QUANTIFICATION OF HYDROGEOLOGICAL PARAMETERS BY GEOPHYSICAL METHODS

Within hydrogeological exploration, geophysical methods have a significant role in solving following problems:- possibilities of safe analyses of aquifer geometry and structural properties;- monitoring of aquifer contamination by mineral and organic deposits;- defining relevant indications on a hanging-wail permeability characteristics and aquifer hydrodinamic parameters;- indicating groundwater level;- analysis of groundwater chemistry;- detemiining day facli in a complex of hanging-wail sediments;- exploration of velocity transfer for Wet front and pollutant within. According to regional geophysical exploration, the basis for: regional measures for water resources utilization and protection planning and production, space plan production, identi1ying safe zones for hazardous waste placement, distinguishing zones where groundwaters are not protected and for which the propbylactic protective measures have to be planned, etc. Detailed geophysical investigations on overburden sediments are significant in connection with drawing up plans for industrial, agncultural and other objectives. As a case history, an area of Djerdap reservoir on the Danube nver (Serbia, Yugoslavia) is presented. Namely, complex geophysical exploration has been done in order to prevent and moderate a harmful influence of the performed reservoir on the environment (increased groundwater mfiltration from the reservoir into surrounding rocks, permanent groundwater level raising, etc.). In that sense, a hydrogeophysical investigation was useful in delineation of the aquifer, obtainment of appropriate parameters (groundwater level, groundwater chemistry