Soil environment quality zoning method and system

Abstract

The invention provides a soil environment quality zoning method and system. The method comprises the following steps: extracting soil environment quality comprehensive characteristics of monitoring points in a target area based on a principal component analysis method; screening out main influence indexes of the soil environment quality by adopting a geographic detector; establishing a series initialization pre-classification scheme, and determining an optimal pre-classification scheme according to a Bayesian information criterion; constructing a Gaussian mixture model according to the optimal pre-classification scheme, and estimating hidden variable parameters representing sample point categories in the Gaussian mixture model through an EM algorithm to obtain initial classification of the monitoring points; and obtaining an initial partition based on the corresponding Thiessen polygon of the monitoring point, and performing final partition on the target area in combination with natural boundary information of the target area. According to the method, on the basis of the comprehensive characteristics of the soil environment quality of the monitoring points, the Gaussian mixture model based on the EM algorithm is constructed, and comprehensive partitioning of the soil environment quality based on the high-dimensional attribute characteristics is achieved.

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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