Nils Roar Sælthun

Image of Nils Roar Sælthun
Mobile phone +47 91859909
Visiting address Sem Sælands vei 1 0317 Oslo
Postal address Postboks 1047 Blindern 0316 Oslo

Academic interests

  • Development and applications of hydrological models.
  • Water resources management, impacts of climate change impacts on water resources
  • Hydropower hydrology
  • Floods, design flood estimation
  • Environmental information systems


Higher education and employment history

2005-2012 University of  Oslo, Faculty of Mathematics and Natural Sciences: Department Chair, Department of Geosciences

1987-2005 University of Oslo, Department of Geophysics/Department of Geosciences: Adjunct professor  (20%) hydrology.

2002-2005 Norwegian Institute for Water Research: Research Director, Freshwater Ecology and Technology Department

1999-2001 Norwegian Institute for Water Research, Oslo: Head of  Freshwater Ecology Research Department

1995-1999 Norwegian Institute for Water Research, Oslo, Norway:Research Manager, Hydrology/Hydroinformatics.

1976-1995 Norwegian Water Resources and Energy Directorate: Hydrology Department, Oslo: Hydrologist, Chief Engineer - Head of EDP division, Special adviser

1972-1975 University of Oslo, Department of Geophysics, Senior research assistant.

1971-1971 Norwegian Meteorological Institute, Department of Hydrometeorology, Oslo: Meteorologist.

Cand. Real. 1972 Geophysics, University of Oslo. Main subjects: Hydrology and Meteorology.


  • Oslo Center for Interdisciplinary Environmental and Social Research, Board member
  • National Advisory Board for Geoscience, Head
  • Norwegian Climate Centre, Board member

International cooperation

  • Vietnam National University: Establishment of master programme in geohazards.

International project experience

EU, SADC, Mozambique, Tanzania, Lesotho, Zambia, Palestinian territories, Vietnam, Ukraine, Dominican Republic, Costa Rica, Nicaragua.

Tags: Hydrology, Hydrological modelling, Water resources managemen, Climate change, Hydropower, Floods


Ø. Kaste, R.F. Wright, L.J. Barkved, T. Engen-Skaugen, J. Magnusson, N.R. Sælthun 2006: Linked models to assess the impacts of climate change on nitrogen in a Norwegian river basin and fjord system. Sci. Tot. Env. 365(1-3) 200-222.

T.V. Callaghan, M. Johansson, O.W. Heal, N.R. Sælthun, L.J. Barkved, N. Byfield, O. Brandt, R. Brooker, H.H. Christiansen, M. Forchhammer, T.T. Høye, O. Humlum, A. Järvinen, C. Jonasson, J. Kohler, B. Magnusson, H. Meltofte, L. Mortensen, S. Neuvonen, I. Pearce, M. Rasch, L. Turner, B.Hasholt, E. Hutha, E. Leskinen, N. Nielsen. P. Siikamäki 2004: Environmental changes in the North Atlantic Region: SCANNET as a collaborative approach for documenting, understanding and predicting changes. Ambio Suppl 13, 39-50.

S. Beldring, K. Engeland, L.A. Roald, N.R. Sælthun, A. Voksø 2003: Estimation of parameters in a distributed precipitation-runoff model for Norway. Hydrology and Earth System Sciences 7(3) 304-316.

I. Krasovskaia, L. Gottschalk, N.R. Sælthun, H. Berg 2001: Perception of risk of flooding, case of 1995 flood in Norway. Hydrol. Sci. J. 46(6) 855-868.

L. Gottschalk, S. Beldring, K. Engeland, L. Tallaksen, N.R. Sælthun, Y. Motovilov 2001: Regional/Macro-scale Hydrological Modelling – A Scandinavian Experience. Hydrol. Sci. J. 46(6) 963-982.

L. Gottschalk, I. Krasovskaia, N.R. Sælthun 2002: Economic risk of flooding: A case study for the Glomma River, Norway. In: Hydrological models for environmental management. NATO Science series, Kluwer Academics. pp 241-263 .

N. R. Sælthun, P. Aittoniemi, S. Bergström, K. Einarsson, T. Jóhannesson, G. Lindström, P.-E. Ohlsson, T. Thomsen, B. Vehviläinen, and K.O. Aamodt 1998: Climate Change Impacts on Runoff and Hydropower in the Nordic Countries. Final report from the project "Climate Change and Energy Production". TemaNord 1998:552, 170 pp. Nordic Council of Ministers, Copenhagen.

N. R. Sælthun 1998: The Alta hydropower development scheme. In K. Takeuchi, M. Hamlin, Z.W. Kundzewicz, D. Rosbjerg & S.P. Simonovic: Sustainable Reservoir Development and Management. IAHS Publication no 251.

I. Krasovskaia and N. R. Sælthun 1997: Sensitivity of the stability of of Scandinavian river flow regimes to a prediced temperature rise. Hydrol. Sci. J. 42(5) pp 693-711.

Å. Killingtveit, K. Sand, and N. R. Sælthun: Field instrumentation. In: Geochemical processes, weathering and groundwater recharge in catchments. Eds. O. M. Sæther and P. de Caritat. Ch 8. pp 211-237. Balkema.

N. R. Sælthun 1996: Climate change impact on hydrology and cryology. In: Potential Ecological Impacts of Climate Change in the Alps and Fennoscandian Mountains. An Annexe Report to IPCC Working Group II. Eds. A. Guisan, J. I. Holten, R. Spichiger, and L. Tessier. pp 45-49. Conservatoir et Jardin Botanique de la Ville de Genève, Genève.

Å. Killingtveit and N. R. Sælthun 1995: Hydrology. Hydropower Development 7. 213 pp. Norwegian Institute of Technology, Division of Hydraulic Engineering, Trondheim. Kinesisk utgåve 2010.

  • Li, Hong; Gao, Hongkai; Zhou, Yanlai; Storteig, Ina Cecilie; Nie, Linmei; Sælthun, Nils Roar & Xu, Chong-Yu (2020). Urban flood modeling of a partially separated and combined drainage system in the Grefsen basin in Oslo, Norway. Journal of Water Management Modelling.  ISSN 2292-6062.
  • Li, Hong; Gao, Hongkai; Zhou, Yanlai; Xu, Chong-Yu; Ortega, Rengifo & Sælthun, Nils Roar (2020). Usage of SIMWE model to model urban overland flood: a case study in Oslo. Hydrology Research.  ISSN 1998-9563.  51(2), s 366- 380 . doi: 10.2166/nh.2020.068 Full text in Research Archive.
  • Xu, Hongliang; Xu, Chong-Yu; Sælthun, Nils Roar; Xu, Youpeng; Zhou, Bin & Chen, Hua (2015). Entropy theory based multi-criteria resampling of rain gauge networks for hydrological modelling - A case study of humid area in southern China. Journal of Hydrology.  ISSN 0022-1694.  525, s 138- 151 . doi: 10.1016/j.jhydrol.2015.03.034
  • Xu, Hongliang; Xu, Chong-Yu; Sælthun, Nils Roar; Zhou, Bin & Xu, Youpeng (2015). Evaluation of reanalysis and satellite-based precipitation datasets in driving hydrological models in a humid region of Southern China. Stochastic environmental research and risk assessment (Print).  ISSN 1436-3240.  29(8), s 2003- 2020 . doi: 10.1007/s00477-014-1007-z
  • Yuan, YB; Zhu, YQ; Zhou, Y; Sælthun, Nils Roar; Cui, W & Huang, JJ (2009). Rough set for quantitative analysis of characteristic information in metallogenic prediction. Kybernetes.  ISSN 0368-492X.  38(10), s 1801- 1811 . doi: 10.1108/03684920910994321
  • Sælthun, Nils Roar (2007). Impacts on water resources and hydropower production, In Marta Moren-Abat; Philippe Quevauviller; Luc Feyen; Anna-Stiina Heiskanen; Peeter Nooges; Anne Lyche Solheim & Elisabeth Lipiatou (ed.),  International Workshop Climate Change Impacts on the Water Cycle, Resources and Quality Research-Policy Interface Scientific and policy report.  Office for Official Publications of the European Communities.  ISBN 92-79-03314-X.  Session III.  s 93 - 94
  • Yuan, Yanbin; Zhou, Youa; Zhu, Yaqiong; Yuan, Xiaohui & Sælthun, Nils Roar (2007). Development of flood routing simulation system of digital Qingjiang based on integrated spatial information technology. Proceedings of SPIE, the International Society for Optical Engineering.  ISSN 0277-786X.  6795, s 79548
  • Kaste, Øyvind; Wright, Richard; Barkved, Line; Bjerkeng, Birger; Engen-Skaugen, Torill; Magnusson, Jan & Sælthun, Nils Roar (2006). Linked models to assess the impacts of climate change on nitrogen in a Norwegian river basin and fjord system. Science of the Total Environment.  ISSN 0048-9697.  365(1-3), s 200- 222
  • Heal, O.W.; Bayfield, N.; Callaghan, T.V.; Høye, T.T.; Järvinen, A.; Johansson, M.; Kohler, J; Magnusson, B; Mortensen, L; Neuvonen, S; Rasch, M. & Sælthun, Nils Roar (2005). SCANNET: a Scandinavian-North European network of terrestrial field Bases, In D.B.A. Thompson; M.F. Price & C.A. Galbraith (ed.),  Mountains of northern Europe. Conservation, management, people and nature.  Scottish Natural Heritage.  ISBN 0114973199.  34.  s 359 - 364
  • Callaghan, T.V.; Johansson, M; Heal, O.W.; Sælthun, Nils Roar; Barkved, Line; Bayfield, N; Brandt, Ola; Brooker, R.; Christiansen, Hanne Hvidtfeldt; Forchhammer, Mads C.; Hoye, T.T.; Humlum, Ole; Jarvinen, A; Jonasson, C; Kohler, Jack; Magnusson, B; Meltofte, H; Mortensen, L; Neuvonen, Seppo; Pearce, I; Rasch, M.; Turner, L; Hasholt, B; Huhta, E; Leskinen, E; Nielsen, N. & Siikamaki, P (2004). Environmental Changes in the North Atlantic Region: SCANNET as a collaborative approach for documenting, understanding and predicting changes. Ambio.  ISSN 0044-7447.  13, s 39- 50
  • Gottschalk, Lars; Krasovskaia, Irina & Sælthun, Nils Roar (2002). Economic risk of flooding: A case study for the Glomma River, Norway, In M. Bolgov; Lars Gottschalk; Irina Krasovskaia & R.J. Moore (ed.),  Hydrological models for environmental management.  NATO Science Series, Kluwer Academic Publishers..  5: Risk assessment.  s 241 - 263
  • Krasovskaia, Irina; Gottschalk, Lars; Sælthun, Nils Roar & Berg, Hallvard (2001). Perception of Risk of Flooding, Case of 1995 Flood in Norway. Hydrological Sciences Journal.  ISSN 0262-6667.  46(6), s 855- 868
  • Gottschalk, Lars; Beldring, Stein; Engeland, Kolbjørn; Motovilov, Yuri; Tallaksen, Lena; Sælthun, Nils Roar & Kolberg, S. (2001). Regional/Macro-scale Hydrological modelling:- a Scandinavian experience. Hydrological Sciences Journal.  ISSN 0262-6667.  46(6), s 963- 982

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  • Sælthun, Nils Roar; Barton, David Nicholas & Venter, Zander Samuel (2021). REO: estimering av overflateavrenning fra urbane felt. Beregningsgrunnlag for et arealdifferensiert overvannsgebyr (revidert utgave). NINA rapport. 1851b. Show summary
  • Sælthun, Nils Roar (2010). Communicating Climate Change. Show summary
  • Sælthun, Nils Roar (2010). Hydrololgical modelling and forecasting in Norwegian hydropower systems. Show summary
  • Sælthun, Nils Roar (2010). Norway and the University of Oslo, Department of Geosciences.
  • Alfredsen, Knut; Finstad, Anders Gravbrøt; Fiske, Peder; Forseth, Torbjørn; Hvidsten, Nils Arne; Jensen, Arne Johan; Stickler, Morten; Sælthun, Nils Roar; Tjomsland, Torulv; Tøfte, Lena S; Ugedal, Ola & Warland, Geir (2007). Climate change effects on discharge, hydropower production, water temperature, ice conditions and their impact on Atlantic salmon in the regulated Orkla River in Norway.
  • Sælthun, Nils Roar (2007). Framtidas klima – behov for nye strategiar og tiltak?.
  • Sælthun, Nils Roar (2007). Impacts/downscaling, abiotic systems.
  • Sælthun, Nils Roar (2007). Klimaendringar og vassdragsforvaltning.
  • Sælthun, Nils Roar (2006). Impacts on water resources and hydropower production. Show summary
  • Sælthun, Nils Roar (2006). Status snømodellering.
  • Sælthun, Nils Roar; Barkved, Line Johanne; Kaste, Øyvind & Engen-Skaugen, Torill (2005). The snow that fell last year - was it the last? Snow cover as an indicator of climate change. Show summary
  • Krasovskaia, Irina; Gottschalk, Lars; Sælthun, Nils Roar & Berg, Hallvard (2000). Kampen mot vannet - risikovurderinger og handlingsvalg blant lokale beslutningstakere og publikum. Hydra-rapportserie. R04.
  • Sælthun, Nils Roar; Berg, Hallvard; Voksö, A.; Eggestad, Hans Olav; Gottschalk, Lars; Karasovskaia, I.; Wathne, M.; Skoglund, M. & Kristensen, S.E. (2000). Økonomisk risikoanalyse for flommer. Hydra-rapportserie. R03.
  • Engeland, Kolbjørn; Gottschalk, Lars; Sælthun, Nils Roar & Tallaksen, Lena (2000). Distributed modelling using global parameter sets. Show summary
  • Gottschalk, Lars; Beldring, Stein; Engeland, Kolbjørn; Tallaksen, Lena; Sælthun, Nils Roar & Motovilov, Yuri (2000). Macro-scale hydrological modelling - A Scandinavian experience.
  • Sælthun, Nils Roar (2000). Risk analysis project within the Norwegian HYDRA flood research programme.
  • Sælthun, Nils Roar & Lindholm, Oddvar (2000). Forurensningsproblemer i og fra tettsteder i forbindelse med flom.
  • Sælthun, Nils Roar (1999). Flommer, flomsikring og miljø - konflikt eller konsensus. Hydra-rapport. Mi06.
  • Sælthun, Nils Roar & Lindholm, Oddvar (1999). Forurensningsproblemer i og fra tettsteder i forbindelse med flom. Hydra-rapport. T05.

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Published Dec. 10, 2013 7:55 PM - Last modified May 21, 2021 12:40 PM