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Levees in a Changing Environment

Flood risk management: Netherlands, Europe, Worldwide

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Levees in a Changing Environment

  1. 1. 15th of May 2014 Flood Risk Management Netherlands, Europe, Worldwide: Levees in a changing environment Ellen Tromp MSc. CE PA
  2. 2. 15th of May 2014 Content • Flood Risk Management • Netherlands • Europe • Worldwide • Levees strength assessment • Levees in a changing environment • Conclusions Seminar on Levee Management, Brisbane,
  3. 3. Australia - Netherlands Brisbane 15th of May 2014Seminar on Levee Management, Brisbane,
  4. 4. photo: Rijkswaterstaat River Waal Primary dike/levee Fore land Summer dike River/ Navigation channel 15th of May 2014Seminar on Levee Management, Brisbane,
  5. 5. Surface level 15th of May 2014Seminar on Levee Management, Brisbane, Flood prone areas
  6. 6. Flood defences in the Netherlands Dunes Dams and barriers Levees 15th of May 2014Seminar on Levee Management, Brisbane,
  7. 7. Over 15.000 km of levees in The Netherlands 1900 km ‘Primary’ • 1450 km River Dikes • 400 km Sea Dikes 14.500 km ‘Secondary’ Sea River Secondary levee 15th of May 2014Seminar on Levee Management, Brisbane,
  8. 8. FRM in the Netherlands Major shift after flood 1953  Prevention cornerstone of flood safety  Delta works 15th of May 2014 Flooded road Limburg 1993 1953, high river discharges, 1995 source: ANP –Herman Pieterse Seminar on Levee Management, Brisbane,
  9. 9. FRM in the Netherlands Shift in thinking Room for the River Building with nature …. • Flood protection programme (part of Deltaprogramme) • 360 mln Euro each year for dike strengthening • Opportunities with other disciplines 15th of May 2014 Flooded road Limburg 1993 Venlo, high river discharges, 1995 source: ANP -Ed Oudenaarden Itteren, high river discharges, 1995 source: ANP –Herman Pieterse Seminar on Levee Management, Brisbane,
  10. 10. 15th of May 2014Seminar on Levee Management, Brisbane, Disaster Risk Reduction (DRR) • Dutch National Water Plan (2009) • ‘New’ approach: DRR 1. Prevention as policy cornerstone 2. Sustainable Delta Planning 3. Systematizing and sustaining disaster mitigation 2nd layer  focus on mitigation and adaptation 1 2 3 Sumido river, Tokyo, Japan Germany
  11. 11. 17 march 2011 11 Evacuation 210.000 people in 1995 Decision of evacuation was based on expert opinions Height was not a problem but strength (stability) of levees. Need for forecasting strength in decision process Importance of strength of levees 15th of May 2014Seminar on Levee Management, Brisbane,
  12. 12. Balancing safety level and consequences Safety Ecology Economy Social- cultural RISK PROBABILITY EFFECT STRENGTH LOAD DAMAGE VICTIMS LOADING STRENGTH 15th of May 2014Seminar on Levee Management, Brisbane,
  13. 13. 13 Brisbane 2011, in The Netherlands a new wake up call for a new focus on preparedness. Focus on Contingency plans, monitoring and training 15th of May 2014Seminar on Levee Management, Brisbane,
  14. 14. 14 levee army Professionals • approx. 1500 Volunteers • approx. 5000 Training: levee army
  15. 15. FRM in the world  Prevention  Sustainable planning  Emergency response 15th of May 2014Seminar on Levee Management, Brisbane,
  16. 16. 15th of May 2014 Grimma, Germany, june 2013 Prague, Czech Republic , June 2013 Elbe, Germany,, June 2013 Courtesy: ReutersUK, December 2013 Seminar on Levee Management, Brisbane,
  17. 17. 17 Levees strength assessment “Smart levees” send strength status through smart networks to flood control rooms In normal conditions  levee management In extreme conditions  crisis management 15th of May 2014Seminar on Levee Management, Brisbane,
  18. 18. Relevant failure modes for flood defences Levees and dunes Structures bekleding Overtopping revetments Overtopping Stability Stability failure piping Closing failure structure collaps Collision seepage/heaveerosion 15th of May 2014Seminar on Levee Management, Brisbane,
  19. 19. 19 IJkdijk: development of monitoring systems Stability (2008) Wave overtopping (2007) Piping test (2009) 15th of May 2014Seminar on Levee Management, Brisbane,
  20. 20. 20 DINO REGIS Flimap (IRIS) Basic infomation Mathematical models Real-time data Visualisation tools Schematisation tools and mechanisms Quality assurance Dike Analysis Module (DAM) 15th of May 2014Seminar on Levee Management, Brisbane,
  21. 21. 15th of May 2014Seminar on Levee Management, Brisbane,
  22. 22. 15th of May 2014Seminar on Levee Management, Brisbane, Integration in land use planning, flood safety and robustness for climate change Characteristics based on dike safety 1. Technical design 2. Manageability of the dike 3. Planning horizon Characteristics based on spatial planning 4. Space occupation 5. Dike acts as a barrier between two parts of urban development 6. Functionality (Van Veelen, et al. 2010)
  23. 23. Two identified strategies Two strategies identified: 1. Synchronisation (combining several agenda’s) 2. Anticipation (make the most of the oppportunities) 15th of May 2014 Rural areaUrban area ‘Standard’ Multifunctional dike Above: utilization of underground space Below: adaptive integral levee Seminar on Levee Management, Brisbane,
  24. 24. Anticipation - 2 15th of May 2014Seminar on Levee Management, Brisbane,
  25. 25. Urban areas 15th of May 2014Seminar on Levee Management, Brisbane,
  26. 26. Rural areas 15th of May 2014 Jacking up houses Sand engine Seminar on Levee Management, Brisbane,
  27. 27. Conclusions There is no perfect flood risk management plan. Consider and combine three approaches (prevention, risk reduction and response management) Not only focus on the hydraulical conditions but also take the strength of levees into account. Levees are part of the built environment, which is constantly changing, in maintenance schemes this should be incorporated. 15th of May 2014Seminar on Levee Management, Brisbane,
  28. 28. Questions Contact details: Mrs. Ellen Tromp E. Ellen.Tromp@deltares.nl T: +31(0) 6 10188347 www.deltares.nl @ellentromp 15th of May 2014Seminar on Levee Management, Brisbane,
  29. 29. 15th of May 2014Seminar on Levee Management, Brisbane, Spatial integrated levee concepts 4 strategies 1. levee as area transformer 2. Levee as urban public domain 3. Levee as basis for area development 4. Levee as integrated structure

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Flood risk management: Netherlands, Europe, Worldwide

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