Table 4

Selected concentrations of constituents in waters from Sarzedas.

SampleDateT (°C)pHEh (mV)D. ox. (mg l−1)Sp. cond. (μS cm−1)Na (mg l−1)K (mg l−1)Ca (mg l−1)Mg (mg l−1)Fe (mg l−1)Mn (mg l−1)As (mg l−1)Sb (mg l−1)Pb (μg l−1)Zn (mg l−1)HCO3 (mg l−1)Cl (mg l−1)SO42 −  (mg l−1)NO3 (mg l−1)NO2 (mg l−1)PO42 −  (mg l−1)Dry residue (mg l−1)
1wFebruary 200212.55.6628710.80124.67.230.191.057.84<0.010<0.010<0.002<0.0021100<0.02012.3511.5631.001.1560.0100.00695
July 200319.55.502215.35142.07.630.301.549.920.1190.007<0.002<0.002310.08610.5613.1532.291.080<0.0020.01097
5wFebruary 200212.16.312196.25148.48.351.044.3811.461.1600.2300.006<0.002<0.30.03040.509.5620.480.031<0.0020.054108
August 200219.86.66445.82140.99.070.784.619.980.5580.112<0.002<0.002<0.30.02248.827.2324.830.460<0.002<0.00479
March 200312.76.161984.31120.16.580.783.739.702.0300.246<0.002<0.002<0.3<0.02043.215.2612.44<0.0010.0040.05670
11wMarch 200313.96.312095.85100.59.780.323.448.481.8800.166<0.002<0.002<0.3<0.02042.227.8924.050.7900.0160.03692
July 200318.46.31905.50175.011.381.125.0511.215.5500.459<0.002<0.002<0.30.05265.979.2119.120.290<0.0020.304108
2stFebruary 200211.75.982685.5281.87.600.420.664.820.100<0.010<0.0020.095<0.3<0.02036.769.567.930.9770.0200.06793
March 200312.96.381749.3256.05.67<0.050.764.44<0.010<0.010<0.0020.124<0.3<0.02019.137.892.490.4100.0060.01633
3stFebruary 20029.76.1927112.65164.07.790.933.0511.460.100<0.0100.0212.6001.00.03011.259.0649.6110.092<0.0020.051126
March 200312.56.2322910.40136.06.340.362.7911.160.049<0.010<0.0020.798<0.3<0.02013.197.8940.640.720<0.0020.03697
4stAugust 200221.97.2520410.32125.011.021.003.377.120.4540.022<0.002<0.002<0.3<0.02041.569.3615.460.0900.0120.00966
March 200313.66.5416911.4354.05.060.361.022.460.079<0.010<0.002<0.002<0.3<0.02013.1910.52<1.66<0.0010.024<0.00434
6stAugust 200227.89.3219714.70234.522.763.258.1514.402.2000.234<0.002<0.002<0.3<0.020107.8616.3118.270.4300.1430.472181
July 200319.86.302217.9583.08.660.761.523.040.142<0.010<0.002<0.002490.08925.0713.155.190.2800.0080.02255
7stAugust 200223.26.831376.42112.710.960.722.206.661.3500.098<0.002<0.002<0.3<0.02036.947.0915.000.520<0.0020.01860
March 200316.46.6122811.0054.15.640.550.772.910.053<0.010<0.002<0.002<0.3<0.02014.517.894.980.3400.0060.01851
8stFebruary 200213.46.6520812.6064.86.680.370.763.320.050<0.010<0.0020.028<0.3<0.02013.259.062.640.757<0.0020.01467
August 200228.27.172028.91229.416.242.055.7216.720.0630.014<0.0020.211<0.3<0.02036.289.5094.500.4100.0100.200148
July 200320.27.221648.60108.08.650.521.726.150.345<0.010<0.0020.097<0.30.28724.4110.5216.660.470<0.0020.03278
9stFebruary 200212.76.5320613.2066.46.680.410.913.320.1200.020<0.0020.007<0.3<0.02013.009.064.48<0.001<0.002<0.00453
July 200324.66.131569.95122.09.612.293.625.650.2150.024<0.002<0.002540.34226.3915.7811.391.8700.0140.14282
10stFebruary 200212.06.5127212.1063.97.050.531.052.560.070<0.010<0.002<0.002<0.3<0.02014.5911.363.480.0500.0070.01149
July 200323.36.60927.8093.59.121.261.883.260.195<0.010<0.002<0.002<0.31.18122.4310.524.780.4800.006<0.00462
VMAh259.5ndnd400200ndndnd0.20.050.010.00525ndnd25025050ndndnd
VMRrndndndndndndndndnd50.20.1nd50002nd7057550ndndnd
  • T, temperature, D. ox., dissolved oxygen, Sp. cond, specific conductivity; w, well; st, stream. nd, not defined. 1, 5 and 11 are well samples; 2–4 and 6–10 are stream samples. VMAh, human permitted values under Portuguese law (Anon. 2007); VMRr, agricultural recommended values under Portuguese law (Anon. 1998).