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http://dx.doi.org/10.14249/eia.2021.30.3.141

CFD Simulation of Changesin NOX Distribution according to an Urban Renewal Project  

Kim, Ji-Hyun (Department of Environmental and Biomedical Convergence, Kangwon National University)
Kim, Yeon-Uk (Department of Environmental and Biomedical Convergence, Kangwon National University)
Do, Heon-Seok (Department of Environmental Science, Kangwon National University)
Kwak, Kyung-Hwan (School of Natural Resources and Environmental Science, Kangwon National University)
Publication Information
Journal of Environmental Impact Assessment / v.30, no.3, 2021 , pp. 141-154 More about this Journal
Abstract
In this study, the effect of the restoration of Yaksa stream and the construction of an apartment complex by the urban renewal project in the Yaksa district of Chuncheon on air quality in the surrounding area was evaluated using computational fluid dynamics (CFD) model simulations. In orderto compare the impact of the project, wind and pollutant concentration fields were simulated using topographic data in 2011 and 2017, which stand for the periods before and after the urban renewal project, respectively. In the numerical experiments, the scenarios were set to analyze the effect of the construction of the apartment complex and the effect of stream restoration. Wind direction and wind speed data obtained from the Chuncheon Automated Synoptic Observing System (ASOS) were used as the inflow boundary conditions, and the simulation results were weighted according to the frequencies of the eight-directional inflow wind directions. The changes in wind speed and NOX concentration distribution according to the changes in building and terrain between scenarios were compared. As a result, the concentration of NOX emitted from the surrounding roads increased by the construction of the apartment complex, and the magnitude of the increase was reduced as the result of including the effect of stream restoration. The concentration of NOX decreased around the restored stream, while the concentration increased significantly around the constructed apartment complex. The increase in the concentration of NOX around the apartment complex was more pronounced in the place located in the rear of the wind direction to the apartment complex, and the effect remains up to the height of the building. In conclusion, it was confirmed that the relative arrangement of apartment complex construction and stream restoration in relation to the main wind direction of the target area was one of the major factors in determining the surrounding air quality.
Keywords
Urban renewal project; Apartment construction; Stream restoration; Nitrogen oxides; CFD model;
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Times Cited By KSCI : 2  (Citation Analysis)
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