
132
−0.06
0.4
Cl
−
mg/l
48.5
4.2
40
7.4
614
20.7
54.5
60
124
0.5
1.5
Na
mg/l
6.5
1.9
5.7
1.4
27
3.6
7.7
4.4
68
0.4
0.2
Ca
mg/l
57
4.6
44.5
7.4
411
28.4
79.6
44
77
0.2
0.4
Mg
mg/l
16.5
2.9
12.3
1.1
96
7.4
21.3
13.4
81
0.01
−0.1
K
μg/l
14.6
2.2
6.5
1.2
354
4
8.9
42
289
1.7
5.5
Mn
μg/l
480
5.1
20.8
<0.5
3329
4
860
672
140
0.1
0.4
Fe
μg/l
163
5.4
57.8
<0.05
3166
50
111
365
224
−0.4
0.4
Deep groundwater (n = 53)
d
m
91
5.5
90
18.5
130
80
96
−3.5
20.3
17.9
19.7
pH
–
7.8
9.2
7.7
7
8.7
7.4
8.2
0.3
−1.1
0.5
5.8
ECw
mmho/cm
3.8
3.4
3.9
1.5
6.4
2.6
5
0.2
−0.8
1.3
32.8
HCO
3
−
mg/l
253
7.1
244
79
419
171
335
−0.4
−0.7
99
39.2
B. Kovacevik et al.