基于GIS和统计学的土壤监测指标时空变化分析

doi:10.11720/wtyht.2023.2687

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Abstract

Soil monitoring is of significance for guiding the determination of the ecological quality of soil, the active ecological restoration and prevention of soil pollution, and the sustainable monitoring and utilization of land resources. To investigate the temporal and spatial changes in the soil monitoring indices in Yixing City, Jiangsu Province, this study collected the geochemical data on 426 soil samples taken during the multi-purpose geochemical survey of Yixing City in 2004 and 4 458 soil samples taken during the 1∶50 000 land quality geochemical survey in 2015. Based on these data, this study analyzed the changes in important soil environmental parameters of the study area using the geographic information system (GIS) and statistics. Moreover, it determined the changes in the parameters or element concentrations using box-whisker plots and t-tests, conducted an error analysis using the nugget value (C₀) based on the semivariance function, and evaluated and analyzed different spatial variables. The results are as follows. From 2004 to 2015, the organic matter (OM) and nutrient elements such as nitrogen, phosphorus, and boron showed an upward trend; the pH of soil showed a significant downward trend; the contents of selenium and heavy metals such as cadmium, copper, lead, and zinc showed an upward trend, and the arsenic content did not change significantly.

Key words： soil monitoring spatio-temporal change GIS semivariance function

Received: 17 December 2021 Published: 24 February 2023

ZTFLH:

P632

Corresponding Authors: WEN Yu-Bo E-mail: hengrucc@126.com;wenyubo@ntu.edu.cn

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	Articles by authors
	Yuan-Yuan WANG
	Ming HUA
	Yang JIN
	Xiao-Dan CUI
	Wei-Wei XU
	Wen-Bo LI
	Wei-Jing LIU
	Zi-Yi WANG
	Yu-Bo WEN

Cite this article:

Yuan-Yuan WANG,Ming HUA,Yang JIN, et al. An analysis of the temporal and spatial changes in soil monitoring indices based on GIS and statistics[J]. Geophysical and Geochemical Exploration, 2023, 47(1): 217-227.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2687 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I1/217

Map of the study area and the sampling locations

Comparison of the soil monitoring data of 2004~2015

Boxplots of the typical heavy metal concentrations for two dates

Boxplots of soil physico-chemical parameters for two dates

Results of t-test for the soil physico-chemical parameters

Results of t-test for As and heavy metals in soil

The semivariance function and the compositional error for pH and other soil parameters

Spatial distribution of pH and other soil parameters change during 2004~2015 in Yixing city

Histograms showing the frequency of the changing for pH, N and other parameters

The semivariance function and the compositional error for As and other trace elements

Spatial distribution of As and heavy metal element change during 2004~2015 in Yixing city

Histograms showing the frequency of the changing for Cd, Zn and Se

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