ENVI-met 시뮬레이션을 통한 도시숲 조성 시나리오별 열환경 개선 효과 분석†

초록

This study aims to create various scenarios of urban forest creation and quantitatively compare their heat reduction effects to suggest an effective scenario. Scenarios were applied to urban areas by adjusting the tree density in street spaces, parks, and school forests, and creating new green spaces in redevelopment sites. A microclimate a simulation program, ENVI-met 5.1.1v, was used to analyze the thermal environment of each scenario. As a result of the analysis, the projection area of tree canopy cover increased as the density of street trees increased, and the thermal environment showed a clear reduction in the temperatures along sidewalks and the ground surface. Comparing all scenarios to the current situation at 14:00, the scenario with an increase in street trees on roads with a width of 10 meters or more reduced the temperature by 0.16℃ and PET by 0.91℃, and the scenario with an additional increase in street trees reduced the temperature by 0.25℃ and PET by 1.67℃, showing that the temperature reduction effect increases as the amount of tree planting increases. For the scenario that increased the planting density of parks and school forests, the temperature and PET were reduced by 0.04℃ and 0.71℃, respectively, within the scenario coverage area. In the scenario where 30% and 50% of a redevelopment site was dedicated as green space, the temperature decreased by 0.03℃ and 0.05℃, respectively, and the PET decreased by 0.26℃ and 0.45℃, respectively, compared to the current situation, showing that large areas of greenery were effective in improving the thermal environment. Based on the results, the scenario that increased the number of street trees was the most effective in reducing the temperature, and the scenario that increased the density of street trees along the boulevard had the greatest impact on temperature reduction in proportion to the number of additional street trees. For PET, the scenario of adding street trees showed the best results in both effective and efficient scenarios. This study is expected to be utilized not only as a basis for various urban forestry projects to improve the urban thermal environment but also to establish planting strategies for efficient thermal environment improvement.

키워드