| Title |
Cost-Effectiveness Analysis of Low-Impact Development Facilities to Improve Hydrologic Cycle and Water Quality in Urban Watershed |
| Authors |
최정현 ( Jeonghyeon Choi ) ; 김경민 ( Kyungmin Kim ) ; 심인경 ( Inkyeong Sim ) ; 이옥정 ( Okjeong Lee ) ; 김상단 ( Sangdan Kim ) |
| DOI |
https://doi.org/10.15681/KSWE.2020.36.3.206 |
| Keywords |
Bio-retention cells; Combined sewer overflows; EPA-SWMM; Infiltration trenches; Permeable pavement systems; Water cycle |
| Abstract |
As urbanization and impermeable areas have increased, stormwater and non-point pollutants entering the stream have increased. Additionally, in the case of the old town comprising a combined sewer pipe system, there is a problem of stream water pollution caused by the combined sewer overflow. To resolve this problem, many cities globally are pursuing an environmentally friendly low impact development strategy that can infiltrate, evaporate, and store rainwater. This study analyzed the expected effects and efficiency when the LID facility was installed as a measure to improve hydrologic cycle and water quality in the Oncheon stream in Busan. The EPA-SWMM, previously calibrated for hydrological and water quality parameters, was used, and standard parameters of the LID facilities supported by the EPA-SWMM were set. Benchmarking the green infrastructure plan in New York City, USA, has created various installation scenarios for the LID facilities in the Oncheon stream drainage area. The installation and maintenance cost of the LID facility for scenarios were estimated, and the effect of each LID facility was analyzed through a long-term EPA-SWMM simulation. Among the applied LID facilities, the infiltration trench showed the best effect, and the bio-retention cell and permeable pavement system followed. Conversely, in terms of cost-efficiency, the permeable pavement systems showed the best efficiency, followed by the infiltration trenches and bio-retention cells. |