Abstract:In order to understand the control effect of low impact development(LID)measures on rainwater runoff in practical application, the permeable pavement and green land in the Tianhe Smart City of Guangzhou City are selected to carry out field monitoring. Twenty and eleven rainfall runoff data are separately selected to analyze runoff reduction in permeable pavement and green land, respectively, and two rainfall water quality data are selected to analyze pollution removal in permeable pavement and green land. It is showed that the runoff reduction rate of permeable pavement and green land is increased with the increase of antecedent dry period(ADP), while it decreases with the increase of rainfall duration, rainfall and maximum rainfall intensity. If the rainfall is small, the runoff reduction rate of green land is larger than that of permeable pavement, while the rainfall is large, the opposite is true. The ADP is the longer, the pollutants accumulated on the surface and washed into the rainwater runoff is the more, and the pollutant concentration of permeable pavement and green land rainwater runoff is the higher.