Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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LIDMOD Development for Evaluating Low Impact Development and Its Applicability to Total Maximum Daily Loads

지속가능한 도시개발을 위한 LID평가모델(LIDMOD)개발과 수질오염총량제에 대한 적용성 평가

  • Jeon, Ji-Hong (Department of Environmental Engineering, Andong National University) ;
  • Choi, Dong Hyuk (Department of Environmental Engineering, Andong National University) ;
  • Kim, Tae Dong (Department of Environmental Engineering, Andong National University)
  • Received : 2008.08.21
  • Accepted : 2008.10.29
  • Published : 2009.01.30
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Abstract

Low impact development (LID) technique is relatively new concept to reduce surface runoff and pollutant loading from land cover by attempting to match predevelopment condition with various integrated management practices (IMPs). In this study, computational model for designing and evaluating LID, named LIDMOD, was developed based on SCS-CN method and applied at Andong bus terminal to evaluate LID applicapability and design retention/detention area for volume or peak flow control. LIDMOD simulated with 21 years simulation period that yearly surface runoff by post-development without LID was significantly higher than that with LID showing about 2.8 times and LID could reduce efficiently yearly surface runoff with 75% reduction of increased runoff by conventional post development. LIDMOD designed detention area for volume/peak flow control with 20.2% of total area by hybrid design. LID can also efficiently reduce pollutant load from land cover. Pollutant loads from post-development without LID was much higher than those from pre-development with showing 37 times for BOD, 2 times for TN, and 9 times for TP. Pollutant loads from post-development with LID represented about 57% of those without LID. Increasing groundwater recharge reducing cooling and heating fee, creating green refuge at building area can be considered as additional benefits of LID. At the point of reducing runoff and pollutant load, LID might be important technique for Korean TMDL and LIDMOD can be useful tool to calculate unit load for the case of LID application.

Keywords

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