Szukana fraza: [Abstract = "The contamination of iron and calcium in the ground surrounding post\-mining acidotrophic reservoir located In Łuk Mużakowski \(Poland\) is presented. The reservoir under discussion was the biggest one in the antropogenic lake district and was a meromictic type. The migration of cal\-cium and iron to the reservoir caused by surface erosion and chemical weathering was pointed. The migration scheme was similar for both elements was strong correlated with the ground configuration."]