Postojna and Planina Caves

“Ground penetrating radar (GPR) Roteg gave very promising results for the karst area between Postojna and Planina Caves in Slovenia. More unknown karst voids filled with water or dry caves were found at different depths and even at depths > 150 m. Field measurements above known caves (as Jama na poti) confirmed already existing speleological data. I think this is an important field method for detection of karst caves and can be used on different lithology and karst morphologies.”

Dr. Stanka Šebela
Geologist
ZRC SAZU Karst Research Institute
Postojna, Slovenia

“We were surprised by comfort of measurement, and also by speed and accuracy of the data recording. The GPR Roteg is a huge benefit for the prospection of karstic caves. GPR Roteg’s main advantage is in surface cave prospection with its unprecendented ability to discover areas hidden behind the vertical walls, above ceilings and below the bottom of the cave. The device is able to distinguish cavities filled with debris, sediments, sinter crusts, water and what is of particular interest to us, air.” (Reference Ostrovská)

Filip Doležal
Chairman of ZO 6-16 Tartarus
Czech Speleological Society
Ostrov u Macochy, Czech Republic

“Summarizing, the demonstration of the Roteg equipment in a practical geologic-geophysical project was absolutely convincing. And with regard to many other applications for deep­-seated targets (e.g., deep karst and penetration depths of the order of 50 – 100 m) pointed out and shown to me by Rudolf Tengler, it doesn’t take much to see a very effective Roteg in promising and strong competition to reflection seismics for at least this depth range.” (Tüttensee testimony)

Prof. Dr. Kord Ernstson
Geophysicist
Höchberg, Germany

“The Roteg ground penetrating radar (GPR) was tested in the Czech Republic above the Hranická abyss. The reflections of known ceilings of Lift I and Lift II at the depths of 120 m and 230 m below the surface were clearly detected. The GPR Roteg is a much better piece of equipment than other known geophysical apparatuses.”

RNDr. Pavel Kalenda, CSc.
Geophysicist
IRSM CAS
Prague, Czech Republic