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Abstract for presentation (Poster or Podium) with a Paper in the Conference Proceedings

Sustainable Transportation & Urban Development

Realtime Rainfall and Infiltration Rates in a Pervious Concrete Test Bed

Sunday, June 16, 2024
3:00 PM - 4:15 PM ET
Room: Galleria
Abstract:

This research examined the infiltration rates on the surface of a pervious concrete (PC) test slab in Beaumont Texas and also the infiltration rate into the soil below the associated underground aggregate storage bed. The site has very slow infiltrating clayey soils and the trials are intended to provide information on the efficacy of using green stormwater infrastructure (GSI) in similar areas. The slab and its associated storage bed measured 10 feet by 20 feet, with a total depth of 22 inches. An analysis of the void ratio of the aggregate provided a relationship between the water depth in the aggregate bed with the soil infiltration rate. Furthermore, the relationship between the water depth in the bed was studied for a combined PC and raingarden (RG) system. The surface PC infiltration rate measurement was carried out using a single ring infiltrometer and for the newly placed slab was on average 1450 in/hr. The soil infiltration rate was measured with a real-time water level sensor with an associated rain gauge. The soil infiltration rate was estimated to be 0.012 in/hr. With the combined PC/RG system the rate of the draindown of the water level in the pervious concrete storage bed at times doubled for larger storms, indicating that the raingarden may have aided in its effectiveness, possibly by evaporation or other processes.

Learning Objectives:

Attendees can expect to learn the following from this session:
  • Participants will be able to list some of the intricacies involved in placing a pervious concrete system.
  • Will be able to read realtime water sensor data.
  • Will be able to perform a simple mass balance on a slow draining storage bed system.