Blar i NTNU Open på forfatter "Alfredsen, Knut"
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A cost-effective approach to predict dynamic variation of mesohabitats at the river scale in Norwegian systems
Casas-Mulet, Roser; Alfredsen, Knut; Garcia-Escudero, Ana (Journal article; Peer reviewed, 2014)This paper presents a cost-effective approach to predict dynamic variation of mesohabitat classes or hydromorphological units (HMUs) in the context of a peaking scenario. Predicting dynamic mesohabitats has been a challenge ... -
A dynamic river network method for the prediction of floods using a parsimonious rainfall-runoff model
Tsegaw, Aynalem Tassachew; Skaugen, Thomas; Alfredsen, Knut; Muthanna, Tone Merete (Journal article; Peer reviewed, 2019)Floods are one of the major climate-related hazards and cause causalities and substantial damage. Accurate and timely flood forecasting and design flood estimation are important to protect lives and property. The Distance ... -
An acoustic sensor transmitter for in situ assessment of water quality and fish behaviour during chemical treatment of a parasite-infected river system: tag design and practical use
Alfredsen, Knut; Urke, Henning Andre; Kristensen, Torstein; Kvakland, Marte; Grønningsæter, Åge; Hagen, Anders Gjørwad; Alfredsen, Jo Arve (Journal article; Peer reviewed, 2021) -
An Assessment of Ice Effects on Indices for Hydrological Alteration in Flow Regimes
Alfredsen, Knut (Journal article; Peer reviewed, 2017)Preserving hydrological variability is important when developing environmental flow regimes, and a number of tools have been developed to support this process. A commonly applied method is the index of hydrological alteration ... -
An improved framework for the assessment of water consumption from hydropower production
Bakken, Tor Haakon (Doctoral theses at NTNU;2016:340, Doctoral thesis, 2016)Climate change and the needed reductions in the use of fossil fuels call for the development of renewable energy sources. Hydropower is today the dominant renewable technology in the energy system and in some regions ... -
Analyse av vannforbuk i Kizilirmak ved bruk av WEAP- modellen: Effekter av klimaendringer og økt vannuttak
Rugelbak, Jørgen Melhuus (Master thesis, 2014)I 2009 kjøpte Statkraft en portefølje med tre tyrkiske vannkraftprosjekt; Cakit (20 MW), Kargi (102 MW) og Cetin (517 MW) i tre separate vassdrag. Med disse tre kraftverkene vil Statkraft i 2015 ha en gjennomsnittlig ... -
Analysis and modelling of recent large floods on the river Gaula
Aquije Lei, Ku Pak Peng (Master thesis, 2015)In order to study the flood from 2009, 2010 and 2011 that have been impacting the Gaula waterway, a hydrological and operational model have been built. A brief description of the study is given as an introduction, followed ... -
Analysis and modelling of recent large floods on the river Gaula
Aquije Lei, Ku Pak Peng (Master thesis, 2015)In order to study the flood from 2009, 2010 and 2011 that have been impacting the Gaula waterway, a hydrological and operational model have been built. A brief description of the study is given as an introduction, followed ... -
Applicability of urban streets as temporary open floodways
Skrede, Thea Ingeborg; Muthanna, Tone Merete; Alfredsen, Knut (Journal article; Peer reviewed, 2020)Climate change coupled with urbanization and its increasing impervious surfaces have caused major challenges for the water sector worldwide. In Norway, an ageing infrastructure with already insufficient drainage capacities ... -
Application of HYPE in Norway
Schønfelder, Lennart Hagen; Bakken, Tor Haakon; Alfredsen, Knut; Adera, Abebe Girmay (SINTEF Energi. Rapport;, Research report, 2017) -
Are Reservoirs Water Consumers or Water Collectors? Reflections on the Water Footprint Concept Applied on Reservoirs
Bakken, Tor Haakon; Johnsen, Fredrikke; Killingtveit, Ånund; Alfredsen, Knut (Journal article; Peer reviewed, 2015)IPCC Special Report on Renewable Energy Sources (2011) revealed potentially very high water consumption rates from hydropower production compared to other renewable technologies, but suffered from few studies and methodological ... -
Assessing and Mitigating Ice-Jam Flood Hazards and Risks: A European Perspective
Lindenschmidt, K-E; Alfredsen, Knut; Carstensen, Dirk; Chorynski, Adam; Gustafsson, David; Halicki, M; Hentschel, Bernd; Karjalainen, N; Kögel, M; Kolerski, Tomasz; Kornás-Dynia, M; Kubicki, M; Kundzewicz, Zbigniew W.; Lauschke, Cornelia; Malinger, A; Marszlewski, W; Möldner, F; Näslund-Landenmark, Barbro; Niedzielski, Tomasz; Parjanne, Anti; Pawlowski, B; Pinskwar, I; Remisz, J; Renner, M; Roers, M; Rybacki, M; Szalkiewicz, E; Szydlowski, M; Walusiak, G; Witek, Matylda; Zagata, M; Zdralewicz, M (Peer reviewed; Journal article, 2022)The assessment and mapping of riverine flood hazards and risks is recognized by many countries as an important tool for characterizing floods and developing flood management plans. Often, however, these management plans ... -
Assessing the effects of four SUDS scenarios on combined sewer overflows in Oslo, Norway: evaluating the low-impact development module of the mike urban model
Hernes, Ragni Rønneberg; Gragne, Ashenafi Seifu; Hassan Abdalla, Elhadi Mohsen; Braskerud, Bent C.; Alfredsen, Knut; Muthanna, Tone Merete (Peer reviewed; Journal article, 2020)Paved surfaces, increased precipitation intensities in addition to limited capacity in the sewer systems, cause a higher risk of combined sewer overflows (CSOs). Sustainable drainage systems (SUDS) offer an alternative ... -
Assessment of bridge blockage on flooding
Samie, Mahta (Master thesis, 2023)I denne forskningsstudien brukte vi numeriske simuleringer med HEC-RAS for å undersøke effekten av broblokkeringer på flom i Kaldvella-elven, en liten elv som ligger i Melhus, Norge. Gitt nærheten til mange boligområder ... -
Assessment of future water availability under climate change, considering scenarios for population growth and ageing infrastructure
Kristvik, Erle; Muthanna, Tone Merete; Alfredsen, Knut (Journal article; Peer reviewed, 2018)Climate change is likely to cause higher temperatures and alterations in precipitation patterns, with potential impacts on water resources. One important issue in this respect is inflow to drinking water reservoirs. Moreover, ... -
Assessment of future water availability under climate change, considering scenarios for population growth and ageing infrastructure
Kristvik, Erle; Muthanna, Tone Merete; Alfredsen, Knut (Journal article; Peer reviewed, 2019)Climate change is likely to cause higher temperatures and alterations in precipitation patterns, with potential impacts on water resources. One important issue in this respect is inflow to drinking water reservoirs. Moreover, ... -
Automated Mapping and Change Detection of Rivers and Inland Water Bodies by Semantic Segmentation of SAR Imagery using Deep Learning
Askevold, Renate; Vågen, Mikael (Master thesis, 2022)Målet med denne oppgaven er å detektere utstrekninger av vannforekomster og elver i Norge ved semantisk segmentering av Syntetisk Apertur-Radar (SAR) satellittbilder. To dype nevrale nettverksarkitekturer er implementert ... -
Brief Communication: Mapping river ice using drones and structure from motion
Alfredsen, Knut; Haas, Christian; Tuthan, J; Zinke, Peggy (Journal article; Peer reviewed, 2018)Twenty-first century snowfall changes over the European Alps are assessed based on high-resolution regional climate model (RCM) data made available through the EURO-CORDEX initiative. Fourteen different combinations of ... -
Calibration and validation of fully LiDAR-derived 2D hydraulic models: Integrating SAR imagery and observed water surface elevations
Strifeldt, Fredrik (Master thesis, 2023)Flom er et utbredt og kostbart fenomen som påvirker millioner av mennesker. For å redusere virkningene av flom har utviklingen av flomsonekart blitt avgjørende da de fungerer som verdifulle verktøy i flomhåndtering. ... -
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 ...