NUMERICAL ANALYSIS OF INFILTRATION INTO PERVIOUS CONCRETE-BASE SYSTEMS

Abstract

Decrease in pervious area due to urbanization and rainfall intensification because of climate
change prompted to reconsider our philosophy in stormwater management. One of the innovative approaches
for stormwater management is a concept called Low Impact Development (LID). Among other techniques of
LID, construction of pervious pavement can utilize vast paved surfaces, tradition ally impervious, allowing
stormwater to infiltrate through its surface. In this study, the hydrologic performance of a particular pervious
concrete system section was investigated using Finite Element Method (FEM) modelling. The influence of
initial saturation and rainfall intensity to produce run-off were examined to imply possible design
considerations. Further, rainfall data recorded from July 15, 2012 at Busan, South Korea were employed to
investigate the effects of evaporation and underdrain in the hydrologic capacity and behavior of the pervious
concrete system. The results and implications to hydrological design are discussed herein.