1. Uporaba numeričnih modelov ob razlitjih nafte na morjuDušan Žagar, Vanja Ramšak, Matjaž Ličer, Boris Petelin, Vlado Malačič, 2012, pregledni znanstveni članek Povzetek: Razlitje nafte v morju ima številne škodljive posledice na okolje in gospodarstvo. Potrebno je takojšnje ukrepanje pristojnih služb, ki si ob razlitju lahko pomagajo tudi z matematičnimi modeli, s katerimi je mogoče simulirati procese širjenja in razgradnje nafte. V prispevku je predstavljen pregled procesov in modelov širjenja naftnih madežev v morskem okolju. Opisan je model NAFTA3d in prikazana je njegova uporaba. Predstavljeni so vhodni podatki in rezultati modela na dveh možnih razlitjih v Tržaškem zalivu, pri čemer so upoštevane dejanske (nestacionarne) vremenske in hidrodinamične razmere. Prikazane so simulacije po taktičnem in prognostičnem načinu. Z vgrajenimi procesi in možnostjo povezav z različnimi modeli cirkulacije je lahko model NAFTA3d koristno dodatno orodje za ustrezne službe, ki skrbijo za omejitev širjenja in omilitev posledic ob morebitnih razlitjih nafte na morju.
Ključne besede: morje, numerično modeliranje, naravne nesreče, cirkulacijski modeli, izlitja nafte, onesnaževanje, NAFTA3d, Jadransko morje
Objavljeno v DiRROS: 26.03.2025; Ogledov: 687; Prenosov: 488
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2. Numerični modeli za določanje stanja morja v Jadranskem morjuMatjaž Ličer, Dušan Žagar, Maja Jeromel, Martin Vodopivec, 2012, pregledni znanstveni članek Povzetek: V prispevku predstavljamo glavne razloge za numerično modeliranje morja v Jadranskem morju in na kratko opisujemo modele, ki se trenutno uporabljajo v ta namen. Predstavljeni so cirkulacijski model POM za severno Jadransko morje, valovni model SWAN in model razlitja ogljikovodikov v morskem okolju NAFTA3d. Prikazani so tudi nekateri rezultati vseh navedenih modelov in trenutni načrti njihove implementacije.
Ključne besede: morje, numerično modeliranje, naravne nesreče, cirkulacijski modeli, izlitja nafte, onesnaževanje, POM, Jadransko morje
Objavljeno v DiRROS: 26.03.2025; Ogledov: 719; Prenosov: 454
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3. Is it possible to determine the economic impact of jellyfish outbreaks on fisheries? A Case Study - SloveniaBojan Nastav, Matevž Malej, Alenka Malej, Alenka Malej, 2013, izvirni znanstveni članek Povzetek: The interdependence between the economy and the environment is becoming a fact of increasing importance. Productive coastal areas have been recognised as one of the most valuable ecosystems from an ecological and socio-economic point of view. In this paper we focus on the massive presence of jellyfish in the northern Adriatic and their effect on the Slovenian economy. Our results indicate that high jellyfish abundance in 2004 resulted in a reduction of fish catch, value added, gross income, and employment in the fishing industry. Moreover, the government and the EU have acknowledged the impact of jellyfish on the fishing industry by allocating financial help to the fishermen involved. We attempted to assess other factors influencing the fishing industry but none were statistically significant. The input-output analysis has not revealed a significant impact on the entire Slovenian economy presumably due to the small contribution of the fishing industry to Slovenian GDP. Our work is a first attempt to relate ecological changes such as jellyfish outbreaks in the northern Adriatic to the wider economy and we suggest that such a methodology can be applied to other countries/regions and to other natural phenomena affecting the economy.
Ključne besede: morje, objavljeni prispevki na konferenci, morsko ribištvo, trajnostni razvoj, gospodarski aspekti, meduze, množično pojavljanje, distribucija, numerično modeliranje, klimatske spremembe, hipoteze, Pelagia noctiluca, Jadransko morje, gospodarske politike
Objavljeno v DiRROS: 26.03.2025; Ogledov: 924; Prenosov: 605
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4. Vehicle–bridge interaction modelling using precise 3D road surface analysisMaja Kreslin, Peter Češarek, Aleš Žnidarič, Darko Kokot, Jan Kalin, Rok Vezočnik, 2024, izvirni znanstveni članek Povzetek: Uneven road surfaces are the primary source of excitation in the dynamic interaction between a bridge and a vehicle and can lead to errors in bridge weigh-in-motion (B-WIM) systems. In order to correctly reproduce this interaction in a numerical model of a bridge, it is essential to know the magnitude and location of the various roadway irregularities. This paper presents a methodology for measuring the 3D road surface using static terrestrial laser scanning and a numerical model for simulating vehicle passage over a bridge with a measured road surface. This model allows the evaluation of strain responses in the time domain at any bridge location considering different parameters such as vehicle type, lateral position and speed, road surface unevenness, bridge type, etc. Since the time domain strains are crucial for B-WIM algorithms, the proposed approach facilitates the analysis of the different factors affecting the B-WIM results. The first validation of the proposed methodology was carried out on a real bridge, where extensive measurements were performed using different sensors, including measurements of the road surface, the response of the bridge when crossed by a test vehicle and the dynamic properties of the bridge and vehicle. The comparison between the simulated and measured bridge response marks a promising step towards investigating the influence of unevenness on the results of B-WIM.
Ključne besede: interakcija vozilo in most, terestično lasersko skeniranje, neravnost vozišča, numerično modeliranje
Objavljeno v DiRROS: 26.01.2024; Ogledov: 1909; Prenosov: 909
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