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)

1953

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