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Review of the research and evolution of landslides in the hinterland of Koroška Bela settlement (NW Slovenia)
Tina Peternel, Ela Šegina, Jernej Jež, Mateja Jemec Auflič, Mitja Janža, Janko Logar, Matjaž Mikoš, Miloš Bavec, 2022, original scientific article

Abstract: This paper gives an overview of landslide research and the activity of landslides located above the Koroška Bela settlement in Northwest Slovenia. There are several landslides in this area and they pose a direct threat to the settlement below. The settlement is very densely populated (about 2,100 inhabitants) and has well-developed industry and infrastructure. It is built on deposits from past debris flows, indicating that large slope mass movements have occurred in the past. In this regard, the hinterland of Koroška Bela has been investigated since 2006, within the framework of various research, technical and European projects. The most extensive geological and geotechnical investigations were carried out after April 2017, when part of the Čikla landslide collapsed and mobilised into a debris flow. All of the investigations which have been carried out over the years revealed that the hinterland of Koroška Bela is characterised by high landslide activity due to geological, hydrogeological and tectonic conditions. In order to protect people and their property, it is essential to implement a holistic mitigation measure which includes remediation works (drainage works, debris flow breaker, etc.) and non-structural measures (monitoring system, early warning system, risk management, etc.). Regular and continuous monitoring of all landslides is also crucial to observe the landslide dynamics and evaluate the effectiveness of structural mitigation measures.
Keywords: landslide, debris flow, research, monitoring, landslide evolution, Koroška Bela
Published in DiRROS: 03.10.2022; Views: 140; Downloads: 32
.pdf Full text (11,09 MB)

Varstvo tal
Primož Simončič, other educational material

Keywords: nastanek tal, procesi v tleh, lastnosti tal, klasifikacija tal, funkcije tal, podnebne spremembe, monitoring tal, informacijski sistemi, zakonodaja
Published in DiRROS: 16.08.2022; Views: 141; Downloads: 0
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Odmrla biomasa in krajinska povezljivost kot podpora za določanj
Janez Pirnat, 2022, original scientific article

Abstract: V razpravi predstavljamo nov predlog ocene pestrostne funkcije gozdnih zaplat v kmetijski krajini. V raziskavi smo podrobno ocenili prisotnost odmrle lesne biomase v gozdni zaplati pri Nadgorici. Povprečna vrednost odmrle lesne biomase, izračunana iz 57 vzorčnih ploskev, je znašala 11,83 m3 /ha. Od šestih ploskev (torej nekako 10 % od vseh ploskev) izkazuje lesno zalogo odmrle lesne biomase več kot 25 m3 /ha, torej količino, ki v literaturi velja kot primer poudarjene pestrostne funkcije. Ugotovitve naše raziskave smo povezali še z ugotovitvami naših predhodnih raziskav in literature. Na podlagi vsega navedenega smo oblikovali predlog, da bi poudarjeno pestrostno funkcijo v kmetijski krajini imele zaplate z dovolj veliko količino odmrle lesne biomase (≥ 20 m3 /ha) z vsaj 200 ha velikim jedrom notranjega okolja in prostorskim razporedom, ki vzdržuje manj kot 2 km medsebojno oddaljenost med gozdnimi zaplatami oziroma okoliško gozdno matico.
Keywords: monitoring, odmrla biomasa, pestrostna funkcija gozda, povezljivost gozdnih zaplat, jedra notranjega okolja, Nadgorica
Published in DiRROS: 12.07.2022; Views: 217; Downloads: 84
.pdf Full text (303,09 KB)

Contrasting resource dynamics in mast years for European Beech and Oak - a continental scale analysis
Anita Nussbaumer, Arthur Gessler, Sue Benham, B. De Cinti, Sophia Etzold, Morten Ingerslev, Frank Jacob, François Lebourgeois, Tom Levanič, Hrvoje Marjanović, 2021, original scientific article

Abstract: Resource allocation to different plant tissues is likely to be affected by high investment into fruit production during mast years. However, there is a large knowledge gap concerning species-specific differences in resource dynamics. We investigated the influence of mast years on stem growth, leaf production, and leaf carbon (C), nitrogen (N), and phosphorus (P) concentrations and contents in Fagus sylvatica, Quercus petraea, and Q. robur at continental and climate region scales using long-term data from the International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests) and similar datasets. We discussed the results in the light of opposing resource dynamics hypotheses: (i) resource accumulation before mast years and exhaustion after mast years (resource storage hypothesis), (ii) shifting resources from vegetative to generative compartments (resource switching hypothesis), and (iii) investing resources concurrently in both vegetative and generative compartments (resource matching hypothesis). Linear mixed-effects modelling (LMM) showed that both stem growth and leaf production were negatively influenced by weather conditions which simultaneously lead to high fruit production. Thus, the impact of generative on vegetative growth is intermixed with effects of environmental factors. Superposed epoch analyses and LMM showed that for mast behaviour in F. sylvatica, there are indicators supporting the resource storage and the resource switching hypotheses. Before mast years, resources were accumulated, while during mast years resources switched from vegetative to generative tissues with reduced stem and leaf growth. For the Quercus species, stem growth was reduced after mast years, which supports the resource storage hypothesis. LMM showed that leaf C concentrations did not change with increasing fruit production in neither species. Leaf N and P concentrations increased in F. sylvatica, but not in Quercus species. Leaf N and P contents decreased with increasing fruit production in all species, as did leaf C content in F. sylvatica. Overall, our findings suggest different resource dynamics strategies in F. sylvatica and Quercus species, which might lead to differences in their adaptive capacity to a changing climate.
Keywords: climate change, Fagus sylvatica, long-term monitoring, mast fruiting, Quercus petraea, Quercus robur, resource dynamics
Published in DiRROS: 15.07.2021; Views: 531; Downloads: 380
.pdf Full text (7,63 MB)
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