Nils Ruther’s research interests are mainly within the fields of numerical modeling of sediment transport, fluvial hydraulics, environmental river mechanics and basic sediment transport. In addition he is very interested in ecohydraulics and hydraulic structures like hydro power intakes and settling basins.
Nils Rüther studied civil engineering at the Technical University of Karlsruhe and finished in 2001 with the specialization on hydraulic engineering. After a short period being research associate at the University of Karlsruhe, he moved to Trondheim in October 2002 and started a Ph.D. study under the supervision of Prof. Nils Reidar Olsen. Nils Rüther defended his thesis with the title “Computational fluid dynamics in fluvial sedimentation engineering” in November 2006. He published five papers during that period, of which one won the Coopers Hill War Memorial Prize for the fourth best paper in the Proceedings of the ICE – Water Management, in 2005. Nils Rüther was then working as a postdoctoral researcher on the 3D numerical modeling of delta and local scour formations. In 2009 he became Associate Professor at the department of hydraulic and environmental engineering. Since 2011, Nils Rüther is the head of hydraulic engineering research group. At present he is mostly involved in projects of CEDREN. He is workpackage leader of HydroPEAK WP7 “Physical effects of load fluctuations rivers and reservoirs”. The focus is on the effect of highly unsteady flow on the sediment transport. In addition is is highly involved in EnviPEAK A1 and A2. Here, the focus is on how hydro power peaking effects the ecology of the river including the substrate of the river bed. The picture at the top of this pages is taking during field measurements (2011) in river Surna, taking freeze core samples to quantify the substrate composition. .
Nils Rüther teaches two graduate courses, TVM 5125, Hydraulic Design, since fall 2009 and TVM 5160, Headworks and sedimentation engineering, from fall 2013. He is also in charge for one Ph.D. course, VM8107, Topics in hydraulics.  Since he became Associated Prof. in 2009 he was supervising nine Master students and three Bachelor students.
Internationally he is very active, too. In Germany he is member of the German Association for Water, Wastewater and Waste, DWA, and a member of the working group on numerical models for sediment transport. Furthermore he is currently collaborating with Dr. Massimo Guerrero, University of Bologna, Dr. Sandor Baranya, Budapest University of Technology and Economics and Prof. Thorsten Stösser, Cardiff University. He is also involved in project works at the Federal Institute of Hydrology in Koblenz, Germany.

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