본 연구에서는 효율적인 와류형 미필터 비점오염저감장치를 개발하고 검증하였다. 저감장치의 검증을 위해 오염물질을 이용하여 총 12개 형태(3개 강우강도×2개 상태×2개 단계)의 실험을 진행하였다. 실험은 (1) 모의유입량 산정(강우강도 2.5 mm/hr: 0.00152 m3/s, 강우강도 3.395mm/hr: 0.00206 m3/s, 강우강도 6.870 mm/hr: 0.00326 m3/s); (2) 오염물질 채취 및 투입(4개 입경 사이즈의 25%씩 혼합); (3) 오염물질 제거효율 측정으로 구성하였고, 장치 초기상태와 운영상태로 구분하여 수행되었다. 강우강도별로 분석한 결과, 모든 강우강도에서 초기상태 및 운영상태 모두 오염물질 농도가 감소하였으며, 유입수 대비 유출수 오염물질 제거효율에서도 오염물질을 환경부 기준 80% 이상 제거하는 결과를 보였다. 특히 제거효율이 시간이 지남에 따라 서서히 증가하여 약 90%를 상회하였으며, 초기상태보다 운영상태에서 오염물질 제거효율이 더 높은 것으로 나타났다. 따라서 본 연구에서 개발한 와류형 미필터 비점오염저감장치로 효율적인 비점오염원을 제거할 수 있음을 증명하였다.

The objective of this study was to develop and verify an effective vortex typed nonfilter nonpoint source pollution reduction device. To verify this pollution reduction device, a total of twelves scenarios (three rainfall intensities×two states×two steps) of experiments were conducted using pollutants. First, simulated inflow (rainfall intensity 2.5 mm/hr: 0.00152 m3/s, rainfall intensity 3.395 mm/hr: 0.00206 m3/s, rainfall intensity 6.870 mm/hr: 0.00326 m3/s) was calculated. Second, pollutants (mixture of 25% of four particle sizes) were selected and injected. Third, pollutant removal efficiencies of this device at its initial state and operating states were measured. As a result of analysis based on rainfall intensity, the concentration of pollutants was decreased by the device at initial and operating states at all rainfall intensities. Its pollutant removal efficiency was more than 80%, the standard set by the Ministry of Environment. Its pollutant removal efficiency was gradually increased over time, reaching approximately 90%. Its pollutant removal efficiency was higher in its operating state than that in its initial state. Therefore, nonpoint source pollutants can be effectively removed by this vortex typed nonpoint source pollution reduction device developed in this study.

Abstract
 요 지
 1. 서 론
 2. 비점오염저감장치의 개발
  2.1 비점오염저감장치 기준
  2.2 미필터 와류형 비점오염저감장치
 3. 실험을 통한 비점오염저감장치 검증
  3.1 실험개요
  3.2 검증을 위한 실험결과 분석
  3.3 실험결과 분석에 대한 고찰
 4. 요약 및 결론
 References

• Jang Suk Hwan(Department of Civil Engineering, Daejin University) | 장석환
• Lee Jae-Kyoung(Innovation Center for Engineering Education, Daejin University) | 이재경 Corresponding Author
• Lee Hae-Kwang(Department of Civil Engineering, Daejin University) | 이해광
• Hwang Sung-Gyu(Innoblue industry) | 황성규