비점오염저감시설의 수질처리용량 결정 및 설계기법의 불확실성 정량화

Abstract

Ministry of environment has introduced Total Maximum Daily Load(TMDL) for systematic management of water pollution since 1998. Both non-point source management and point source are essential to perform TMDL. Especially, the interest in non-point source management has recently increased. Accordingly, the Ministry of Environment has published 'Manual for the installation, management and operation of non-point pollution reduction facilities' and this manual has been continuously updated for efficient design and maintenance of non-point pollution reduction facilities. Despite these efforts, it is difficult for non-point pollutant control facilities to be realized. In this study, among the management or design standards for Korea's non-point pollution reduction, two parts that need to be improved are proposed and each improvement methods are introduced. Firstly, method improving conventional design standard is presented. Namely, unlike conventional design standard, a systematic design method considering the hydrological and geographic characteristics is introduced. Secondly, each uncertainty included in the stormwater capture ratio estimation and in the stormwater load capture ratio estimation are presented. Furthermore the relative impact on the overall non-point pollutant reduction facilities design process is quantified.