Cosmoss: conceptual simplified model for sewer system simulation: A new model for urban runoff quality

In order to minimise storm water impact on receiving waters, mathematical models to simulate processes occurring in sewer systems are needed. The aim of this study is to propose a simple and reliable conceptual model for simulating suspended solids discharge during storm events. The model has been tested using experimental data acquired in Parco d'Orleans catchment, Palermo, in Fossolo catchment, Bologna, and in Milijakovac catchment, Belgrade. Results obtained show the need to extend the experimental investigations in order to obtain more reliable information about the washoff rate.