A rock weathering degree extracting method based on the satellite remote sensing technology

Abstract

The invention belongs to the technical field of remote sensing geology and in particular relates to a rock weathering degree extracting method based on the satellite remote sensing technology. The method comprises the steps of determining the indexes of correlation of the rock weathering degree; analyzing the coupling relationship between the rock weathering degree and the formation lithology and slope grade; establishing a rock weathering degree characteristic curve; building a rock weathering degree characteristic model. The method solves the technical problems that conventional methods cannot extract the rock weathering degree accurately and rapidly, exploits the advantages of rapid and large-area information acquisition of remote sensing, can extract the rock weathering degree accurately and rapidly and can be applied to rock weathering degree division of mass data.

Description

technical field [0001] The invention belongs to the technical field of remote sensing geology, and in particular relates to a method for extracting rock weathering degree based on satellite remote sensing technology. Background technique [0002] Rock weathering refers to the synthesis of various effects that change the mineral composition, structural state, and physical and mechanical properties of rocks. It mainly includes various factors such as the sun, the atmosphere, water, and organisms. [0003] Weathering is one of the important factors that affect the nature of rock engineering. Accurately classifying the weathering degree of rock is an important content to provide safe design parameters for engineering design. The division of rock weathering degree and the study of engineering characteristics play a key role in the selection of large-scale hydropower projects, high-rise buildings, roads and bridges and other engineering building bases and the determination of foun...

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Problems solved by technology

[0007] (1) Using the ground method to study the degree of weathering requires a huge amount of manpower, material resources, and financial resources, and its work efficiency is also very low, which is difficult to meet the needs of research on the degree of weathering in the context of massive data; in addition, for many geologically complex areas, especially high vegetation coverage area, which is difficult to study using ground-based methods to study the degree of weathering

[0008] (2) There are mainly the following problems in using the spectral characteristics of rocks to study the degree of weathering: ① areas with large vegetation coverage and small rock outcrops cannot reflect the spectral characteristics of rocks, making it difficult to interpret the degree of weathering of rocks; ② For the case of the same object with different spectrum and different objects with the same spectrum, the accuracy of the weathering interpretation is significantly reduced, and even errors occur; Glossy, therefore, it is difficult to study microweathering by spectral signature

[0009] (3) Using remote sensing and visual interpretation to judge the degree of weathering not only consumes a lot of time, but also makes it difficult to accurately divide the degree of rock weathering

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