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Reducing urban pollution remains a delicate subject to handle Nowadays many studies focus on assessing an environment where degradation is most likely to occur. It is in this context that the present work focuses on the degradation of organic parameters (BOD5, COD, TSS, O2, NO-3, pH, temperature, Turbidity) in different environments: natural (river), artificial canal, river (to the shores coated). Data processing carried out of the above three observation sites over two seasons (with different rules) was used to follow the degradation kinetics parameters. The assessment of the pollution level by calculating the coefficient of degradation (Kd) for each site, show a degradation in space (the environment degrades better pollution than other sites) and in time, there is a marked decrease in the pollution from January to march. It emerges from this study that the degradation of the pollution in natural environment is optimal, compared with semi-natural environnement.

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Comportement des Polluants des Eaux Pluviales Urbaines en Réseaux d’Assainissement ( Caractéristiques et Origines ) : Cas de la Plaine d’Annaba = Behavior of Pollutants in Urban Storm Water Sewer Systems ( Characteristics and Origins ) : The Case of the Plain of Annaba