Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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The Improvement on the Empirical Formula of Stormwater Captured Ratio for Water Quality Volume Based Non-Point Pollutants Water Quality Control Basins

WQV 기반 비점오염저감시설의 강우유출수 처리비 경험공식의 개선

  • Choi, Daegyu (Department of Environmental Engineering, Pukyong National University) ;
  • Park, Moo Jong (Department of Civil Engineering, Hanseo University) ;
  • Park, Bae Kyung (Water Pollution Load Management Research Division, National Institute Environment Research) ;
  • Kim, Sangdan (Department of Environmental Engineering, Pukyong National University)
  • Received : 2013.11.21
  • Accepted : 2014.01.29
  • Published : 2014.01.30
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Abstract

According to the technical guideline of water pollutant load management, the rainfall captured ratio which can be estimated by the empirical formula is an important element to estimate reduction loads of non-point pollutants water quality control basin. In this study, the rainfall captured ratio is altered to stormwater captured ratio considering its meaning in the technical guideline of water pollutant load management, and the new empircal formula of stormwater captured ratio is suggested. In order to do this, we calculate stormwater captured ratio by using the hourly rainfall data of seven urban weather stations (Busan, Daegu, Daejeon, Gangreung, Seoul, Gwangju, and Jeju) for 43 years. The regression coefficients of the existed empirical formula cannot reflect the catchment properties at all, because they are fixed values regardless of regions. However the empirical formula of stormwater captured ratio has flexible regression coefficients by runoff coefficient(C), so it is allowed to consider the characteristics of runoff in catchment. It is expected that reduction loads of storage based water quality control basin can be more reasonably estimated than before.

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References

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