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Table 2 The theoretical model and related parameters of heavy metal concentration in soil

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

Element

Theoretical model

C0

C+C0

C0/(C+C0)

A(m)

R2

Residuals

As

Gaussian

0.023

0.230

0.100

62.400

0.988

1.200E-04

Cu

Exponential

0.066

0.150

0.437

2523.000

0.921

1.642E-04

Mn

Gaussian

0.0001

0.088

0.001

57.200

0.921

1.572E-04