Simulation of cooling effect of street trees to improve the thermal comfort for pedestrians in movement in urban space

As urban heat island phenomenon is becoming more serious due to urbanization and climate change, green areas are mainly emphasized as a representative response strategy. However, there is a lack of methods to evaluate the level of planting necessary to adapt to urban heat islands and the cooling effect according to planting. Existing evaluation methods are difficult to use by public officials, city planners, and environmental planners, because of too complex, requiring a lot of input data, or requiring a lot of computer performance. This study aims to develop a model as a means of evaluating the urban thermal environment and evaluating the effect of green space planning, and to evaluate the cooling effect of trees in the walking space through the model. Since the simulated target site in this study has three consecutive lengths forming different angles, the direction of the shadow due to the building varies according to each time. As a result, the cooling effect of trees changed depending on the road, which means that the arrangement of trees to improve the thermal environment should be applied differently depending on the space. Using the model presented in this study, it is possible to evaluate the continuous thermal comfort according to the pedestrian in movement, so that vulnerable areas can be easily identified and planting plans can be made.