Stormwater quality control for sustainable urban drainage systems

Abstract

The paper deals with the performance assessment of stormwater facilities in mitigating the negative effects of urban runoff pollutants carried both to the receiving environment and to the urban drainage system. Experimental campaigns and numerical simulations have been carried out on a residential catchment of Pavia, Lombardia, Italy. The rainfall-runoff process and the pollutant dynamics in the catchment and combined sewer network were simulated using a conceptual model based on an instantaneous unit hydrograph of a single linear reservoir system for individual events as well as for a continuous run of events and inter-event periods over one year. Several design confi gurations and operating conditions of fl ow regulators (FRs) and stormwater detention tanks (SWDTs) have been evaluated by defi ning performance indicators that simultaneously account for a large number of technical, environmental, and socio-economic constraints.