基于高斯混合模型的土壤环境质量分区研究  

Soil environmental quality zoning based on the Gaussian mixture model

作　　者：刘佳斌 郜允兵[2] 李永涛[1] 徐卓揆[3] 潘瑜春[2] 杨晶 张婉秋 LIU Jiabin;GAO Yunbing;LI Yongtao;XU Zhuokui;PAN Yuchun;YANG Jing;ZHANG Wanqiu(South China Agricultural University,Guangzhou 510642,China;Beijing Research Center for Information Technology in Agriculture,Beijing 100097,China;School of Traffic&Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]华南农业大学,广州510642 [2]北京农业信息技术研究中心,北京100097 [3]长沙理工大学交通运输工程学院,长沙410114 [4]中国矿业大学(北京),北京100083

出　　处：《农业环境科学学报》2021年第8期1746-1757,共12页Journal of Agro-Environment Science

基　　金：广东省重点领域研发计划项目(2019B020218002);国家自然科学基金面上项目(42077001);北京市农林科学院科技创新能力建设专项(KJCX20200414);国家重点研发计划项目(2017YFD0801205)。

摘　　要：受自然环境因素、人为活动因素综合作用,土壤环境质量在空间上具有明显分层异质性,基于采样点进行环境质量分区是土壤环境质量管理中的关键问题。本文提出一种基于采样点与辅助因素的土壤环境质量分区方法,在采用地理探测器分析土壤环境质量主要影响因素的基础上,运用高斯混合模型对土壤采样点进行属性聚类,结合河流道路等对聚类结果进行边界调整,形成环境质量分区。以北京市顺义区采样数据为例开展方法验证,结果表明:本方法的分区结果优于SOFM聚类、K-means聚类,适用于人为和自然活动综合影响的环境质量分区。Because of the comprehensive effects of natural environmental factors and human activities,soil environmental quality exhibits spatial heterogeneity.Environmental quality zoning based on sampling points is of concern in the management of soil environmental quality.In this study,a soil environmental quality zoning method based on sampling points and auxiliary factors was proposed.Based on the main influencing factors of soil environmental quality measured by geographic detectors,attribute clustering of soil sampling points was conducted using the Gaussian mixture model.Clustering results were dynamically adjusted in combination with rivers and roads to form environmental quality zones.This method was verified using sampling data for the Shunyi District of Beijing as an example.The results showed that the zoning results of this method were better than those of SOFM and K-means clustering,and were suitable for environmental quality zoning under the comprehensive influence of human and natural activities.

关 键 词：环境质量分区 高斯混合模型 空间聚类 地理探测器 土壤重金属 

分 类 号：X825[环境科学与工程—环境工程]