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WMO; Climate and Water Department

WMO. Flood processes, management issues and perception of floods. Joachim Saalmüller Climate and Water Department, WMO. Training Workshop Integrated Flood Management, Tehran, Iran 10-14 May 2009. WMO; Climate and Water Department. www.wmo.int. Introduction. What is a flood?.

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WMO; Climate and Water Department

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  1. WMO Flood processes, management issues and perception of floods Joachim Saalmüller Climate and Water Department, WMO Training Workshop Integrated Flood Management, Tehran, Iran 10-14 May 2009 WMO; Climate and Water Department www.wmo.int

  2. Introduction

  3. What is a flood?

  4. Riverine flood (rural) U.K U.S

  5. During flooding Sediment / nutrition Recharge of groundwater Flushing sediment / /erosion After flooding Producing diversified environment/habitat

  6. Riverine flood (urban) Switzerland Indonesia

  7. Pluvial flooding Singapore China

  8. Flash flood/Debris Flow Switzerland Japan U.S

  9. Coastal flood Italy U.K

  10. Failure of hydraulic infrastructure Japan Japan

  11. Mudflow Indonesia Japan

  12. Landslide China U.S

  13. Example Videos • Please observe: • What is emphasized? • How does the commentator influence the perception of the audience?

  14. What is the biggest individual risks? • Economic crises • Political crises • Unemployment • Natural disaster • Poverty • Traffic Accident • Disease • Criminality • …

  15. What is risk? Media perspective • Risk is something that can be easily associated with fear or sensation, i.e. sells well

  16. What is risk? Science perspective… • Probability x Consequence • Hazard x Exposure x Vulnerability • Example floods: • Hazard: probability of a particular discharge or water level at a particular place • Exposure: Land and assets in the inundation area of that flood • Vulnerability: ability/disability of the people or assets to withstand, cope with or recover from the negative effects of that flood

  17. What is risk? Some public views… • « Government has to make sure that my neighbourhood is save from flooding » • « Those people who live in floodprone areas should pay by themseolves for any floodlosses » • « We have lived here for generations and it is our land, so how can we abandon this place? »

  18. Risk perception • “intuitive risk judgements of individuals and social groups in the context of limited and uncertain information” (Slovic 1987) • way in which a stakeholder views a risk, based on a set of values or concerns. Risk perception depends on the stakeholder's needs, issues and knowledge. Risk perception can differ from objective data.

  19. Think about it • How can we establish « acceptable levels » of flood risk? • Does the « benefit perspective » also belong into the debate? • Is there a chance that the public is interested in a balanced picture? Risk perception as a major driver of the public debate on flood management: culturally/wealth specific.  Media as a major conduit for risk perceptions

  20. Thank you!

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