NHAZCA OPEN DAY
Developments on levee safety and the IJkdijk project
ROMA31 – 01 – 2013
T. PetersDeltares
Don’t worry, it’s only the latest disaster movie
Content
• Introduction Deltares
• Introduction flood protection NL
• IJkdijk research + smart levee concept, combiningmeasurement technology and dike technology
• DAM software: Dike Analyses ModuleHow to use the data for optimisation and forecasting?
• Conclusion
Living in deltas, coastal areas and river basins
Living in deltas, coastal areas and river basins
Living in deltas, coastal areas and river basins
• Strategic advisor and second opinions• Support for risk-driven approach
North-South Underground line Hydraulic & geotechnical engineering
• Marina Bay: from estuary to freshwater reservoir • Objective: an operational water quality management system• Collaboration with the Singapore Public Utilities Board
Singapore Marina BayHydrological sciences / Environmental sciences & eco-engineering
Mekong Delta Plan Vietnam
• Flood precautions, river basin management, water quality and salt intrusion
• Context: Global Water Programme • Dutch government partnered with Dutch Engineering Firms
Hydrological sciences / Environmental sciences & eco-engineering
Palm Island, Dubai Hydraulic engineering / Geo-engineering / Eco-engineering
• Man-made peninsula measuring 4 x 4 km • Advice about coastal defence and erosion, water circulation, water
quality, site preparation, compression and earthquake precautions
Flood forecasting for USA
Support for National Weather Service and Forecasting Centres during implementation of their own system based on Delft-FEWS
Hydrological sciences / System informatics
Flood protection NL
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Elevation of the Netherlands
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Sea defencesSea DikeLarge heightsLong outer slopeExtreme loading condition
during storm at sea (several hours)
Wave attack
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River dikes/leveesLong stretchesWith / without fore landExtreme loading condition during high
river level (several days, time dependent flow)
Development of pore pressure in and underneath dike
Houses on and behind the dike
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Canal dikes
Small dimensionsWater level almost constantDifference between daily and extreme
conditions (relatively) small (stationary flow)
Loading conditions during extreme rainfall or drought (peat) and external actions
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Failure modes of levees
Overflow Overtopping
Slope stability outwardsSlope stability inwards
Seepage face erosion
Liquefaction Revetment failure
Height is important, but….
Other failure modes matter also.
Piping/Heave (internal erosion)
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IJkdijk research - smart levees
FEWS-DAM floodrisk management
IJkdijk
Smart levee concept
.Combining dike & sensor technology for floodrisk management and real-time prognoses of dike stability.Use information also to optimize levee maintenance and leveeimprovement programmes
IJkdijk
The IJkdijk project: full scale field research
Double goal of the IJkdijk experiments:. Testing of new sensor and remote sensing technologies forSmart Levee concept. Increase knowledge on failure mechanisms
History of tests:. 2007 project start-up, opening by Minister (wave overtopping test). 2008 Stability Test (6m high, 100m long levee). 2009 Piping Tests (seepage erosion, 2x2 full-scale tests). 2012 All-in-one tests (seepage erosion, micro/macro stability, piping prevention measures). 2012 Innovative piping (seepage) preventing techniques.
All in One - Sensor Validation Test
15 commercial companies and 4 research organisationsfrom all around the world cooperating in this field testGoal: can measurements predict dike failure?
All in One - Sensor Validation Test – before
All in One - Sensor Validatie Test - after
DAM: Toolbox for automated levee assessments
Stochastic model of the subsoil
Result: automatedlevee assessment
• Regular assessment by law in accordance with prescribed schematization by codes and standards
• Platform allows fully automated assessment of a levee system
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FEWS-DAM: real time forecasting of levee strength
Color Range to display probability of failure
Color of dots depends on calculated probability of failure.
When clicking on a dot, a new window will pop up. This window displays the water height and probability of failure for the failure mechanism piping (see )
Conclusion
• Climate change the Netherlands are facing major new challenges on flood protection
• First key: New measurement technology in the dike (fibre optics, micronano sensors) and remote sensing (LIDAR, SAR, ….) providing real-time observations.
• Second key: data-model integration. DAM already improves the cost effectiveness of the levee life cycle management for:
• Maintenance and planning• Assessment (5-yearly checkup)• Reinforcement and design
• Third key: DAM connected to Flood Early Warning Systems (FEWS) provides real-time prediction of failure as a decision support tool for floodrisk management.
And will this be the future of flood protection?
Thank you for your attention