农用地土壤重金属污染调查最优网格尺度及布点优化方法

秦旭芝; 郑涵文; 何瑞成; 丁文娟; 张军; 崔冠男; 史沛丽; 谢云峰

doi:10.12153/j.issn.1674-991X.20200303

农用地土壤重金属污染调查最优网格尺度及布点优化方法

doi: 10.12153/j.issn.1674-991X.20200303

1.
广西壮族自治区生态环境监测中心
2.
桂林理工大学环境科学与工程学院
3.
生态环境部土壤与农业农村生态环境监管技术中心

详细信息

作者简介:
秦旭芝(1983—),女,高级工程师,主要从事土壤污染调查研究, 495315317@qq.com

通讯作者:
谢云峰 E-mail: xieyf@craes.org.cn

中图分类号: X53
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出版历程
- 收稿日期: 2020-12-29
- 刊出日期: 2021-09-20

Optimal grid scale and sampling design optimization method for heavy metal pollution investigation in farmland soil

1.
Environmental Monitoring Center of Guangxi Zhuang Autonomous Region
2.
College of Environmental Science and Engineering, Guilin University of Technology
3.
Technical Centre for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment

More Information

Corresponding author: Yunfeng XIE E-mail: xieyf@craes.org.cn

摘要

摘要: 为探索土壤重金属污染调查最优网格尺度和布点优化方法,在中南地区某老工业园区附近农田进行了土壤采样分析,通过构建70 m×70 m、100 m×100 m、160 m×160 m和200 m×200 m 4种网格,采用Matheron矩估计法试验和地统计学方法,对土壤中镉(Cd)的污染空间位置估计精度进行分析验证。结果表明,70 m×70 m和100 m×100 m网格尺度下污染区域空间位置的估计精度相似,且高于160 m×160 m和200 m×200 m。对100 m×100 m网格下调查结果不确定区进行加密布点,污染区域空间位置估计精度由78.89%提高至86.25%,相对于70 m×70 m网格,调查点位数量减少了35%,有效提高了污染区域空间位置估计精度,大幅降低了采样及分析成本。
- 重金属污染 /
- 最优网格尺度 /
- 布点优化方法 /
- 矩估计法 /
- 地统计法
Abstract: In order to explore the optimal grid scale and sampling design optimization method for soil heavy metal pollution investigation, soil samples were collected and analyzed in farmland near an old industrial park in central and southern China. Four meshes of different scales, including 70 m×70 m, 100 m×100 m, 160 m×160 m and 200 m×200 m, were constructed, and the estimation accuracy of Cd polluted spatial location in soil was analyzed and verified by estimation test of Matheron moment estimation and geostatistical method. The results indicated that the estimation accuracy of polluted spatial location was similar for 70 m×70 m and 100 m×100 m grid, and higher than 160 m×160 m and 200 m×200 m grid. By encrypting the sampling points on the uncertain region of 100 m×100 m grid, the estimation accuracy of polluted spatial location increased from 78.89% to 86.25%, and the number of investigation samples decreased by 35% for 70 m×70 m grid, not only reducing the cost of sampling and testing, but also improving estimation accuracy of polluted spatial location effectively.
- heavy metal pollution /
- optimal grid scale /
- sampling design optimization method /
- moment estimation /
- geostatistical method

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参考文献(39)

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