6.4. Bilans ioniques
Les concentrations ioniques des différents constituants figurent
aux Tableaux 39 et 40.
Les bilans ioniques montrent toujours un déficit en anions.
Par rapport à 2004, l’eau moyenne de 2005 a été plus
ou moins chargée en cations et anions suivant les stations.
A Péruwelz, on observe une nette augmentation de la charge en
anions et en cations. A l’opposé, l’ensemble de
la charge en ions diminue à la station de Liège.
En été, la charge en anions a diminué sauf à Jalhay
et la charge en cations diminuait également sauf à
Gembloux et à Jalhay. La baisse est bien marquée à la
station de Liège.
Paramètre |
PANT01
Péruwelz |
PANT02
Virelles |
PANT03
Gembloux |
PANT04
Offagne |
PANT05
Jalhay |
| |
2004 |
2005 |
2004 |
2005 |
2004 |
2005 |
2004 |
2005 |
2004 |
2005 |
H+ (µeq/l) |
0.86 |
0.41 |
0.17 |
2.19 |
9.41 |
8.69 |
0.25 |
0.36 |
7.37 |
11.13 |
Na+ (µeq/l) |
122.08 |
149.68 |
50.85 |
38.30 |
55.11 |
60.53 |
74.43 |
54.02 |
34.48 |
29.56 |
K+ (µeq/l) |
7.59 |
7.50 |
24.30 |
11.07 |
2.77 |
2.05 |
3.06 |
2.06 |
1.65 |
1.67 |
Ca++ (µeq/l) |
83.42 |
69.75 |
66.05 |
41.04 |
25.11 |
29.35 |
69.32 |
56.19 |
15.45 |
17.88 |
Mg++ (µeq/l) |
19.42 |
20.14 |
13.52 |
10.26 |
10.11 |
10.97 |
12.05 |
9.69 |
5.94 |
4.92 |
NH4+ (µeq/l) |
47.47 |
59.47 |
89.88 |
48.88 |
49.24 |
36.79 |
90.83 |
72.41 |
50.98 |
45.68 |
Cl- (µeq/l) |
66.22 |
69.79 |
30.97 |
28.34 |
34.34 |
37.10 |
41.97 |
36.15 |
17.99 |
19.85 |
F- (µeq/l) |
1.10 |
2.10 |
0.18 |
0.31 |
0.28 |
0.55 |
0.27 |
0.60 |
0.17 |
0.30 |
NO3- (µeq/l) |
33.08 |
42.20 |
28.48 |
33.35 |
24.41 |
25.58 |
30.33 |
30.01 |
25.33 |
28.90 |
SO4= (µeq/l) |
61.27 |
80.26 |
32.05 |
29.66 |
45.23 |
47.76 |
40.04 |
38.18 |
28.54 |
30.37 |
PO43- (µeq/l) |
1.38 |
0.64 |
6.41 |
2.53 |
0.54 |
3.19 |
1.31 |
0.36 |
1.18 |
0.73 |
Somme des cations |
280.84 |
306.95 |
244.76 |
151.74 |
151.74 |
148.37 |
249.94 |
194.73 |
115.87 |
110.84 |
Somme des anions |
163.05 |
194.99 |
98.09 |
94.19 |
104.80 |
114.19 |
113.91 |
105.30 |
73.21 |
80.16 |
Paramètre |
PANT07
Habay |
PANT08
Sinsin |
PANT09 (1)
Liège |
PANT10 (2)
Vielsalm |
| |
2004 |
2005 |
2004 |
2005 |
2004 |
2005 |
2004 |
2005 |
H+ (µeq/l) |
1.67 |
3.77 |
0.43 |
0.84 |
2.26 |
11.13 |
/ |
8.91 |
Na+ (µeq/l) |
79.51 |
35.99 |
74.38 |
82.46 |
46.64 |
36.48 |
/ |
24.71 |
K+ (µeq/l) |
2.77 |
2.86 |
2.34 |
3.42 |
3.94 |
2.21 |
/ |
2.33 |
Ca++ (µeq/l) |
39.64 |
25.95 |
59.55 |
57.26 |
85.97 |
41.74 |
/ |
8.35 |
Mg++ (µeq/l) |
9.44 |
5.30 |
12.17 |
15.82 |
15.16 |
12.33 |
/ |
4.69 |
NH4+ (µeq/l) |
63.40 |
51.30 |
58.36 |
48.67 |
89.14 |
44.01 |
/ |
27.71 |
Cl- (µeq/l) |
46.50 |
19.07 |
32.31 |
41.28 |
35.97 |
28.50 |
/ |
23.00 |
F- (µeq/l) |
0.12 |
0.36 |
0.33 |
1.02 |
1.66 |
1.22 |
/ |
0.36 |
NO3- (µeq/l) |
31.62 |
29.43 |
39.71 |
42.02 |
38.40 |
29.02 |
/ |
21.03 |
SO4= (µeq/l) |
34.73 |
26.50 |
38.24 |
45.46 |
73.46 |
57.07 |
/ |
21.48 |
PO43- (µeq/l) |
1.02 |
1.57 |
0.61 |
2.26 |
0.74 |
0.37 |
/ |
1.61 |
Somme des cations |
196.44 |
125.17 |
207.22 |
208.46 |
243.09 |
147.92 |
/ |
76.71 |
Somme des anions |
113.98 |
76.93 |
111.20 |
132.04 |
150.23 |
116.19 |
/ |
67.49 |
(1) à partir du 02/02/04
(2) à partir du 06/06/05
Tableau 39 : Réseau pluies - Composition ionique – 2004
et 2005
Paramètre |
PANT01
Péruwelz |
PANT02
Virelles |
PANT03
Gembloux |
PANT04
Offagne |
PANT05
Jalhay |
| |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
H+ (µeq/l) |
0.23 |
0.15 |
0.49 |
2.10 |
20.40 |
2.33 |
0.33 |
0.36 |
12.59 |
7.78 |
Na+ (µeq/l) |
209.41 |
139.08 |
70.60 |
23.93 |
72.08 |
52.96 |
63.55 |
39.28 |
31.28 |
27.29 |
K+ (µeq/l) |
7.24 |
6.95 |
42.18 |
9.56 |
1.35 |
2.40 |
1.34 |
2.27 |
1.41 |
1.79 |
Ca++ (µeq/l) |
101.08 |
72.42 |
102.76 |
31.88 |
20.88 |
36.68 |
66.95 |
56.90 |
10.32 |
22.28 |
Mg++ (µeq/l) |
30.15 |
13.71 |
22.99 |
6.35 |
12.95 |
10.09 |
13.72 |
7.66 |
5.17 |
4.24 |
NH4+ (µeq/l) |
65.44 |
69.23 |
49.39 |
47.47 |
19.74 |
47.98 |
87.42 |
55.15 |
36.96 |
50.56 |
Cl- (µeq/l) |
108.07 |
45.47 |
55.35 |
15.74 |
53.38 |
26.29 |
49.01 |
21.02 |
18.53 |
16.81 |
F- (µeq/l) |
2.18 |
1.98 |
0.28 |
0.31 |
0.25 |
0.71 |
0.20 |
0.62 |
0.09 |
0.34 |
NO3- (µeq/l) |
43.40 |
50.20 |
46.60 |
30.95 |
19.08 |
30.67 |
32.63 |
29.17 |
21.90 |
32.22 |
SO4= (µeq/l) |
97.73 |
77.50 |
37.11 |
26.75 |
52.83 |
45.36 |
43.00 |
33.99 |
25.94 |
31.69 |
PO43- (µeq/l) |
0.57 |
0.92 |
5.58 |
2.78 |
0.94 |
5.25 |
1.66 |
0.51 |
1.68 |
0.98 |
Somme des cations |
413.55 |
301.53 |
288.40 |
121.30 |
147.41 |
152.43 |
233.31 |
161.61 |
97.73 |
113.93 |
Somme des anions |
251.95 |
176.07 |
144.91 |
76.54 |
126.47 |
108.29 |
126.50 |
85.30 |
68.14 |
82.05 |
Paramètre |
PANT07
Habay |
PANT08
Sinsin |
PANT09 (1)
Liège |
PANT10 (2)
Vielsalm |
| |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
H+ (µeq/l) |
4.76 |
2.41 |
0.53 |
0.44 |
5.94 |
11.09 |
/ |
5.20 |
Na+ (µeq/l) |
74.36 |
18.98 |
111.17 |
72.78 |
53.61 |
24.15 |
/ |
19.85 |
K+ (µeq/l) |
3.66 |
2.52 |
1.80 |
4.79 |
3.80 |
1.70 |
/ |
2.43 |
Ca++ (µeq/l) |
24.80 |
32.00 |
52.91 |
67.26 |
95.97 |
32.43 |
/ |
9.81 |
Mg++ (µeq/l) |
9.18 |
4.31 |
17.06 |
16.20 |
15.65 |
8.15 |
/ |
3.75 |
NH4+ (µeq/l) |
58.13 |
51.28 |
52.34 |
55.69 |
32.15 |
46.48 |
/ |
32.61 |
Cl- (µeq/l) |
33.45 |
11.34 |
65.94 |
25.54 |
44.74 |
16.66 |
/ |
17.35 |
F- (µeq/l) |
0.51 |
0.32 |
0.59 |
1.11 |
1.59 |
1.10 |
/ |
0.47 |
NO3- (µeq/l) |
35.26 |
31.55 |
43.59 |
46.99 |
21.60 |
30.04 |
/ |
24.19 |
SO4= (µeq/l) |
33.62 |
25.29 |
45.08 |
48.56 |
75.10 |
51.60 |
/ |
23.17 |
PO43- (µeq/l) |
1.79 |
1.57 |
0.68 |
3.79 |
0.72 |
0.51 |
/ |
2.58 |
Somme des cations |
174.89 |
111.50 |
235.81 |
217.16 |
207.13 |
123.99 |
/ |
73.65 |
Somme des anions |
104.63 |
70.08 |
155.88 |
125.99 |
143.75 |
99.91 |
/ |
67.77 |
(1) à partir du 02/02/04
(2) à partir du 06/06/05
Tableau 40 : Réseau pluies - Composition ionique
- Hiver 2004/2005, Eté 2005 |
