Weathered layer thickness mapping method based on high resolution satellite remote sensing technology

The thickness of the weathered layer at the regional scale is one of the important factors that restrict the geological engineering construction, the military capacity of the land, and the underground military construction of the shallow surface. Traditional methods often require extensive field surveys and field sampling, which are inefficient and cannot be completed in areas inaccessible.Therefore, the use of high resolution satellite remote sensing technology to carry out regional scale weathered layer thickness mapping research is very important. Based on the field survey, GF-2 remote sensing data were used to obtain lithology, plant community and land cover type distribution map of the study area, and the topographic map based on ASTER GDEM data was obtained. Then, based on the cloud model theory, the slope, lithology and land cover type are used as influencing factors, and the weathered layer thickness map of the study area is obtained by comprehensive evaluation. The results are in good agreement with field verification data, with the accuracy up to 81.69%.