Modeling the Effects of Low Impact Development on
Runoff and Pollutant Loads from an Apartment
Complex |
Ji-Hong Jeon1, Kyoung Jae Lim2, Donghyuk Choi1, and Tae-Dong Kim1† |
1Department of Environmental Engineering, Andong National University, Andong 760-749, Korea 2Department of Regional Infrastructure Engineering, Kangwon National University, Chuncheon 200-701, Korea |
Corresponding Author:
Tae-Dong Kim ,Tel: +82-54-820-5895, Fax: +82-54-823-1630, Email: tdkim@andong.ac.kr |
Received: June 16, 2010; Accepted: August 23, 2010. |
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ABSTRACT |
The effects of low impact development (LID) techniques, such as green roofs and porous pavements, on the runoff and pollutant
load from an apartment complex were simulated using the Site Evaluation Tool (SET). The study site was the Olympic Village, a preexisting
apartment complex in Seoul, South Korea, which has a high percentage of impervious surfaces (approximately 72% of the total
area). Using the SET, the effects of replacing parking lots, sidewalks and driveways (37.5% of the total area) having porous pavements
and rooftops (14.5% of the total area) with green roofs were simulated. The simulation results indicated that LID techniques reduced
the surface runoff, and peak flow and pollutant load, and increased the evapotranspiration and soil infiltration of precipitation. Per unit
area, the green roofs were better than the porous pavements at reducing the surface runoff and pollutant loads, while the porous pavements
were better than green roofs at enhancing the infiltration to soil. This study showed that LID methods can be useful for urban
stormwater management and that the SET is a useful tool for evaluating the effects of LID on urban hydrology and pollutant loads from
various land covers. |
Keywords:
Low impact development | Site Evaluation Tool | Storm water management | Urban hydrology |
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