Long-Term Monitoring of Infiltration Trench for Nonpoint Source Pollution Control

Abstract

Nonpoint source pollution management initiated by the Ministry of Environment (MOE) in Korea resulted to the construction of 25 pilot facilities termed Best Management Practices (BMPs) until 2005. The national nonpoint sources control projects were employed to fulfill the Total Maximum Daily Load programs. The long-term monitoring being conducted at the sites which began in 2006 is providing detailed insight into the performance of the BMPs. The experience and performance data will be used to better understand and implement similar structural BMPs in the future as well as to assist the MOE in developing the design and maintenance guidelines of BMPs. This study presents the results gathered from the monitoring field tests and experiments over 22 rainfall events between the June 2006 and September 2008 period investigating the pollutant removal efficiency of the infiltration trench BMP that is one of the 25 pilot projects of the MOE. In addition, it includes the development of simple linear regression models to estimate constituent event mean concentration. The results reveal high treatment efficiencies for total suspended solids (89%); biochemical oxygen demand, chemical oxygen demand, and dissolved organic carbon (89-93%); oil and grease (100%); cadmium, lead, and zinc (89-93%); total nitrogen (84%); and total phosphorus (82%). The monitoring data and results will represent a step forward to a better prediction of impacts in the environment and to the national development of BMPs for sustainable watershed management in the country.

Analysis of the influence of rainfall variables on urban effluents concentrations and fluxes in wet weather

“…This is consistent with other studies, including Brezonik and Stadelmann (2002) who found contaminant fluxes to be positively correlated with TR and RI, but negatively correlated with DAT. Findings by Maniquiz et al (2010) from Yongin City, Korea, are consistent with these results while those by Wang et al (2013) show an opposite trend. In contrast to EMC values, conventional rainfall parameters TR and VD should be good predictors of EF values in a combined system, while for the storm sewer system, VD is the dominant variable (Table 7).…”

“…Aside from the October 6 event, which was preceded by a 14-days stretch of dry weather at both sites, the durations of dry periods preceding all the other events falls are within the summer average, which is generally shorter than a week for the region and period of interest. This may serve to restrict the accumulation of pollutants on developed surfaces, thus limiting pollutant remobilization by runoff (Maniquiz et al, 2010). CSO: combined sewer overflow; CV: coefficient of variation; RD: rainfall duration; TR: total rainfall; RI: rainfall intensity in 5 min; VD: volume discharged; DAT: dry antecedent time.…”

“…Results in Fig. 2 are likely due to the fact that EF values depend on EMCs, runoff volume and catchment surface area, all factors which are strongly dependent on rainfall (Maniquiz et al, 2010).…”

Redox Dynamics and Oxygen Reduction Rates of Infiltrating Urban Stormwater beneath Low Impact Development (LID)

“…Urbanization has adversely affected the quantity and quality of urban water resources [1,2] because of increased impervious surfaces, compaction of soils, and modifications to vegetation [3,4], which has reduced infiltration rates and increased stormwater runoff [5]. Impervious surfaces like pavement, rooftops, and parking lots increase stormwater runoff volume and contaminant loads in stormwater.…”

Lifecycle cost assessment of best management practices for diffuse pollution control in Han River Basin

“…The experience and performance data collected will be used to better understand and implement similar BMPs in the future as well as to assist the MOE in developing and improving the design and maintenance guidelines of BMPs (Maniquiz et al, 2010).…”