Atanas Rusev, Tanya Slavova

Geophysical methods of cave detection have, to date, reaped few positive results in finding new caves. As Atanas Rusev and Tanya Slavova report, however, this isn't inevitable. Here they describe cave detection, using ground-penetrating radar, magnetometry, gravimetry and infrared imaging, and illustrate the techniques with case studies showing the discovery of new caves and entrances.

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The article is available only in Bulgarian HERE.

Tanya Slavova & Atanas Rusev

Caves are important for a wide variety of work fields, ranging from construction engineering to mineral exploration and archaeology. Despite their scientific importance, geologists expect that only a relatively small number of caves have been discovered so far. Current exploration efforts are mainly done by speleologists, but this is a time-consuming activity and limited to exploration based on existing surface openings. The authors of this article show that the combination of multiple geophysical techniques provides an easier and effective on-surface exploration method that meets the challenges of complex karst environments.

GIM INTERNATIONAL Magazine, Issue 3, March 2016

Abstract of Dissertation

Tanya Slavova

Both natural and man-made underground cavities are features that could give the answers to variety of questions. This dissertation is dedicated to both colleagues in geodesy and a broad range of other scientists and explorers. The results are of interest for specialists in speleology, geology, geomorphology, hydrogeology, mineralogy, biology, archeology, etc., and that is what defines the multidisciplinary significance of the problem.

It is available only in Bulgarian however the language of photography gives a glimpse on the field work. Although it took about a month, it marked my dissertation. And it wouldn't be possible without the support of my friends, some mentors and organisations - some help that I greatly appreciate.

PS The abstract (in Bulgarian) can be found HERE.

Atanas Rusev, Tanya Slavova, Rangel Gyurov

Duhlata cave is the longest (18 km in length) cave in Bulgaria, located in Bosnek karst area. Its 8 underground rivers flow is several times less than the surface springs flow, and probably more underground rivers and cave galleries are still undiscovered. For many years in Pepeliankata cave, located nearby, have been made attempts to discover its lower levels and to penetrate in new cave galleries and underground rivers that also stems from the same springs. Ground Penetrating Radar is used, for the first time in Bulgaria, to locate new cave entrances and galleries close to the surface, nearby Peleiankata Cave. Several possible new cave entrances and a cave room were located after analyzing results from the GPR’s radagrams.

Balkan Speleological Conference, Sofia, 2014

Tanya Slavova, Atanas Rusev, Asparuh Kamburov

This article is available only in Bulgarian HERE.

Tanya Slavova

The article is available only in Bulgarian HERE.

Tanya Slavova

Gravimetric methods are based on the natural gravity field of Earth. Measuring it with high accuracy and resolution makes it possible to resolve a variety of issues - from fundamental problems to tasks of small scale but large significance. Technological progress during the last decades have also expanded the applications, and the principle, which gravimetric methods are based on, confirmed their applicability for certain targets.

Cavities are features with typically high density contrast to the surrounding rock. On one hand, their detection is a classical gravimetric task. On the other hand, exploring their exact location, shape and size is an important issue for engineering, various sciences and ecology.