Journal of the Korean Association of Geographic Information Studies (한국지리정보학회지)

The Korean Association of Geographic Information Studies (한국지리정보학회)
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Management Strategies of Local Cold Air in Jeongmaek for utilizing urban Ventilation Corridor - A Case Study of the Nak-nam Jeongmaek -

바람길 활용을 위한 정맥의 찬공기 관리 방안 - 낙남정맥을 사례로 -

  • EUM, Jeong-Hee (Dept. of Landscape Architecture, Kyungpook National University)
  • 엄정희 (경북대학교 산림과학.조경학부 조경학전공)
  • Received : 2019.03.14
  • Accepted : 2019.03.27
  • Published : 2019.03.31
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Abstract

As urban heat environment problems occur due to climate change, urban thermal environmental problems such as heat waves and tropical nights are becoming more serious in cities. In South Korea, forest areas favorable for generating cold air account for about 63 percent of the land area. Furthermore, the Jeongmaek, the axis of the main mountain ranges of Korea, is located close to the cities. Hence, the management of cold air is an effective way to improve the thermal environment of Korean cities. We selected the Nak-nam Jeongmaek located in the southern part of Korean Peninsular as well as two cities (Jinju-si and Sancheong-gun) located at the Jeongmaek to analyze its cold air characteristics and suggest management strategies of cold air. We used KALM (Kaltluftabflussmodell), a cold air simulation model developed in Germany and identified both the cold air flow and the height of cold air layer generated during 6 hours at night. As a result, the cold air flow generated in the Jeongmaek became clear and the height of cold air layer increased with time. Based on the results, we proposed management plans to maintain and expand the cold air flow. For example, forest areas with active cold air generation were designated as 'cold air conservation areas', and areas requiring management for good cold air flow were as 'cold air management areas'. This study is expected to be useful for establishing systematic urban ventilation plan to improve thermal environment in Korea cities.

기후변화에 따른 각종 환경문제가 발생하는 가운데, 도시에서는 폭염, 열대야와 같은 도시 열환경 문제가 심각해지고 있다. 한국은 찬공기 생성에 유리한 산림지역이 국토면적의 약 63%을 차지하고 있으며, 주요 산줄기인 정맥은 도시지역과 밀접하게 위치해 있기 때문에 찬공기를 활용하는 것은 도시 열환경 완화에 매우 효과적인 방안이 될 수 있다. 본 연구에서는 낙남정맥을 대상으로 정맥에 위치한 도시들의 바람길 활용 방안을 마련하기 위해 정맥의 찬공기 특성을 알아보고, 이를 바탕으로 낙남정맥의 찬공기 관리방안을 제안하였다. 또한, 낙남정맥에 위치한 진주시와 산청군을 대상으로 상세분석을 수행하여, 정맥에서 생성된 찬공기 흐름이 인근 도시 지역에 미치는 영향을 분석하고 이를 바탕으로 도시지역에서 찬공기를 활용하기 위한 관리방안을 제시하였다. 찬공기 특성 분석을 위해 독일에서 개발된 모형인 KALM(Kaltluftabflussmodell)을 활용하였으며, 야간 6시간 동안 생성되는 찬공기 흐름 및 찬공기층 높이를 파악하였다. 분석 결과, 시간이 경과함에 따라 정맥에서 생성된 찬공기 흐름이 뚜렷해지고, 찬공기층의 높이는 증가하였다. 찬공기 분석 결과를 바탕으로, 찬공기 흐름을 유지 및 확대할 수 있는 관리방안을 제안하였다. 예를 들어, 찬공기 생성이 활발한 산림지역 일대를 '찬공기 보전지역'으로 지정하고, 원활한 찬공기 흐름을 위해 관리가 필요한 지역을 '찬공기 관리지역'으로 지정하여 전략을 제시하였다. 본 연구의 결과는 낙남정맥에 위치한 도시지역의 쾌적한 열환경 조성을 위한 바람길 활용방안의 일환으로 낙남정맥의 체계적인 관리계획을 수립하는데 기초자료로 활용될 수 있을 것으로 기대한다.

Keywords

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FIGURE 1. Study area

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FIGURE 2. Elevation and land use around Nak-nam Jeongmaek

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FIGURE 3. Elevation and land use around Jinju-si and Sancheong-gun

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FIGURE 4. Hourly variation in the velocity of local cold air in the vicinity of Nak-nam Jeongmaek during six hours after sunset from KALM model simulatoins

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FIGURE 5. Hourly variation of the altitude of local cold air layers in the vicinity of Nak-nam Jeongmaek during six hours after sunset from KALM model simulations

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FIGURE 6. The local cold airfows after six hours of cold air generation

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FIGURE 7. The local cold airfows of specific areas in Nak-nam Jeongmaek

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FIGURE 8. Hourly variation in the velocity of local cold air in Jinju-si and Sanceong-gun during six hours after sunset from KALM model simulatoins

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FIGURE 9. The local cold air flows in Jinju-si

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FIGURE 10. Hourly variation of the altitude of local cold air layers in Jinju-si and Sanceong-gun during six hours after sunset from KALM model simulations

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FIGURE 11. Management strategies for preserving and enhancing cold air functions in the Nak-nam Jeongmaek

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FIGURE 12. Cold air flows and development plans in Jinju-si (near Jinyang-ho)

TABLE 1. Average and maximum wind speed by administrative areas (m/s)

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TABLE 2. Average and maximum wind speed by administrative areas (m/s)

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