APPLICATION OF GEOCHEMICAL MODELLING IN ASSESSING GROUNDWATER CHEMISTRY EVOLUTION IN THE GLIWICE ŁABĘDY INTAKE AREA
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2011, Vol 445, Issue 445
Abstract
Paper presents results of spatial and temporal analysis of groundwater chemistry in Triassic fractured-karst-porous aquifer in the area of Gliwice Łabędy well field for the years 1995–2010. Outcome of geochemical modelling was also described as a tool for quantitative assessment of geochemical processes active in that part of the carbonate aquifer. Spatial heterogeneity of groundwater chemistry within the study area is manifested mainly by higher mineralization and concentrations of major ions west of the trough filled with Miocene evaporite deposits, what reflects significant impact of Miocene sediments on the groundwater chemistry. Major processes controlling chemical composition of groundwater within the study area are dissolution of carbonates and evaporites, sulfides oxidation and denitrification. Redox processes play an important role particularly in the agricultural area where elevated concentrations of nitrates where observed. Geochemical modelling with Phreeqc allowed the authors to distinguish sources of sulphates in groundwater (sulphides oxidation and gypsum dissolution) in different parts of the investigated aquifer.
Authors and Affiliations
Sabina JAKÓBCZYK, Andrzej KOWALCZYK
Keywords
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