3D characterisation of doline-cave coupling zone by using 3D laser scanning and electrical resistivity tomography

• DOI: 10.5194/icg2022-671
• Publication Date: 2022-06-20T13:56:23Z
• Authors: Mateja Breg Valjavec; Rok Ciglič; Jure Tičar; Špela Čonč; Stanka Šebela
• Keywords: Sinkhole; Electrical Resistivity Tomography

<p>Geoscience has been devoting increased attention to understanding the complex pathways and flows of material, energy, multidimensional coupling between various geological systems. This includes “concept connectivity”, which provides an overall framework better investigate hydrological So far, concept largely used for fluvial geomorphic systems, whereas we intend use it within karst system. In relation connectivity surface subsurface, hydrological, sediment, geochemical connectivities are most relevant from perspective geoscience measuring human impacts through a long time span.</p><p>Our main interest is study direct flow enclosed depressions (solution dolines) near-surface caves (50 m below surface) that prone influence. The doline-cave zone represents upper part aquifer specific characteristics dolines can be identified. Polina peč Cave (NW Dinaric Karst) was selected as case cave. We geoinformatic methods (three-dimensional (3D) laser scanning) available data (Registry maps, Lidar DEM 1x1m, optical remote sensing data), geomorphometric analyse, mapping surveying. With precise georeferencing (using GNSS system), placed 3D point cloud cave in geographical coordinate system, compared map with existing national aero-laser scanning – 1x1m), directly connected results were controlled further improved by geophysical (electrical resistivity tomography/ERT).</p>