Cooling effect of urban green land on surrounding construction land
Qiu Hailing, Zhu Qingke,Wu Pengfei
1.Beijing Forestry University, Engineering Reserch Center of Forestry Ecological Engineering of Ministry of Education, 100083, Beijing, China;2.Beijing Building Technology Development Co. , Ltd. , 100095, Beijing, China
Abstract：Urban green land plays an extremely important role on alleviating urban heat island effect. In this study, Beijing was selected as the study area, and a Landsat8 TIRS image obtained on July 31, 2013 was regarded as the basic data. The brightness temperature was inversed to express urban heat island effect. With GIS technology, the cooling effect of 30 pieces of urban green land on surrounding construction land was analyzed, and the results were as follows: 1) Brightness temperature inversed by Landsat8 TIRS image data could effectively express the urban heat island effect;2) The order from high to low of the cooling extent of green land on construction land is west > south > north > east; 3) There was an obvious positive correlation between cooling effect of green land and the area ratio of green land to construction land, and the change of the area ratio had the greatest effect on the cooling extent of construction land in the north direction; 4) There was an obvious negative relationship between the cooling effect of green land and the floor area ratio of construction land, and the change of the floor area ratio of construction land in the north direction of green land had the largest influence on cooling extent.
2015, Vol. 13 
