Podzemna zgradba različnih tipov vrtač v Sloveniji : rezultati električne upornosti tomografije

Stefanovski, Sašo (author), Cof, Klemen (author), Ferk, Mateja (author), Verbovšek, Timotej (author), Stepišnik, Uroš (author)

Vrtače so značilne kraške oblike, a njihova podzemna zgradba ostaja slabo poznana. Raziskava z uporabo tomografije električne upornosti (ERT) proučuje povezavo med površinsko morfologijo in podzemno zgradbo štirih tipov vrtač v Sloveniji. Opravili smo 24 ERT meritev na dvanajstih vrtačah v štirih območjih: Kras (skledaste), Ko­čevski Rog (vodnjakaste), Logaško-Begunjski ravnik (lijakaste) in Loški Potok (po­dolgovate vrtače). Za vsako vrtačo smo izmerili dva med seboj pravokotna profila. Rezultati kažejo heterogenost: po obliki podobne vrtače na istem območju imajo raz­lično zgradbo, medtem ko so si vrtače z različnih območij lahko podobne. Pri treh vrtačah smo pod dnom zaznali navpične in subhorizontalne cone nizkih do srednjih upornosti, ki verjetno nakazujejo jamske rove, ki so zapolnjeni s sedimentom, kar kaže na različno morfogenezo analiziranih vrtač. Površinska oblika vrtače ne odraža neposredno njene podzemne zgradbe. Lokalni geološki in geomorfološki dejavniki ter morfodinamični procesi so tisti, ki najbolj vplivajo na obliko vrtač.

• Language: Slovenian
• Keywords: kras, geomorfologija krasa, sediment, morfogeneza, geofizika
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FF - Faculty of Arts; NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 01.01.2025
• Year: 2025
• Number of pages: Str. 5-56
• Numbering: [Št.] 64
• PID: 20.500.12556/RUL-180332
• UDC: 911.2:551.44(497.4)
• ISSN on article: 0354-0596
• DOI: 10.4312/dela.64.5-56
• COBISS.SI-ID: 269286147
• Publication date in RUL: 06.03.2026

Record is a part of a journal

• Title: Dela
• Publisher: Oddelek za geografijo Filozofske fakultete Univerze v Ljubljani, Oddelek za geografijo Filozofske fakultete Univerze v Ljubljani, Znanstvena založba Filozofske fakultete, Založba Univerze v Ljubljani
• ISSN: 0354-0596
• COBISS.SI-ID: 23805442

Licences

• License: CC BY-SA 4.0, Creative Commons Attribution-ShareAlike 4.0 International
• Link: http://creativecommons.org/licenses/by-sa/4.0/
• Description: This Creative Commons license is very similar to the regular Attribution license, but requires the release of all derivative works under this same license.

Secondary language

• Language: English
• Title: Subsurface structure of different doline types in Slovenia : results from electrical resistivity tomography

Abstract

Dolines are characteristic karst landforms, yet their subsurface structure remains insuffi-ciently understood. This study applies electrical resistivity tomography (ERT) to examine the link between surface morphology and subsurface structure of four doline types in Slovenia. We conducted 24 ERT surveys on twelve dolines in four areas: Kras (bowl-shaped), Kočevski Rog (well-shaped), Logatec–Begunje plain (funnel-shaped), and Loški Potok (elongated dolines). Two perpendicular profiles were measured per doline. Results reveal heterogeneity: morphologically similar dolines within one area displayed different subsurface structures, while morphologically different dolines across areas showed simi-larities. Three dolines contained vertical and subhorizontal low- to intermediate-resis-tivity zones beneath their floors, which likely indicate cave passages filled with sediment, suggesting varied morphogenesis of the analysed dolines. Doline surface form does not directly reflect their subsurface structure; local geological and geomorphological factors and morphodynamic processes have the strongest influence on doline development.

• Keywords: karst, karst geomorphology, sediment, morphogenesis, geophysics