Concepto |
Unidades |
1990 |
1995 |
2000 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
2013 |
Estación de medición |
Nombre |
|
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
El Álamo |
Distancia a la desembocadura |
km |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
58 |
Frecuencia
de muestreo anual |
Número |
5 |
3 |
3 |
3 |
2 |
1 |
2 |
2 |
6 |
6 |
3 |
6 |
Parámetros (promedio anual) |
Temperatura |
°C |
27.4 |
25.7 |
27.3 |
25.9 |
27.4 |
30.5 |
27.8 |
29.75 |
25.6 |
30.6 |
26.92 |
28.92 |
Acidez |
pH |
8.3 |
8.1 |
6.7 |
8.2 |
7.35 |
7.8 |
7.71 |
7.62 |
7.92 |
7.97 |
8.15 |
8.28 |
Oxígeno
disuelto |
mg O2 / l |
5.4 |
8.4 |
5.77 |
7.73 |
7.4 |
12 |
8.4 |
7.45 |
6.3 |
7 |
8.34 |
10.09 |
Saturación
de oxígeno |
% |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
104.93 |
128.51 |
DBO (20°C
5d) |
mg O2/ l |
nd |
1.3 |
3.04 |
4.27 |
4.05 |
19.2 |
4.66 |
4.77 |
1.6 |
2.32 |
<2 |
4.17 |
DQO (K2Cr2O7) |
mg O2/ l |
17 |
13 |
17.67 |
11.7 |
16.5 |
32 |
26 |
20 |
20 |
23 |
37.03 |
27.06 |
Sólidos
suspendidos |
mg/ l |
26.4 |
nd |
135.33 |
54.3 |
94 |
41 |
67.5 |
217.5 |
36 |
35 |
36 |
67 |
Sólidos
disueltos |
mg/ l |
619 |
778 |
704 |
620 |
613.5 |
684 |
512.5 |
624.5 |
827 |
812 |
471.81 |
498.56 |
Nitrógeno
total |
mg N/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.75 |
2.34 |
Nitratos |
mg NO3/ l |
0.1 |
0.15 |
0.58 |
0.63 |
0.98 |
0.53 |
1.35 |
4.34 |
1.8 |
0.63 |
3.27 |
2.53 |
Amonio |
mg NH4/ l |
nd |
0.03 |
0.06 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.2 |
0.33 |
Fósforo
total |
mg P/ l |
nd |
nd |
0.125 |
0.137 |
0.17 |
nd |
nd |
0.05 |
0.13 |
0.16 |
<0.5 |
0.07 |
Ortofosfatos |
mg P/ l |
0.046 |
0.04 |
0.56 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.02 |
Coliformes
fecales |
NMP/100 ml |
81 |
76 |
nd |
246.67 |
550 |
23 |
1,415 |
<3 |
3,500 |
1,015 |
7 |
356 |
Arsénico
total |
mg As/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.002 |
<0.002 |
Cadmio
total |
mg Cd/ l |
0.0005 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.0004 |
<0.0004 |
Cromo
total |
mg Cr/ l |
0.009 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
0.0043 |
Cobre
total |
mg Cu/ l |
0.1 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
Plomo
total |
mg Pb/ l |
0.01 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
<0.001 |
Mercurio
total |
mg Hg/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.001 |
0.001 |
Níquel
total |
mg Ni/ l |
0.05 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.0002 |
0.0015 |
Notas: |
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Ubicación
geográfica de la estación de medición: 22° 05' 46'' lat.N; 98° 08' 53'' long.
W. |
nd. No disponible |
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Fuente: |
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Comisión Nacional del Agua, Gerencia de
Calidad del Agua, Febrero 2015 |
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