典型喀斯特城区土地利用变化对地表温度的影响分析

Analysis of the Impacts of Land Use Change in a Typical Karst Urban Area on Surface Temperature

利用TM遥感影像数据,运用ENVI及GIS技术,提取典型喀斯特城区（白云区）2002~2013年的土地利用覆盖类型,并反演出地表温度,从而进一步分析探讨土地利用变化对地表温度的影响。贵阳市白云区是贵阳市重点工业区和新2型工业集中分布区,在2002~2013年土地利用变化明显,特别是城区建设用地增加显著,从35.11增加到71.81 km,并占用了大量耕地和灌疏林。白云区土地利用类型的变化引起地表温度的改变,尤其是建设用地的扩张对地表温度影响较大。对地表温度与NDVI关系进行分析,结果表明不同土地类型的地表温度与NDVI相关程度不同。

In this paper, by use of the remote sensing data and employment of ENVI and GIS technologies, land use change in a typical Karst urban area （Baiyun District） from 2002 to 2013 was extracted and anti-performance of surface temperature was conducted to further analyze the impacts of land use change on surface temperature. Baiyun District was a key industrial zone and a new industrial centralized area in Guiyang City. Land use in the district was changed significantly from 2002 to 2013. Especially, the land for urban construction increased greatly from 35.11 to 71.81 km2, occupying a large amount of cultivated land and woodland. Land use change had impacts on surface temperature variation, especially the expansion of land use for construction. Analysis of the relationship between surface temperature and NDVI indicated that surface temperature of different land types had different correlation with NDVI.