关键词: 雨洪控制, 典型LID, 水文效应, 透水铺装, SWMM模型

Abstract: Rapid development of urbanization has aggravated the problem of urban waterlogging and water pollution. In the present study of a residential area in Jizhou District of Tianjin, a SWMM model is developed on the basis of its planning scheme and a physical experiment of permeable pavement, and the stormwater control effects of seven planning schemes for different rainfall events are simulated. We explore the feasibility of adopting a natural drainage system in replacement of a rainwater pipe network in a certain area, and examine the control of different schemes ? separate permeable pavement, depressed green, vegetative swale, bio-retention facility, and combined low impact development (LID) measures. The results indicate that it is feasible for the natural drainage system to complete the flow convergence through permeable pavement, etc. and these measures can achieve a better control effect. Combined LID measures can reduce total runoff, flood peak flow and water accumulation, and delay peak time, thereby producing a more effective stormwater control for the rainfalls with a short return period and short duration. Among all the measures examined, the scheme of combined LID measures is best in stormwater control, the combination of permeable pavement and bio-retention facility is best in reduction of peak flow, and vegetative swale has a poor stormwater control effect.

Key words: stormwater control, typical LID, hydrological effects, permeable pavement, SWMM model