1/26/13

Challenge the future Delft University of Technology

Multilayered Safety Next step in Dutch flood risk management?

Frauke Hoss MSc, Delft University of Technology

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Content

•  Netherlands •  Multilayered Safety •  Results

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The Netherlands Area under sea level

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Local measures

Prevention

Alternative types of

Prevention

Evolution

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Alternative to Prevention (Multilayered Safety)

3.  Crisis Management

2. Spatial Solutions

1. Prevention

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Prevention Multilayered Safety Layer 1

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Spatial Solutions Multilayered Safety Layer 2

Source: Environment Canada (http://www.ec.gc.ca)

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Crisis Management Multilayered Safety Layer 3

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Multilayered Safety

• Permanent measures • Probability-reducing •  Large scale

Prevention

• Permanent measures •  Loss-reducing (material

values) • Small scale

Spatial Solutions

• Temporary, organizational measures

•  Loss-reducing (fatalities)

Crisis Management

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Dordrecht Numerical research

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Dordrecht Individual Risk

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• Multilayered Safety is a useful concept to organize integrated flood risk management

• Prevention: efficient on large scale, much responsibility for government, major change of environment, maintenance often neglected

• Spatial Solutions: cost-efficient to address local differences in risk, implementation/maintenance difficult to oversee, large role public

• Crisis Management: MUST, large uncertainty, shared responsibility g‘ment/public, organize on smallest scale possible

Sum-up Remember context!

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Questions?