A Permeable Porous Asphalt Curb – Inlet System for Improving Urban Road Surface Drainage Efficiency

Abstract

Rapid urbanization increases impervious surfaces and places growing pressure on urban drainage systems, making improved roadway stormwater collection efficiency essential. This paper investigates the design and arrangement of pervious porous asphalt concrete curb elements combined with stormwater inlet grates to enhance the collection and conveyance of roadway runoff in urban areas. Based on an analysis of surface runoff mechanisms and roadway geometric characteristics, an integrated solution employing porous asphalt concrete curbs and inlet grates is proposed. The results of hydraulic analysis and calculations, combined with SEEP/W numerical modeling of infiltration through the porous curb, indicate that the proposed solution has strong potential to enhance stormwater collection efficiency, reduce the risk of localized surface ponding, and alleviate the load on urban drainage systems, particularly during high-intensity rainfall events.