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http://dx.doi.org/10.17663/JWR.2016.18.4.481

Transport of nonpoint source pollutants and stormwater runoff in a hybrid rain garden system  

Flores, Precious Eureka D. (Department of Civil and Environmental Engineering, Kongju National University)
Maniquiz-Redillas, Marla C. (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.18, no.4, 2016 , pp. 481-487 More about this Journal
Abstract
In this research, a pilot scale hybrid rain garden system was developed in order to investigate the efficiency in the different components of the hybrid rain garden system and at the same time evaluate the initial efficiency of the system in treating urban stormwater runoff prior to its actual use in the field. Experimental runs were conducted using synthetic runoff having target concentrations similar to that of the typical runoff characteristics found in different countries and in Korea. With the employment of the hybrid rain garden system, hydrologic improvement was observed as the system demonstrates an approximately 95% reduction in the influent runoff volume with 80% retained in the system, and 15% recharged to groundwater. The reduction was contributed by the retention capabilities of ST and infiltration capabilities in PB and IT. With the combined mechanisms such as filtration-infiltration, biological uptake from plants and soil and phytoremediation that are incorporated in PB and IT, the system effectively reduces the amount of pollutant concentration wherein the initial mean removal efficiency for TSS is 87%, while an approximate mean removal efficiency of 76%, 46% and 56% was observed in terms of organics, nutrients and heavy metal, respectively. With these findings, the research helps in the further improvement, innovation and optimization of rain garden systems and other facilities as well.
Keywords
low impact development; pollutants; rain garden; runoff;
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Times Cited By KSCI : 2  (Citation Analysis)
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