ACUTE POLLUTION OF RECIPIENTS IN URBAN AREAS

Oxygen and ammonia concentration are key parameters of acute water pol lution in urban rivers. These two abiotic parameters are statistically assessed for a historical rain series by means of a simplified determ inistic model of the integrated drainage system. Continuous simulation of the system performance indicates that acute water pollution is cau sed by intermittent discharges from both sewer system and wastewater t reatment plant. Neglecting one of them in the evaluation of the enviro nmental impact gives a wrong impression of total system behavior. Dete ntion basins and alternative operational modes in the treatment plant under wet weather loading have a limited positive effect for minimizin g acute water pollution. (C) 1997 IAWQ. Published by Elsevier Science Ltd.