INFLUENCE OF LEGRAD THRESHOLD STRUCTURE ON HYDROGEOLOGICAL CHARACTERISTICS IN KOPRIVNICA AREA

Koprivni ka Podravina area in structural sense belongs to structural unit of Drava basin. Special role in research area has structure of Legrad which is formed along Ludbreg-Nagykanizsa fault, and together with Drava fault as dominant structure in formation of Drava basin, represent most important structure in area. This is specially important when observing hydraulic characteristics of main well field in Koprivnica area-Ivan ak and Lipovec. Both of them are formated in quternary deposits, but have very different hydraulic and spatial characteristics. Intensive movement along structures has also dominant influence on sedimantation conditions, and consequently to groundwater quality.