Using hydrodynamic modelling to assess the impact of the development on hydrogeological conditions in a polygenic river valley marginal zone

Abstract Using hydrodynamic modelling to assess the impact of the development on hydrogeological conditions in a polygenic river valley marginal zone. The study area is located in the southern part of the Warsaw city agglomeration, adjacent to the Chojnowski Landscape Park. The study area is situated in the boundary zone between: (1) the bottom of the river valley reach with peat cover and (2) the Pleistocene glaciofluvial plain on its lower level. The main aim of the study is the analysis of the investment impact on hydrogeological conditions. During the pre-construction site works on the bottom of the valley it was an earthwork constructed in order to extend the zone of the buildings in the valley area. The research method consists of field works (geological drillings, piezometers constructions and observations, geodetic measurements), as well as laboratory works (sieve analysis) and hydrodynamic modelling (Visual MODFLOW, version 2009.1). The hydrogeological model performed in the study seems to became a base for the concept of the restoration of groundwater conditions.

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