A case study of flow characteristics of permeable pavements by time and space model

초록

Permeable pavement is widely used to improve the water circulation system in urban areas. The advantages of using permeable pavement are the storage of rainwater, reduction of runoff, out-flow delay, and reduction of peak discharge. The outflow characteristics of different types of permeable pavements are explained by runoff coefficients, which define the relationship between runoff and infiltration rate. This study presents a model of cumulative outflow with respect to time explaining the discharge characteristics of permeable pavement. The model can be used to explain storage capacity, delay time, peak discharge rate, and outflow of pavement structure by accumulating total discharge at the surface and subsurface relative to time. For further verification of the model, a rainfall simulation experiment was performed in the field. Based on the data analysis through the developed model, the advantages of different permeable pavements can be characterized.

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