No abstract

Glaciokarst is a landscape which combines karst features and hydrology as well as inherited glacial features. It is a result of glaciation upon a karst geomorphological system. The relationship between glaciers and karst is rather poorly known and inadequately recognized. This research focuses on three distinct karst areas along the Adriatic coast in the southern Dinaric Alps that were affected by the Quaternary glaciations. An insight into specific glaciokarst processes and surface features was provided through the study of the areas of the Lovćen, Orjen and Velež Mountains. A glaciokarst geomorphology is in general well preserved due to the prevailing vertically oriented chemical denudation following de-glaciation and almost the entire absence of other surface processes. Typical glacial erosional features are combined by a variety of depressions which are the result of a karstic drainage of sub-glacial waters. The majority of glacial deposits occur as extensive lateral-terminal moraine complexes, which are often dissected by smaller breach-lobe moraines on the external side of the ridge. Those moraine complexes are likely to be a product of several glacial events, which is supported by complex depositional structures. According to the type of glacial depositional features, the glaciers in the study areas were likely to have characteristics of moraine-dammed glaciers. Due to vertical drainage ice-marginal fluvial processes were unable to evacuate sediment. Fluvial transport between glacial and pro-glacial systems in karst areas is inefficient. Nevertheless, some sediment from the glacier margin is washed away by the pro-glacial streams, filling the karst depressions and forming piedmont-type poljes.

Izvleček UDK 911.2:551.435(497.471) Uroš Stepišnik & Gregor Kosec: Modeliranje pobočnih pro� cesov na krasu Članek obravnava modeliranje pobočnih procesov na krasu. Predstavljen je preprost enodimenzionalen fizikalni model preko katerega se oceni temeljno obnašanje pobočnih procesov. Model upošteva masno kontinuiteto prepereline ter mehanično in kemično preperevanje matične kamnine. Članek podrobneje obravnava oblikovanje pobočij pri različnih intenzivnostih prevladujočih procesov (mehansko in kemično preperevanje ter pobočni procesi). Uporabljen pristop predstavlja prvi korak k razumevanju pobočnih procesov, vendar ne vsebuje primerjav z realnimi terenskimi meritvami. Podatki pridobljeni s predstavljenim modelom kažejo dobro kvalitativno ujemanje s terenskimi opazovanji. Podrobneje so predstavljeni trije tipični primeri: primer prevladujočega mehanskega preperevanja, primer uravnoteženega mehanskega in kemičnega preperevanja ter primer prevladujočega kemičnega preperevanja.

Kraška polja so kotanje v krasu, ki so zelo pogoste zlasti na Dinarskem krasu. Kljub številnim skupnim značilnostim se pojavljajo v zelo različnih kraških okoljih in delujejo na različne načine. V raziskavi je predstavljena nova tipizacija kraških polj, ki poenostavlja dosedanje tipizacije. Polja opredeljuje glede na geomorfološko okolje, v katerem se pojavljajo, kot ojezerjena, prelivna, pritočna in predledeniška. V raziskavi smo na osnovi nove tipizacije opredelili vseh 35 kraških polj v Sloveniji.