Method and system for zoning soil environment quality

Abstract

The invention provides a soil environment quality zoning method and system. The method includes: extracting the comprehensive characteristics of the soil environment quality of the monitoring points in the target area based on the principal component analysis method; using a geographic detector to screen out the main impact indicators of the soil environment quality; establishing A series of initialization pre-classification schemes, using the Bayesian information criterion to determine the best pre-classification scheme; constructing a Gaussian mixture model with the best pre-classification scheme, and estimating the latent variable parameters representing sample categories in the Gaussian mixture model through the EM algorithm, and obtaining The initial classification of monitoring points; the initial partition is obtained based on the corresponding Thiessen polygon of the monitoring point, and the final partition of the target area is carried out in combination with the natural boundary information of the target area. The invention builds a Gaussian mixture model based on the EM algorithm based on the comprehensive characteristics of the soil environment quality at monitoring points, and realizes the comprehensive division of the soil environment quality based on high-dimensional attribute characteristics.

Description

technical field [0001] The invention relates to the fields of agriculture and computer technology, in particular to a method and system for zoning soil environment quality. Background technique [0002] The influencing factors of soil heavy metals are divided into natural factors and human factors. The natural factors are mainly soil parent rock, and the human factors can be divided into industrial sources (such as mining, smelting, coal burning, transportation, etc.), agricultural sources (fertilizers, pesticides, irrigation water, etc.) and living sources (traffic, domestic wastewater, domestic waste, coal, etc.). Soil parent rock and soil-forming conditions are the main reasons for the regional differences in background values. Factors such as climate, biology, topography and landform play an important role in the process of soil formation and transportation, and affect the zonal distribution of heavy metals in soil. The production of industrial and mining enterprises a...

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a soil environment quality zoning method and system, which are used to solve the defect that the traditional method in the prior art cannot satisfy the soil environment quality zoning, and realize the precise zoning of the soil environment

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