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Trend determination of pollution load at different discharges by the example of heavy metal concentrations in suspended sediments

, : Trend determination of pollution load at different discharges by the example of heavy metal concentrations in suspended sediments. Zeitschrift fuer Wasser- und Abwasser- Forschung 20(1): 1-5

The trend of pollution load in streams cannot be determined on the basis of annual mean values. It seems appropriate to work out first a concentration/discharge relationship from which the data for selected standardized discharge values (MNQ, MQ, MHQ) may be obtained in order to set up the actual trend curve. The proposed method is described by example of the undissolved heavy metals cadmium, chrome, copper, lead and zinc for the Rhine at Koblenz during the period 1973 to 1984.

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