PROBLEMY PROSPEKCJI GEOFIZYCZNEJ PRZY WYZNACZANIU WYSTĘPOWANIA I GRANIC STRUKTUR HYDROGEOLOGICZNYCH DOLIN KOPALNYCH METODĄ ELEKTROOPOROWĄ

Abstract

GEOPHYSICAL PROSPECTION PROBLEMS IN DETERMINING THE PRESENCE AND BOUNDARIES OF HYDROGEOLOGICAL STRUCTURES OF BURIED VALLEYS GEOELECTRIC METHOD

Abstract. The article discusses the possibility of the use of geophysical – resistivity research in hydrogeology concerning the recognition of the hydrogeological structures of buried valleys. Further, the organization of fieldworks and the interpretation of electroresistance penetrations were presented on the examples of hydrogeological structures of buried valleys in the Wielkopolska region. The article presents the results of geoelectrical modeling and their visualization obtained by means of the available methods of interpretation in determining the ranges and boundaries of aquifers for the location of boreholes for groundwater capture. The results of the interpretation of geoelectrical soundings show dimensional variation of resistance deposit within the Quaternary in the Wielkopolska region. In southern Wielkopolska (region of Bartoszewice and region of Sowiny) the resistance of watered sandy – gravel deposits of the older Pleistocene (46–80 Ωm) show little difference from till-mud deposits (18–47 Ωm). However, in northern Wielkopolska (region of Adolfowo–Konstantynowo–Zacharzyn) these deposits are more diverse, with the resistance for watered sandy-gravel deposits from 79 to 1838 Ωm and till-mud deposits from 40 to 205 Ωm.