• Title/Summary/Keyword: Wash-off rates of RDS

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A Study on Estimating Diffuse Pollution Loads Removal by Road Vacuum Cleaning (도로청소에 의한 비점오염부하 삭감량 산정방법 연구)

  • Lee, Taehwan;Cho, Hong-Lae;Jeong, Euisang;Koo, Bhon K.;Park, Baekyung;Kim, Yongseok
    • Journal of Korean Society on Water Environment
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    • v.33 no.2
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    • pp.123-129
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    • 2017
  • The purpose of this study is to identify potential methodologies to reasonably estimate the effectiveness of road vacuum cleaning in terms of pollution loads reduction. In this context, this study proposes two empirical equations to estimate the amount of diffuse pollution loads removed by road vacuum cleaning. The proposed equations estimate the removed amount of pollution loads respectively taking into consideration of: a) the distance of road vacuum cleaning; and b) the amount of road-deposited sediment(RDS). All of the parameters in these equations were evaluated based on results of field monitoring and laboratory analyses, except for the RDS generation rate. The results of this study suggest that pollutant removal efficiency is 46.3% for $BOD_5$ and 56.4% for TP; discharge ratios for particulate and dissolved $BOD_5$ are 35.0% and 21.2%, respectively; discharge ratios for particulate and dissolved TP are 35.0% and 19.4%, respectively. Average concentrations of pollutants in RDS are $BOD_5$ 977.3 mg/kg and TP 317.6 mg/kg. Some results of a case study imply that both equations can be potentially useful if the adopted parameters are reasonably evaluated. In particular, the RDS generation rate should be evaluated based on monitoring data collected from various road conditions.