Integration of numerical models and geoinformatic techniques in the delimitation of a protection zone for the MGB 319 complex multi-aquifer system in southwest Poland
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Date
2015-09
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Instytut Geologii UAM
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Abstract
The study area, situated near the city of Wrocław in southwest Poland, is part of the hydrogeological system of the Qua-
ternary/Neogene MGB 319, inclusive of a buried valley of high water potential, named the Bogdaszowice structure.
This structure is an alternative source of water supply for the Wrocław city area. Numerical modelling is the most effec-
tive tool in establishing a groundwater protection strategy for Major Groundwater Basins (MGBs) in complex aquifer
systems. In the present study, the first step was to assess the hydrodynamic conditions of the Radakowice groundwater
intake by analyses of head contours, pathlines, average flow times and capture zones of particular wells. Subsequently,
these results were used in combination with other data and compiled as GIS layers. The spatial distribution of hydraulic
conductivity was based on the lithology of surface sediments. Other data sets such as the thickness of the unsaturated
zone, average soil moisture and infiltration rate were taken either directly from the model or were calculated. Based on
the input data obtained, vertical flow time calculations for every model cell were made. The final outcome is a map of
the protection zone for the aquifer system of the MGB 319.
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Keywords
numerical groundwater modelling, GIS, unsaturated zone, MGB, central Europe
Citation
Geologos, 2015, 21, 3. s.169-177
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ISBN
978-83-232187-4-6
ISSN
1426-8981