Dreidimensionale Darstellung zweidimensionaler Geoelektrik

Anja Kleebaum1
1 Abteilung Geologie, Universität Bayreuth

P 5.4 in Geophysikalische Methoden in der Hydrogeologie

Identifying and localizing geological structures in the subsurface is a scientific task with wide and diverse application potential. Electrical resistivity tomography is an efficient geophysical technique to investigate the spatial extent of such subsurface structures. Furthermore many scientific objectives in geology demand three-dimensional imaging.

3D electrical resistivity tomography provides a technique for surveying three-dimensional structures. Due to enormous amount of time and work load it has still not been established as a standard method. In most cases 2D electrical resistivity tomography is used to obtain two-dimensional subsurface profiles.

This study investigates the possibility of visualizing two-dimensional profiles in three dimensions. Therefore a software has been developed which uses GPS-coordinates for three-dimensional visualization.

The developed method is presented by a case study performed in the northern Franconian Jura. This area contains a filled sinkhole and therefore is of high hydrogeological interest. Sinkholes are in direct contact to karst water and there is no significant filtering or biological self-cleaning. Thus, knowledge of their location and structure is not just import to the danger of collapse but particularly to groundwater protection.

The intersecting profile lines of the 2D electrical resistivity tomography are investigated by the newly developed tool for testing the method.

Letzte Änderung 27.11.2013