Management of the Nakdong-Jeongmaek based on the Characteristics of Cold Air - Focused on Busan, Ulsan, Pohang -

Abstract

This study aims to analyze the properties of cold air production and its flow of Nakdong-Jeongmaek(mountain ranges), and to suggest management strategies for Nakdong-Jeongmaek in order to enhance the green air conditioning functions of Jeongmaek. For this purpose, three study sites including Gudeoksan Mountain and the vicinity in Busan, Goheonsan Mountain and the vicinity in Ulsan, and Unjusan Mountain and the vicinity in Pohang were selected. The results found that cold air flow and its height of the three study sites were analyzed based on topographic properties and land use. Management strategies for preserving and enhancing their temperature reduction functions were suggested. The cold air produced in the vicinity of Gudeoksan was not fully developed and spread because of the high-density development at the border of Jeongmaek. Since high pressures of development are expected at the border, high conservation policies are required. In the vicinity of Goheonsan, where the agricultural complex and industrial park are located, cold air flows well throughout the entire study site thanks to fully developed cold air in the wide, flat valley. Hence, plans to maintain the current cold air flow are required, and conservation plans to mitigate future developments are also needed in the flat valley. The cold air in Unjusan and the vicinity with its complex and narrow mountain valleys gradually develops into valley bottoms. In order to take advantage of the terrain, the valley near the cold air production areas are preserved. In particular, special plans are required to prevent damage to the cold air layer near Youngcheonho Lake, where the highest height of cold air was recorded due to the closed and lower terrain feature. This study could support the establishment of systematic management plans of Nakdong-Jeongmaek to preserve and enhance its green air conditioning functions.

Planning Strategies of Wind Corridor Forests Utilizing the Properties of Cold Air

“…The KALM model calculates the evolution of the cold air flow and the height of cold air layer occurred on a clear and calm night (i.e., nocturnal drainage flow) [23]. It is specialized in analyzing the properties of cold air due to land cover and topographical characteristics [24,25]. To determine the overall wind corridors of Sejong with high rates of calm winds, KALM was selected for this study.…”

Management Strategies of Thermal Environment in Urban Area Using the Cooling Function of the Mountains: A Case Study of the Honam Jeongmaek Areas in South Korea

“…It is useful for analyzing cold airflows over complex topography, such as that in Korea. Therefore, the KALM model was applied to many Korean cities, such as the Pocheon area in Gyeonggi-do [31], the Nakdong Jeongmaek area [23], the part of Daegu Metropolitan City [32], etc.…”

“…The Jeongmaek is the axis of the main mountain ranges of Korea and is characterized by forming near urban areas. Therefore, in densely populated Korean urban areas with difficulty in expanding large-scale greenery [7], using Jeongmaeks with good geographical and topographical conditions has the potential to improve the urban thermal environment [23]. In plans, the local cold can be effectively utilized to draw in fresh air from the Jeongmaek to the city and induce local air circulation.…”