The Runoff Control Experiments On Two Modified Permeable Pavement Systems

Due to the development of city, impermeable area proportion is reaching higher, which has a result that after heavy rainfall, the urban waterlogging is produced. Under the current, permeable pavement arises. It’s not only can improve the surface defects of the impermeable hardening, but also can maintain the city water cycle, such as reducing the flood peak and runoff, incresaing rainwater osmotic quantity, purify rain water pollutants, which have a positive significance for urban waterlogging and water treatment plants.(1) Experimental study on the hydrological features on the two innovative permeable pavement technology, and comparion with traditional permeable concrete road and ordinary road. The conventional permeable concrete pavement r has the same trend of the pervious concrete pavement with the permeation conduction row, and the latter has a longer time for the runoff about 30 min. In the analysis ov the maximum production flow, we find that, porous pavement with plastic mesh is about 0.85L/min,and the traditional permeable concret is 0.45L/min.The results show that the innovative permeable pavement technology can reach a certain rusult, such as it can ruduce the runoff and flood peak flow, and make a effect of time delay. the pervious concrete pavement with permeation conduction row make a better result.(2)Experimental study on the two kinds of innovative permeable pavement technology and ordinary road and traditional permeable concrete road for SS, COD, TN, TP, NO3-- N and NH4-N, Cu remover cutting effect, we find that the two kinds of innovativepermeable pavement technology to various typical pollutants has a certain effect on removed. In the vertical direction, the removal efficiency of pollutants in each layer for: permeable concrete pavement >on the base of the porous stable macadam> graded gravel layer.(3)In orde to the decontamination mechanism of innovative permeable pavement technology research, we make a experiment for adsorption of structural materials. The research has shown that the different structure material of COD adsorption difference is bigger, and adsorption effect of cement best, is aboat 80%, while the pollutants in the initial solution concentration of 20 mg/L. The different structural material of C u adsorption effect is good, which has an average of 95%. To the adsorption of TP, the four kind of structural material adsorption removal rate is above 56%. N itrogen adsorption removal of cement is the best on the nitrogen removal effect. And there is not a superimposition relationship between total nitrogen and ammonia nitrogen, nitrate nitrogen in removal rate.In a conclusion, the pervious concrete pavement with permeation conduction row has a decisive advantage in runoff reduction, the porous pavement with plastic mesh is a bit poor to the traditional permeable concrete, which have very good runoff reduction effect to ordinary road. The two kinds of innovative permeable pavement technology has a good effect in pollutant removal experiment.This study of the two innovative permeable pavement technology will have a great significance in the application and development.