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http://dx.doi.org/10.17663/JWR.2017.19.3.271

Determination on the component arrangement of a hybrid rain garden system for effective stormwater runoff treatment  

Flores, Precious Eureka D. (Department of Civil and Environmental Engineering, Kongju National University)
Geronimo, Franz Kevin F. (Department of Civil and Environmental Engineering, Kongju National University)
Alihan, Jawara Christian P. (Department of Civil and Environmental Engineering, Kongju National University)
Kim, Lee-Hyung (Department of Civil and Environmental Engineering, Kongju National University)
Publication Information
Journal of Wetlands Research / v.19, no.3, 2017 , pp. 271-278 More about this Journal
Abstract
Low impact development (LID) technology has been recently applied for the treatment of nonpoint source pollutants. Rain garden is one of the widely used LIDs since it utilizes various mechanisms such as biological and physico-chemical treatment to reduce pollutants. However, problem such as clogging has been one of the issues encountered by the rain garden that do not undergo constant maintenance. Therefore, this research was conducted to develop and determine the component arrangement of a rain garden system for a more efficient volume and pollutant reduction. Two hybrid rain garden systems having different characteristics were developed and evaluated to determine the optimum design and arrangement of the system. The results showed that the components arranged in a series manner showed a volume reduction of 93% and a pollutant reduction efficiency of approximately 99%, 93% and 95% was observed for particulates, nutrients and heavy metals, respectively. While when the system is connected in a combined series-parallel, the volume and average pollutant reduction efficiency for the TSS, nutrients and heavy metals are 65%, 94%, 80% and 85%, respectively. Moreover, the component arrangement in the order of sedimentation tank, infiltration tank and plant bed exhibited a high pollutant reduction efficiency compared when the infiltration tank and plant bed were interchanged. The findings of this research will help in the further development and optimization of rain garden systems.
Keywords
hybrid system; low impact development; nonpoint source; rain garden; urban stormwater runoff;
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Times Cited By KSCI : 5  (Citation Analysis)
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