Modeled and observed fate of chlorocymenes

Two steady state models, Canadian PPEFF and German WATER/CemoS, were used to evaluate the fate of five chlorocymenes and one chlorocymenene discharged in decreasing amounts into the River Kymijoki in southern Finland during 1990–1993. Concentrations estimated with the both models were comparable with each other: for water quite the same, for sediment and fish slightly higher with PPEFF. In the end of the study period observed contents in sediment and fish were significantly higher than the modeled ones. This result points out need for dynamic, unsteady state model to predict the future fate of pollutants when emissions change in time.