Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Characterization of Stormwater Pollutants and Estimation of Unit Loads for Road and Parking Lot in Gyeongan Stream Watershed

경안천지역의 도로 및 주차장에 대한 강우유출수의 특성분석과 원단위 산정

  • Go, Sung-Hun (Department of Environmental Engineering & Biotechnology, Myongji University) ;
  • Memon, Sheeraz Amed (Department of Environmental Engineering & Biotechnology, Myongji University) ;
  • Lee, Chang-Hee (Department of Environmental Engineering & Biotechnology, Myongji University)
  • Received : 2009.04.09
  • Accepted : 2009.06.30
  • Published : 2009.09.30
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Abstract

Unit load approach has been used to estimate the non-point pollutant load in Total Water Pollution Load Management System (TWPLMS). In this study, locally applicable unit loads for road and parking lot were developed based on the measurements of 9 rainfall events from 2007 to 2008 in Yongin city of Gyeongan stream watershed. Observations showed that stormwater runoff began at low precipitation (>1 mm) and peak pollutant concentration occurred at the beginning of the runoff because of impervious nature of the sites. Averaged event mean concentrations (EMCs) of road (parking lot) were estimated as COD 105.36(62.69) mg/L, BOD 15.94(13.20) mg/L, TSS 183.45(66.52) mg/L, T-N 4.63(3.28) mg/L, T-P 0.45(0.39) mg/L. Higher EMCs at the road than parking lot may reflect heavier traffic. Unit loads Estimated from the EMCs and 10 year average rainfall data were COD $331.17kg/km^2{\cdot}day$, BOD $50.20kg/km^2{\cdot}day$, TSS $580.13kg/km^2{\cdot}day$, T-N $14.68kg/km^2{\cdot}day$, T-P $1.43kg/km^2{\cdot}day$ in the road and COD $186.59kg/km^2{\cdot}day$, BOD $39.22kg/km^2{\cdot}day$, TSS $199.15kg/km^2{\cdot}day$, T-N $9.70kg/km^2{\cdot}day$, T-P $1.16kg/km^2{\cdot}day$ in the parking lot. The estimated unit loads are not so comparable to the ones listed in TWPLMS technical guideline and published data that locally developed unit loads should be used to estimate non-point pollutant loads.

Keywords

Acknowledgement

Supported by : 경기지역환경기술개발센터

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