Three permeable car park systems were simulated with SWMM LID model. For the two vegetated permeable car parks (ECOVEGETAL Mousses and ECOVEGETAL Green), the choice was made to use the SWMM bioretention module while the permeable pavement module was used for a mineral permeable car park (ECOVEGETAL Minéral). One year of rainfall and potential evapotranspiration were used to simulated water flows through the structure of these parking lots. Calibration and sensibility analysis were conducted and quality of the simulations were estimated with a Nash–Sutcliffe efficiency coefficient and a water budget criterion. Good results were obtained for the mineral and ECOVEGETAL Mousses car parks. Bioretention module seems not suitable if the structure of the parking is too complex.
Varnede et al. (Mon,) studied this question.