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KMID : 1024520170260040493
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Journal of the Environmental Sciences
2017 Volume.26 No. 4 p.493 ~ p.507
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Study on the Impacts of Lateral Boundary Conditions and Thermodynamics of Urban Park using Coupling System of WRF / ENVI-met
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Lee Tae-Jin
Yoo Jung-Woo
Lee Hwa-Woon
Won Hyo-Sung
Lee Soon-Hwan
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Abstract
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Since the late 20th century, the urbanization in Korea has been rapidly increasing, especially in major cities like Seoul, as a result of industrialization. One of the aspects of urbanization is coating the surfaces with impervious concrete or asphalt that water cannot penetrate. In addition, various urban, such as urban heat islands, which also have a great impact on the urban environment, occur within the cities. Therefore, the urban environment is gradually becoming hot and dry, and the need for more urban parks to compensate for these negative impacts is growing. Thus, several numerical studies have been conducted to assess these problems using coupled Numerical Weather Prediction (NWP) and Computational Fluid Dynamics (CFD). In this study, an experiment was conducted to determine the accuracy of the area of the input field using Weather Research and Forecasting (WRF) model, and applying the more accurate input field to a numerical simulation using ENVI-met, in order to investigate the effect of urban parks on the thermal comfort. The results showed that an input field with a larger area is more accurate than that with a smaller area, because the surrounding terrain and cities are considered in details in the experiment with the larger area. Subsequently, the more accurate input field was used in ENVI-met, and the results of this simulation showed that the presence of the urban park increased the thermal comfort and improved the humidity conditions.
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KEYWORD
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Urban park, Heat comfort, WRF, ENVI-met, Numerical model
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