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Zmienność chemizmu wód podziemnych na obszarze Łodzi

100%

Ziułkiewicz M.

tom Vol. 51, nr 4

327-336

This papers presents a picture of chemical variability of groundwaters in a region of high anthropogenic pollution, around the city of Łódź. The research as conducted in three groups of wells, all representing aquifres of potable waters within the Łódź hydrogeological basin. Two groups of wells chosen within the city area and one outside it, in a rural area. Research showed that the Łódź hydrogeological basin were presents the inversion type, regarding mineralization and chemical composition of water. Within Cainozoic rocks, inversion is caused by anthropopression, but in deeper aquifers geogenic processes play a domiant role. The same pattern of conditions varies also horizontally in each aquifer. Ca, Mg, Na and CI ions are of greater importance in the group of indicators ofhydrochemical variability of groundwaters. These elements have connection with pollution processes of groundwaters, visible in changes of hardness and salinity. Hydrochemical changes are also indicated by NO2 and NH4

Stan chemiczny wód podziemnych aglomeracji łódzkiej

51%

Małecki J. J. , Porowska D. , Styrkowiec E. , Ziułkiewicz M.

tom Vol. 65, nr 11/2

1329--1333

The article identifies the hydrogeochemical environments controlling the chemical composition of groundwater in the Lódź agglomeration. The study was conducted with a different position of the groundwater table within: the Quaternary, Upper- and Lower Cretaceous aquifers. These aquifers are continuously exploited from a long time till present. The papers focuses on geogenic factors resulting from geological construction, lithology, circulation in the Lódź basin and anthropogenic factors associated with the change of the circulation system and the potential migration of pollution from the surface. The chemical composition of water from the Quaternary, Upper- and Lower Cretaceous aquifers was stable, without any anthropogenic changes. The hydrochemical inversion of water within the Cretaceous aquifers is the result of the different lithology of these aquifers and the variation in the way and magnitude of groundwater recharge.