HYDROGEOLOGICAL CONDITIONS OF OCCURRENCE OF CLAY INTERBED WITHIN VARAŽDIN AQUIFER

Abstract

Varaždinski vodonosnik zauzima krajnji zapadni dio heterogenih kvartarnih naslaga dravske doline. Šljunčani vodonosnik koristi se za potrebe vodoopskrbe većih naselja. Interpretacije strukture naslaga i hidrogeoloških odnosa ovog područja u zadnje vrijeme potaknuta su regionalnim problemima vodoopskrbe i zaštite izvorišta. Istraživanja su naročito usmjerena na glineni proslojak koji dijeli varaždinski vodonosnik na dva izolirana sloja šljunka. Provedena su geofizička mjerenja i izvedene su nove istraživačke bušotine. Ovim su istraživanjima došlo do novih spoznaja te omogućio detaljniji prikaz rasprostiranja glinenog proslojka.Varaždin aquifer is developed in the far western part of the heterogeneous Quaternary deposits in Drava basin. Water captured from this gravel aquifer is used for water supply of major cities. Recent regional problems of water supply and water source protection prompted new interpretations of the structure of deposits and hydrogeological relations in this area. Research has been focused especially on clay interbed that separates Varaždin aquifer in two isolated gravel layers. Geophysical measurements have been carried out followed by drilling of new exploration boreholes. These studies have shown new insights and enabled detailed display of clay interbed within Varaždin aquifer

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