重庆市南岸区土地利用与地表温度响应研究

Research on Response of Land Use and Surface Temperature in Nan’an District of Chongqing City

以重庆市南岸区为例,应用遥感技术和地理信息系统技术,选取Landsat 5 TM影像和Landsat 8 OLI_TIRS影像作为主要数据源,基于单窗算法反演地表温度,并结合该区土地利用变化研究两者的响应关系。结果表明,南岸区耕地和林地在减少,建设用地在增加,共有31.32 km^(2)的耕地和林地转为了建设用地;南岸区的高温区由西部逐渐转移到中部和南部,2013年之前的升温区和降温区呈现东西均匀分布,2013年之后大部分区域处于升温区;南岸区不同土地利用类型的地表温度高低以及升温速率呈现出建设用地>耕地>林地>水域;城市土地连片扩建会升高地表温度,林地在规模范围内对地表温度能产生显著的降温效应。

Taking Nan’an District of Chongqing City as an example,remote sensing technology and GIS technology were applied.We used Landsat 5 TM image and Landsat8 OLI_TIRS image as the main data source,based on the single-window algorithm to invert the surface temperature,and combined with the land use change in the area to study the relationship between the two responses.The result showed that arable land and forest land were being reduced,and construction land was being increased in the Nan’an District,and a total of 31.32 km^(2) of arable land and forest land had been converted to construction land.The high temperature area in Nan’an District gradually shifted from the west to the middle and the south.The warming and cooling areas before 2013 showed an even distribution from east to west,and most of the areas were in the warming area after 2013.The surface temperature of different land use types in Nan’an District and the warming rate presented construction land>arable land>forest land>water areas.The expansion of urban land will increase surface temperature,and the forest land in the scope of land surface temperature can produce a significant cooling response.