Abstract:In order to improve the application effects of permeable pavement in weakly permeable soil areas, the conventional permeable pavement soil base layer has been improved by increasing the permeation tube. The removal efficiency of COD, TN, TP, Cu2+ and other pollutants from typical rainwater runoff in weak permeable soil area by improved permeable pavement and its different structural layers were analyzed through artificial rainfall test, and it is compared with conventional pervious paving device under the same conditions. The results show that the removal effect of improved permeable pavement on four pollutants is obviously enhanced. Under the condition of 60 min rainfall duration, the removal capacity of improved permeable pavement for four pollutants increased by 11.87%, 27.61%, 9.17% and 29.02%, respectively, when rainfall recurrence period was 2 years. The shorter the recurrence period of rainfall, the better removal effects of COD, TN, TP and Cu2+ by permeable pavement.