Knut Tore Alfredsen
About
I am professor in hydrology at the department of hydraulic and enviornmental engineering. Responsible for teaching water resources in the basic course in water and environment, hydrology and hydrological modelling. Main research interests within environmental impact assessment, hydrology of rivers and lakes in cold climate and aspects of modelling water resources.
Research
My research is mainly has a focus on cold climate processes in rivers and lakes, environmental impacts of hydropower and applications of models in hydrology and water resources.
My work covers field measurements, data analysis and modelling.
HydroCen
Senter for fornybar energi (FME). Forskning på modellering av elver basert på fjernmålte data og kopling av dette mot fisk.
Supervisor for Dr. Håkon Sundt.
Trygg Elv
The Trygg Elv project aims at defining critical points in rivers during floods using automatic methods. The project will develop tools that can be used to detect and prioritise critical areas during floods meant for planning and operational use.
River development through time
We aim at combining old aerial imagery and artificial intelligence to describe and understand the development of rivers over time.
Hydro Connect
This project will investigate if Norwegian hydropower can play a major role in climate change mitigation. My role is in the investigation of environmental impacts in reservoirs and rivers under various future development scenarios.
Research on river ice
Several projects focused on river ice formation, ice growth, river ice modelling and impacts of river ice.
* River ice formation processes
* Ice in Sautso
* Bøelva frazil formation
Sagelva Research Catchment
Sagelva research catchment was established in 1973. There are two climate stations and three discharge stations in the 8 km2 catchment.
HydroFlex(2018-2022)
The goal of Hydroflex is to develop a turbine capable of multiple stops pr. day. My contribution was to evaluate downstream consequences and provide methods of mitigation of adverse effects of rapid flow changes on fish.
Klima 2050 (2015-2022)
Estimation of runoff from small catchments. Supervisor for Dr. Aynalem Tsegaw.
Publications
Google Scholar
Topics of my publications
Review of Ice Effects on Hydropower Systems
Ice on reservoirs and in regulated river can be an issue for hydropower operation, and hydropower development will influence ice formation. This paper by Gebre et al. provides a thorough overview of ice effects related to hydropower systems.
Proceedings of the 25th IAHR symposium on ice 2020
Proceedings from the 25th IAHR ice conference in Trondheim in November of 2020. Edited by: Knut Alfredsen, Knut Vilhelm Høyland, Wenjun Lu, Per Ludvig Bjerke, Leif Lia and Sveinung Løset.
2025
-
Saberi, Omid;
Takala, Tuure;
Johnson, Joshua;
Alfredsen, Knut Tore;
Lotsari, Eliisa.
(2025)
Modelling of Freeze-Up and Ice Cover Development in a Subarctic River Using a 2D Numerical Model.
Hydrological Processes
Academic article
-
Adolfsen, Pål;
Alfredsen, Knut Tore;
Bremset, Gunnbjørn;
Dalsnes, Bjørn;
Davidsen, Jan Grimsrud;
Kraabøl, Morten.
(2025)
Forslag til tiltak mot pukkellaks i store vassdrag.
Rapport fra nasjonal ekspertgruppe for fiskesperrer (4)
Report
-
Kenawi, Mahmoud Saber Refaei;
Hedger, Richard David;
Alfredsen, Knut Tore;
Sandercock, Brett Kevin;
Korpås, Magnus;
Bakken, Tor Haakon.
(2025)
Land Efficiency of Renewable Energy in Norway: A Synthesis of Footprint and Production Density.
Renewable Energy
Academic article
2024
-
Godara, Nitesh;
Bruland, Oddbjørn;
Alfredsen, Knut Tore.
(2024)
Corrigendum: Comparison of two hydrodynamic models for their rain-on-grid technique to simulate flash floods in steep catchment(Front. Water., (2024), 6, (1384205), 10.3389/frwa.2024.1384205).
Frontiers in water
Errata
-
Karlsson, Sten;
Alfredsen, Knut Tore;
Diserud, Ola Håvard;
Gabrielsen, Sven-Erik;
Lo, Håvard;
Grimelid, Torstein.
(2024)
Undersøkelse av fremtidig behov og muligheter for kultivering av fisk i Lærdalselva.
NINA rapport (2375)
Report
-
Godara, Nitesh;
Bruland, Oddbjørn;
Alfredsen, Knut Tore.
(2024)
Comparison of two hydrodynamic models for their rain-on-grid technique to simulate flash floods in steep catchment.
Frontiers in water
Academic article
-
Abdalla, Elhadi Mohsen Hassan;
Alfredsen, Knut Tore;
Muthanna, Tone Merete.
(2024)
Impacts of slope and length on the hydrological performance of green roof drainage mats.
Journal of Hydrology
Academic article
-
Kazemian, Delaram;
Alfredsen, Knut Tore.
(2024)
Modelling Ice Formation in the Regulated River Orkla with River 1D.
The International Association for Hydro-Environment Engineering and Research (IAHR)
Academic chapter/article/Conference paper
2023
-
Adolfsen, Pål;
Alfredsen, Knut Tore;
Bremset, Gunnbjørn;
Dalsnes, Bjørn;
Kraabøl, Morten;
Lia, Leif.
(2023)
Forslag til tiltak mot pukkellaks i store vassdrag.
Miljødirektoratet. Rapport
Report
-
Sivertsen, Edvard;
Bosco, Camillo;
Abdalla, Elhadi Mohsen Hassan;
Muthanna, Tone Merete;
Alfredsen, Knut Tore.
(2023)
Pilotprosjekt. Rv3 - Oppsummering modellering og datafangst.
SINTEF akademisk forlag
Klima 2050 Note (187)
Report
-
Sættem, Leif Magnus;
Urke, Henning Andre;
Kraabøl, Morten;
Alfredsen, Knut Tore;
Kristensen, Torstein;
Grimelid, Torkjell.
(2023)
Produksjonspotensiale for laks og sjøaure oppstrøms Sjurhaugfoss i Lærdalsvassdraget Vestland Fylke
.
Aqualife R&D
Report
-
Alfredsen, Knut Tore;
Ogarepke, Nkpa.
(2023)
Forprosjekt - Test av grøn laser som grunnlag for miljøvurderingar i regulerte vassdrag.
NTNU
Report
2022
-
Sundt, Håkon;
Alfredsen, Knut;
Forseth, Torbjørn.
(2022)
Remotely sensed data for bathymetric mapping and ecohydraulics modelling in rivers.
NTNU
Doctoral dissertation
-
Pinelli, Anna;
Adeva Bustos, Ana;
Toffolon, Marco;
Alfredsen, Knut Tore;
Harby, Atle.
(2022)
Analysis of environmental impacts of a pump-storage system between two Norwegian reservoirs considering climate scenarios.
Università di Trento
Masters thesis
-
Alfredsen, Knut;
Bruland, Oddbjørn.
(2022)
Hydropower in Cold Regions.
Elsevier
Academic chapter/article/Conference paper
-
Alfredsen, Knut;
Awadallah, Mahmoud Omer Mahmoud.
(2022)
Vurdering av hydraulisk effekt av tersklar i Lærdalselva.
NTNU
Report
-
Alfredsen, Knut.
(2022)
Oversikt over bruk av batymetrisk LiDAR ved NTNU.
NTNU
Report
2021
-
Lillegraven, M.G.;
Alfredsen, Knut.
(2021)
Hydrological modelling of swale and local catchment by Rv3 Stabekken. Flom er forbundet med negative konsekvenser for infrastruktur, miljø, økonomi og mennesker.
NTNU
Masters thesis
-
Le Floch, N.G.Y.;
Alfredsen, Knut.
(2021)
Spatial and cumulative effects of alternative stormwater management methods.
NTNU
Masters thesis
-
Muthanna, Tone Merete;
Alfredsen, Knut;
Kjellsen, Eirik.
(2021)
Performance evaluation of a combined stormwater detention and reuse system - A case study from Trondheim, Norway.
NTNU
Masters thesis
2020
-
Alfredsen, Knut;
Høyland, Knut Vilhelm;
Lu, Wenjun;
Bjerke, Per Ludvig;
Lia, Leif;
Løset, Sveinung.
(2020)
PROCEEDINGS OF THE 25th INTERNATIONAL SYMPOSIUM ON ICE
Trondheim, Norway, 23rd – 25th November 2020.
The International Association for Hydro-Environment Engineering and Research (IAHR)
Proceedings of the IAHR International Symposium on Ice (1)
Academic anthology/Conference proceedings
-
Engeland, Kolbjørn;
Alfredsen, Knut.
(2020)
Hydrology and Water Resources Management in a Changing World.
IWA Publishing
IWA Publishing
Academic anthology/Conference proceedings
2017
-
Alfredsen, Knut;
Søndenaa, Mathilde Hanssen.
(2017)
Hydrologisk dimensjonering i små nedbørfelt. Evaluering av metodene.
NTNU
Masters thesis
2013
-
Chernet, Hargewoin Haile;
Alfredsen, Knut;
Midttømme, Grethe H..
(2013)
The impact of climate change on dam safety and hydropower.
NTNU
Doctoral dissertation
Journal publications
-
Saberi, Omid;
Takala, Tuure;
Johnson, Joshua;
Alfredsen, Knut Tore;
Lotsari, Eliisa.
(2025)
Modelling of Freeze-Up and Ice Cover Development in a Subarctic River Using a 2D Numerical Model.
Hydrological Processes
Academic article
-
Kenawi, Mahmoud Saber Refaei;
Hedger, Richard David;
Alfredsen, Knut Tore;
Sandercock, Brett Kevin;
Korpås, Magnus;
Bakken, Tor Haakon.
(2025)
Land Efficiency of Renewable Energy in Norway: A Synthesis of Footprint and Production Density.
Renewable Energy
Academic article
-
Godara, Nitesh;
Bruland, Oddbjørn;
Alfredsen, Knut Tore.
(2024)
Corrigendum: Comparison of two hydrodynamic models for their rain-on-grid technique to simulate flash floods in steep catchment(Front. Water., (2024), 6, (1384205), 10.3389/frwa.2024.1384205).
Frontiers in water
Errata
-
Godara, Nitesh;
Bruland, Oddbjørn;
Alfredsen, Knut Tore.
(2024)
Comparison of two hydrodynamic models for their rain-on-grid technique to simulate flash floods in steep catchment.
Frontiers in water
Academic article
-
Abdalla, Elhadi Mohsen Hassan;
Alfredsen, Knut Tore;
Muthanna, Tone Merete.
(2024)
Impacts of slope and length on the hydrological performance of green roof drainage mats.
Journal of Hydrology
Academic article
Books
-
Alfredsen, Knut;
Høyland, Knut Vilhelm;
Lu, Wenjun;
Bjerke, Per Ludvig;
Lia, Leif;
Løset, Sveinung.
(2020)
PROCEEDINGS OF THE 25th INTERNATIONAL SYMPOSIUM ON ICE
Trondheim, Norway, 23rd – 25th November 2020.
The International Association for Hydro-Environment Engineering and Research (IAHR)
Proceedings of the IAHR International Symposium on Ice (1)
Academic anthology/Conference proceedings
-
Engeland, Kolbjørn;
Alfredsen, Knut.
(2020)
Hydrology and Water Resources Management in a Changing World.
IWA Publishing
IWA Publishing
Academic anthology/Conference proceedings
Part of book/report
-
Kazemian, Delaram;
Alfredsen, Knut Tore.
(2024)
Modelling Ice Formation in the Regulated River Orkla with River 1D.
The International Association for Hydro-Environment Engineering and Research (IAHR)
Academic chapter/article/Conference paper
-
Alfredsen, Knut;
Bruland, Oddbjørn.
(2022)
Hydropower in Cold Regions.
Elsevier
Academic chapter/article/Conference paper
Report
-
Adolfsen, Pål;
Alfredsen, Knut Tore;
Bremset, Gunnbjørn;
Dalsnes, Bjørn;
Davidsen, Jan Grimsrud;
Kraabøl, Morten.
(2025)
Forslag til tiltak mot pukkellaks i store vassdrag.
Rapport fra nasjonal ekspertgruppe for fiskesperrer (4)
Report
-
Karlsson, Sten;
Alfredsen, Knut Tore;
Diserud, Ola Håvard;
Gabrielsen, Sven-Erik;
Lo, Håvard;
Grimelid, Torstein.
(2024)
Undersøkelse av fremtidig behov og muligheter for kultivering av fisk i Lærdalselva.
NINA rapport (2375)
Report
-
Adolfsen, Pål;
Alfredsen, Knut Tore;
Bremset, Gunnbjørn;
Dalsnes, Bjørn;
Kraabøl, Morten;
Lia, Leif.
(2023)
Forslag til tiltak mot pukkellaks i store vassdrag.
Miljødirektoratet. Rapport
Report
-
Sivertsen, Edvard;
Bosco, Camillo;
Abdalla, Elhadi Mohsen Hassan;
Muthanna, Tone Merete;
Alfredsen, Knut Tore.
(2023)
Pilotprosjekt. Rv3 - Oppsummering modellering og datafangst.
SINTEF akademisk forlag
Klima 2050 Note (187)
Report
-
Sættem, Leif Magnus;
Urke, Henning Andre;
Kraabøl, Morten;
Alfredsen, Knut Tore;
Kristensen, Torstein;
Grimelid, Torkjell.
(2023)
Produksjonspotensiale for laks og sjøaure oppstrøms Sjurhaugfoss i Lærdalsvassdraget Vestland Fylke
.
Aqualife R&D
Report
-
Alfredsen, Knut Tore;
Ogarepke, Nkpa.
(2023)
Forprosjekt - Test av grøn laser som grunnlag for miljøvurderingar i regulerte vassdrag.
NTNU
Report
-
Sundt, Håkon;
Alfredsen, Knut;
Forseth, Torbjørn.
(2022)
Remotely sensed data for bathymetric mapping and ecohydraulics modelling in rivers.
NTNU
Doctoral dissertation
-
Pinelli, Anna;
Adeva Bustos, Ana;
Toffolon, Marco;
Alfredsen, Knut Tore;
Harby, Atle.
(2022)
Analysis of environmental impacts of a pump-storage system between two Norwegian reservoirs considering climate scenarios.
Università di Trento
Masters thesis
-
Alfredsen, Knut;
Awadallah, Mahmoud Omer Mahmoud.
(2022)
Vurdering av hydraulisk effekt av tersklar i Lærdalselva.
NTNU
Report
-
Alfredsen, Knut.
(2022)
Oversikt over bruk av batymetrisk LiDAR ved NTNU.
NTNU
Report
-
Lillegraven, M.G.;
Alfredsen, Knut.
(2021)
Hydrological modelling of swale and local catchment by Rv3 Stabekken. Flom er forbundet med negative konsekvenser for infrastruktur, miljø, økonomi og mennesker.
NTNU
Masters thesis
-
Le Floch, N.G.Y.;
Alfredsen, Knut.
(2021)
Spatial and cumulative effects of alternative stormwater management methods.
NTNU
Masters thesis
-
Muthanna, Tone Merete;
Alfredsen, Knut;
Kjellsen, Eirik.
(2021)
Performance evaluation of a combined stormwater detention and reuse system - A case study from Trondheim, Norway.
NTNU
Masters thesis
-
Alfredsen, Knut;
Søndenaa, Mathilde Hanssen.
(2017)
Hydrologisk dimensjonering i små nedbørfelt. Evaluering av metodene.
NTNU
Masters thesis
-
Chernet, Hargewoin Haile;
Alfredsen, Knut;
Midttømme, Grethe H..
(2013)
The impact of climate change on dam safety and hydropower.
NTNU
Doctoral dissertation
Teaching
Courses:
Teknostart
TVM4101 Vann og miljøteknikk (hydrologidelen)
TVM4520 Vannkraft og Vassdragsteknikk, prosjekt
VM8105 Hydrologi PhD-kurs (faglærar)
VM8109 Emner i vassdragsmiljø (faglærar)
VM8209 Topics in Environmental Hydraulics and Hydrology
VM6020 Kraftverkshydrologi (EVU-kurs)
VM6006 Miljødesign (EVU-kurs)
Supervision
I supervise students on master and PhD level.
List of master projects: MSc-prosjekt
List of PhD projects: PhD-prosjekt
Outreach
2025
-
LectureAlfredsen, Knut Tore. (2025) Status bruk av batymetrisk LiDAR i Heddøla og Tinnelva. NVE Miniseminar ALB - Oppfølging , Oslo 2025-01-23 - 2025-01-23
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LectureAlfredsen, Knut Tore. (2025) Reguleringseffekter og tiltak – med døme frå Lærdal og andre plassar . Kultiveringsanleggenes Forening Kultiveringsmøtet 2025 , Trondheim 2025-03-25 - 2025-03-27
2024
-
Academic lectureGosselin, Marie-Pierre; Halleraker, Jo Halvard; Larsen, Bjørn Mejdell; Alfredsen, Knut Tore. (2024) Hydropower and hydromorphological impacts in Norwegian freshwater pearl mussel rivers: ecological bottlenecks and potential mitigation measures . IAHR 15th International Symposium on Ecohydraulics , Quebec City 2024-05-05 - 2024-05-09
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LectureAlfredsen, Knut Tore. (2024) Tinnelva, Heddøla og Vallaråi. NVE Miniseminar grønn laser og erfaringer innkjøp 2023 , Oslo 2024-04-25 - 2024-04-25
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Lecture
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LectureAlfredsen, Knut Tore. (2024) Påvirkning av vassdragsreguleringer med spesielt fokus på effektkjøring. Kultiveringsanleggenes Forening KAF/KULTIVERINGSMØTET 2024 , Trondheim 2024-03-14 - 2024-03-14
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LectureAlfredsen, Knut Tore. (2024) Reguleringsverknader i Lærdalselva. Lærdal elveeigarlag Årsmøte Lærdal elveeigarlag , Lærdal 2024-04-04 - 2024-04-04
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LectureAlfredsen, Knut Tore. (2024) Hydraulic Modelling and Hydropeaking. SINTEF Energy Advancing in hydropeaking studies: examples and discussion , Trondheim 2024-02-29 - 2024-02-29
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Academic lectureBosco, Camillo; Abdalla, Elhadi Mohsen Hassan; Maurin, Noëlie; Matos Silva, Cristina; Sousa, Vitor; Muthanna, Tone Merete. (2024) Analysing the impact of different precipitation characteristics on hydrological performances of infiltration swales. 16th International Conference on Urban Drainage - ICUD , Delft 2024-06-09 - 2024-06-14
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Academic lectureBosco, Camillo; Abdalla, Elhadi Mohsen Hassan; Muthanna, Tone Merete; Alfredsen, Knut Tore; Rasten, Britt; Kjennbakken, Heidi. (2024) Improved hydrological modelling of infiltration swales in cold climates using underground water levels. IWA IWA World Water Congress, 2024 , Toronto 2024-08-11 - 2024-08-15
2023
-
LectureAlfredsen, Knut Tore. (2023) Hydrologi, hydraulikk og is. Påleggsprosjektet - statusmøte , Lærdal 2023-12-07 - 2023-12-07
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LectureAlfredsen, Knut Tore. (2023) Funksjon og kapasitet til en grønn grøft for håndtering av vegvann. Storm Aqua Klimatilpasningsdagene , Stavanger 2023-12-05 - 2023-12-06
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Academic lectureGosselin, Marie-Pierre; Halleraker, Jo Halvard; Alfredsen, Knut Tore. (2023) Hydropower related hydromorphological alterations in Norwegian pearl mussel rivers. Int. Asso. for Hydroenvironment Engineering and Research 40th IAHR World Congress , Vienna 2023-08-20 - 2023-08-25
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LectureAlfredsen, Knut Tore. (2023) Vassdekt areal og tersklar i Lærdalselva. Lærdal elveeigarlag Årsmøte Lærdal elveeigarlag , Lærdal 2023-03-23 - 2023-03-23
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PosterGundersen, Odd Erik; Alfredsen, Knut Tore; Halleraker, Jo Halvard. (2023) Towards Historical Analysis of Riverscape Development Utilizing Semantic Segmentation. Association for the Advancement of Artificial Intelligence (AAAI) The Workshop on Artificial Intelligence for Social Good (AI4SG-23) , San Francisco, CA USA 2023-02-07 - 2023-02-14
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Academic lectureAlfredsen, Knut Tore. (2023) Long term changes in riverscapes in rivers regulated for hydropower. Sustainability in Hydropower 2023 , Trondheim 2023-06-13 - 2023-06-15
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Academic lectureGosselin, Marie-Pierre; Halleraker, Jo Halvard; Larsen, Bjørn Mejdell; Alfredsen, Knut Tore. (2023) Hydropower and hydromorphological impacts in freshwater pearl mussel rivers: ecological bottlenecks and potential mitigation measures. 2nd International Conference on Sustainability in Hydropower 2023-06-13 - 2023-06-15
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LectureAlfredsen, Knut Tore. (2023) Hydropeaking. HydroLab Nepal Gjesteforelesing for HydroLab, Nepal , Digitalt 2023-03-29 - 2023-03-29
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LectureAlfredsen, Knut Tore. (2023) Oppsummering av resultat frå ALB-Prosjektet. NVE Seminar om bruk av grønn laser i elver og innsjøer , Oslo 2023-04-19 - 2023-04-19
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LectureAlfredsen, Knut Tore. (2023) Ecohydraulics in Environmental Design. HydroLab Gjesteforelesing HydroLab, Nepal , Digitalt 2023-02-02 - 2023-02-02
2022
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LectureAlfredsen, Knut; Awadallah, Mahmoud Omer Mahmoud; Juarez Gomez, Ana. (2022) Resultat frå ALB prosjektet. Kartverket og NVE Final ALB Seminar Norwegian ALB project , Oslo 2022-12-01 - 2022-12-01
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LectureAlfredsen, Knut; Awadallah, Mahmoud Omer Mahmoud. (2022) Hydrologi og Hydraulikk. Pålegssprosjektet Midtveismøte Påleggsprosjektet , Lærdal 2022-10-25 - 2022-10-25
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Academic lectureAlfredsen, Knut. (2022) Ice flood risk reduction in Norway. Assessing and mitigating ice-jam flood hazard and risk , Poznan (digital presentation) 2022-10-19 - 2022-10-20
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LectureAlfredsen, Knut. (2022) Utvalgte resultater fra PhD- og masterstudier ved NTNU . HydroCen WEBINAR OM VANNKRAFT OG KLIMA , Trondheim (digitalt) 2022-11-02 - 2022-11-02
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LectureAlfredsen, Knut. (2022) Ice processes and ice jam floods. Universitetet i Oulu River Engineering and Hydraulic Structures , Oulu (digitalt) 2022-12-09 - 2022-12-09
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Academic lectureAlfredsen, Knut. (2022) Experiences with LiDAR and aerial imagery for the assessment of winter habitat, hydraulic modelling and riverscape classification. IAHR, EcoEnet METHODS FOR ECOHYDRAULICS: REMOTE SENSING , Digitalt 2022-05-20 - 2022-05-20
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LectureAlfredsen, Knut. (2022) LiDAR - Erfaringar frå NTNU. NVE, Kartverket ALB Project, Start-up meeting , Oslo 2022-03-17 - 2022-03-18