Water Runoff Characteristics in Porous Block Pavements Using an Accelerated Pavement Tester
Publication: Journal of Hydrologic Engineering
Volume 19, Issue 9
Abstract
Permeable block pavements are designed to treat and delay the water flow in an urban environment. In order to measure the runoff characteristics of the permeable block pavement, a rainfall simulation test was conducted at the accelerated pavement testing facility. This paper focuses on determining the runoff characteristics in terms of the permeability coefficients of the block pavements under different rainfall conditions, such as rainfall intensity, quantity, and time intervals. In this study, four different pavement test sections were constructed and their runoff coefficient values were determined as follows: (1) 0.19–0.45 for the porous block-porous cement treated base (CTB) section, (2) 0.27–0.61 for the porous block-dense CTB section, (3) 0.50–0.78 for the dense block-porous CTB section, and (4) 0.77–0.85 for the dense block-dense CTB section. Particularly, when the rainfall intensity increased from 60 to on the porous block pavement, 5–45% additional surface runoff occurred. Further, 20% more surface runoff occurred in the saturated surface condition compared to the dry condition.
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Acknowledgments
This study was conducted through a research project titled “Environmentally friendly porous block pavement test bed and improvement idea derived services” funded by Seoul Metropolitan Government. Expressway and Transportation Research Institute of Korea Expressway Corporation supported the test equipment and test fields. Authors would like to express great appreciation to them.
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© 2014 American Society of Civil Engineers.
History
Received: Feb 14, 2012
Accepted: Dec 2, 2013
Published online: Dec 4, 2013
Published in print: Sep 1, 2014
Discussion open until: Nov 5, 2014
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