| 6.4. Bilans ioniques
Les concentrations ioniques des différents constituants figurent aux
Tableaux 42 et 43.
Les bilans ioniques montrent toujours un déficit en anions. Par rapport
à 2003, leau moyenne en 2004 a été moins chargée en cations sauf aux
stations de Péruwelz et Virelles et Sinsin. Pour les anions, on observe
soit une diminution comme à Péruwelz, Offagne, Jalhay et Habay soit
une augmentation comme Virelles, Gembloux et Sinsin.
A lexception des stations de Péruwelz et Virelles, on constate une
diminution de la charge des cations entre lhiver et lété. Par contre,
la charge anionique diminue partout.
| Paramètre |
PANT01
Péruwelz |
PANT02
Virelles |
PANT03
Gembloux |
PANT04
Offagne |
PANT05
Jalhay |
| |
2003 |
2004 |
2003 |
2004 |
2003 |
2004 |
2003 |
2004 |
2003 |
2004 |
| H+ (µeq/l) |
2.24 |
0.86 |
1.31 |
0.17 |
11.21 |
9.41 |
0.21 |
0.25 |
5.38 |
7.37 |
| Na+ (µeq/l) |
90.35 |
122.08 |
56.17 |
50.85 |
55.08 |
55.11 |
80.03 |
74.43 |
95.08 |
34.48 |
| K+ (µeq/l) |
7.84 |
7.59 |
22.31 |
24.30 |
4.69 |
2.77 |
9.01 |
3.06 |
9.83 |
1.65 |
| Ca++ (µeq/l) |
68.78 |
83.42 |
52.30 |
66.05 |
37.43 |
25.11 |
64.29 |
69.32 |
35.05 |
15.45 |
| Mg++ (µeq/l) |
17.25 |
19.42 |
12.52 |
13.52 |
10.18 |
10.11 |
13.87 |
12.05 |
11.09 |
5.94 |
| NH4+ (µeq/l) |
65.18 |
47.47 |
46.11 |
89.88 |
50.93 |
49.24 |
98.80 |
90.83 |
59.80 |
50.98 |
| Cl- (µeq/l) |
70.94 |
66.22 |
38.58 |
30.97 |
33.88 |
34.34 |
42.83 |
41.97 |
32.14 |
17.99 |
| F- (µeq/l) |
2.42 |
1.10 |
1.30 |
0.18 |
1.13 |
0.28 |
5.63 |
0.27 |
1.50 |
0.17 |
| NO3- (µeq/l) |
32.58 |
33.08 |
22.58 |
28.48 |
24.17 |
24.41 |
33.39 |
30.33 |
36.35 |
25.33 |
| SO4= (µeq/l) |
54.97 |
61.27 |
30.45 |
32.05 |
44.17 |
45.23 |
42.59 |
40.04 |
38.26 |
28.54 |
| PO43- (µeq/l) |
2.85 |
1.38 |
1.30 |
6.41 |
0.41 |
0.54 |
1.78 |
1.31 |
9.35 |
1.18 |
| Somme des cations |
251.63 |
280.84 |
190.73 |
244.76 |
169.52 |
151.74 |
266.20 |
249.94 |
216.23 |
115.87 |
| Somme des anions |
163.75 |
163.05 |
94.21 |
98.09 |
103.77 |
104.80 |
126.22 |
113.91 |
117.59 |
73.21 |
| Paramètre |
PANT06 (1)
Liège |
PANT07
Habay |
PANT08
Sinsin |
PANT09 (2)
Liège |
| |
2003 |
2004 |
2003 |
2004 |
2003 |
2004 |
2003 |
2004 |
| H+ (µeq/l) |
0.73 |
0.12 |
0.79 |
1.67 |
0.57 |
0.43 |
/ |
2.26 |
| Na+ (µeq/l) |
69.73 |
135.01 |
87.44 |
79.51 |
51.49 |
74.38 |
/ |
46.64 |
| K+ (µeq/l) |
7.68 |
8.18 |
8.46 |
2.77 |
5.84 |
2.34 |
/ |
3.94 |
| Ca++ (µeq/l) |
103.50 |
155.10 |
63.51 |
39.64 |
61.18 |
59.55 |
/ |
85.97 |
| Mg++ (µeq/l) |
19.51 |
29.41 |
11.35 |
9.44 |
11.90 |
12.17 |
/ |
15.16 |
| NH4+ (µeq/l) |
101.79 |
55.43 |
74.19 |
63.40 |
69.57 |
58.36 |
/ |
89.14 |
| Cl- (µeq/l) |
42.70 |
83.36 |
33.86 |
46.50 |
27.00 |
32.31 |
/ |
35.97 |
| F- (µeq/l) |
2.43 |
1.67 |
6.57 |
0.12 |
2.37 |
0.33 |
/ |
1.66 |
| NO3- (µeq/l) |
40.38 |
36.02 |
36.06 |
31.62 |
34.65 |
39.71 |
/ |
38.40 |
| SO4= (µeq/l) |
75.50 |
103.44 |
38.90 |
34.73 |
32.89 |
38.24 |
/ |
73.46 |
| PO43- (µeq/l) |
0.84 |
1.70 |
2.33 |
1.02 |
0.62 |
0.61 |
/ |
0.74 |
| Somme des cations |
302.95 |
383.27 |
245.76 |
196.44 |
200.55 |
207.22 |
/ |
243.09 |
| Somme des anions |
161.85 |
226.19 |
117.72 |
113.98 |
97.52 |
111.20 |
/ |
150.23 |
(1) arrêtée le 12/04/04
(2) à partir du 02/02/04
Tableau 42 : Réseau pluies - Composition ionique
2003 et 2004
| Paramètre |
PANT01
Péruwelz |
PANT02
Virelles |
PANT03
Gembloux |
PANT04
Offagne |
PANT05
Jalhay |
| |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
| H+ (µeq/l) |
3.88 |
0.86 |
0.28 |
0.17 |
23.96 |
9.41 |
0.11 |
0.25 |
8.06 |
7.37 |
| Na+ (µeq/l) |
125.12 |
122.08 |
76.72 |
50.85 |
76.98 |
55.11 |
119.53 |
74.43 |
52.54 |
34.48 |
| K+ (µeq/l) |
9.54 |
7.59 |
38.69 |
24.30 |
4.51 |
2.77 |
7.50 |
3.06 |
5.44 |
1.65 |
| Ca++ (µeq/l) |
70.22 |
83.42 |
72.74 |
66.05 |
25.86 |
25.11 |
58.11 |
69.32 |
21.03 |
15.45 |
| Mg++ (µeq/l) |
24.33 |
19.42 |
19.67 |
13.52 |
14.23 |
10.11 |
15.24 |
12.05 |
9.73 |
5.94 |
| NH4+ (µeq/l) |
40.26 |
47.47 |
31.49 |
89.88 |
29.85 |
49.24 |
111.19 |
90.83 |
47.25 |
50.98 |
| Cl- (µeq/l) |
90.84 |
66.22 |
54.00 |
30.97 |
57.35 |
34.34 |
65.34 |
41.97 |
33.16 |
17.99 |
| F- (µeq/l) |
4.34 |
1.10 |
2.42 |
0.18 |
1.67 |
0.28 |
6.76 |
0.27 |
2.05 |
0.17 |
| NO3- (µeq/l) |
34.46 |
33.08 |
21.51 |
28.48 |
22.08 |
24.41 |
33.20 |
30.33 |
25.76 |
25.33 |
| SO4= (µeq/l) |
67.96 |
61.27 |
32.45 |
32.05 |
49.93 |
45.23 |
49.87 |
40.04 |
29.84 |
28.54 |
| PO43- (µeq/l) |
2.70 |
1.38 |
2.17 |
6.41 |
0.84 |
0.54 |
0.81 |
1.31 |
1.06 |
1.18 |
| Somme des cations |
273.35 |
280.84 |
239.59 |
244.76 |
175.39 |
151.74 |
311.68 |
249.94 |
144.06 |
115.87 |
| Somme des anions |
200.30 |
163.05 |
112.55 |
98.09 |
131.87 |
104.80 |
155.98 |
113.91 |
91.87 |
73.21 |
| Paramètre |
PANT06 (1)
Liège |
PANT07
Habay |
PANT08
Sinsin |
PANT09 (2)
Liège |
| |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
Hiver |
Eté |
| H+ (µeq/l) |
0.43 |
/ |
0.44 |
1.65 |
0.51 |
0.43 |
1.99 |
2.26 |
| Na+ (µeq/l) |
119.84 |
/ |
152.03 |
79.51 |
77.33 |
74.38 |
106.79 |
46.64 |
| K+ (µeq/l) |
8.12 |
/ |
6.64 |
2.79 |
6.90 |
2.34 |
6.16 |
3.94 |
| Ca++ (µeq/l) |
122.84 |
/ |
61.72 |
42.39 |
49.81 |
59.55 |
78.51 |
85.97 |
| Mg++ (µeq/l) |
29.17 |
/ |
14.78 |
9.60 |
15.17 |
12.17 |
26.38 |
15.16 |
| NH4+ (µeq/l) |
65.12 |
/ |
58.34 |
62.65 |
58.66 |
58.36 |
125.97 |
89.14 |
| Cl- (µeq/l) |
84.10 |
/ |
95.10 |
46.50 |
49.17 |
32.31 |
83.19 |
35.97 |
| F- (µeq/l) |
2.89 |
/ |
9.93 |
0.13 |
4.41 |
0.33 |
1.68 |
1.66 |
| NO3- (µeq/l) |
35.68 |
/ |
30.11 |
32.22 |
33.79 |
39.71 |
55.24 |
38.40 |
| SO4= (µeq/l) |
91.00 |
/ |
38.56 |
37.66 |
36.35 |
38.24 |
93.11 |
73.46 |
| PO43- (µeq/l) |
1.44 |
/ |
2.30 |
1.01 |
0.83 |
0.61 |
0.88 |
0.74 |
| Somme des cations |
345.51 |
/ |
293.95 |
198.60 |
208.38 |
207.22 |
345.81 |
243.09 |
| Somme des anions |
215.11 |
/ |
176.00 |
117.51 |
124.55 |
111.20 |
234.10 |
150.23 |
(1) arrêtée le 12/04/04
(2) à partir du 02/02/04
Tableau 43 : Réseau pluies - Composition ionique -
Hiver 2003/2004, Eté 2004
|
