Identification method for sandstone uranium deposit supply-discharge-runoff area in ETM remote sensing image

Abstract

The invention belongs to the technical field of multi-spectral remote sensing analysis, and specifically discloses an ETM remote sensing image sandstone uranium recharge-excretion-runoff area identification method: MNF transformation is performed on the original multi-spectral image to obtain image MNF[n]; image MNF is selected [ The second band of n] performs texture analysis to obtain the texture feature image MNF2_Texture; the image MNF2_Texture is density-divided to identify the replenishment area B; the image ETM_cut[n] is calculated by the cap transformation to obtain the humidity indeximage and the vegetation index image, respectively recorded as ETM_Wetness and ETM_Greenness; respectively calculate the high value area of the moisture index image ETM_Wetness high value area and thevegetation index image ETM_Greenness, and perform the union operation, and use the high value area to determine the discharge area P range; according to the above-defined circled supply area B and The discharge area P ranges and the runoff area J is circled. The method solves the problem of image segmentation in runoff area and recharge area, and combines vegetation index analysis to realize quantitative identification of basin recharge area, runoff area and discharge area.

Description

technical field [0001] The invention belongs to the technical field of multispectral remote sensing analysis, and in particular relates to a method for identifying sandstone uranium ore recharge-discharge-runoff areas in ETM remote sensing images. Background technique [0002] The hydrogeological conditions for the formation of sandstone uranium deposits of epigenetic origin are extremely important. The sedimentary basins producing uranium should be large-scale artesian basins with abundant water supply areas and long-distance runoff areas with gentle rock formations (favorable for groundwater slow flow and fully oxidized sandstone), and has a distinct discharge zone. The interlayer oxidation zone formed in the sedimentary cover of the basin is the product of groundwater participating in the epigenetic transformation. Without the epigenetic transformation of groundwater, it is impossible to form the interlayer oxidation zone. Large infiltration of surface leaching water, p...

AI Technical Summary

Problems solved by technology

[0004] At present, the traditional remote sensing method used for the identification of track-replenishment areas mostly uses medium-resolution satellite remote sensing data to extract the humidity index and vegetation index to identify the excretion area; however, due to the small difference in optical information between the runoff area and the recharge area, only the optical features of the image indistinguishable

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