A ground-penetrating radar-based method for spatial prediction of underground structure in red soil critical zone

Abstract

The invention relates to a method of spatial prediction for underground structures of key red-soil zones based on a ground penetrating radar, which includes Step A, to construct a database of underground structure of target key red-soil zones; Step B, to measure target key red-soil zones and obtain radar image data of target key red-soil zones; Step C, to interpret radar images of target key red-soil zones and obtain radar image interpretation results; Step D, to update the database of the underground structure of the target red soil key zones; Step E, to construct a three-dimensional prediction model of the underground structure of the target red soil key zones, and to obtain the spatial distribution of different layers of the underground structure of the target red soil key zones. The designing method can not only give a key zone's detailed structure definition, database construction and ground penetrating radar operation process, but also quantify the spatial coupling relationship between the thickness / type of a key zone structure and environmental variables.

Description

technical field [0001] The invention relates to a ground-penetrating radar-based method for predicting the underground structure space of a red soil critical zone, and belongs to the technical field of soil measurement. Background technique [0002] The Earth’s critical zone is the area where the soil, atmosphere, biosphere, hydrosphere, and lithosphere material migration and energy intersect in the Earth’s surface system. In the vertical direction, it includes the area from the vegetation canopy to the underground aquifer. It is the area for human survival and development. core area. The formation of soil has experienced the weathering process of bedrock: unweathered→slightly weathered→moderately weathered→strongly weathered→residual soil. Broadly speaking, the unweathered bedrock layer is defined as the lower boundary of the critical zone, which is the depth from the surface to the unweathered bedrock. This thickness is of great significance to regional and even global a...

AI Technical Summary

Problems solved by technology

Through a large number of geological drilling, relevant information on the underground structure of the red soil critical zone in this watershed has been obtained, but the information on the underground structure of the red soil area at the municipal, provincial and other regions is still relatively scarce

[0008] (2) The definition of the structure and thickness of the critical zone of red soil is not clear enough, and there is a lack of uniform standards

[0009] (3) Computer physics problems

The high cost of drilling leads to very limited data acquisition and the high spatial variability of the critical zone structure, leading to high uncertainty in the predictive model

Existing 3D soil mapping methods pay more attention to soil prediction at a depth of one meter, and pay less attention to the vertical dimension variation characteristics of physical and chemical properties of different regolith layers in critical zones

[0010] (4) Existing econometric soil science technology pays more attention to two-dimensional mapping or three-dimensional mapping of shallow soil (1-2m) dominated by plant root growth layer, and lacks the structure and thickness inversion of critical zones combined with geophysical exploration methods. The relevant technical system for expressing the spatial structure of the critical zone has not been comprehensively and systematically developed, especially the irregular three-dimensional space simulation and expression for the underground critical zone

[0011] The above-mentioned technical defects have seriously affected the efficient acquisition of underground structure information in the red soil area, and have directly hindered the related work of different industry departments, reduced the efficiency and accuracy of production and processing of soil information products, and indirectly brought new problems to national economic planning and regulation. potential loss

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