Tab. 3 Parameters of arsenic and cadmium maps

Linear regression model + interpolation of residuals As
annual average		 Cd
annual average
rural areas cities whole map
c (constant) -0.9 1.5  
a1 (rural map of PM10) 0.13 1.27  
range [km] 80 40 15
nugget 0 0 0
partial sill 0.2 1.6 1.6
RMSE [µg.m-3] 0.4 0.9 0.4
relat. RMSE [%] 29 47 86

 

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