Browsing NTNU Open by Author "Halleraker, Jo Halvard"
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100 key questions to guide hydropeaking research
Hayes, Daniel; Bruno, Maria Cristina; Alp, Maria; Boavida, Isabel; Batalla, Ramon J.; Bejarano, Maria Dolores; Noack, Markus; Vanzo, Davide; Casas-Mulet, Roser; Vericat, Damia; Carolli, Mauro; Tonolla, Diego; Halleraker, Jo Halvard; Gosselin, Marie-Pierre; Chiogna, Gabriele; Zolezzi, Guido; Venus, Terese E. (Peer reviewed; Journal article, 2023)As the share of renewable energy grows worldwide, flexible energy production from peak-operating hydropower and the phenomenon of hydropeaking have received increasing attention. In this study, we collected open research ... -
Assessing the potential for gas supersaturation downstream of hydropower plants in Norway, Austria and Germany
Pulg, Ulrich; Lennox, Robert; Enqvist, Martin; Stranzl, Sebastian Franz; Espedal, Espen Olsen; Schwarz, Michael; Lorke, Andreas; Flödl, Peter; Hauer, Christoph; Schletterer, Martin; Halleraker, Jo Halvard; Velle, Gaute (Journal article; Peer reviewed, 2024)Hydroelectric power facilities can generate episodic total dissolved gas supersaturation (TDGS), which is harmful to aquatic life. We developed a decision tree-based risk assessment to identify the potential for TDGS at ... -
By-pass valves in hydropower plants: An ecologically important measure to mitigate stranding in rivers due to emergency turbine flow shutdown
Halleraker, Jo Halvard; Natvik, Eirik Vee; Vaskinn, Kjetil Arne; L´Abée-Lund, Jan Henning; Alfredsen, Knut Tore (Journal article; Peer reviewed, 2023)Hydropeaking operations or accidental shutdown in hydropower (HP) plants lead to rapid reduction in river flows downstream HP outlets and cause severe stranding of biota. Stranding of fish in dewatered riverbeds is a major ... -
Classification of hydropeaking impacts on Atlantic salmon populations in regulated rivers
Bakken, Tor Haakon; Harby, Atle; Forseth, Torbjørn; Ugedal, Ola; Sauterleute, Julian Friedrich; Halleraker, Jo Halvard; Alfredsen, Knut (Peer reviewed; Journal article, 2021)This article proposes and demonstrates a new classification system of fish population level effects of hydropeaking operations in rivers. The classification of impacts is developed along two axes; first, the hydromorphological ... -
Flow Ramping from Hydropower Operation Evaluation of Trends and Mitigation of Peak Supply and Environmental Impacts in Norway
Kenawi, Mahmoud (Master thesis, 2020)Increased flexibility is vital in hydropower systems to meet future market demands, and work is undertaken to improve hydropower machinery to handle larger ramping rates and more frequent starts and stops. This increased ... -
Introducing HyPeak: An international network on hydropeaking research, practice, and policy
Alp, Maria; Batalla, Ramon J.; Bejarano, Maria Dolores; Boavida, Isabel; Carpa, Hervé; Carolli, Mauro; Casas-Mulet, Roser; Costa, Maria; Halleraker, Jo Halvard; Hauer, Christoph; Hayes, Daniel; Harby, Atle; Noack, Markus; Palau, A.; Schneider, Matthias; Schönfelder, Lennart Hagen; Tonolla, Diego; Vanzo, Davide; Venus, Terese E.; Vericat, Damia; Zolezzi, Guido; Bruno, Maria Cristina (Peer reviewed; Journal article, 2022)An increase in the demand for renewable energy is driving hydropower development and its integration with variable renewable energy sources. When hydropower is produced flexibly from hydropower plants, it causes rapid and ... -
Raske vannstandsendringer i elver - Virkninger på fisk, bunndyr og begroing
Harby, Atle; Alfredsen, Knut; Arnekleiv, Jo Vegar; Flodmark, Lars Erik Wilhelm; Halleraker, Jo Halvard; Johansen, Stein W; Saltveit, Svein Jakob (SINTEF Rapport;, Research report, 2004) -
Towards an automatic characterization of riverscape development by deep learning
Alfredsen, Knut; Dalsgård, Arild; Shamsaliei, Saeid; Halleraker, Jo Halvard; Gundersen, Odd Erik (Peer reviewed; Journal article, 2021)Riverscapes are under pressure from anthropogenic development, and this challengesthe conservation of biodiversity, hydromorphology and land types. To assess changesand restoration potential, an understanding of alteration ...