| Title |
Analysis of Non-point Pollution Source Removal Efficiencies according to Rainfall Characteristics in Low Impact Development Facilities with Vegetation |
| Authors |
구수환 ( Soo-hwan Ku ) ; 임지열 ( Jiyeol Im ) ; 어성욱 ( Seong-wook Oa ) ; 길경익 ( Kyungik Gil ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.3.247 |
| Keywords |
Best management practice (BMP); Grassed swale (GS); Low impact development (LID); Non-point pollution source (NPS); Vegetative filter strip (VFS) |
| Abstract |
This research was conducted to analyze removal efficiencies of non-point pollution source (NPS) in low impact development (LID) facilities with vegetation. In this research, removal efficiencies of NPS were calculated using rainfall monitoring data for 5 years in grassed swale (GS) and vegetative filter strip (VFS). TSS was greater than other pollutants, and it ranged 11.9 ~ 351.7 mg/L in GS and 12.8 ~ 350.7 mg/L in VFS. Outflow EMCs were reduced than inflow EMCs, overall removal efficiencies of NPS were 67 ~ 86% in GS and 63 ~ 91% in VFS. 50 % reduction efficiency of rainfall runoff was observed between inflow and outflow in each LID facility. TSS removal efficiency in GS and VFS was correlated with rainfall characteristics. The rainfall for TSS removal efficiency over 50% was determined about 31 mm, 34 mm and average rainfall intensity was 3.0 mm/hr, 3.9 mm/hr in GS and VFS.. Therefore, GS and VFS were regarded effective LID facilities as removal of pollutants and rainfall runoff. Also, this research result can be used as an important data for management of NPS. |