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Table 5 The importance of different environmental factors on the distribution of heavy metals

From: Spatial heterogeneity analysis and source identification of heavy metals in soil: a case study of Chongqing, Southwest China

Influencing factor

As

Cu

Mn

Traffic activity

− 0.006

0.004

0.005

Industrial activity

0.006

0.072

0.080

Air quality

0.101

0

0.110

Soil parent material

− 0.065

0.207

0.201

Slope

0.177

0.002

0.206

Population density

0.069

0.539

0.163

Soil type

0.236

− 0.017

0.066

NDVI

0.030

0.015

0.136

Water environment

0.453

0.178

0.034

  1. NDVI Normalized Difference Vegetation Index