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ir. M.R.A. Gensen (Matthijs)

About Me

In 2014 I attained my Bachelor's degree in Civil Engineering at the University of Twente. I performed my BSc thesis at the University of Tasmania on the topic of flood risk in eastern Australia under climate variability and climate change. In march 2017 I attained a Master's degree in Hydraulic engineering from the Technical University of Delft. Since September 2017 I am employed at the University of Twente as a PhD candidate. I am working in the Marine and Fluvial Systems group of the Water Engineering and Management department. My research is on large-scale uncertainties in river water levels.

 

Expertise

Earth & Environmental Sciences
Bifurcation
Distribution
Rating Curve
River
River System
Roughness
Water Budget
Water Level

Research

My research focusses on the modelling of water level uncertainty in river systems. Water levels determine the main dynamic load on the 1430 km river dikes in the Netherlands. In January 2017, the new risk-based flood protection policy was adopted by the Dutch government. This policy implies that flood defence safety no longer depends on a single water level. Instead, the full range of possible water levels now control flood defence safety. This requires new insight in the probability of occurrence of water levels in the Dutch rivers. Large-scale river interventions have been carried out, but their hydraulic effects were studied only deterministically, in spite of inherent uncertainty. This uncertainty is dominated by the discharge distribution over the river branches at bifurcation points, which is in turn influenced by regulation structures, large-scale roughness of river branches due to bed form dynamics and river interventions. Knowledge of their effects on water levels is essential in future planning of river interventions for flood defence reliability.

The goal of this project is to quantify and possibly reduce the water level uncertainty in a bifurcating river system for a range of water levels to support more accurate and robust dike designs and improved management strategies for the river system. Uncertainty analysis methods are applied to quantify and propagate the main uncertainty sources to the water levels. This project focusses on the combined effect of natural processes and large-scale river interventions to improve river maintenance strategies.

Publications

Recent
Gensen, M. R. A. , Warmink, J. J. , Huthoff, F. , & Hulscher, S. J. M. H. (2021). Analysis of water balance and discharge distribution at river bifurcations using Bayesian rating curves. 4. Abstract from 8th International Conference on Flood Management 2021, Iowa City, Iowa, United States.
Gensen, M. R. A. , Warmink, J. J. , Berends, K. D. , Huthoff, F. , & Hulscher, S. J. M. H. (2021). Rating curves with a closing water balance in the bifurcating Rhine River in the Netherlands. 242. Abstract from 4th International Conference on the Status and Future of the World's Large Rivers, Moscow, Russian Federation.
Horn, G. , Huthoff, F. , Hulscher, S. J. M. H. , Warmink, J. J. , Gensen, M. R. A., & Twijnstra, J. J. (2020). Water balance in the Dutch river Rhine and rating curve uncertainty. In W. Uijttewaal, M. J. Franca, D. Valero, V. Chavarrias, C. Ylla Arbos, R. Schielen, & A. Crosato (Eds.), River Flow 2020: Proceedings of the 10th Conference on Fluvial Hydraulics (Delft, Netherlands, 7-10 July 2020) (pp. 2171-2178). CRC Press/Balkema. https://doi.org/10.1201/b22619-304
Gensen, M. R. A. , Warmink, J. J. , Hulscher, S. J. M. H. , & Huthoff, F. (2020). Effects of a river intervention on water levels in a bifurcating river system. In W. Uijttewaal, M. J. Franca, D. Valero, V. Chavarrias, C. Ylla Arbos, R. Schielen, & A. Crosato (Eds.), River Flow 2020: Proceedings of the 10th Conference on Fluvial Hydraulics (Delft, Netherlands, 7-10 July 2020) (pp. 1890-1898). CRC Press/Balkema.
Berends, K. D. , Gensen, M. R. A. , Warmink, J. J. , & Hulscher, S. J. M. H. (2020). Thirty-year analysis of a changing river system using Bayesian rating curves. In W. Uijttewaal, M. J. Franca, D. Valero, V. Chavarrias, C. Ylla Arbos, R. Schielen, & A. Crosato (Eds.), River Flow 2020: Proceedings of the 10th Conference on Fluvial Hydraulics (Delft, Netherlands, 7-10 July 2020) (pp. 1022-1026). CRC Press/Balkema.

Affiliated Study Programmes

Bachelor

Master

Courses Academic Year  2020/2021

Contact Details

Visiting Address

University of Twente
Drienerlolaan 5
7522 NB Enschede
The Netherlands

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Mailing Address

University of Twente
P.O. Box 217
7500 AE Enschede
The Netherlands

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