热红外遥感在地热异常提取中的应用

Application of Thermal Infrared Remote Sensing Technology in Extracting Heat Anomalies of Geothermal

热红外遥感技术对地热的研究是一项非常重要的手段,在对地热的研究中,利用Landsat8卫星数据源的热红外波段,采用辐射传输方程算法进行地表温度反演,结果发现受地形因素的影响,温度反演的热异常点分布在接收太阳辐射较多的区域。为了减弱这一影响,该研究进行了地形校正,并以抚松县地区为研究对象分析了地表温度的热异常状况。结果表明,经过地形校正,在一定程度上显现了真实的温度异常区域,抚松县内已知的2个地热资源也在反演结果中显示出来,并且该县的北部与西南部都有地表温度异常区,可以作为地热资源的预测。

Thermal infrared remote sensing technology is a very important tool to the study of geothermal. The surface temperature was inversed by using radiative transfer equation algorithm and the data source is the thermal infrared band of satellite Landsat8. It was found that the abnormal thermal inversion points tend to appear in the regions where they receive more solar radiation,being affected by the topography. In order to reduce the impact of topography,a topographic correction was conducted,and the heat anomalies of the surface temperature in a case study of Fusong area were analyzed. After topographic correction,the results show the true temperature to a certain extent in the former anomaly region,and both the known geothermal resources within Fusong are obtained in the inversion results. Besides,there are heat anomalies of the surface temperature areas in the north and southwest of the county shown in the inversion results,which could predict geothermal resources.