Field Evaluation of Hydrologic and Water Quality Benefits of Perforated Paving Block Structure (P2BS)

Abstract

This paper discusses the use of perforated paving block structure (P2BS) as a pavement structure on the parking lot. Model of P2BS was developed in the field to analyze its capacity in reducing runoff and improving surface runoff quality. The depth and intensity of the rainfall is regulated with a rainfall simulator. The rate of native soil infiltration (natural) was tested with ring infiltrometer. The model's ability to reduce peak discharge and runoff volume, delay time, as well as improve quality of surface runoff was observed. The results show that proposed P2BS are able to significantly reduce runoff volume and peak discharge, delay start runoff and peak discharge time. It is also able to remove pollutants, especially TSS.