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Dr. R.M.J. (Ralph) Schielen
Water Engineering and Management Horst W-108
+31 53 489 4768
(+31) 6 10428766
+31 53 4893546
University of Twente
Faculty of Engineering Technology
Department of Water Engineering & Management
P.O. Box 217
7500 AE Enschede
- 1995: Ph. D. degree at Utrecht University. Nonlinear stability analysis and pattern formation in morphological models. Promotor: Prof. Dr. W. Eckhaus, Co-promotor: Prof. Dr. A. Doelman.
- 1990: M. Sc. Applied Mathematics, Utrecht University. M. Sc. Thesis on nonlinear analysis of large scale river bedforms.
- 2000-date: Senior Researcher River Management at the Ministry of Transport, Public Works and Water Management, at the Centre for Water Management.
- 1996-1997: Post doc position at University of Amsterdam, Faculty of Human Movement Science. Study on the analysis of the gait.
You can click here for a Dutch cv of Ralph Schielen.
Ralph Schielen has a position as assistant professor (guest researcher) for one day a week at Twente University. His main function is to act as an intermediary between the Ministry of Transport, Public Works and Water Management on one hand, and the University of Twente on the other hand. Subjects that are of importance for the Ministry can be studied in more detail by students or PhD candidates of the university. Also, interesting developments at the university will be noted in an early stage and may be of benefit for the Ministry. He will signal relevant developments
Ralph Schielen was involved the supervision Dr. A. Paarlberg, who studied the formation of dunes in rivers, and the consequences for roughness and hence water-level prediction. Dr. Paarlberg defended his PhD-thesis successfully on August 28, 2008.
He was also involved in the supervision of Ir. J. Janssen, who studies the integration of qualitative and quantitave model concepts. More precisely, she investigates how the match between models which describe long term river management problems, and their end-users can be improved by incorporating qualitative knowledge and uncertainty information. Mrs. Janssen defended her PhD-thesis on September 19, 2009.
Meanwhile, he supervised MsC-students (dealing with for instance building houses on piles in floodplains, and with design-rules for side channels in river restoration).
At the Ministry of Transport, he coordinates the morphological and hydraulic activities which are carried out in the National Program Space for the River (www.ruimtevoorderivier.nl). He is now shifting his interest towards long term evolution of the Dutch river area (long term discharges, connections with the Veerman-committee (www.deltacommissie.com) and dealing with multiple spatial claims on the floodplains).
He is also involved in several MOU’s of the Ministry, to propagate the ideas and working methods if the Ministry. Some of the activities are listed below:
Joint Scientific Thematic Research Programme (JSTP), Workshop on 'Integrated water management in relation to climate change and sea level rise', 13-14 May, 2009, Beijing, China.
Mission China, South-North Water Diversion Project, 12-16 November, 2007, Nanjing, China.
Working visit Tisza Valley, Hungary, 1-4 Oktober 2007.
Mission China, South-North Water Diversion Project, 31 maart-5 april 2007, Nanjing, Jinan, China.
Round Table Conference “Water and Water Management”, 9-10 november 2006, Budapest, Hongarije.
European Territorial Cooperation (ETC), Workshop on Integrated Flood Alleviation Measures, 1-2 juni 2006, Utrecht, Nederland.
The 6-th Sino-Dutch Joint-Steering Committee Meeting, 6 juli 2005, Zhengzhou, China.
CIWEM RCG Trip to the Rhine, September 2005, Nijmegen, Nederland.
Flomia, Search conference Flood Mangement, 13-15 April 2005, Caciulata, Roemenië.
Gemeinsame internationale Fachtagung “Hochwasserschutz durch nachhaltige
einzugsgebietsbewirtschaftung-strategien und beispiele, 29 juni 2004, Magdeburg, Germany.
Challenges of Flood Management in the 21-st century, 2-4 oktober 2003, Szolnok, Hongarije
First International Scientific Meuse-symposium of the ICBM (International commission for the protection of the Meuse), 27-28 november 2002, Maastricht
Decision Support Systems, International Workshop, 6 april 2000, Koblenz, Germany
On Dunes and bars
Marco Colombini, Alessandro Stocchino & Ralph Schielen (2009), Weakly nonlinear dynamics of dunes, accepted for 6th Symposium on River, Coastal and Estuarine Morhodynamics, RCEM 2009, 21-25 september 2009, Santa Fé, Argentina.
Paarlberg, A.J., C.M. Dohmen-Janssen, S.J.M.H. Hulscher, R. Schielen and A.P.P. Termes. Modelling dynamic roughness in rivers during floods. Submitted to: J. of Hydr. Eng.
Paarlberg, A.J., C.M.Dohmen-Janssen, S.J.H.M. Hulscher, R. Schielen and A.P.P Termes (2008). Modelling dynamic roughness in rivers during floods. In .R. Parsons, T. Garlan, and J.L. Best (eds). Proc. Of the 3rd workshop on Marine Sandwave and River Dune Dynamics (MARID), 1-3 April 2008, Leeds, UK, pp. 257-264
R. Schielen, P. Zegeling en T. van Leeuwen (2005). Numerical analysis of alternating bars , In Parker, A and Garcia, M. (eds), Proceedings of the 4th symposium on River, Coastal en Estuarine Morphodynamics, RCEM2005, Urbana, Illinois, USA, 2005
R. Schielen and A. Doelman (1998), Modulation equations for spatially periodic systems: derivation and solutions, SIAM J. of Applied Math. (58) 6, pp1901-1930
R. Schielen (1995), Nonlinear Stability Analysis and Pattern Formation in Morphological Models, PhD-thesis Utrecht University.
A. Doelman, W. Eckhaus, R. Kuske, R. Schielen (1995) `Pattern formation in systems on spatially periodic domains' pp. 85-105 in `Nonlinear Dynamics and Pattern Formation in the Natural Environment' (A. Doelman, A. van Harten (eds.)), Longman, UK; Pitman Research Notes in Mathematics 335 .
R. Schielen, A. Doelman, H.E. de Swart (1993) `On the nonlinear dynamics of free bars in straight channels' J. Fluid Mech. 252 325-356.
Development of a Decision Support System and analysis of retention options along the Lower Rhine river", ISSN 1568-234X, NCR-publication nr13-2001
Schielen, R.M.J. (1995) Ph.D. Thesis at Utrecht University. Nonlinear stability analysis and pattern formation in morphological models.
On Dealing with Qualitative Information and uncertainty in river management problems, and on Decision Support Systems
Janssen, Judith A.E.B. and Hoekstra, Arjen Y. and Kok de, Jean-Luc and Schielen, Ralph M.J. (2009) Delineating the Model-Stakeholder Gap: Framing Perceptions to Analyse the Information Requirement in River Management. Water Resources Management, 23 (7). pp. 1423-1445. ISSN 0920-4741
Janssen, Judith A.E.B. and Hoekstra, Arjen Y. and Kok de, Jean-Luc and Schielen, Ralph M.J. (2009) Delineating the Model-Stakeholder Gap: Framing Perceptions to Analyse the Information Requirement in River Management. Water Resources Management, 23 (7). pp. 1423-1445. ISSN 0920-4741 (http://dx.doi.org/10.1007/s11269-008-9334-9)
Janssen, J. A. E. B., & Schielen, R. (2006). The mind in the model - Modelling expert knowledge with fuzzy sets. In A.G. van Os (Ed.), NCR-days 2006, Book of abstracts, November 2-3 2006, Enschede (pp. 14-14). Delft: NCR.
Janssen, J. A. E. B., J.-L. de Kok, A. Y. Hoekstra and R. M. J. Schielen (2006) ‘Incorporating qualitative indicators to support river managers; application of fuzzy sets’, in: Voinov, A., Jakeman, A., Rizzoli, A. (eds). Proceedings of the iEMSs Third Biennial Meeting: "Summit on Environmental Modelling and Software". International Environmental Modelling and Software Society, Burlington, USA, July 9-13, 2006
Janssen, J. A. E. B., J.-L. de Kok, M. S. Krol, S. J. M. H. Hulscher and R. M. J. Schielen (2004b) ‘Rapid assessment methodology for river management with application to the lower Meuse – proposed research’, in: A. Makaske, H. P. Wolfert and A. van Os (eds.), Proceedings of the NCR-days 2004: Research for managing rivers: present and future issues, NCR-Publication 26-2005, pp. 40-41, Delft, the Netherlands
R. Schielen and P. Gijsbers: DSS Large Rivers (2003): Developing a DSS under changing societal environment, Physics and Chemistry of the Earth (2003), 28: pp 635-645
R.M.J. Schielen, C.A. Bons, P.J.A. Gijsbers and W.C. Knol (2001), "Interactive Flood Management and Landscape Planning in River Systems: Development of a Decision Support System and analysis of retention options along the Lower Rhine river", ISSN 1568-234X, NCR-publication nr13-2001
On River Management Issues in General
H.H,. Havinga, R.M.J. Schielen and S. Van Vuren (2009). Tension between navigation, maintenance and safety calls for an integrated planning of flood protection measures, accepted for 6th Symposium on River, Coastal and Estuarine Morhodynamics, RCEM 2009, 21-25 september 2009, Santa Fé, Argentina.
In Altinakar, Kokpinar, Aydin, Cokgor & Kirkgoz (eds), proc. of the 4th international conference on fluvial hydraulics Riverflow 2008, 3-5 september 2008, Izmir, Turkey.
R.M.J. Schielen and G. Roovers (2008). Adaptation as a way of flood management, Proc. Of the 4th International Symposium on Flood Defence: Managing Flood Risk, Reliability and Vulnerability Toronto, Ontario, Canada, May 6-8, 2008
R. Schielen, P. Jesse and L. Bolwidt (2006), On the use of flexible spilllways to control the discharge distribution of the Rhine in the Netherlands: hydraulic and morphological observations, Netherlands Journal of Geosciences-Geologie en Mijnbouw (2007), 86-1, pp. 319-330.
R.M.J. Schielen (2006), On the role of the civil society in ‘Room for the River’ in the Netherlands, Book of Abstracts of Man and River Systems II, Paris, France, 4-6 december 2006.
Harke, J., Ribberink, J. S., Schielen, R., & Maarel, T. van der (2006). Building on piles in floodplains. In A.G. van Os (Ed.), NCR-days 2006, Book of abstracts, November 2-3 2006, Enschede (pp. 31-31). Delft: NCR.
J. Reuber, R. Schielen und H. Barneveld (2006), Die Maas im 21. Jahrhundert-Integrale Lösungsansatze zur Hochwasserproblematik, Wasserwirtschaft, juni 2006.
K. Blanckaert, A. Wijbenga, F. Bushman and R. Schielen (2006). Redistribution of velocity and bed shear stress in straight and curved open channel by means of a bubble screen, Journal of Hydraulic Engineering, 132(10), page 1076-1085
A. Wijbenga, R. Schielen, K. Blanckaert and F. Bushman (2006). Secondary flow and Velocity redistribution by bubble screens in open channel bends. In Ferreira, R, Alves, E., Leal, J. and Cardaso, A. (eds), Proceedings of the third international conference on fluvial hydraulics Riverflow 2006, Lissabon, Portugal.