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Pobočni procesi na območju Grivč pri Ajdovščini
Pucihar, Blaž (Author), Verbovšek, Timotej (Mentor) More about this mentor... This link opens in a new window

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Abstract
Območje nad Grivčami pri Ajdovščini se nahaja v Vipavski dolini na južnem robu Trnovskega gozda. Zaradi narivnega roba mezozojskih karbonatov na eocenski fliš se v večjem obsegu in številu pojavljajo manjši in večji plazovi. Zaradi strmih karbonatnih sten, ki so zelo dovzetne za preperevanje, se grušč nabira na flišnih plasteh, ki ob porušitvi trdnosti splazi. Raziskovalno delo je osredotočeno na pobočne procese nad Grivčami, ki so obdani z večjimi plazovi, zato njihovo razsežnost označujemo za manjšo. Za lažjo analizo površja, ki je prekrito z mlajšimi sedimenti in poraščen z vegetacijo, so uporabljeni digitalni modeli višin, pridobljeni iz lidarskih podatkov. Nad Grivčami se nahaja pet različno velikih splazelih teles, kjer je sediment sprijet v brečo. Habič (1968) za območje severno od Ajdovščine pravi, da so bile splazele mase zlepljene že pred plazenjem, zato premike uvrščam med translacijske zdrse. Plazove, ki ne kažejo nadaljnjih premikov, imenujem fosilni kamninski plazovi. Zaradi prekrivanja z mlajšim gruščem ter zaraščenega terena so meje zakrite, zato ni popolnoma jasno, ali so dogodki povezani in gre za en večji dogodek, ali je prišlo do več manjših plazov. Pod splazelimi telesi Stare babe in Gradiške gmajne so večji bloki breče, ki pod Gradiško gmajno segajo do reke Hubelj, pod Staro babo pa so bloki odvaljeni vse do vasice Grivče. Bloki so lahko posledica kasnejšega razpadanja plazov ali pa gre za istočasen dogodek ob translacijskih zdrsih.

Language:Slovenian
Keywords:Grivče, Ajdovščina, pobočni procesi, fosilni plaz
Work type:Final paper (mb12)
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2019
COBISS.SI-ID:1524574 This link opens in a new window
Views:471
Downloads:227
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Secondary language

Language:English
Title:Slope processes in Grivče area
Abstract:
The area above Grivče is located in Vipava Valley near Ajdovščina, on the south edge of the Trnovo forest. Due to Mesozoic carbonates overthrusting Eocene flysch, there is a higher frequency of landslides in this area. The steep carbonate walls are very susceptible to weather conditions, resulting in scree accumulating on top of the flysch layers. This paper is focused on studying the slope processes above Grivče. Digital elevation models, extracted from LiDAR data, were used for the analysis of the slopes. There are five sedimentary bodies of different sizes, located over the slopes above Grivče. Habič (1968) noted, that the sedimentary bodies in the area above Ajdovščina were already constituted before sliding, therefore these movements are translational slidings, and the landslides that don't show any further movements are fossil landslides. Because of the vegetation and scree, that cover the landslides, there are no clear boundaries between them, therefore we can not determine whether these landslides happened as a consequence of one big event or as independent events. Under the sedimentary bodies Stara baba and Gradiška gmajna there are large blocks of breccia. The blocks under Gradiška gmajna and Stara baba are reaching river Hubelj and village Grivče, respectively. Both can be classified as a direct consequence of break down of the landslides or as a parallel event to the translational slides.

Keywords:Grivče, Ajdovščina, slope processes, fossil landslide

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