t. peters - nhazca open day
TRANSCRIPT
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NHAZCA OPEN DAY
Developments on levee safety and the IJkdijk project
ROMA31 – 01 – 2013
T. PetersDeltares
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Don’t worry, it’s only the latest disaster movie
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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
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Living in deltas, coastal areas and river basins
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Living in deltas, coastal areas and river basins
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Living in deltas, coastal areas and river basins
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• Strategic advisor and second opinions• Support for risk-driven approach
North-South Underground line Hydraulic & geotechnical engineering
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• 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
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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
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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
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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
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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)
1953
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IJkdijk research - smart levees
FEWS-DAM floodrisk management
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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
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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.
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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?
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All in One - Sensor Validation Test – before
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All in One - Sensor Validatie Test - after
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DAM: Toolbox for automated levee assessments
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Stochastic model of the subsoil
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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 )
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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.
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And will this be the future of flood protection?
Thank you for your attention