1. Surveillance of the banks of reservoirs on the Drava River in Slovenia after extensive floodsPavel Žvanut, 2022, objavljeni znanstveni prispevek na konferenci Povzetek: The Slovenian section of the Drava River is 133 km long, and over this distance it has a descent of 148 m. Eight HPPs are located on this section (six directly in the river course, whereas the other two in derivation channels of the river). Ten concrete gravity dams, with a structural height between 17 and 54 m, created eight reservoirs. In addition to their main use for electricity generation, reservoirs are also used for floods mitigation, irrigation, industrial water use and recreation. At the beginning of November 2012, extremely high flows of the Drava River, which exceeded 100-year flood, caused floods in the middle and lower reaches of the river. Extraordinary visual geotechnical inspections of the banks, in order to determine any instability of them, were carried out immediately after this event. Numerous landslides and landslips were identified, as well as damage to nearby buildings, but also damage and threat to transport infrastructure. Damaged banks of reservoirs and damaged infrastructure were instantly rehabilitated. In the future, it is necessary to perform regular and extraordinary surveillance of the banks of reservoirs, drawing attention to damage that needs immediate rehabilitation, thus preventing the occurrence of eventual disastrous consequences.
Ključne besede: concrete dams, Drava river, reservoirs, derivation channels, extreme events, extensive floods, extraordinary visual inspection, Formin HPP, levee breach, great damage
Objavljeno v DiRROS: 06.02.2024; Ogledov: 148; Prenosov: 60
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2. Forest managers’ perspectives on environmental changes in the biosphere reserve Mura-Drava-DanubeMarcus Sallmannshofer, Rok Damjanić, Harald Vacik, Marjana Westergren, Tjaša Baloh, Gregor Božič, Mladen Ivanković, Gyula Kovács, Miran Lanšćak, Katharina Lapin, Laszlo Nagy, Silvija Krajter Ostoić, Saša Orlović, Srđan Stojnić, Peter Železnik, Milica Zlatković, Silvio Schueler, 2023, izvirni znanstveni članek Povzetek: Riparian forests are particularly vulnerable to environmental change and anthropogenic influences because they are highly dynamic ecosystems, thus proper adaptation measures are crucial. The implementation of these measures, however, strongly depends on the actors’ perceptions of the specific problems occurring in such forests. For understanding the constraints of specific interest groups toward different adaptation activities, information in this field is essential. By conducting a questionnaire survey we explore how different types of forest managers, i.e., forestry professionals, forest owners, and conservation managers, perceive the effects of environmental change on forest management in the recently established Transboundary Biosphere Reserve Mura-Drava-Danube. We show that these forest managers are highly aware of ongoing environmental changes and appraise deteriorating forest conditions, especially after observing changes themselves. Abiotic damage is expected to increase the most, followed by biotic damage, the spread of non-native species, and tree dieback. Nearly 80% of the survey respondents expect further changes and almost all of them intend to adapt their management of forests to mitigate or prepare for these changes. Nevertheless, we show differences in sensitivity to change and willingness to initiate adaptation actions by assessing adaptation thresholds: conservation managers appear generally more tolerant to changes, which results in higher thresholds to initiate management adaptation than forestry professionals
Ključne besede: biosphere reserve Mura-Drava-Danube, forest management, sensitivity to environmental change, stakeholder perception, adaptation thresholds, riparian forest tree species
Objavljeno v DiRROS: 31.05.2023; Ogledov: 343; Prenosov: 267
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4. ZaDravo : projektna naloga - sklop BGregor Božič, 2022, končno poročilo o rezultatih raziskav Ključne besede: smernice, dolgoročna revitalizacija, gozdni habitatni tip, HT91E0*, gozdni reprodukcijski material, Drava, Slovenija, poročila
Objavljeno v DiRROS: 16.12.2022; Ogledov: 459; Prenosov: 129
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5. ZaDravo : projektna naloga - sklop BGregor Božič, Andreja Ferreira, Marko Bajc, Marjana Westergren, 2022, končno poročilo o rezultatih raziskav Ključne besede: beli topol, evropski črni topol, genski sklad, izbira drevesa, lokacija, spol, vrstna čistost, genetski označevalci, oblika lista, Drava, Slovenija, poročila
Objavljeno v DiRROS: 16.12.2022; Ogledov: 458; Prenosov: 237
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6. ZaDravo : projektna naloga - sklop BGregor Božič, 2022, elaborat, predštudija, študija Ključne besede: beli topol, evropski črni topol, gozdna genska banka, in-situ, ex-situ, gozdni reprodukcijski material, proizvodnja sadik iz semena, tehnične smernice, Drava, Slovenija, poročila
Objavljeno v DiRROS: 16.12.2022; Ogledov: 469; Prenosov: 121
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7. River distance, stand basal area, and climatic conditions are the main drivers influencing lying deadwood in riparian forestsJanine Oettel, Martin Braun, Marcus Sallmannshofer, Maarten De Groot, Silvio Schueler, Charlotte Virgillito, Marjana Westergren, Gregor Božič, Laszlo Nagy, Srdjan Stojnić, Katharina Lapin, 2022, izvirni znanstveni članek Povzetek: Riparian forests are among the most diverse terrestrial ecosystems, yet their biodiversity is increasingly threatened by habitat degradation, climate change, river regulation and invasive species. We investigated deadwood, widely recognized as an indicator for forest biodiversity, in riparian forests of the Mura-Drava-Danube Transboundary Biosphere Reserve. The Biosphere Reserve is a conservation area that spans five countries and three rivers located in south-eastern Europe. In detail, we analyzed the drivers of lying deadwood volume, occurrence and decay related to floodplain type, silvicultural management, and climatic conditions using regression models. Lying deadwood occurrence and volume significantly decreased as distance from the river edge increased, indicating that river dynamics likely play a role in deadwood accumulation in riparian forests. Deadwood volume was also positively influenced by stand basal area, a parameter that can be directly addressed by silvicultural management. Deadwood decay was affected positively by temperature and negatively by precipitation, highlighting the importance of climatic conditions on decay progression. However, in order to draw more accurate conclusions about the drivers and dynamics of deadwood in riparian forests, further monitoring efforts that consider river flooding and flow regime, deadwood transport and saproxylic organism activity in addition to forest management and site conditions, are needed.
Ključne besede: alluvial forest, hardwood floodplain, deadwood decay, Mura-Drava-Danube transboundary biosphere, reserve, riparian area, softwood floodplain, UNESCO biosphere reserve, wetlands
Objavljeno v DiRROS: 18.07.2022; Ogledov: 490; Prenosov: 394
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8. ZaDravo : projektna naloga - sklop B : strokovna izhodišča za segment črni topol (Populus nigra L.) in beli topol (Populus alba L.) : 1. letno poročilo o izvedenih aktivnostih za segment AGregor Božič, Andreja Ferreira, 2021, elaborat, predštudija, študija Ključne besede: evropski črni topol, beli topol, premer debla, spolna struktura, obrečni gozd, reka Drava, Drava, Slovenija
Objavljeno v DiRROS: 18.01.2022; Ogledov: 646; Prenosov: 0 |
