Title: Quantifying the Behavior of Porous Asphalt Overlays with Respect to Drainage Hydraulics and Runoff Water Quality
Abstract: Research Article| February 01, 2012 Quantifying the Behavior of Porous Asphalt Overlays with Respect to Drainage Hydraulics and Runoff Water Quality J. BRANDON KLENZENDORF; J. BRANDON KLENZENDORF 1 Geosyntec Consultants, 3600 Bee Caves Road, Suite 101, Austin, TX 78746 1Corresponding author email: [email protected]. Search for other works by this author on: GSW Google Scholar BRADLEY J ECK; BRADLEY J ECK Center for Research in Water Resources, PRC #119 (R8000), University of Texas, Austin, TX 78712 Search for other works by this author on: GSW Google Scholar RANDALL J CHARBENEAU; RANDALL J CHARBENEAU Department of Civil, Architectural and Environmental Engineering, 1 University Station C1700, University of Texas, Austin, TX 78712 Search for other works by this author on: GSW Google Scholar MICHAEL E BARRETT MICHAEL E BARRETT Center for Research in Water Resources, PRC #119 (R8000), University of Texas, Austin, TX 78712 Search for other works by this author on: GSW Google Scholar Environmental & Engineering Geoscience (2012) 18 (1): 99–111. https://doi.org/10.2113/gseegeosci.18.1.99 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. BRANDON KLENZENDORF, BRADLEY J ECK, RANDALL J CHARBENEAU, MICHAEL E BARRETT; Quantifying the Behavior of Porous Asphalt Overlays with Respect to Drainage Hydraulics and Runoff Water Quality. Environmental & Engineering Geoscience 2012;; 18 (1): 99–111. doi: https://doi.org/10.2113/gseegeosci.18.1.99 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyEnvironmental & Engineering Geoscience Search Advanced Search Abstract Porous pavements are gaining popularity in urban settings on highways based on their water quality benefits, noise reduction characteristics, and the reduced splash and spray they yield in wet weather. Over time, porous pavements can become clogged with sediment, resulting in a decrease in porosity and hydraulic conductivity as well as a loss of drainage benefits. This article provides an overview of water quality benefits and methodology for measuring hydraulic conductivity specifically for permeable friction course (PFC). PFC is a layer of porous asphalt ranging from 2.5 to 5.0 cm thick placed as an overlay on conventional impervious roadways. Research studies show a reduction in total suspended solids and total metals in runoff from PFC surfaces compared to runoff from conventional pavements. Monitoring results were mixed for nutrient removal from PFC. Porosity and hydraulic conductivity data collected over multiple years from different roadways in Austin, TX, are presented. The porosity values of PFC specimens ranged from 0.12 to 0.23. The non-linear flow relationship observed during hydraulic testing requires analysis of the Forchheimer equation, as opposed to the typical Darcy's law. Hydraulic conductivity values ranged from 0.02 to 3.0 cm/s with significant variability. Furthermore, hydraulic modeling of PFC is useful for design purposes and determines when the layer becomes saturated and surface runoff is expected. Flow through PFC is modeled as an unconfined aquifer with an underlying sloping impervious boundary. The use of porous pavements in an urban environment not only improves driving conditions but also helps reduce the adverse impacts of urbanization on surface water and groundwater quality. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2012
Publication Date: 2012-02-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 7
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