Monitoring Site Layout Method for Heavy Metal Pollution of Cultivated Soil Under Different Data Scenarios

doi:10.11924/j.issn.1000-6850.casb2021-0795

Abstract

Abstract:

Guiding the layout of monitoring sites using basic data has become a research hotspot in recent years. Taking the monitoring of heavy metal Cd pollution in Shunyi District of Beijing as an example, monitoring site layout method for heavy metal pollution of cultivated soil under different data scenarios was developed in this study. Firstly, the basic data scenarios of heavy metal pollution monitoring in cultivated soil were divided. Secondly, the characteristics and applicable data situations of the monitoring site layout method were discussed. Finally, the even variation index and deviation index were adopted to evaluate the uniformity of monitoring sites. The research results showed that: (1) five basic data scenarios were identified based on historical and auxiliary data, namely no historical and auxiliary data, only auxiliary data, only historical data, historical and auxiliary data, and sufficiently historical data; and system/random sampling layout, unbiased sampling layout, encrypted sampling layout, encrypted/unbiased sampling layout and data refinement layout strategies were correspondingly recommended; (2) no historical and auxiliary data were in the western Shunyi District and the corresponding system sampling layout was adopted, while sufficiently historical data were in the eastern Shunyi District and the corresponding data refinement layout was used. Moreover, the even variation index of Shunyi District decreased from 0.546 to 0.490, especially to 0.468 in the eastern Shunyi District, and the deviation index was smaller than the original sampling site layout. It is confirmed that the monitoring site layout method for heavy metal pollution of cultivated soil under different data scenarios has operability and feasibility. This study can provide a theoretical basis and technical support for the sampling site layout method of heavy metal pollution monitoring in cultivated soil.

Key words: soil heavy metal, data scenarios, historical data of sampling sites, auxiliary data, sampling site layout

CLC Number:

WU Yanan, DONG Shiwei, PAN Yuchun, REN Xianpeng, WEI Xiangfeng, LI Xican, NIU Chong. Monitoring Site Layout Method for Heavy Metal Pollution of Cultivated Soil Under Different Data Scenarios[J]. Chinese Agricultural Science Bulletin, 2022, 38(22): 93-98.

Figures/Tables 2

References 25

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