Geostatistical modelling of heavy metal contamination in the topsoil of Guadiamar river margins (S Spain) using a stochastic simulation technique

摘要: Abstract This paper presents a methodology to evaluate and map environmental hazard characterize impact of heavy metals in Guadiamar river margins (South Spain) contaminated by the Aznalcollar mining spill. accounts for uncertainties mapping probability soil contamination with different is based on co-simulation technique using direct sequential simulation multivariate set variables. Each variable simulated primary data – metal concentrations secondary data, consisting previously one metals. Using several realizations set, “hazard” index was calculated each pixel study area, simultaneous proportions (joint probabilities) levels all Finally, intersection map, joint dispersion contaminants, ecosystems, resulted maps margins. The performances sets co-simulated variables were compared considering two extreme alternatives: i) considered need treatment if 5 simultaneously exceed their concentration limit value at same location; ii) least exceeds its location.