ABSTRACT
The design of road curb height and distance are important techniques to effect the urban flooding. This paper reviews a number of researches on pavement runoff. A 2D hydrodynamic model is developed based on shallow water equations, which allows an integral simulation of pavement surface runoff under different curb height, distance and rainfall intensity. The equations are discretized using the finite volume method on unstructured grids. Numerical results show that, accurate curb distance and height is more effective in decreasing runoff volume and the pressure of rainwater drainage network during heavy rainfall event, particularly the water depth and flooded area near the curb. The performance of curbs inlets on pavement runoff is affected by rainfall intensity, curb distance, curb height and the location of the road. Additional, the model significantly appropriate to simulate the water depth, the inundation area and describe the flow field on the pavement. It can be demonstrated that the road with curb opening fully reflects the ideas of low impact development, which is essential for transport management.
