Koro{ka Bela alluvial fan – The result of the catastrophic slope events;Karavanke Mountains, NW Slovenia)

Jež, Jernej; Mikoš, Matjaž; Trajanova, Mirka; Kumelj, Špela; Budkovič, Tomaž; Bavec, Miloš

doi:10.5474/geologija.2008.022

Cited by 25 publications

(21 citation statements)

References 3 publications

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“…Vajnež (2099 m), in the hinterland of the settlement of Koroška Bela. In the past, Koroška Bela was already heavily damaged by a debris flow event [70,71], and the risk still exists [72,73].…”

Section: Study Areamentioning

confidence: 99%

“…The Urbas landslide consists of: tectonically deformed black shaley mudstone, siltstone, sandstone and conglomerate; black massive limestone; and vast accumulations of limestone scree that is deposited over all of them. The depth of the landslide is estimated at between 5 and 20 m (14 m) [72,73]. The main body of the landslide is characterized by complex dynamics and is presumed to be a slow-motion slip.…”

Section: Study Areamentioning

confidence: 99%

“…Another limitation was the inaccuracy of the GNSS receiver under the tree canopy, as the collected location of a single tree could be off by more than a meter. Another explanation for the similarity in Ei between magnitude zones could be attributed to a combination of the deep-seated character of the landslide (around 15 m) [71][72][73][74] and the plate-root system of P. abies. The plate-root system is typically shallow and was observed to record less GD compared to the heart-root system, which is typically deeper and expected to suffer more damage because it reaches the slip surface after landslide initiation [85].…”

Section: Landslide Activity Within Zonesmentioning

confidence: 99%

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Reconstruction of Landslide Activity Using Dendrogeomorphological Analysis in the Karavanke Mountains in NW Slovenia

Oven

Levanič

Jež

et al. 2019

Forests

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Tree ring eccentricity was used to reconstruct landslide activity in the last 138 years in the Urbas landslide located at Potoška planina in the NW part of the Karavanke Mountains, Slovenia. The research was based on the dendrochronological sampling of Norway spruce (Picea abies (L.) Karst.) in areas of varying landslide intensity. Analysis of a sudden change in the eccentricity index of 82 curved trees concluded that there were 139 growth disturbances and 16 landslide reactivations between 1880 and 2015, with a landslide return period of 8.5 years. Using lidar data, changes in the surface of the digital terrain model (DTM) were compared with changes in the eccentricity index of trees at the same location in the period 2014–2017. On the basis of temporal changes in the eccentricity index and by using spatial interpolation, landslide activity was reconstructed for the period 1943–2015. During this period, landslide intensity increased in the central part of the landslide. Although categorization into seven categories of different stem curvature was proposed, no distinction between categories with respect to their eccentricity index was found.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Landslide Activity Within Zonesmentioning

confidence: 99%

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Reconstruction of Landslide Activity Using Dendrogeomorphological Analysis in the Karavanke Mountains in NW Slovenia

Oven

Levanič

Jež

et al. 2019

Forests

Self Cite

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“…The area of Koroška Bela settlement in NW Slovenia has experienced severe debris-flow events in the past and a big part of the settlement is even built on an alluvial fan of past debris flows (Jež et al, 2008). Due to the geological, tectonic and hydrogeological conditions, the area above the settlement is highly prone to different slope mass movements, posing a high risk for the safety of the settlement .…”

Section: Introductionmentioning

confidence: 99%

“…Due to the geological, tectonic and hydrogeological conditions, the area above the settlement is highly prone to different slope mass movements, posing a high risk for the safety of the settlement . To assess the risk of mass movements and provide supportive information for the planning of safety measures for the protection of the settlement, various series of geological (Jež et al, 2008), engineering (Peternel et al, 2018), geophysical, geomechanical, geomorphological, geodetic, and hydrogeological investigations were performed (Peternel et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Hydrogeological investigation of landslides Urbas and Čikla above the settlement of Koroška Bela (NW Slovenia)

Janža¹,

Serianz²,

Šram³

et al. 2018

Geologija

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The area above the settlement of Koroška Bela is highly prone to slope mass movements and poses a high risk for the safety of the settlement. To get an insight into the hydrogeological conditions and processes which can affect mass movements in this area, hydrogeological investigations, including hydrogeological mapping, discharge measurements of springs, performance of infiltrometer and slug tests were performed. The results of these investigations show complex and heterogeneous hydrogeological conditions, predisposed by geological and tectonic setting and active mass movements which cannot be uniformly described. Observed large fluctuations in the rate of discharge of springs and groundwater level in observation wells are highly dependent on meteorological conditions. Estimated hydraulic conductivity of the soil is relatively high (2×10 -4 m/s) and reflects the loose structure and high content of organic matter in the upper part of the forest soil. Hydraulic conductivity of more permeable sections of boreholes is in general higher in the upper parts, in predominantly gravel layers (in range from 2×10 -3 to 1×10 -5 m/s), than in the deeper clayey gravel parts (3×10 -5 to 1×10 -7 m/s). In the area of the Čikla landslide the average hydraulic conductivity is estimated at 8.99×10 -4 m/s and is higher than in the area of the Urbas landslide (3.05×10 -4 m/s). IzvlečekNa območju nad naseljem Koroška Bela je velika nevarnost nastanka pobočnih masnih premikov, kar predstavlja tveganje za varnost naselja. Za razumevanje hidrogeoloških pogojev in procesov, ki lahko vplivajo na masne premike na tem območju, so bile izvedene hidrogeološke raziskave, ki so vključevale hidrogeološko kartiranje, meritve pretokov izvirov ter izvedbo infiltrometrskih in nalivalnih preizkusov. Rezultati raziskav kažejo zapletene in heterogene hidrogeološke razmere, pogojene z geološkimi in tektonskimi značilnostmi širšega območja ter aktivnimi masnimi premiki, ki jih ni mogoče enoznačno opisati. Opazovana velika nihanja pretokov izvirov in gladine podzemne vode v opazovalnih vrtinah so močno odvisna od meteoroloških razmer. Ocenjeni koeficient prepustnosti tal je relativno visok (2×10 -4 m/s) in odraža rahla tla z visoko vsebnostjo organske snovi, ki so značilna za gozd. Koeficient prepustnosti bolje prepustnih odsekov vrtin je v splošnem višji v zgornjih delih, v plasteh s prevladujočim gruščem (v razponu med 2×10 -3 in 1×10 -5 m/s), kot v globljih delih vrtin, v zaglinjenih plasteh (med 3×10 -5 in 1×10 -7 m/s). Na območju plazu Čikla je ocenjen povprečni koeficient prepustnosti 8.99×10 -4 m/s in je višji kot na območju plazu Urbas (3.05×10 -4 m/s). GEOLOGIJA 61/2, 191-203, Ljubljana 2018

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Natural Hazards in Slovenia

Komac¹,

Ferk²,

Pipan³

et al. 2019

World Regional Geography Book Series

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Koro{ka Bela alluvial fan – The result of the catastrophic slope events;Karavanke Mountains, NW Slovenia)

Cited by 25 publications

References 3 publications

Reconstruction of Landslide Activity Using Dendrogeomorphological Analysis in the Karavanke Mountains in NW Slovenia

Reconstruction of Landslide Activity Using Dendrogeomorphological Analysis in the Karavanke Mountains in NW Slovenia

Hydrogeological investigation of landslides Urbas and Čikla above the settlement of Koroška Bela (NW Slovenia)

Natural Hazards in Slovenia

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