Test of the maximum penetration depth of the Roteg GPR above the Hranice Abyss and in the Moravian Karst

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F20%3A43919468" target="_blank" >RIV/62156489:43210/20:43919468 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.5817/GVMS2020-13587" target="_blank" >https://doi.org/10.5817/GVMS2020-13587</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5817/GVMS2020-13587" target="_blank" >10.5817/GVMS2020-13587</a>

Result language

angličtina

Original language name

Test of the maximum penetration depth of the Roteg GPR above the Hranice Abyss and in the Moravian Karst

Original language description

A new kind of Ground Penetrating Radar (GPR), &quot;Roteg&quot;, was tested at generally known speleological sites in the Czech Republic. The first examined site - the Hranice Abyss located near the town Hranice - is the deepest underwater cave in the world. This GPR is characterised by much higher pulse power, antennas with rather high voltage (5-15 kV), and, in particular, the special design of the pulse generator. The radar survey near the Hranice Abyss has shown that it is possible to detect reflections of electromagnetic pulses coming from the speleogenic structures of the abyss itself and from lithological boundaries occurring below the water table - something which was not anticipated and was verified for the first time ever. Plausibly detectable reflections were detected from the depths of 580m below the surface - which is approximately 515m below the water level - using the longest available 6-metre antennas tuned to the frequency of 25 MHz. The second site tested was the quarry of Malá Dohoda near the municipality of Holštejn, the Moravian Karst, the Czech Republic. The GPR used was the same as above except the power output to the transmitting antenna which produced pulses of 20 kV. The radarogram showed cavities located at the depth of up to 300m, the layers on the boundary between Lažánky and Vilémovice members of limestone at the depth of 400m, basement sandstones and conglomerates at the depth of 600-700m, and granite rocks below this level. Both of the tests mentioned above confirmed the extraordinary big penetration depth of the GPR signal which exceeded 500m when using the maximum power on transmitting antennas.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20201 - Electrical and electronic engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Geologické výzkumy na Moravě a ve Slezsku

ISSN

1212-6209

e-ISSN

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Volume of the periodical

27

Issue of the periodical within the volume

1-2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

98-105

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85103333522