Wednesday, May 17th, 2017

Wednesday Seminar

4:10 PM, 55 Roessler
Tea and cookies at 3:45 in the aviary - (2110 EPS)

“National and Regional Levee systems analysis in the UK and relevance to USA”

      – by Jonathan Simm, HR Wallingford

This presentation will explain the levee system analysis methodology adopted in the UK to provide a comprehensive picture of current flood risk and its potential relevance to the USA. The approach is based on models and data that have been largely funded by the Environment Agency of England.

The risk analysis method comprises extreme value distributions to describe the hydraulic loading on the flood defense infrastructure, fragility curves to describe the likelihood of structural failure of the defenses, a computationally efficient flood inundation model and functions that relate depth of flooding to economic damages. Recent innovations in the methodology have significantly enhanced the approach to coastal flood risk analysis. The results are used by the Environment Agency for a wide range of purposes, including, production of internet flood maps to meet the requirements of legislation relating to the European Floods Directive, justification of government expenditure on risk management investments and developing risk-based prioritized asset management plans. Whilst the method has been applied using UK data sets, the generic methodology is widely applicable.

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