Environmental and engineering performance assessment of biofilters and retention systems for pavement stormwater

摘要

This work is aimed at investigating the use of green infrastructure technologies for the infiltration of stormwater runoff from urban road pavements into soil, and as a means to support the evapotranspiration and harvesting processes. Porous concrete pavements and vegetated biofilters were considered to assess pollutant removal and hydraulic performances. The investigations were at bench-scale for single materials, and at column and box scale for composite structures. The pollutant reduction was determined on the basis of suspended solids, heavy metals and hydrocarbon concentration, with promising results that were found to be dependent on filter material characteristics, layer distribution, and permeability.