dr. J.J. Warmink (Jord)

Associate Professor

About Me

My scientific interests revolve around pioneering research to develop sustainable solutions for flood risk management. In my career, I focus on generating fundamental understanding of water-soil interactions combining both data analysis and numerical modelling methods. Additionally, developing practical design tools is essential to make sure this knowledge is utilized.

I carried out flume and field experiments to study hydrodynamics, morphodynamics and vegetation characteristics for calibration and validation of models. I developed numerical modelling and uncertainty analysis techniques that enhance our understanding of physical processes, enable predictions of the effectiveness of interventions, and translate into decision support tools with end-users.

My current research advances numerical modelling for dike cover erosion, experimental tests for improving sea wall design and stochastic modelling frameworks for flood management. This knowledge feeds into more accurate process-based models of dike covers and tools for flood risk reduction.

Building upon these insights, I aim to ultimately develop accurate yet efficient models simulating the long-term behaviour of dike covers as a solutions for flood protection. Such models will help to understand, predict and assess the feasibility of solutions and provides essential decision support tools for flood risk management.


Earth & Environmental Sciences
Water Level
Engineering & Materials Science


van Oostrum, M. A. , Lokin, L. , Warmink, J. J. , & Hulscher, S. J. M. H. (2022). The effect of longitudinal training dams and groyne lowering on river dunes. In A. Blom, L. M. Stancanelli, J. A. Dercksen, C. Ylla Arbós, M. K. Chowdhury, S. M. Ahrendt, C. Piccoli, K. Sloff, J. H. Slinger, & R. M. J. Schielen (Eds.), Anthropogenic Rivers: NCR DAYS 2022 Proceedings (pp. 76-77). Netherlands Centre for River Studies.
Bongers, P. S. J. , Lokin, L. , Warmink, J. J. , Hulscher, S. J. M. H., Vrijaldenhoven, B. M. A. J., & Verbeek, M. C. (2022). Het effect van scheepvaart op de ontwikkeling van rivierduinen. Land + water, 2022(1/2), 28-29.
Other Contributions

Peer reviewed journal publications

  • Van Bergeijk, V.M., Warmink, J.J., Van Gent, M.R.A. & Hulscher, S.J.M.H. (2019). An analytical model of wave overtopping flow velocities on dike crests and landward slopes. Coastal Engineering. https://doi.org/10.1016/J.COASTALENG.2019.03.001 
  • Berends, K.D., Straatsma, M.W., Warmink, J.J. & Hulscher, S.J.M.H. (2019). Uncertainty quantification of flood mitigation predictions and implications for interventions. Natural Hazards and Earth System Sciences, 19, 1737-1753. https://www.nat-hazards-earth-syst-sci.net/19/1737/2019/ 
  • Berends, K.D., Scheel, F., Warmink, J.J., de Boer, W.P., Ranasinghe, R. & Hulscher, S.J.M.H. (2019). Towards efficient uncertainty quantification with high-resolution morphodynamic models: A multifidelity approach applied to channel sedimentation. Coastal Engineering, 152, 103520. https://doi.org/10.1016/j.coastaleng.2019.103520 
  • Berends, K.D., Warmink, J.J. & Hulscher, S.J.M.H. (2018). Efficient uncertainty quantification for impact analysis of human interventions in rivers. Environmental Modelling & Software, 107, 50–58. https://doi.org/10.1016/j.envsoft.2018.05.021 
  • Aguilar-López, J.P., Warmink, J.J., Bomers, A., Schielen, R.M.J. & Hulscher, S.J.M.H. (2018). Failure of Grass Covered Flood Defences with Roads on Top Due to Wave Overtopping: A Probabilistic Assessment Method. Journal of Marine Science and Engineering, 6(3), 74. https://doi.org/10.3390/jmse6030074 
  • Bomers, A., Aguilar-López, J.P., Warmink, J.J., & Hulscher, S. J. M. H. (2018). Modelling effects of an asphalt road at a dike crest on dike cover erosion onset during wave overtopping. Natural Hazards, 93(1), 1–30. https://doi.org/10.1007/s11069-018-3287-y 
  • Warmink, J. J., Brugnach, M., Vinke-de Kruijf, J., Schielen, R. M. J., & Augustijn, D. C. M. (2017). Coping with Uncertainty in River Management: Challenges and Ways Forward. Water Resources Management, 31(14), 4587–4600. https://doi.org/10.1007/s11269-017-1767-6 
  • Aguilar-López, J.P., Warmink, J.J., Schielen, R.M.J. & Hulscher, S.J.M.H. (2018). Piping erosion safety assessment of flood defences founded over sewer pipes. European Journal of Environmental and Civil Engineering, 22(6), 707-735. https://doi.org/10.1080/19648189.2016.1217793 
  • Sebok, E., Refsgaard, J.C., Warmink, J.J., Stisen, S., Jensen, K.H. (2016) Using expert elicitation to quantify catchment water balances and their uncertainties. Water Resources Research 52(7):5111-5131, DOI:10.1002/2015WR018461
  • Aguilar-López, J.P., Warmink, J.J.Schielen, R.M.J.Hulscher, S.J.M.H. (2016) Soil stochastic parameter correlation impact in the piping erosion failure estimation of riverine flood defences. Structural Safety 60:117-129, DOI:10.1016/j.strusafe.2016.01.004
  • Warmink, J.J. (2014) Dune dynamics and roughness under gradually varying flood waves, comparing flume and field observations. Advances in Geosciences 39:115-121, DOI:10.5194/adgeo-39-115-2014
  • Warmink, J.J., Dohmen-Janssen, C.M., Lansink, J., Naqshband, S., Van Duin, O.J.M., Paarlberg, A.J., Termes, A.P.P., Hulscher, S.J.M.H. (2014). Understanding river dune splitting through flume experiments and dune evolution model analysis. Earth Surface Processes and Landforms 39(9):1208-1220. DOI:10.1002/esp.3529
  • Warmink, J.J., Straatsma, M.W., Huthoff, F., Booij, M.J., Hulscher, S.J.M.H. (2013). Uncertainty of design water levels due to combined bed form and vegetation roughness in the Dutch river Waal. Journal of Flood Risk Management 6(4):302-318. DOI:10.1111/jfr3.12014 (Outstanding paper award)
  • Warmink, J.J., Booij, M.J., Van der Klis, H., Hulscher, S.J.M.H. (2013). Quantification of uncertainty in design water levels due to uncertain bed roughness in the Dutch river Rhine. Hydrological Processes 27(11):1523-1680, DOI:10.1002/hyp.9319
  • Warmink, J.J., Van der Klis, H., Booij, M.J., Hulscher, S.J.M.H. (2011). Identification and quantification of uncertainties in a hydrodynamic river model using expert opinions. Water Resources Management 25(2):601-622. DOI:10.1007\s11269-010-9716-7
  • Warmink, J.J., Janssen, J.A.E.B., Booij, M.J., Krol, M.S. (2010) Identification and classification of uncertainties in the application of environmental models. Environmental Modelling and Software 25(12):1518-1527. DOI:10.1016/j.envsoft.2010.04.011
  • Van der Keur, P., Brugnach, M., Dewulf, A., Refsgaard,  J.C., Zorilla, P., Poolman, M., Isendahl, N., Raadgever, G.T., Henriksen, H.J., Warmink, J.J., Lamers, M., Mysiak, J. (2010) Identifying Uncertainty Guidelines for Supporting Policy Making in Water Management Illustrated for Upper Guadiana and Rhine Basins. Water Resources Management 24(14):3901-3938. DOI:10.1007/s11269-010-9640-x
  • Straatsma, M.W., Warmink, J.J., Middelkoop, H. (2008) Two novel methods for field measurements of hydrodynamic density of floodplain vegetation using terrestrial laser scanning and digital parallel photography. International Journal of Remote Sensing 29(5):1595-1617. DOI:10.1080/01431160701736455


  • Aguilar-López, J.P. (2016) Probabilistic Safety Assessment of Multi-functional Flood Defences. PhD thesis, University of Twente, The Netherlands, ISBN 978-90-365-4258-6. DOI:10.3990/1.9789036542586.
  • Warmink, J.J. (2011) Unraveling Uncertainties, the effect of hydraulic roughness on design water levels in river models. PhD thesis, University of Twente, The Netherlands, ISBN 978-90-365-3227-3. DOI:10.3990/1.9789036532273 (to receive a hardcopy, please contact me)

Book chapters

  • Thompson, M., Warmink, J.J. (2017). Natural hazard modelling and uncertainty analysis. Ch.2 in K. Riley et al. (Eds.) Natural hazard uncertainty assessment, modelling and decision support. AGU and Wiley, US. ISBN: 978-1-119-02786-7, Pages 11-19.
  • Warmink, J.J., Booij, M.J. (2015). Uncertainty analysis in river modelling. Ch.11 in: Rowinski, P., Radecki-Pawlik, A. (Eds.) Rivers - physical, fluvial and environmental processes. Geoplanet: Earth and Planetary Sciences series, DOI:10.1007/978-3-319-17719-9, Springer, Switserland. Pages 255-277.
  • Straatsma, M.W., Warmink, J.J., Middelkoop, H. (2007). Two novel methods for field measurements of hydrodynamic density of floodplain vegetation using terrestrial laser scanning and digital parallel photography. In M.W. Straatsma, Nederlandse Geografische Studies Issue 358, 2007, Pages 111-128.

UT Research Information System

Google Scholar Link


Bachelor Civil Engineering

  • 2016-now Coordinator and developer minor module 9: Smart Cities – Multifunctional Flood defences, 15 EC. Role: coordination, teaching, guest lectures, excursion, designing exercises, assignments, examination and grading.
  • 2015-2016 BSc design project Civil Engineering, 7.5 EC, Lecturing and responsible for modelling part of the course.
  • 2013-2015 Mentoring first year students, Tutor of first year BSc project group in Module 1, 15 EC.
  • 2007-2012 Fluid Dynamics, BSc level, 7.5 EC, Designing exercises and assignment computer practical, grading.
  • 2007-2011 Introduction Water Management, BSc level, 7.5 EC, Designing and grading of assignments, developing flood-damage model.

Master Civil Engineering & Management

  • 2015-now Coordinator MSc track Integrated Civil Engineering Systems (interdisciplinary MSc profiles). Developing new tracks, student counselling.
  • 2011-now Hydraulic Engineering, MSc course 5 EC, Set-up of course: coordination, writing syllabus, arranging guest lectures, excursion, designing exercises, assignments, examination and grading.
  • 2014-2016 Design Project Water, MSc course 7.5 EC, Assisting in project supervision, grading. Responsible for modelling part of the course
  • 2011-2014 River Systems, MSc course 2.5 EC, Entire set-up of course: coordination, designing lectures and exercises, assignments, giving oral lectures, excursion, examination and grading

Supervising MSc projects:

  • 2019   S. Westerhof (uncertainty of flood safety standards in NL), RHDHV.
  • 2019   M. Kriebel (grass cover strength of the new Afsluitdijk design), Witteveen+Bos.
  • 2019   M. Frankena (evaluation of transitions in grass covers), Deltares.
  • 2018   S. De Roover (uncertainty of coastline projections in Japan), IHE.
  • 2018   S. Roelofs (reducing uncertainty in piping assessment), BZIM.
  • 2018   M. Krol (cascade effects in flood damage predictions), Nelen & Schuurmans.
  • 2018   A. Rojals (sand dune predictions for dredging applications), DEME group.
  • 2018   M. Castelijns (effective work instructions for emergency measures), Deltares.
  • 2018   B. Domhof (river bed form roughness derived from calibration), Deltares.
  • 2017   J. Bink (acceptable levels of uncertainty in dike stability assessment), BZIM.
  • 2017   M. Lamers (morphological reponse of river Overijsselse Vecht), Vechtstromen.
  • 2016   R. Daggenvoorde (Upper stage plane bed in the Rhine branches), HKV.
  • 2016   N. Nijborg (ship erosion and permeability of Twentekanalen), RWS, Deltares.
  • 2016   S. Grin (temporal control measures for the IJssel-Vecht delta), WDODelta.
  • 2015   J. Van Stokkum (measurement density effect on the flood risk), BZIM.
  • 2015   R. Holscher (development of a new bedform predictor), UTwente
  • 2015   J. Hoeve (turbulence modelling for the design of scour protection), Arcadis        (nominated for Waterbouwprijs 2016)
  • 2014   A. Bomers (effect of roads on dike erosion due to overtopping), UTwente     (winner KNW thesis price 2016)
  • 2014   T. Groot (effect of buried sewers on dike stability in MFDs), UTwente
  • 2014   E. Ten Hagen (application of Flexible Mesh for water level prediction), HKV
  • 2014   R. Kramer (time-dependent prediction of dike failure due to piping), Grondmij
  • 2014   J. Seuren (modelling bed forms with cellular automata), Wallingford, UK
  • 2013   T. Visser (optimizing the design of bed protection behind sluices), Grondmij
  • 2013   M. Jellesma (modelling the roughness of compound bed forms), HKV
  • 2013   R. Joustra (interface stability in granular open filters around piers), Deltares
  • 2012   K. Heerema (hydrological modelling of climate effects in Mongolia), DHV
  • 2010   L. Goedhart (presentation of flood uncertainty to decision makers), Hydrologic

Supervising BSc projects:

  • 2017   L. van Weeghel (
  • 2017   J. Twijnstra (quick tool for grass cover strength of IJssel dikes), Vallei-Veluwe.
  • 2016   R. Joosten (flood risk in transboundary levee systems), RHDHV
  • 2016   T. de Bruin (quick scan of submerged breakwaters), TenCate Geosynthetics
  • 2016   L. Albers (monitoring eilandkribben in de IJssel bij Deventer), RWS-ON
  • 2015   N. Daling (invloed van meetkwantiteit op dijktoetsing), BZIM (nominee SRC price 2016)
  • 2015   H. Aan het Rot (golfsimulatoren in het buitenland), Infram
  • 2015   P. Drenth (uncertainty of soil parameters on dike stability), BZIM
  • 2014   R. Herrebrugh (optimizing dike safety analysis), BZIM
  • 2014   T. Brouwer (remote sensing applications for prediction of precipitation), WSGS
  • 2014   Y. Keizer (testing the applicability of the imWEB model), Univ. Guelph, Canada
  • 2012   I. Kamphuis (benthem waterplein, een case studie van HydroCity), Hydrologic

Affiliated Study Programmes



Courses Academic Year  2021/2022

Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.

Courses Academic Year  2020/2021


  • 2016-now Daily supervisor of 2 PhD students in the AllRisk research program. Project is part of STW Perspectief 2016 program of prof.dr. M.Kok (TU Delft).
  • 2015-2019 Daily supervisor of K.D. Berends. Project is part of STW Perspectief 2014 program RiverCare, towards self-sustaining multifunctional rivers of prof.dr. S.J.M.H. Hulscher (Utwente).
  • 2012-2016 Daily supervisor of J.P. Aguilar-Lopez. Project is part of STW-Perspectief 2010 project on Integral and sustainable design of multifunctional flood defences of prof.drs.ir. J.K. Vrijling and prof.dr.ir. M. Kok (TU Delft).
  • 2011-2014 Postdoctoral researcher in STW-VIDI project of dr.ir. C.M. Dohmen-Janssen on river bed form evolution modelling for flood management (BedFormFlood).
  • 2011-2014 Postdoctoral researcher in STW-VIDI project of dr.ir. C.M. Dohmen-Janssen on river bed form evolution modelling for flood management (BedFormFlood).
  • 2007-2011 PhD project Uncertain hydraulic roughness in river models (part of STW-VICI project “Rough Water” of prof.dr. S.J.M.H. Hulscher) in close cooperation with Deltares. Further activities: contact person for PhD network of NCR (Netherlands Centre for River Studies), collaboration with Geological Survey of Denmark (GEUS, see publication).
  • 2007 Data assimilation (Ensemble Kalman Filtering) in Delft-FEWS for improved river flood forecasting. Internship at Deltares (formarly: WL|Delft Hydraulics).

Supervision of PhD Students

  • 2020-now
  • 2016-now t.b.a. (UT, daily supervision), vacant. Intended starting date: 2017
  • 2016-now t.b.a. (UT, daily supervision), vacant. Intended starting date: 2017
  • 2015-2019 Koen Berends (UT, daily supervision). Improving river management by estimating model uncertainty. Starting date: March 2015.
  • 2012-2016 Juan-Pablo Aguilar-Lopez (UT, daily supervision. Thesis title: Probabilistic safety assessment of multifunctional flood defences, defended Dec 9, 2016.


  • Organizer of the NCR-days 2014 conference, October 2-3 2014, Enschede.
  • Organizer of the 2014 NCR theme day. Workshop on Uncertainty in river management, how to deal with it? March 27 2014, Jaarbeurs Utrecht.
  • Reviewer for e.g. the following journals: Water Resources Research (WRR), Journal of Hydraulic Research (JHR), Earth Surface Processes and Landforms (ESPL), Environmental Modelling and Software (EMS), Hydrology and Earth System Sciences (HESS), Computers & Geosciences (CAGEO), International Journal of River Basin Management (IJRBM), Stochastic Environmental Research and Risk Assessment (SERRA)

Contact Details

Visiting Address

University of Twente
Faculty of Engineering Technology
Horst Complex (building no. 20), room W212
De Horst 2
7522LW  Enschede
The Netherlands

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Mailing Address

University of Twente
Faculty of Engineering Technology
Horst Complex  W212
P.O. Box 217
7500 AE Enschede
The Netherlands

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