• 한국환경복원기술학회지
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• 제18권6호
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• pp.15-25
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• 2015

The growth of impermeable layers in the city center due to today's urban development is emerging as a major cause of urban heat island effects as well as recurring inland flood damages. In order to cope with such disasters caused by climatic changes, an artificial ground afforestation system is suggested as a fundamental solution that addresses both water environment and heat environment. For the afforestation system to replace the current disaster prevention facilities, quantitative performance verification through related numerical analysis models and actual survey monitoring is necessary. Therefore, this study seeks to propose the performance predication method for the heat environment of the afforestation system by looking into correlations between measurements by physical vegetation indicators such as LAI and FVC and forecasts from FASST, a vegetation canopy model used by US Corps of Engineers.

• 한국태양에너지학회 논문집
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• 제39권6호
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• pp.67-82
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• 2019

This study aims to examine the impacts of built environmental features on the nocturnal and diurnal temperatures during the heat wave season in Gwangju, Korea. Built environmental measures are summarized at micro-scale level, such as 50 meters and 100 meters from temperature monitoring spots. Regressing the built environment on nocturnal and diurnal temperatures, we estimate how the artificial constructs contribute to temperature either day and night times. We found that impervious surface ratio is positively and negatively associated with nocturnal and diurnal temperatures, respectively. Buildings and structures tend to construct high thermal mass and absorb heat during day time and emit it for the night time. This property contributes to the nocturnal temperature model. On the other hand, urban areas with more vertical structure tend to block sun radiation more than rural, and it is more likely to find the negative relationship between impervious surface ratio and the diurnal temperatures.

• KIEAE Journal
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• 제13권5호
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• pp.67-77
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• 2013

Based on the increasing demand for a solution to reduce thermal load, extensive green roofs have great opportunity for application to existing roofs due to their light-weight and easy maintenance. The present study delivers data regarding thermal behavior and heat reduction potential in relation to vegetation coverage between green roof types. 1) In the hottest hour in a day, green roofs showed considerable potential to mitigate heat load in roof environments, which can be up to $10^{\circ}C$ difference. 2) Compared to conventional cement roofs, the extensive green roofs only have a slight potential to cool the air over green roofs. By statistical analysis of linear regression, green coverage has little to do with the reduction of air temperature; the cooling effect was proven only in nighttime. 3) Green roofs act as an insulating roof membrane, the inner substrate of green roofs remained cooler than cement roof surfaces in the daytime, but in the nighttime the green roofs generally were warmer than the cement roof surfaces. 4) The variable of vegetation coverage resulted in no significant difference in thermal behavior in the air, but had the greatest effect in keeping the substrate cool in the daytime. The high vegetation coverage also hindered the rapid cooling of the substrate in the nighttime, and therefore was warmer than other measured temperatures. In order to draw a clear conclusion to combat urban heat island effect with extensive green roofs, the experiment needs to be applied on a larger scale.

• 한국대기환경학회지
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• 제26권2호
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• pp.137-150
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• 2010

A meso-urban meteorological model (Urbanized MM5; uMM5) with urban canopy parameterization (UCP) was applied to the high-resolution simulation of meteorological fields in a complex coastal urban area and the assessment of urban impacts. Multi-scale simulations with the uMM5 in the innermost domain (1-km resolution) covering the Busan metropolitan region were performed during a typical sea breeze episode (4~8 August 2006) with detailed fine-resolution inputs (urban morphology, land-use/land-cover sub-grid distribution, and high-quality digital elevation model data sets). An additional simulation using the standard MM5 was also conducted to identify the effects of urban surface properties under urban meteorological conditions. Results showed that the uMM5 reproduced well the urban thermal and dynamic environment and captured well the observed feature of sea breeze. When comparison with simulations of the standard MM5, it was found that the uMM5 better reproduced urban impacts on temperature (especially at nighttime) and urban wind flows: roughness-induced deceleration and UHI (Urban Heat Island)-induced convergence.

• 한국조경학회지
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• 제28권1호
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• pp.11-18
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• 2000

Taegu is notorious as hot and dry summer among Korea cities. One of the most important goals of the open space planning is to ameliorate urban climate of the city. The objective of this research is to evaluate the thermal mitigation effect of the cool islands in Taegu metropolitan city. Cool islands of this paper includes parks and rivers surrounded by or adjacent to urbanized areas. Based on the analysis of the thermal band of Landsat TM at May 17, 1997, the thermal mitigation effect of open spaces in the city could be summarized as follows ; Kumho river showed the largest mitigation effect in terms of the width of mitigation zone and temperature difference. Evaporation from wide water surface and evapo-transpiration from riparian grass land could bring into results. Significant mitigation effect of parks covered with forest can be observed. The temperature range of such parks were between 19.05$^{\circ}C$ and 19.44$^{\circ}C$ However, the thermal mitigation effect of Dalsung park and Apsan park was insignificant. The small size and high percentage of hard paving of the former and the relative low density of the residential areas adjacent to the latter could be the main reason. In conclusion, the thermal mitigation effect in urban ope spaces could be detectedby the employment of thermal band data of Landsat TM and GIS buffering technique.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.125-126
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• 2023

Recently, heat island and dry island phenomena occur frequently due to land surface development and excessive energy consumption in urban areas. As a result, the surface temperature of the building and the entire temperature of its surroundings are increased, and as a result, the durability of the building is rapidly deteriorated. In order to suppress these causes, a method of maintaining the temperature of road heating wires was implemented as a temporary measure, but this did not predict climate change. Therefore, this study is a method to measure the compressive strength, density, and thermal conductivity of lightweight concrete using waste glass foam beads. After fabricating a simple chamber, the temperature and humidity of the inside and outside were measured with an Arduino device in consideration of external factors. Therefore, if waste glass foam beads made through proper mixing are constructed in the urban center, the quality of the urban can be improved.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 가을학술발표대회논문집
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• pp.51-52
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• 2023

Recently, heat island and dry island phenomena occur frequently due to land surface development and excessive energy consumption in urban areas. As a result, the surface temperature of the building and the entire temperature of its surroundings are increased, and as a result, the durability of the building is rapidly deteriorated. In order to suppress these causes, a method of maintaining the temperature of road heating wires was implemented as a temporary measure, but this did not predict climate change. Therefore, this study is a method to measure the compressive strength, density, and thermal conductivity of light weight concrete using waste glass foam beads. After fabricating a simple chamber, the temperature and humidity of the inside and outside were measured with an Arduino device in consideration of external factors. Therefore, if waste glass foam beads made through proper mixing are constructed in the urban center, the quality of the urban can be improved.

• KIEAE Journal
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• 제11권1호
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• pp.29-38
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• 2011

This study suggested practical application of climate design on apartment complex with the focus on the use of Cold Air Flow and green building design method. The domestic research on the wind path analysis has been associated since the early 21th century in urban planning and site planning, this initiative study aimed to mitigate the urban heat island effect and to promote the sustainable urban development. It is, however, mostly focused on the flow analysis and heat flow in the urban context, due to the poor application of the wind path analysis in actual planning and design. Special attention is paid to the possibilities of identifying and developing the application methods in relation to Cold Air Flow and building design. This study examined these relations and suggested some trenchant approach to a more comprehensive and efficient use of the wind flow analysis in climate design.

• 한국지리정보학회지
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• 제22권2호
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• pp.65-81
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• 2019

본 연구는 대한민국 경상남도 김해시를 대상으로 토지피복유형과 도시온도 간의 관계성을 분석하였다. 자료는 2000~2010년의 토지피복도와 MODIS 표면온도, RCP 기반 한반도 상세 기온자료를 활용하였다. 시가화지역의 면적비율과 표면온도의 상관성은 0.417, 농업지역은 0.512, 산림 지역은 -0.607로 나타났다. 표면온도와 기온의 상관성은 0.301이었다. 기온과의 상관성에서는 시가화지역이 0.275, 농업지역 0.226, 산림지역 0.350으로 분석되었다. 시가화지역과 농업지역은 면적이 증가할수록 표면온도와 기온이 증가하는 것으로 나타났고, 산림지역은 반대의 향상을 보였다. 구조방정식 모형 결과에서는 시가화지역과 농업지역은 표면온도 상승에 직접적인 효과가 있고, 산림지역은 기온 저감에 직접적인 효과가 있었다. 향후에는 지표면 부근에서 측정된 기온자료를 활용하여 공간특성의 변화에 따른 표면온도와 기온의 관계성을 파악하는 것이 필요하며, 이를 통해 도시 및 환경계획 차원에서 도시열섬 완화를 위한 방안을 마련할 것이다.

• 한국지리정보학회지
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• 제26권1호
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• pp.69-88
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• 2023

효율적인 공간계획은 기후변화에 성공적으로 대응하기 위해 필요한 요소 중 하나이다. 연구자들은 흔히 토지이용 및 공간계획 연구를 수행하기 위해 LULC(Land-Use/Land-Cover) 데이터를 활용하고 있다. 그러나 LULC 데이터는 어떠한 도시 표면의 특징을 분류할 수 있는 조건이 몇 가지로 한정되어 있어 여러 도시에서 나타나는 각기 다른 도시구조를 기존 토지피복 분류법으로는 쉽게 분석할 수 없다. 이러한 토지피복 자료의 한계는 도시 열섬 분야에서 사용되는 LCZ(Local Climate Zone) 자료를 통해 극복될 것으로 보인다. 따라서 본 연구는 먼저 LCZ 데이터가 도시 열섬 분야뿐만 아니라 다른 분야에도 적용될 수 있는지를 논의하고, 두 번째로 LCZ 데이터가 기존 LULC 데이터의 문제점을 동일하게 가지는지 논의하는 것을 목적으로 한다. 연구 방법론은 크게 두 가지로 진행된다. 첫째, 문헌고찰을 통해 LCZ와 관련된 기후, 토지이용, 도시공간구조 분야의 연구를 종합하여 현재 어떤 연구에 LCZ 데이터가 활용되고 있는지, 토지이용과 도시공간구조 분야에서 어떻게 적용·활용될 수 있는지 분석한다. 다음으로 GIS 공간분석을 활용하여 LCZ 데이터도 역시 LULC 데이터에 내재한 몇 가지 오류를 공유하고 있는지에 대해 비교·분석한다.