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RESEARCH PRODUCT

Modelling urban stormwater impact mitigation by using bmps and storage tanks

subject

description

The continuous growth of urban areas and the increasing public awareness about environmental impact of stormwater raised high interest on quality impact on the receiving water bodies. Indeed, in the last decades, large efforts have been provided for improving urban drainage systems in order to mitigate environmental impacts. In the present paper, a simplified modelling approach has been developed in order to evaluate the mitigation efficiency of different BMP schemes including infiltration and storage facilities and both considering possible distributed controls and centralised structures. The main goals of the research are the simulation of BMP efficiency in different operational conditions considering performance reduction due to clogging phenomena and the comparison between different mitigation measures schemes. For this reason long term simulation has been used in order to take into account also the effect of sediments in BMP hydraulic capacity reduction. The developed simplified models have been calibrated and applied to the Parco d\342\200\231Orl\303\250ans experimental catchment (Palermo \342\200\223 Italy). The analysis results allowed for some interesting consideration about BMP design criteria and the possibility of adopting different BMP techniques in mixed mitigation schemes.