卫星热红外遥感地表温度反演在隐伏断层识别中的应用——以骊山山前断裂为例  

Using satellite thermal infrared images in land surface temperature inversion for identifying hidden faults:a case of Lishan piedmont fracture

作　　者：史超[1] 黄超[1] 聂峰 李书[1] Shi Chao;Huang Chao;Nie Feng;Li Shu(Chang jiang Reconnaissance Technology Research Institute,The Ministry of Water Resources,Wuhan 430011,China)

机构地区：[1]水利部长江勘测技术研究所,武汉430011

出　　处：《工程勘察》2020年第3期45-50,共6页Geotechnical Investigation & Surveying

基　　金：国家重点研发计划专项项目课题“山洪灾害动态预警与风险评估平台构建(2017YFC1502505)”资助.

摘　　要：断层通过区域会存在第四纪残积物富集及土壤覆盖层较厚等表现,隐伏断层难以识别,但高覆盖也会与其他区域形成差异,形成间接信息,进而指示隐伏断层的存在。间接信息主要指断层破碎带通过区域形成覆盖异常,包括高土壤湿度、高植被覆盖、覆盖层增厚等,这些差异也间接形成地温低值区,形成地温负异常区。上述间接效应运用热红外遥感可利用TVDI指数加以体现,通过温度植被干旱指数将地表温度和土壤湿度相结合,进而增强隐伏断层信息,便于后期基于热红外遥感提取隐伏断层信息,其中TVDI的呈线性展布的低值区可以作为指示隐伏断层的解译标志。基于Landsat7 ETM+数据基础上,综合热红外遥感地表温度反演方法、TVDI计算方法等方法获得温度植被干旱指数结果图,在陕西临潼骊山地区开展基于热红外遥感隐伏断层识别应用研究。通过对热红外遥感陆地表面温度反演方法的应用,结合可见光遥感影像地质解译及野外地质调查对解译结合进行复核验证,了解并控制了骊山山前断裂的基本走向。通过以上研究获得的成果表明,卫星热红外遥感技术在识别隐伏断层方面具有较大的潜力。There are rich Quaternary deposits and thick soil cover layers in the fault-passing area.The hidden faults are difficult to identify,but the high coverage in hidden fault area are also shows differences from other place with indirect information,which may indicate the existence of hidden faults.The indirect information mainly refers to the formation of coverage anomalies in the fracture zone of the fault,including high soil moisture,high vegetation cover,and thickening of the cover layer.These differences also indirectly form a low temperature zone with a negative temperature abnormal.The indirect effect can be reflected by the TVDI index by using thermal infrared satellite images.The temperature and vegetation drought index combine surface temperature and soil moisture to enhance the hidden fault information,which is convenient for extracting hidden faults.The low value area of the spread can be used as an interpretation mark indicating the hidden fault.Based on the Landsat7 ETM+data,the integrated thermal infrared surface temperature inversion method and TVDI were used to obtain the temperature vegetation drought index results.The application of thermal infrared images for hidden fault identification was carried out in the Linyishan area of Shaanxi Province.Through the application of thermal infrared land surface temperature inversion method,combined with geological interpretation of the optical satellite images and also field geological survey,the results are verified,and the basic trend of the piedmont fault is understood and controlled.The results obtained through the above research indicate that satellite thermal infrared technology has great potential in identifying hidden faults.

关 键 词：热红外遥感 地表温度反演 TVDI 隐伏断层 

分 类 号：P237[天文地球—摄影测量与遥感]