Nils Reidar B. OlsenProfessorSiv. Ing. (MSc), The Norwegian Institute of Technology, 1987.Dr.ing., The Norwegian Institute of Technology, 1991.
Address:Department of Hydraulic and Environmental Engineering, NTNUS.P. Andersensvei 5 N7491 Trondheim Norway 
Aberle, J., Branss, T., Eikenberg, R., Henry, P.Y. and Olsen, N. R. B. (2021) Directional dependency of flow resistance in an unlined rock blasted hydropower tunnel, Accepted to Journal of Hydraulic Research.
Olsen, N. R. B., Vollmer, S., Pribil, D., Hollmann, N. and Gintz, D. (2021) Numerical modelling of granjanite tracer movements in the Rhine river, 6th IAHR Europe conference, Warsaw, Poland. Web page with figures and animations
Klassen, I., Gonzalez, W., Seidel, F., Nestmann, F., Hillebrand, G., Hoffmann, T. and Olsen, N. R. B. (2021) 3D numerical analyses of suspended sediment concentrations in a meandering river upstream a hydropower reservoir, 6th IAHR Europe conference, Warsaw, Poland.
Schaefer, D., Hillebrand, G. and Olsen, N. R. B. (2021) Numerical 3DModelling of Hydrodynamics and Microplastic Transport of a section of the Rhine, 6th IAHR Europe conference, Warsaw, Poland.
Aberle, J., Henry, PY., Kleischmann, F., Navaratnam, C. U., Vold, M., Eikenberg, R. and Olsen, N. R. B. (2020) Experimental and numerical determination of the head loss of a pressure driven flow through an unlined rock blasted tunnel (OpenAccess) Water, 12, 3492; doi:10.3390/w12123492. More information about the project
Olsen, N. R. B. (2020) Numerical modelling of sediment deposition in Lake Mills, USA. River Flow 2020, Delft, The Netherlands. Web page with figures and animations
NunezGonzalez, F., MartinVide, J. P. and Olsen, N. R. B. (2020) A specific energy diagram for antidunes, River Flow 2020, Delft, The Netherlands.
Olsen, N. R. B. and Haun, S. (2018) Numerical modelling of bank failures during reservoir drawdown. RiverFlow 2018, Lyon, France.
Olsen, N. R. B. (2017), Numerical modelling of downstreammigrating antidunes, Earth Surface Processes and Landforms.Vol 42, pp 2393–2401. doi:10.1002/esp.4193.
Hillebrand, G., Klassen, I. and Olsen, N. R. B. (2017), 3D CFD modelling of velocities and sediment transport in the Iffezheim hydropower reservoir, Hydrology Research, Vol. 48, Issue 1, pp. 147159. doi:10.2166/nh.2016.197.
Olsen, N. R. B. (2016), Numerical modelling of antidune formation and propagation, International Symposium on River Sedimentation, Stuttgart, Germany.
Olsen, N. R. B. (2015), Four free surface algorithms for the 3D NavierStokes equations, Journal of Hydroinformatics, Vol. 17, Issue 6, pp 845856.
Bråtveit, K. and Olsen, N. R. B. (2015), Calibration of horizontal acoustic doppler current profilers by three dimensional CFD simulations (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 9, Issue 1, pp 4149.
Baranya, S., Olsen, N. R. B. and Jozsa, J. (2015), Flow analysis of a river confluence with field measurements and RANS model with nested grid approach , River Research and Applications, Vol. 31, Issue 1, pp 2841.
Nøvik, H., Dudhraj, A., Olsen, N. R. B., Bishwakarma, M. B. and Lia, L. (2014), Numerical modelling of nonuniform flow in settling basins (OpenAccess), Hydro Nepal, Vol. 14, pp 2735.
Baranya, S., Olsen, N. R. B., Stoesser, T. and Sturm, T. (2014), A nested grid based computational fluid dynamics model to predict bridge pier scour, Water Management, Vol. 167, Issue 5, pp 259–268, DOI: 10.1680/wama.12.00104.
Eilertsen, R., Olsen, N. R. B., Rüther, N. and Zinke, P. (2013), Channelbed changes in distributaries of the lake Øyeren delta, southern Norway, revealed by interferometric sidescan sonar (OpenAccess), Norwegian Journal of Geology, Vol. 93, No. 1.
Haun, S., Kjærås, H., Løvfall, S. and Olsen, N. R. B. (2013), Threedimensional measurements and numerical modelling of suspended sediments in a hydropower reservoir, Journal of Hydrology, 479, pp 180188.
Haun, S., Lizano, L. and Olsen, N. R. B. (2013) "Measuring suspended sediment concentration in a reservoir using laser diffraction", IAHR 35th Congress, Chengdu, China.
Bråtveit, K., Brevik, O. and Olsen, N. R. B. (2013) "Threedimensional numerical study of an unlined rockblasted sand trap", IAHR 35th Congress, Chengdu, China.
Zhang, Q., Hillebrand, G., Klassen, I., Vollmer, S., Olsen, N. R. B., Moser, H. and Hinkelmann, R. (2013) "Sensitivity analysis of flow field simulation in the Iffezheim reservoir in Germany using the 3D SSIIM model", IAHR 35th Congress, Chengdu, China.
Haun, S. and Olsen, N. R. B. (2012), Threedimensional numerical modelling of reservoir flushing in a prototype scale, International Journal of River Basin Management, 10:4; pp. 341349, DOI:10.1080/15715124.2012.736388.
Baranya, S., Olsen, N. R. B., Stoesser, T. and Sturm, T. (2012), Threedimensional RANS modeling of flow around circular piers using nested grids (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 6, No. 4, pp 648662.
Feurich, R., Boubee, J. and Olsen, N. R. B. (2012), Improvement of fish passage in culverts using CFD, Ecological Engineering, Vol 47, Oct. 2012, pp 1–8; doi:10.1016/j.ecoleng.2012.06.013.
Haun, S. and Olsen, N. R. B. (2012), Threedimensional numerical modelling of the flushing process of the Kali Gandaki Hydropower Reservoir, Lakes and Reservoirs, Research and Management, Vol. 17, issue 1, pp 2533.
Feurich, R. and Olsen, N. R. B. (2012), Finding the Free Surface of Supercritical Flows  a Numerical Investigation (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 6, No. 3, pp 307315.
Haun, S. and Olsen, N. R. B. (2012) "3D numerical simulation of the flushing process in the Angostura reservoir", RiverFlow 2012, San Jose, Costa Rica.
Haun S. and Olsen, N. R. B. (2012), "Numerical simulation of sediment deposition in a hydropower reservoir", Proceedings of the 18th IAHR AsiaPacific Congress, JejuIsland, South Korea, 2012.
Haun, S., Dorfmann, C., Harb, G. and Olsen, N. R. B. (2012), 3D numerical modelling of the reservoir flushing of the Bodendorf reservoir, Austria, IAHR European Conference, Munich, Germany.
Vingerhagen, S. and Olsen, N. R. B. (2012), 3D numerical modelling of the capacity for a partially pressurized spillway, IAHR European Conference, Munich, Germany.
Feurich, R. and Olsen, N. R. B. (2012) "3D numerical simulation of supercritical junction flow", IAHR European Conference, Munich, Germany.
Hillebrand, G., Klassen, I., Olsen, N. R. B. and Vollmer, S. (2012) "Modelling fractionated sediment transport and deposition in the Iffezheim reservoir", 10th International Conference on Hydroinformatics, Hamburg, Germany.
Roberts, M., Rüther, N., Olsen, N. R. B. and Vollmer, S. (2012) "3D modelling of changes in sediment transport, bed composition and porosity during a flood event at the river Elbe", 10th International Coneference on Hydroinformatics, Hamburg, Germany.
Haun, S., Olsen, N. R. B. and Feurich, R. (2011), Numerical modelling of flow over a trapezoidal broadcrested weir (OpenAccess), Engineering Applications of Computational Fluid Mechanics, Vol. 5, No. 3, pp 397405.
Feurich, R., Boubée, J. and Olsen, N. R. B. (2011), Spoiler Baffles in Circular Culverts, Journal of Environmental Engineering. Vol. 137, No. 9. pp. 854857; doi:10.1061/(ASCE)EE.19437870.0000384.
Zinke, P., Olsen, N. R. B. and Bogen, J. (2011), 3D numerical modeling of levee depositions in a Scandinavian freshwater delta, Geomorphology 129, pp. 320333; doi:10.1016/j.geomorph.2011.02.027.
Bihs, H. and Olsen, N. R. B. (2011), Numerical Modeling of Abutment Scour with the Focus on the Incipient Motion on Sloping Beds, Journal of Hydraulic Engineering, No. 10, pp. 12871292. doi:10.1061/(ASCE)HY.19437900.0000401
Feurich, R. and Olsen, N. R. B. (2011), ThreeDimensional Modeling of Nonuniform Sediment Transport in an Sshaped Channel, Journal of Hydraulic Engineering, 137, 493 (2011); doi:10.1061/(ASCE)HY.19437900.0000321.
Feurich, R., Kettner, F. and Olsen, N. R. B. (2011) "ThreeDimensional Numerical Investigation of Spillway and Reservoir Hydraulics", 34th IAHR Congress, Brisbane, Australia.
Haun, S., Hoven, L., Olsen, N. R. B., Rodríguez Meza, C. R. and Lizano, L. (2011) "3D numerical modelling of sediment deposition and flushing in the Angostura reservoir, Costa Rica", 34th IAHR Congress, Brisbane, Australia.
Hillebrand, G. and Olsen, N. R. B. (2011) "Towards modeling consolidation of fine sediments upstream of the Iffezheim barrage, Upper Rhine River, Germany", RCEM 2011, The 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Beijing, China.
Klassen, I., Hillebrand, G., Olsen, N. R. B., Vollmer, S., Lehmann, B. and Nestmann, F. (2011) "Modeling fine sediment aggregation processes considering varying fractal dimensions", RCEM 2011. The 7th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Beijing, China.
Jacobsen, J. and Olsen, N. R. B. (2010), 3D numerical modelling of the capacity for a complex spillway, Water Management, Vol. 163, Issue WM6, pp. 283288.
Zinke, P., Olsen, N. R. B., Bogen, J. and Rüther, N. (2010), 3D modelling of the flow distribution in the delta of Lake Øyern, Norway, Hydrology Research, Vol, 41, No. 2, pp. 92103, doi:10.2166/nh.2010.018.
Rüther, N., Jacobsen, J., Olsen, N. R. B. and Vatne, G. (2010), Prediction of the three dimensional flow field and bed shear stresses in a regulated river in MidNorway, Hydrology Research, Vol, 41, No. 2, pp. 145152, doi:10.2166/nh.2010.064.
FischerAntze, T., Rüther, N., Olsen, N.R.B. and Gutknecht, D. (2010) Discussion on: "Threedimensional (3D) modeling of nonuniform sediment transport in a channel bend with unsteady flow", Journal of Hydraulic Research, Volume 48., No. 6, pp 824825.
Olsen, N. R. B. (2010) "Result assessment methods for 3D CFD models in sediment transport computations", 1st Conference of the European section of the IAHR, Edinburgh, Scotland. Download PDF file
Hillebrand, G. and Olsen, N. R. B. (2010) "Hydraulic characteristics of the open annular flume – experiment and numerical simulation", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.
Feurich, R. and Olsen, N. R. B. (2010) "Computation of bed deformation in an Sshaped channel using 3D numerical simulation", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.
Bihs, H. and Olsen, N. R. B. (2010) "Numerical investigations of local scour around a trapezoidal abutment using the finite volume method", 1st Conference of the European section of the IAHR, Edinburgh, Scotland.
Bihs, H., Olsen, N. R. B. and Stoesser, T. (2010) "Calculation of secondary flow in a straight open channel with RANS and LES", 6th Int. Symp. on Env. Hydrualics, Athens, Greece. Environmental Hydraulics, CRC Press, Vol. 2, pp. 955960.
Olsen, N. R. B., Aberle, J. and Koll, K. (2010) "Resolving large bed roughness elements with an unstructured hexahedral grid", RiverFlow 2010, Braunschweig, Germany.
Olsen, N. R. B. and Haun, S. (2010) "Free surface algorithms for 3D numerical modelling of reservoir flushing", RiverFlow 2010, Braunschweig, Germany.
Stoesser, T., Ruether, N. and Olsen, N. R. B. (2009), Calculation of Primary and Secondary Flow and Boundary Shear Stresses in a Meandering Channel, Advances in Water Resources, Vol. 33, No. 2, pp 158170, doi:10.1016/j.advwatres.2009.11.001.
FischerAntze, T., Ruether, N., Olsen, N. R. B and Gutknecht, D. (2009), 3D modeling of nonuniform sediment transport in a channel bend with unsteady flow, Journal of Hydraulic Research, Vol. 47, No. 5, pp. 670675.
Zinke, P., Ruether, N., Olsen. N.R.B., Eilertsen, R.S. (2009) "3D Modelling of morphodynamics in deltas due to Hydropower regulation", Proc. of the Annual Conference on Hydraulic Engineering: "Water power and climate change", Dresdner Wasserbauliche Mitteilung, Technical University Dresden, Germany.
Bihs H., Olsen N.R.B. (2009) "Three Dimensional Numerical Modeling of Complex Free Surface Flow over a Backward Facing Step", 5th National Conference on Computational Mechanics, MekIT' 09, Trondheim, Norway
Zinke, P. and Olsen, N. R. B. (2009) "Numerical modeling of water and sediment flow in a delta with natural vegetation", 33rd IAHR Congress, Vancouver, Canada.
FischerAntze, T., Olsen, N. R. B. and Gutknecht, D. (2008), Threedimensional CFD modeling of morphological bed changes in the Danube River (OpenAccess), Water Resources Research, Vol. 44, No. 9, W09422, doi:10.1029/2007WR006402.
Stoesser, T., Ruether, N. and Olsen, N. R. B. (2008) "NearBed Flow Behavior in a Meandering Channel", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 793799.
Rueter, N., Olsen, N. R. B. and Eilertsen, R. (2008) "3D modeling of flow and sediment transport over natural dunes", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 2, pp. 14791485.
Bihs, H. and Olsen, N. R. B. (2008) "Three dimensional numerical modeling of secondary flows in channels with longitudinal bedforms", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 179183.
Zinke, P., Olsen, N. R. B. and Sukhodolova, T. (2008) "Modeling of hydraulics and morphodynamics in a vegetated river reach", RiverFlow 2008, International Conference on Fluvial Hydraulics, Cesme, Izmir, Turkey, Vol. 1, pp. 367376.
Zinke, P., Olsen, N. R. B. and Ruether, N. (2008) "3D Modelling of the flow distribution in the delta of Lake Øyern (Norway)", International Conference on Hydroscience and Engineering, Nagoya, Japan, pp. 270280.
Eiletsen, R., Olsen, N. R. B., Ruether, N. and Zinke, P. (2008) "River bed changes in the Lake Øyeren delta distributaries over a threeyear period (2004  2007) as revealed by interferometric multibeam", International Geological Congress (IGC2008) Oslo, Norway.
Bihs, H. and Olsen, N. R. B. (2008) "Three dimensional numerical modeling of pier scour", Fourth International Conferece on Scour and Erosion, Tokyo, Japan.
Ruether, N. and Olsen, N. R. B. (2007), Modelling freeforming meander evolution in a laboratory channel using threedimensional computational fluid dynamics, Geomorphology, No. 89, pp. 308319, DOI: 10.1016/j.geomorph.2006.12.009.
Wilson, C. A. M. E., Guymer, I., Boxall, J. B. and Olsen, N. R. B. (2007), Threedimensional numerical simulation of solute transport in a meandering selfformed river channel, Journal of Hydraulic Research, Vol. 45, No. 5, pp. 610616, DOI:10.1080/00221686.2007.9521797.
Bihs H. and Olsen N.R.B. (2007) "ThreeDimensional Numerical Modeling of Contraction Scour", 32nd IAHR Congress, Venice, Italy.
Zinke, P. and Olsen N.R.B. (2007) "Modeling of sediment deposition in a partly vegetated open channel", 32nd IAHR Congress, Venice, Italy.
Bihs H. and Olsen N.R.B. (2007) "ThreeDimensional Numerical Modeling of Abutment Scour", Fifth International Symposium on Environmental Hydraulics, Tempe, USA
Wilson, C. A. M. E., Yagci, O., Rauch, H.P. and Olsen, N. R. B. (2006), 3D numerical modelling of a willow vegetated river/floodplain system, Journal of Hydrology, Vol. 327, July, pp. 1321, doi:10.1016/j.jhydrol.2005.11.027.
Stoesser, T., Rodi, W. and Olsen, N. R. B. (2006) "Large Eddy and RANS flow simulation above dunes", Flow Simulation in Hydraulic Engineering, Dresden, Germany, 911 March 2006.
Stoesser, T., von Terzi, D., Rodi, W. and Olsen, N. R. B. (2006) "RANS simulations and LES over dunes at low relative submergence ratios", 7th Int. Conf. on Hydroscience and Engineering, Philadelphia, USA, 1013 September 2006.
Ruether, N., Olsen. N.R.B. (2006) "Towards the prediction of freeforming meander formation using 3D computational fluid dynamics", Flow Simulation in Hydraulic Engineering, Dresden, Germany, 911 March 2006.
Ruether, N., Olsen. N.R.B. (2006) "3D modeling of transient bed deformation in a sinegenerated laboratory channel with two different width to depth ratios", Third International Conference on Fluvial Hydraulics, River Flow 2006, Lisbon, Portugal.
Viscardi, J. M., Pujol, A., Weitbrecht, V., Jirka, G. H. and Olsen, N. R. B. (2006) "Numerical Simulations on the Paraná de las Palmas River", Third International Conference on Fluvial Hydraulics, River Flow 2006, Lisbon, Portugal.
Ruether, N. and Olsen. N.R.B. (2005), Three dimensional modeling of sediment transport in a narrow 90° channel bend, Journal of Hydraulic Engineering, October, Vol. 131, pp. 917920, doi:10.1061/(ASCE)07339429(2005)131:10(917).
Ruether, N., Singh, J. M., Olsen, N. R. B. and Atkinson, E. (2005), Threedimensional modelling of sediment transport at water intakes, Proceedings of the Institution of Civil Engineers, UK, Water Management, Vol. 158, March, pp 17.
Olsen, N. R. B., Pegg, I, Molliex, J., Berger, H. and Fjeldstad, HP, (2005) "3D CFD mdelling of erosion in habitat improvement gravel", 31st. IAHR Congress, Seoul, Korea.
Ruether, N. and Olsen, N. R. B. (2005) "Advances in 3D modeling of freeforming meander formation from initially straight alluvial channels", 31st. IAHR Congress, Seoul, Korea.
Wildhagen, J., Ruether, N., Olsen, N. R. B. and Guymer, I. (2005) "Threedimensional modelling of sediment transport in a sharply curved meandering channel", 31st. IAHR Congress, Seoul, Korea.
Olsen, N. R. B. (2004), Closure to "Threedimensional CFD modeling of selfforming meandering channel", Journal of Hydraulic Engineering, Vol. 130, No 8, pp. 838839, doi:10.1061/(ASCE)07339429(2004)130:8(838).
Hedger, R. D., Olsen, N. R. B., George, D. G., Malthus, T. J. and Atkinson, P. M. (2004), Modelling spatial distributions of Ceratium hirundnella and Microcystis spp. in a small productive British lake, Hydrobiologia, 528 (13), pp. 217227, doi:10.1007/s1075000423491.
Jimenez, O., Rodriguez, C. and Olsen, N. R. B. (2004) "Sedimentation in the Angostura Reservoir, Studies and Experiences", 9th International Symposium on River Sedimentation, Yichang, China
Olsen, N. R. B., Pegg, I., Alfredsen, K. T., Fergus, T. and Fjeldstad, HP. (2004) "3D CFD modelling of sediment deposition in habitat improvement structures", 5th International Symposium on Ecohydraulics, Madrid, Spain.
Ruether, N. and Olsen. N.R.B. (2004) "Three dimensional modeling of sediment transport in a channel bend", Second International Conference on Fluvial Hydraulics, Naples, Italy. Balkema publishers, page 151154.
FischerAntze, T., Gutknecht, D. and Olsen, N. R. B. (2004) "3d numerical modelling of morphological bed changes in the Danube river", Second International Conference on Fluvial Hydraulics, Naples, Italy.
Wilson, C. A. M. E., Yagci, O., Olsen, N. R. B. and Rauch, H. P. (2004) "3D numerical modelling of vegetated compound channel flows", 6th International Conference on Hydroinformatics, Singapore.
Wilson, C. A. M. E., Stoesser, T. and Olsen, N. R. B. (2004) "Validation of a 3D Computational Dynamics Code in the Simulation of Meandering Compound Channel Flows", The Sixth International Conference on Hydroscience and Engineering, Brisbane, Australia.
Olsen, N. R. B. (2003), 3D CFD Modeling of a SelfForming Meandering Channel, Journal of Hydraulic Engineering, No. 5, May, pp 366372, doi:10.1061/(ASCE)07339429(2003)129:5(366).
Wilson C. A. M. E., Boxall J. B., Guymer I. and Olsen N. R. B. (2003), Validation of a 3D numerical code in the simulation of pseudonatural meandering flows, Journal of Hydraulic Engineering, Vol. 129, No. 10, pp 758768, doi:10.1061/(ASCE)07339429(2003)129:10(758).
Wilson C. A. M. E., Stoesser T., Olsen N. R. B. and Bates P. D. (2003), Application and Validation of Numerical Codes in the Prediction of Compound Channel Flows, Proceedings of the Institution of Civil Engineers, UK, Water and Maritime Engineering, No. 153, pp. 117128.
Ruether, N. and Olsen. N.R.B. (2003) "CFD modeling of meandering river evolution", XXX IAHR Congress, Thessaloniki, Greece.
Wilson, C. A. M. E., Olsen, N. R. B., Boxall, J. B. and Guymer, I. (2003) "Threedimensional numerical simulation of solute transport in a meandering channel" XXX IAHR Congress, Thessaloniki, Greece.
Ruether, N. and Olsen, N. R. B. (2003) "CFD modeling of alluvial channel instabilities", 3rd IAHR Symposium on River, Coastal and Estuarine Morphodynamics, Barcelona, Spain.
Hedger, R. D., Olsen, N. R. B., Malthus, T. J. and Atkinson, P. M. (2002) "Coupling remote sensing with computational fluid dynamics modelling to estimate lake chlorophylla concentration", Remote Sensing of Environment, Vol. 79, No. 1, pp. 116122.
Olsen, N. R. B. (2002) "Hydroinformatics, fluvial hydraulics and limnology", Department of Hydraulic and Environmental Engineering, The Norwegian University of Science and Technology. Download 1.3 MB PDF file.
FischerAntze, T., Stösser, T., Bates, P. and Olsen, N. R. B. (2001), 3D numerical modelling of openchannel flow with submerged vegetation, Journal of Hydraulic Research, Vol. 39, No. 3, pp 303310, doi:10.1080/00221680109499833.
Olsen, N. R. B. and Aryal, P. R. (2001) "3D CFD modelling of water flow in the sand trap of Khimti Hydropower Plant, Nepal", Hydropower 2001, Bergen, Norway.
Krüger, S. and Olsen, N. R. B. (2001) "Shockwave computations in channel contractions", XXIX IAHR Congress, Beijing, China.
Olsen, N. R. B., Hedger, R. D. and George, D. G. (2000), 3D Numerical Modelling of Microcystis Distribution in a Water Reservoir, Journal of Environmental Engineering, Vol. 126, No. 10, doi:10.1061/(ASCE)07339372(2000)126:10(949).
Olsen, N. R. B. and Lysne, D. K. (2000), Numerical modelling of circulation in Lake Sperillen, Norway, Nordic Hydrology, Vol. 31, No. 1, pp. 5772, doi:10.2166/nh.2000.005.
Olsen, N. R. B. (2000) "Unstructured hexahedral 3D grids for CFD modelling in fluvial geomorphology", Hydroinformatics 2000, Iowa, USA.
Olsen, N. R. B. (2000) "CFD modelling of bed changes during flushing of a reservoir", Hydroinformatics 2000, Iowa, USA.
Olsen, N. R. B. (1999), Twodimensional numerical modelling of flushing processes in water reservoirs, Journal of Hydraulic Research, No. 1, pp 316. abstract
Olsen, N. R. B. and Kjellesvig, H. M. (1999), Threedimensional numerical modelling of bed changes in a sand trap, Journal of Hydraulic Research, Vol. 37, No. 2. abstract, DOI:10.1080/00221689909498305.
Hedger, R.D., Olsen, N.R.B., George, D.G., Atkinson, P.M., Malthus, T.J. (1999) "Dynamic modelling of the spatiotemporal distribution of phytoplankton in a small productive lake", 4th International Conference on GeoComputation, Fredericksberg, USA.
Hedger, R.D., Olsen, N.R.B., Malthus, T.J., Atkinson, P.M. (1999) "The analysis of water quality spatial distributions in lakes by the integration of computational fluid dynamics with remote sensing", 25th Annual Conference of the Remote Sensing Society, Cardiff, UK.
Olsen, N. R. B. and Wilson, C. A. M. E. (1999) "CFD modelling of rivers and reservoirs", Int. Seminar on Optimum Use of RunofRiver Hydropower Schemes, Trondheim, Norway. abstract
Olsen, N. R. B., Jimenez, O. F., Abrahamsen, L. and Løvoll, A. (1999) "3D CFD modelling of water and sediment flow in a hydropower reservoir", International Journal of Sediment Reserach, Vol. 14, No. 1. abstract
Olsen, N. R. B. and Lysne, D. K. (1999) "3D Numerical Modelling of Water Currents in an IceCovered Lake", IAHR 28th. Bienneal Congress, Graz, Austria.
Olsen, N. R. B., Hedger, R. D. and George, D. G. (1999) "Modelling the Horizontal Distribution of Algae in a Water Supply Reservoir", IAHR 28th. Bienneal Congress, Graz, Austria.
Olsen, N. R. B., Kjellberg, G., Bakken, T. H. and Alfredsen, K. A. (1999) "Numerical modelling of water quality in Lake Mjøsa, Norway, during the flood of 1995", Ecohydraulics '99, Salt Lake City, USA. abstract
Olsen, N.R.B., Hedger, R. D., Heslop, S., George, D. G. (1999) "Computing spatial variation of algae in water supply reservoirs", International Conference on Computing and Control for the Water Industry, CCWI'99, Exeter, UK.
Olsen, N. R. B. (1999) "Computational Fluid Dynamics in Hydraulic and Sedimentation Engineering", Class notes, Department of Hydraulic and Environmental Engineering, The Norwegian University of Science and Technology. download PDF file
Olsen, N. R. B. and Kjellesvig, H. M. (1998), Threedimensional numerical flow modelling for estimation of maximum local scour depth, Journal of Hydraulic Research, No. 4, pp. 579590, DOI:10.1080/00221689809498610.
Olsen, N. R. B. and Kjellesvig, H. M. (1998), Threedimensional numerical flow modelling for estimation of spillway capacity, Journal of Hydraulic Research, No. 5, pp. 775784. DOI:10.1080/00221689809498602.
Hedger, R.D., Olsen, N.R.B., Malthus, T.J., Atkinson, P.M., George, D.G. (1998) "Dynamically modelling chlorophylla concentration in a remotely sensed image of Loch Leven", The 24th Annual Conference of the Remote Sensing Society, Greenwich, UK.
Olsen, N. R. B. and Heslop, S. (1998) "Flow visualisation by particle animation for 3D CFD modelling in hydraulic engineering", HYDROINFORMATICS '98, Copenhagen, Denmark.
Olsen, N. R. B. (1998) "Unstructured and nested grids for 3D CFD modelling in hydraulic engineering", HYDROINFORMATICS '98, Copenhagen, Denmark. abstract
Olsen, N. R. B. and Tjomsland, T. (1998) "3D CFD modelling of windinduced currents and radioactive tracer movements in a lake", 3rd. International Conference on Hydroscience and Engineering, Cottbus, Germany.
Olsen, N. R. B., Hedger, R. D., George, D. G. and Heslop, S. (1998) "3D CFD modelling of spatial distribution of algae in Loch Leven, Scotland", 3rd. International Conference on Hydroscience and Engineering, Cottbus, Germany. abstract
Olsen, N. R. B. (1997) "Computational Fluid Dynamics as a tool for prediction of reservoir flushing and sedimentation", Q 74 a), ICOLD Conference, Florence, Italy.
Olsen, N. R. B. (1997) "A framework for a 3D numerical model for hydropower reservoir water quality", HYDROPOWER '97, Trondheim, Norway.
Olsen, N. R. B. and Kjellesvig, H. M. (1997) "A 3D numerical model for determination of spillway capacity", HYDROPOWER '97, Trondheim, Norway.
Olsen, N. R. B. and Kjellesvig, H. M. (1997) "3D Numerical Modelling of Sediment Deposition and Bed Changes in a TunnelType Sand Trap", IAHR/ASCE Congress, San Fransisco, USA.
Olsen, N. R. B. and Melaaen, M. C. (1996) "Threedimensional numerical modelling of vortex shedding behind circular cylinders", 2nd. International Conference on Modelling, Testing and Monitoring for Hydro Powerplants", Lausanne, Switzerland.
Olsen, N. R. B. (1996) "Threedimensional numerical modelling of local scour", HYDROINFORMATICS 96, Zurich, Switzerland.
Olsen, N. R. B. and Stokseth, S. (1995), Threedimensional numerical modeling of water flow in a river with large bed roughness, Journal of Hydraulic Research, Vol. 33, No. 4., pp. 571581. abstract
Lovoll, A., Lysne, D. K. and Olsen, N. R .B. (1995) "Numerical and physical modelling of dynamic impact on structures from a flood wave", IAHR 26th. Biennial Congress, London.
Lysne, D. K., Olsen, N. R. B., Stole, H and Jacobsen, T. (1995) "Withdrawal of water from sediment carrying rivers. Recent developments in planning and operation of headworks", International Journal on Hydropower and Dams, March.
Olsen, N. R. B. and Tesaker, E. (1995) "Numerical and physical modeling of a turbidity current", IAHR 26th. Biennial Congress, London.
Olsen, N. R. B. and Oldervik, O. (1995) "Threedimensional numerical modeling of water flow through a gate plug", IAHR 26th. Biennial Congress, London.
Olsen, N. R. B. and Chandrashekhar, J. (1995) "Calculation of water and sediment flow in desilting basins", 6th. International Symposium on River Sedimentation, New Delhi, India.
Olsen, N. R. B. (1995) "Numerical modelling of hydropower reservoir flushing", International Conference on Hydropower into the next Century", Barcelona, Spain.
Olsen, N. R. B. and Skoglund, M. (1994), Threedimensional numerical modeling of water and sediment flow in a sand trap, Journal of Hydraulic Research, Vol. 32, No. 6,pp. 833844. abstract
Olsen, N. R. B., Jimenez, O., Lovoll, A. and Abrahamsen, L. (1994) "Calculation of water and sediment flow in hydropower reservoirs", 1st. International Conference on Modeling, Testing and Monitoring for Hydro Powerplants, Hungary.
Olsen, N. R. B. (1994) "Design of flusing pipes for sand traps", 1st. International Conference on Modeling, Testing and Monitoring for Hydro Powerplants, Hungary.
Olsen, N. R. B. and Alfredsen, K. (1994) "A threedimensional model for calculation of hydraulic parameters for fish habitat", IAHR Conference on Habitat Hydraulics, Trondheim, Norway. abstract
Olsen, N. R. B. (1994) "SSIIM  A threedimensional numerical model for simulation of water and sediment flow", HYDROSOFT94, Porto Carras, Greece.
Olsen, N. R. B. and Melaaen, M. C. (1993), Threedimensional numerical modeling of scour around cylinders, Journal of Hydraulic Engineering, Vol. 119, No. 9, September, abstract, doi:10.1061/(ASCE)07339429(1993)119:9(1048).
Olsen, N. R. B. and Melaaen, M. C. (1993) "Numerical Modeling of Erosion around a Cylinder and Sediment Deposition in a Hydropower Reservoir", Eight International Conference on Numerical Methods in Laminar and Turbulent Flow, Swansea, UK.
