Application of Integrated Land Use Regression and Geographic Information Systems for Modeling the Spatial Distribution of Chromium in Agricultural Topsoil

Meng Cao, Daoyuan Wang, Yichun Qian, Ruyue Yu, Aizhong Ding and Yuanfang Huang ()
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Meng Cao: China International Engineering Consulting Corporation, Beijing 100048, China
Daoyuan Wang: Department of Environmental Science and Engineering, Shanghai University, Shanghai 200444, China
Yichun Qian: China International Engineering Consulting Corporation, Beijing 100048, China
Ruyue Yu: College of Land Science and Technology, China Agricultural University, Beijing 100193, China
Aizhong Ding: College of Water Sciences, Beijing Normal University, Beijing 100875, China
Yuanfang Huang: College of Land Science and Technology, China Agricultural University, Beijing 100193, China

Sustainability, 2024, vol. 16, issue 13, 1-15

Abstract: Chromium (Cr) contamination is widely distributed in agricultural soil and poses a threat to agricultural sustainability. Developing integrated models based on soil survey data can be an effective measure to accurately predict the spatial distribution of Cr. Focused on an agriculturally dominated area, this study presents a novel hybrid mapping model that combines land use regression (LUR) and geostatistical methods to predict Cr distribution in topsoil and examines the influence of various influencing factors on Cr content. The LUR model was first adopted to screen the influencing factors for Cr predictions. Then LUR, was combined with ordinary Kriging (OK_LUR) and geographically weighted regression Kriging (GWRK_LUR) to describe the spatial distribution of Cr. Results showed that Cr distribution was profoundly influenced by soil Cu and Zn content, the distance between the soil sampling and livestock farm, orchard areas within 100 m, and population density within 1000 m. The developed GWRK_LUR model significantly improved the prediction accuracy of the OK_LUR and LUR models (by 9% and 16%, respectively). This model provides a novel route to account for the spatial distribution of Cr in agricultural topsoil at a regional scale, which has potential application in pollution remediation.

Keywords: chromium; land use regression; geographically weighted regression Kriging; spatial distribution; agricultural sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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