Comparing the long term clogging pattern of permeable pavements for stormwater treatment and reuse

Tota-Maharaj, Kiran; Monrose, John

Abstract

Permeable pavements are engineered to temporarily store water to reduce flooding during rainfall events. Permeable pavements are distinguished primarily based on their surface materials which can vary from concrete, asphalt, plastic or stones. This paper assessed the long term clogging pattern of four permeable pavement test rigs in the laboratory through the determination of hydraulic conductivity changes that result from the accelerated sediment loading of the test rigs. The rigs were of a similar structure except for the sub-base component which comprised of either basalt, limestone, recycled concrete aggregates (RCA) and cement-bounded expanded polystyrene (EPS) beads (C-EPSB). Semi-synthetic stormwater comprising or fine sediments (diameter < 600 µm) and pipe borne water was used as the clogging agent. A rainfall simulator was used to distribute the stormwater evenly over the test rigs. Over a 10-year accelerated period, results showed an exponential decay in hydraulic conductivities for each test rig. Hydraulic conductivities reduced by 31, 39, 41 and 37% for Rig 1, Rig 2, Rig 3 and Rig 4 respectively. The results also showed that between 2 to 4 years, all rigs experienced the highest reduction in hydraulic conductivities.

• Presentation Conference Type: Conference Paper (unpublished)
• Conference Name: 2nd Polish IWA Young Water Professionals Conference “Emerging Technologies in Water and Wastewater Sector”
• Start Date: Feb 12, 2020
• End Date: Feb 14, 2020
• Deposit Date: Feb 21, 2020
• Keywords: Clogging, Hydraulic conductivity, permeable pavement, sediment, stormwater
• Public URL: https://uwe-repository.worktribe.com/output/5465175