Browsing NTNU Open by Author "Szabo-Meszaros, Marcell"
Now showing items 1-12 of 12
-
Application of Three-Dimensional CFD Model to Determination of the Capacity of Existing Tyrolean Intake
Bor Turkben, Asli; Szabo-Meszaros, Marcell; Vereide, Kaspar Vatland; Lia, Leif (Journal article; Peer reviewed, 2024)CFD models of intakes in high-head hydropower systems are rare due to the lack of geometric data and cost of modeling. This study tests two different types of software to see how modeling can be performed in a cost-effective ... -
Can Energy Depletion of Wild Atlantic Salmon Kelts Negotiating Hydropower Facilities Lead to Reduced Survival?
Baktoft, Henrik; Gjelland, Karl Øystein; Szabo-Meszaros, Marcell; Silva, Ana T.; Riha, Milan; Økland, Finn; Alfredsen, Knut; Forseth, Torbjørn (Peer reviewed; Journal article, 2020)Repeat spawners constitute an important component of Atlantic salmon populations, but survival of post-spawning individuals (kelts) are often compromised by anthropogenic structures such as hydropower plants (HPPs). Potential ... -
CFD model simulations for the purpose of optimizing secondary intakes: Application of 3D CFD for intakes, optimization of an existing intake structure
Bor, Asli; Szabo-Meszaros, Marcell; Vereide, Kaspar; Lia, Leif (HydroCen Rapport;38, Research report, 2023)Secondary intakes, also known as brook intakes, are crucial for hydropower schemes in alpine regions with steep hills and a high number of tributaries. Brook intakes are normally a minor part of the total inflow and combined ... -
Experimental hydraulics on fish-friendly trash-racks: an ecological approach
Szabo-Meszaros, Marcell; Navaratnam, Christy Ushanth; Aberle, Jochen; Silva, Ana T.; Forseth, Torbjørn; Calles, Olle; Fjeldstad, Hans-Petter; Alfredsen, Knut (Journal article; Peer reviewed, 2018)The obstruction of fish migratory routes by hydroelectric facilities is worldwide one of the major threats to freshwater fishes. During downstream migration, fish may be injured or killed on the trash-racks or in the ... -
Head losses and flow field at trash racks
Øvregård, Eirik Bruvik (Master thesis, 2016)The purpose of this master thesis was to measure the head loss caused by fish-friendly trash racks in an open water channel and to measure the turbulent flow field around its bars. Angled model trash racks with different ... -
Head losses and flow field at trash racks
Øvregård, Eirik Bruvik (Master thesis, 2016)The purpose of this master thesis was to measure the head loss caused by fish-friendly trash racks in an open water channel and to measure the turbulent flow field around its bars. Angled model trash racks with different ... -
Methods to safeguard downstream migration of salmonids past hydropower structures
Szabo-Meszaros, Marcell (Doctoral theses at NTNU;2019:104, Doctoral thesis, 2019)Sustainable development of hydropower production must include measures to reduce the negative consequences of river fragmentations. Migratory Atlantic salmon (Salmo salar, L) is one of the species that can be severely ... -
Modelling mitigation measures for smolt migration at dammed river sections
Szabo-Meszaros, Marcell; Forseth, Torbjørn; Baktoft, Henrik; Fjeldstad, Hans-Petter; Silva, Ana T.; Gjelland, Karl Øystein; Økland, Finn; Uglem, Ingebrigt; Alfredsen, Knut (Journal article; Peer reviewed, 2019)There is no generic solution to establish safe passage of downstream migrating fish passed hydropower facilities and mitigation measures are species‐ and site‐specific. Development of solutions is thus often based on “trial ... -
Shelter for juvenile Atlantic salmon: availability and prediction in rivers with and without hydropower regulation.
Szabo-Meszaros, Marcell (Master thesis, 2015)It is assumed that river regulation in general and hydropeaking in particular, cause elevated degrees of fine sediments in river beds which affect negatively habitat quality for juvenile salmon. Finstad et al. (2007) ... -
Shelter for juvenile Atlantic salmon: availability and prediction in rivers with and without hydropower regulation.
Szabo-Meszaros, Marcell (Master thesis, 2015)It is assumed that river regulation in general and hydropeaking in particular, cause elevated degrees of fine sediments in river beds which affect negatively habitat quality for juvenile salmon. Finstad et al. (2007) ... -
Three-dimensional migratory behaviour of European silver eels (Anguilla anguilla) approaching a hydropower plant
Kjærås, Halvor; Baktoft, Henrik; Silva, Ana T.; Gjelland, Karl Øystein; Økland, Finn; Forseth, Torbjørn; Szabo-Meszaros, Marcell; Calles, Olle (Peer reviewed; Journal article, 2022)Three-dimensional migratory behaviour of European silver eels (Anguilla anguilla) approaching a hydropower plant facilities to accomodate downstream eel migration. The results of this recommendation are poorly studied, and ... -
Validation of a Swimming Direction Model for the Downstream Migration of Atlantic Salmon Smolts
Szabo-Meszaros, Marcell; Silva, Ana T.; Bærum, Kim Magnus; Baktoft, Henrik; Alfredsen, Knut; Hedger, Richard David; Økland, Finn; Gjelland, Karl Øystein; Fjeldstad, Hans-Petter; Calles, Olle; Forseth, Torbjørn (Peer reviewed; Journal article, 2021)Fish swimming performance is strongly influenced by flow hydrodynamics, but little is known about the relation between fine-scale fish movements and hydrodynamics based on in-situ investigations. In the presented study, ...