Evaluation of Groundwater Recharge Functions of Porous Pavements Using a Tank Model
Satoshi NAKAMURA, Kazuaki HIOKI, Kazuo AOKI and Takao YANO
Abstract:In this study, an attempt was made to develop tank and modified tank models of surface runoff and groundwater recharge of porous pavements based on the results of model tests conducted to evaluate the stormwater infiltration and storage functions of porous pavements. As a result, it was revealed that the tank and modified tank models were fully applicable to the evaluation of groundwater recharge functions of small-scale artificial structures like porous pavements and that the amounts of surface runoff and groundwater recharge by porous pavements could be accurately reproduced by the tank or modified tank model by using different parameters in areas at rainfall intensities above and below 70.0 mm/hr where stormwater penetration behavior in porous pavements varied. In order to evaluate the stormwater storage capacity of porous pavements, numerical tests were conducted using the modified tank model. As a result, it was verified that porous pavements had little stormwater storage capacity. Key Words:Porous pavements, Surface runoff, Groundwater recharge, Tank model, Modified tank model