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http://dx.doi.org/10.15681/KSWE.2021.37.2.103

Development and Application of ROADMOD for Analysis of Non-point Source Pollutions from Road: Analysis of Removal Efficiency of Sediment in Road by Sweeping  

Kang, Heeman (Korea Expressway Corporation Research Institute)
Jeon, Ji-Hong (Department of Environmental Engineering, Andong National University)
Publication Information
Journal of Korean Society on Water Environment / v.37, no.2, 2021 , pp. 103-113 More about this Journal
Abstract
In this study, an Excel-based model (ROADMOD) was developed to estimate pollutant loading from the road and evaluate BMPs. ROADMOD employs the Chezy-Manning equation and empirical expression for estimating surface runoff, and power function for pollutant buildup, and exponential function for pollutant washoff in SWMM. The results of model calibration for buildup and washoff using observed data revealed a good match between the simulation results and the observed data. The long-term surface runoff and sediment simulated by ROADMOD demonstrated a good match with those by SWMM with 2 ~ 14% of relative error. The shorter sweeping interval (within 8 days) remarkably decreased sediment loads from the road. It was found that the effect of reducing sediment loads from the road was greatly affected not only by the sweeping interval but also by sweeping on the day before a rainfall event. The 48% of removal efficiency of sediment loads from the road was achieved with 26 times of road sweeping per year when sweeping was performed on the day before the rainfall event. A 4-day sweeping interval showed similar removal efficiency (48%) with 96 times of sweeping per year. It is considered that the road sweeping on the day before a rainfall event could maximize the effect of reducing the non-point source pollution from the road with minimization of the number of road sweeping. So, the road sweeping on the day before a rainfall event can be considered as one of the useful and best management practices (BMPs) on road.
Keywords
Non-point source pollution; ROADMOD; Road sweeping; Sediment load;
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