基于Landsat8的凤永高速地表温度反演

Land surface temperature inversion for Fengyong Expressway based on Landsat 8

在隧道建设过程中,高地温热害会影响机械设备效率和施工进度,还会恶化作业环境、对人员安全造成威胁,因此,精准识别地热异常区对隧道建设非常重要。热红外遥感是用遥感的方法探测地球表面的温度,以此为基础利用遥感技术反演地表温度愈发可靠。以云南省凤永高速凤庆-领岗地隧道为研究区域,采用Landsat8影像数据,运用大气校正法对研究区进行地表温度反演,再利用DEM数据制作地形坡向文件,按阳坡、阴坡分布提取地表温度,结合地质构造对地表温度异常进行分析,圈定地热异常区。

During tunnel construction,high ground temperature heat damage not only affects the efficiency of mechanical equipment and construction progress,but also worsens the operating environment and poses a threat to personnel safety.Therefore,accurate identification of geothermal anomaly areas is very important for tunnel construction.Thermal infrared remote sensing is the use of remote sensing methods to detect the temperature of the Earth's surface,and using remote sensing technology to retrieve surface temperature is becoming increasingly reliable.Taking the Fengqing Linggangdi Tunnel of Fengyong Expressway in Yunnan Province as the research area,using Landsat 8 image data and atmospheric correction method to retrieve the surface temperature in the research area,then using DEM data to create topographic slope orientation files,extracting the surface temperature according to the distribution of sunny and shady slopes,and analyzing the surface temperature anomalies in combination with geological structures to delineate geothermal anomaly areas.