LandSat8热红外遥感数据在甘肃临夏市地热资源调查中的应用

利用热红外遥感技术进行地热异常信息的提取可以为地热资源勘查评价提供重要的依据。本文以甘肃临夏市为研究区，选用2013年10月11日、2015年2月3日、2021年2月19日、2021年3月23日LandSat8数据，采用大气校正法进行地表温度反演，结合地形及地质构造等资料，去除传感器因子、时间因子、温度因子、构造因子等假的地热异常，判读出由于地热资源引起的地热异常可能区域有9个。其中，7号区域实地勘查出地热资源。研究表明，利用长时间跨度的秋冬季节LandSat8热红外数据可以有效提取临夏市地热异常信息；热红外遥感方式在地热调查中能减少外业工作量，但不能代替传统地热勘探方法；结合地形地质资料判读时，必须与专业知识相结合才能取得较好的应用效果。

Application of Landsat8 Thermal Infrared Remote Sensing Data in Geothermal Resources Investigation in Linxia City of Gansu Province

Using thermal infrared remote sensing technology to extract geothermal anomaly information can provide an important basis for geothermal resources exploration and evaluation. In this paper, Linxia City, Gansu Province is taken as the research area, with the selected LandSat8 data on October 11 th, 2013, February 3 rd, 2015, February 19 th, 2021 and March 23 rd, 2021, inverting the surface temperature by atmospheric correction algorithm and combining with the data of topography and geological structure to remove the false geothermal anomalies such as the factors of sensor, time, temperature and structure, it would deduce that there are 9 possible areas of geothermal anomalies caused by geothermal resources and geothermal resources were discovered on the spot in Area 7 among them. The study showed that the geothermal anomaly information in Linxia can be extracted effectively by the long time spanned LandSat8 thermal infrared data in autumn and winter. Infrared remote sensing can reduce the field workload in geothermal survey, but it can''t replace the conventional geothermal exploration method. The better application effect only could be achieved by combining the professional knowledge when interpreting topographic and geological data.