공원 크기에 따른 공원의 온도저감 효과 분석: 일산 신도시를 대상으로

Abstract

To solve the problem of intensified urban heat island effect in the city, development of green spaces and parks are proposed as one of effective interventions for mitigating urban heat island effect. Accordingly, substantial number of studies have investigated the role of urban parks, in particular, associations between park sizes and cooling effect. However, it is still unknown whether distance decay of the cooling effect varies by the park sizes. This paper aims to explore cooling effect of park by size, find a minimum size of parks after controlling other environmental variables, and investigate variations of distance decay of the cooling effect by size. Examining cooling effect of 37 parks in Ilsan new town, Korea, this study derived land surface temperature of Ilsan from Landsat 8 data while controlled NDVI, NDBI, Albedo, landuse and DEM that may affect land surface temperature. The size of selected parks was categorized to 10 classes. The results of multiple regression showed that the cooling effect tends to increase as park size grows. Empirical analysis indicated that cooling effect of parks on adjacent land was found when the park size was larger than 6,000 ��. Distance decay of the cooling effect on adjacent land, however, was shown to be sharper when the park size increased, thus park size was not found to be an influential factor to increase maximum cooling distance.