Abstract
In several cities, permeable brick pavement (PBP) plays a key role in stormwater management. Although various hydrological models can be used to analyze the mitigation efficiency of PBP on rainfall runoff, the majority do not consider the effect of multi-layered pavement on infiltration in urban areas. Therefore, we developed a coupled model to evaluate the potential effect of PBP in reducing stormwater runoff at a watershed scale. Specifically, we compared the hydrological responses (outflow and overflow) of three different PBP scenarios. The potential effects of PBP on peak flow (PF), total volume (TV), and overflow volume (OV) were investigated for 20 design rainstorms with different return periods and durations. Our results indicate that an increase in PBP ratio reduces both PF (4.2–13.5%) and TV (4.2–10.5%) at the outfall as well as the OV (15.4–30.6%) across networks. The mitigation effect of PBP on OV is linearly correlated to storm return period and duration, but the effects on PF and TV are inversely correlated to storm duration. These results provide insight on the effects of infiltration-based infrastructure on urban flooding.
Highlights
Extensive impervious surfaces associated with rapid urbanization has greatly exacerbated the threat of flooding for several cities around the world [1]
A study has reported that the implementation of Permeable pavement (PP) and other source-control solutions at small urban catchment scales can reduce the peak flows and the runoff volume by 14–45% and 9–23%, respectively [9]
Ren et al reported that stable infiltration rates (SIR)
Summary
Extensive impervious surfaces associated with rapid urbanization has greatly exacerbated the threat of flooding for several cities around the world [1] In recent decades, both urban flooding and waterlogging have become common occurrences along the southeastern coast of China, along watersheds due to the large volume of rainstorm runoff [2]. Both urban flooding and waterlogging have become common occurrences along the southeastern coast of China, along watersheds due to the large volume of rainstorm runoff [2] Within this context, the concept of a Sponge City (SPC) was proposed to support natural hydrological processes by reducing rainfall runoff through infiltration, detention, and retention [3]. The effect of permeable brick pavement (PBP) on reducing rainfall runoff under various conditions associated with typical watersheds has received increased research interest [6]
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