Wind corridor planning and management strategies using cold air characteristics: The application in Korean cities

The urban heat island and air pollution in urban areas due to increased urbanization are becoming serious environmental problems. Urban wind corridor plays a role in solving urban heatwaves and tropical night problems, which worsening at night than during the daytime, and contribute to reducing urban air temperature and improving the urban atmosphere environment. In order to develop active wind corridors in cities, it is necessary to identify the local cold air generated differently according to the spatial characteristics at night. Therefore, we analyzed the characteristics of local cold air formed according to various spatial characteristics using the KALM model targeting three cities in Korea (Cheongju-si, Jeonju-si, and Jinju-si). As results, local cold airflows were the most advantageous in Jeonju-si, where the land use and topographical properties were favorable for the movement and dispersion of cold air. On the other hand, Jinju-si recorded the highest average height of local cold air because it has complex and deep valleys where high layers of local cold air could be accumulated. Based on the analysis, wind corridor planning and management strategies were proposed to maximize the use of local cold air considering to the characteristics and development situation of three different Korean cities.