Date of sampling
29-Dec 2008
14-Jan 2009
26-Jan 2009
9-Feb 2009
24-Feb 2009
9-Mar 2009
23-Mar 2009
6-Apr 2009
15-Apr 2009
30-Apr 2009
Arithmetic mean
θ [%]
24.3
24.8
25.4
25.8
25.4
25.6
25.7
25.6
25.4
24.5
25.3
pH
7.7
7.6
7.5
7.8
7.6
7.6
7.2
7.3
7.7
7.4
7.5
ECcalc [µS cm–1] at 25˚C (ECcalc/θ)
526.2 (21.7)
433.0 (17.5)
388.1
(15.3)
405.6
(15.7)
398.2
(15.7)
401.9
(15.7)
463.7
(18.0)
464.4
(18.1)
465.0
(18.3)
459.7
(18.8)
440.6
(17.5)
Cations [mg l–1]
Ca2+
(Ca2+/θ)
41.1
(1.69)
40.4
(1.63)
38.2
(1.50)
38.3
(1.48)
38.1
(1.50)
39.3
(1.54)
48.0
(1.87)
48.0
(1.88)
48.6
(1.91)
48.7
(1.99)
42.9
(1.70)
K+
(K+/θ)
45.6
(1.88)
39.3
(1.58)
37.1
(1.46)
33.8
(1.31)
32.9
(1.30)
32.8
(1.28)
33.7
(1.31)
33.7
(1.32)
33.6
(1.32)
33.8
(1.38)
35.6
(1.41)
Na+
(Na+/θ)
24.5
(1.01)
25.1
(1.01)
23.1
(0.91)
19.8
(0.77)
20.5
(0.81)
21.6
(0.84)
24.1
(0.94)
24.2
(0.95)
24.8
(0.98)
25.0
(1.02)
23.3
(0.92)
Mg2+
(Mg2+/θ)
5.1 (0.21)
4.8
(0.19)
4.4
(0.17)
5.3
(0.20)
5.1
(0.20)
5.2
(0.20)
6.6
(0.26)
6.6
(0.26)
6.7
(0.26)
6.8
(0.28)
5.7
(0.22)
Al3+
(Al3+/θ)
0.3
(0.01)
0.1
(0)
ND
ND
ND
ND
ND
ND
ND
ND
-
Anions [mg∙l–1]
Cl–
(Cl–/θ)
75.3
(3.10)
53.5
(2.16)
43.8
(1.72)
58.8
(2.28)
56.2
(2.21)
55.2
(2.16)
67.0
(2.61)
67.1
(2.62)
65.2
(2.57)
63.4
(2.59)
60.5
(2.4)
(
/θ)
44.3
(1.82)
27.1
(1.09)
20.9
(0.82)
19.5
(0.76)
19.3
(0.76)
19.1
(0.75)
20.8
(0.81)
20.8
(0.81)
21.7
(0.85)
20.2
(0.82)
23.4
(0.93)
(
/θ)
33.2
(1.36)
24.2
(0.98)
23.2
(0.91)
21.0
(0.81)
20.8
(0.82)
21.2
(0.83)
20.9
(0.81)
21.0
(0.82)
21.4
(0.84)
20.6
(0.84)
22.7
(0.90)
(
/θ)
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
-