Predicting Performance for Constructed Storm-Water Wetlands
Publication: Journal of Hydraulic Engineering
Volume 139, Issue 11
Abstract
Water quality treatment via constructed storm-water wetlands (CSWs) is intimately linked to system hydraulics. Previous works have attempted to define the relationship between performance and wetland design variables (e.g., length, width, area). However, these works suffer from two major flaws: small sample size and/or nonrandom samples. The authors provide a framework herein to overcome these flaws. The goals of this research were to develop a methodology for creating randomly generated wetland designs and to use these designs to develop a set of equations for predicting peak flow reduction. Two thousand randomly generated wetland designs were generated using a five-tiered approach. Channel length and roughness were highly correlated with peak flow reduction and explained 83% of the total variability within the data set. Because of the large number of randomly generated designs, the regression equations presented herein prevent bias toward nonrandom designs. These equations represent the most general predictive performance equations developed to date and can be used to aid in CSW design.
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Acknowledgments
The authors would like to thank the US EPA, Pennsylvania Department of Environmental Protection, and the Villanova Urban Stormwater Partnership for partial support.
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© 2013 American Society of Civil Engineers.
History
Received: Jul 17, 2012
Accepted: Apr 12, 2013
Published online: Apr 13, 2013
Discussion open until: Sep 13, 2013
Published in print: Nov 1, 2013
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