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Vrtače na pobočjih
Novljan, Živa (Author), Stepišnik, Uroš (Mentor) More about this mentor... This link opens in a new window

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Abstract
Vrtače so najbolj tipična in pogosta površinska oblika krasa zmernih geografskih širin. So kraške kotanje srednjih dimenzij, z bolj ali manj pravilnim krožnim obodom in konkavnim profilom, za katere je značilno, da je njihov premer večji od njihove globine. Pojavljanje in oblika vrtač sta odvisna od geoloških, podnebnih in hidroloških značilnosti ter značilnosti površja območja. V raziskavi smo preučevali gostoto pojavljanja vrtač in njihove morfometrične lastnosti v odvisnosti od naklona pobočja, na katerem se nahajajo. Raziskava je bila izvedena na treh območjih s primerljivimi reliefnimi, geološkimi, podnebnimi in hidrološkimi značilnostmi na visokih kraških planotah Hrušici in Snežniku ter Slavniškem pogorju. Vrtače so bile preučene na podlagi podatkov, pridobljenih z uporabo digitalnega modela višin s prostorsko ločljivostjo enega metra, izdelanega iz lidarskih podatkov, in obdelanih z uporabo GIS orodij. Ugotovili smo, da se vrtače pojavljajo na uravnoteženih pobočjih, njihova gostota pa je obratno sorazmerna z naklonom pobočja. Povprečna površina, obseg in dolžini osi so obratno sorazmerni, globina pa premo sorazmerna z naklonom pobočja. Asimetrija vrtač na pobočjih je bolj kot od naklona pobočja odvisna od geološke strukture.

Language:Slovenian
Keywords:kras, vrtače, pobočja, digitalni model višin, GIS, geomorfometrija
Work type:Master's thesis/paper (mb22)
Organization:FF - Faculty of Arts
Year:2019
Views:311
Downloads:128
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Secondary language

Language:English
Title:Dolines on slopes
Abstract:
Dolines are the most typical surface form on middle latitude karst. These moderate-sized karstic depressions with a more or less circular rim and concave profile typically have a greater diameter than depth. Their occurrence and form depend on the geological, climate and hydrological characteristics as well as the relief characteristics of the area. This research focuses on doline density and their morphometric characteristics in relation to the gradient of the slope on which they occur. It was conducted on three areas with comparable relief, geological, climate and hydrological circumstances on the high karstic plateaus of Hrušica and Snežnik as well as on the Slavnik hill range. The dolines were studied on the basis of data acquired through a digital elevation model with a 1-meter spatial resolution, derived from lidar data, and processed with GIS tools. We have found that dolines occur on balanced slopes and that their density is inversely proportional to slope inclination. The same goes for the average area, perimeter and length of the axes of the dolines, while their depth is directly proportional to slope inclination. The asymmetry of the dolines depends more on the geological structure than on the slope inclination.

Keywords:karst, dolines, slopes, digital elevation model, GIS, geomorphometry

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