Abstract ▼ AI-Helper

Untreated stormwater discharge has been found to have major impacts on urban watercourses. Despite of many stormwater BMPs developed, there is limited information of the efficiency for non-point pollutants reduction in Korea urban drainage systems. The purpose of this study is to evaluate and monito...

Untreated stormwater discharge has been found to have major impacts on urban watercourses. Despite of many stormwater BMPs developed, there is limited information of the efficiency for non-point pollutants reduction in Korea urban drainage systems. The purpose of this study is to evaluate and monitor the trend of non-point pollutants runoff and BMPs'''''''' efficiency. Young-In Samgyeri and Kimlyangzangdong, neighboring Kyungan river , were chosen as a research site. At the Young-in Samgyri site, vortex BMP was installed end of stormwater drainage system covering 2.74 ha. And at the Yong-in Kimlyangzangdong, vortex+filtration BMP was installed end of combined drainage system covering 3.5 ha. Vortex system is composed of vortex and screen. So it''''''''s main removal process is gravitational settling. As a result of the monitoring, vortex system had good removal efficiency on the TSS and Oil&Grease. But on the dissolved pollutants, DOC and BOD, vortex system had poor efficiency. Vortex+filtration system is composed of vortex and perlite filter. So it''''''''s main removal process is gravitational settling and adsorption. As a result of the monitoring, vortex+filtration system had good removal efficiency on the BOD and heavy metals. Vortex system was easy to maintain the system because of simple structure. Once a year, suction of sump sludge was needed. Vortex+filtration system needed careful maintenance because it had large size tank and in this tank, waste water can go into decay.