Reducing life threatening conditions during extreme flood events: Benefits from implementing spillways to dykes

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1) The document discusses implementing spillways to existing dykes to reduce flood risk from extreme events. 2) Modeling was conducted to analyze the hydrodynamic consequences and overall flood risk of different alternatives, including the existing scheme and adding a spillway. 3) Results showed that a spillway could reduce the number of people exposed to floods above the dyke's design level, but benefits decreased for larger floods over 1000 years. Combining a spillway with restricted development provided the most effective flood risk management.

Technologie

Reducing life threatening conditions during extreme flood events: Benefits from implementing spillways to dykes Neuhold, C. & Nachtnebel, H.P. University of Natural Resources and Applied Life Sciences Department of Water, Atmosphere and Environment Institute of Water Management, Hydrology and Hydraulic Engineering

Content ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events source: Munich RE

Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Methodological approach 31 05 2010 Reducing life threatening conditions during extreme flood events ,[object Object],[object Object],[object Object],[object Object],[object Object]

Methodological approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Results 31 05 2010 Reducing life threatening conditions during extreme flood events ,[object Object],[object Object],[object Object],[object Object],[object Object],Scenario alternative 1 alternative 2 alternative 3 dyke breach no protection HQ 30 170 HQ 100 1 1 196 HQ 300 80 (254) 41 (53) 71 276 437 (1072) HQ 1000 218 (635) 235 (647) 187 277 HQ 5000 330 (645) 291 331 (840)

Results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Conclusions ,[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],31 05 2010 Reducing life threatening conditions during extreme flood events

25 11 2009 A qualititative approach to assess flood risk associated with landfills Thank you for your attention! [email_address] +43 1 47654 5507 University of Natural Resources and Applied Life Sciences Department of Water, Atmosphere and Environment Institute of Water Management, Hydrology and Hydraulic Engineering

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