TY - JOUR AU - Franco, Brenda Mello AU - Andres, Cacio Miranda AU - Konrad, JĂșlia AU - Tassi, Rutineia AU - Liberalesso, Tiago PY - 2019/05/27 TI - Evaluation of rainfall in modules of green roofs with different substrates JF - Acta Brasiliensis; Vol 3 No 2 (2019): Acta BrasiliensisDO - 10.22571/2526-4338184 KW - N2 - The replacement of impermeable coverings by green cover has been presented as an environmentally adequate alternative for the reduction of surface runoff from rainwater. In this sense this research evaluated the efficiency of the substrate composition of green roofs in the reduction of rainfall. Rainfall and flow events were monitored, considering 40 experimental systems (10 treatments, with 4 replications each) of modular green roofs, composed of pure soil, pure commercial substrate and by the combination of different substrates: carbonized rice husks, in natura rice husks and soil. There was no statistically significant difference in the mean retention rate among the evaluated treatments. Nevertheless, it was verified that all treatments tested presented a mean retention rate of the rainfall of 74%, which demonstrates the potential of using residues such as rice husks in the composition of substrates for green roofs, since its cost is lower than the cost of commercial substrates, due to its properties such as lightness, porosity and good drainage, besides being an environmentally adequate alternative for the destination of this environmental liability. UR - http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/184