ir. A. Bomers MSc (Anouk)

PhD Candidate on historic flood modelling




Dutch water policy is currently changing towards a risk based approach, which leads to a significant increase of safety levels expressed in recurrence times in areas where consequences of a flood are large (1:10,000 and higher). The traditional flood frequency method (based on extrapolation of historical records of only 110 years) yields large uncertainties in predicting design discharges corresponding to extremely large recurrence times. Therefore, the alternative method GRADE was developed. Validation must be performed to evaluate if GRADE is indeed capable of predicting design discharges for the Dutch river system with a smaller uncertainty interval than the traditional method. Reconstructions of historic floods will provide useful knowledge that can be used for this validation process. Therefore, Anouk will focus during her PhD-project on the parametrization and translation of hydraulic characteristics of the river and floodplains of the various historical years and use this as input for the hydraulic models to reconstruct past flood magnitudes.


Bomers, A., Hulscher, S. J. M. H., Lammersen, R., & Schielen, R. M. J. (2018). The effect of dike breaches on downstream discharge partitioning near a river bifurcation. In A. Armanini, & E. Nucci (Eds.), New Challenges in Hydraulic Research and Engineering: Proceedings of the 5th IAHR Europe Congress (pp. 805-806). Research Publishing. DOI: 10.3850/978-981-11-2731-1_070-cd
Bomers, A., Schielen, R. M. J., & Hulscher, S. J. M. H. (2018). Flood patterns in the Old IJssel Valley. 126-127. Abstract from NCR Days 2018, Delft, Netherlands.
van der Meulen, B., Deggeller, T. S., Bomers, A., Cohen, K. M., & Middelkoop, H. (2018). The historical river: morphology of the Rhine before river normalization. 44-45. Abstract from NCR Days 2018, Delft, Netherlands.
Bomers, A., Schielen, R. M. J., & Hulscher, S. J. M. H. (2017). Benchmark study of numerical model grids to study historic floods of the river Rhine. 1-3. Abstract from 4th International Symposium on Shallow Flows, ISSF 2017, Eindhoven, Netherlands.
Other Contributions

Conference proceedings

  • Bomers, A., Aguilar-Lopez, J.P., Warmink, J.J., Hulscher, S.J.M.H. (2016). Modelling erosion development during wave overtopping of an asphalt road covered dike, FLOODrisk2016 – 3rd European Conference on Flood Risk Management, Innovation, Implementation and Integration, Lyon, France.
  • Schielen, R.M.J., Bomers, A., Kroekenstoel, D. (2014). Unraveling the contributions of wind, sea level and discharge to design water levels in the Dutch delta. Proc. 7th River Flow Congress, Lausanne, Switzerland, pp. 1729-1736.


  • MSc thesis Road impact on erosion development during overtopping flood events
  • BSc thesis Kansbijdragen van de verschillende stochasten in het benedenrivierengebied 

UT Research Information System


Courses Bachelor Civil Engineering:

  • Design project Civil Engineering, Bsc level, 2016-now

Courses Master Civil Engineering and Management:

  • Design Project Water, MSc level, 7.5 EC, 2015-now
    Responsible for modelling part of the course
  • River Dynamics, Msc level, 7.5 EC, 2017-now
    Supervising the tutorials

Supervision of Bsc graduation  project:

  • R. de Boer, 2016: The effect of retaining water extremes in nature areas on water policy, Waterboard Reest & Wieden
  • J. Willink, 2017: Procces change analysis Waterboard Rijn & IJssel

Affiliated Study Programmes




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Contact Details

Visiting Address

University of Twente
Faculty of Engineering Technology
Horst Complex (building no. 20), room W207
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Engineering Technology
Horst Complex  W207
P.O. Box 217
7500 AE Enschede
The Netherlands