Detection of geothermal resources in Litang Basin based on multi-temporal thermal infrared remote sensing
Geothermal energy is an environmentally friendly,renewable underground thermal energy inside the earth.The conduction of heat to the surface will cause land surface temperature anomalies.However,land surface temperature is affected by many factors such as solar radiation,cyclic changes and precipitation,which may mask temperature anomalies caused by geothermal heat.In order to solve these problems and highlight the land surface temperature anomalies caused by geothermal heat,this paper proposes a method to efficiently and quickly calculate the multi-temporal winter average land surface temperature and extract geothermal anomalies using Google Earth Engine(GEE),and studies the distribution characteristics of geothermal resources in Litang Basin.This method comprehensively uses multi-temporal winter average land surface temperature comparative analysis,water body removal,terrain effect suppression and other means to extract geothermal anomaly zones.The results indicate that eight geothermal anomaly zones are closely associated with fault structures.Moreover,these zones have abundant water resources and favorable conditions for the formation of geothermal resources,thus serving as the key direction of geothermal exploration in the future.Meanwhile,this study suggests that using multi-temporal average winter land surface temperatures to identify geothermal anomalies is an efficient and economical method in the harsh environment of the plateau.
NETL
NSTL
万方数据
