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  • Sustainable Flood Risk ManagementBabak BozorgyHIPS Lunchtime Seminar, 23 Mar. 2008

  • Buzz words

    Sustainability

    Integrated Water Resources Management (IWRM)

  • SustainabilityDo what is needed now, but without compromising the needs of future generationssustainability = trade-offnow versus futureeconomy versus environment

  • IWRMIntegration of:surface water and groundwaterquantity and qualityecological aspectsother fields: environmental planning, spatial planning, etc

    from sectoral approach to holistic approachprocess orientation + economics + institutions

  • Dublin principles - 1992Fresh water is a finite and vulnerable resource, essential to sustain life, development and environmentWater development and management should be based on a participatory approach, involving users, planners and policy makers at all levelsWomen play a central part in the provision, management and safeguarding of waterWater has an economic value in all its competing uses and should be recognized as an economic good

  • Definition of IWRMGlobal Water Partnership (GWP), 2000:IWRM is a process which promotes the co-ordinated development and management of water, land and related resources, in order to maximise the resultant economic and social welfare in an equitable manner without compromising the sustainability of vital ecosystemsSee: Tec 4 of GWP

  • natural system

  • impactsdemandsnatural systemsocio-economicsystem

  • infrastructureimpactsdemandslaws,regulations,managementnatural systeminstitutionalsystemsocio-economicsystem

  • infrastructureimpactsdemandslaws,regulations,managementnatural systeminstitutionalsystemsocio-economicsystemintegratedwater resourcesmanagement

  • Content

  • IWRMIWRM is a learning process (steps, interaction)IWRM = balancing of interests (functions)To be applied at river basin levelImplementation is culture and situation dependent

    Learn from others, dont copy !

  • The challenge of IWRMTo strike a balance between the use of the resources as a basis for livelihood and the protection and conservation of the resource to sustain its functions and characteristics

  • FloodFloods are the most common and destructive events among natural disasters

    Flood events and their damages have been increased in the recent decades

  • Flood ManagementSo, traditional approaches of flood management have not been able to control the damages of floods and adoption of new approaches is essential. The need for new approaches of Sustainable Development, Risk Management and Resilience is emphasised in:

  • Flood ManagementEarth Summit, UN Div. for S.D., Agenda 21, Rio, 1992 Intl. Strategy for Disaster Reduction, UN, 2000 World Summit on S.D. (WSSD), Johannesburg, 2003Intl. Decade for Action, Water for Life 2005-2015, UN G.A.

  • Traditional and new approaches to flood management Risk = event probability * consequencesFlood Management

  • Traditional and new approaches to flood management Risk = event probability * consequences

    Traditional strategies = Resistant strategies= Flood control to reduce event probability with resistant measures such as dikes

    increased dikes height = increased confidence = increased economic development = increased risk

    Flood Management

  • Risk = event probability * consequences

    New strategies = Risk management strategies = Resilient strategiesIntroduced as one of the principles of Sustainable Development

    Flood Management

  • Resilience = Ability of a system to withstand disturbances by recovery

    Resistance = Ability of a system to withstand disturbances without any reactionFlood Management

  • Resilience in natural disasters is one of the elements of Sustainable DevelopmentFlood Management

  • IFM is a process that promotes an integrated, rather than fragmented, approach to flood management. It integrates land and water resources development in a river basin, within the context of IWRM, and aims to maximize the net benefit from floodplains and to minimize loss to life from flooding

    Ref.: Associated Programme on Flood Management (APFM), GWP Integrated Flood Management (IFM)

  • More Room for Rivers or Learning to Live With FloodsLanduse PlanningGreen Rivers (Bypass Channels)Compartments (Detention Ponds)Flood Forecasting and Flood WarningEvacuation PlansFlood Insurance Resilient Strategies in Flood Management

  • Quantifying resilience by indicatorsAmplitude Expected Annual Damages (EAD)

    Expected Annual Number of Casualties (EANC) Resilient Strategies in Flood Management

  • Graduality

    Resilient Strategies in Flood ManagementGResis.=0 GResil.=0.91 GComb.=0.7

  • Recovery Rate/CapacityResilient Strategies in Flood Management

  • Ranking the different flood risk management strategies and choosing the best/most resilient strategy is a Multi-Criteria Decision Making (MCDM) problem which can be addressed by Multi-Criteria Evaluation (MCE) techniques. This is also called Decision Support System (DSS)Multi-Criteria Decision Making

  • Gorgan River Basin, North-West Iran Case Study

  • Case Study

  • Flood Management Strategies:Strategy #1: Natural ConditionsStrategy #2: Golestan DamStrategy #3: Dikes along the reachesStrategy #4: Green RiversStrategy #5: Flood Warning SystemStrategy #6: Flood InsuranceStrategy #6: Flood Warning System & Flood InsuranceCase Study

  • Flood Inundation Modelling (Flood Mapping)For all the strategies with 2, 5, 10, 25, 50, 100, 200, 500, 1000, 2000, 5000 and 1000 years return periods with MIKE FLOOD (Dynamic couple of MIKE 11 and MIKE 21) Case Study

  • Flood mapping in Strategy #1, 1000 years flood Case Study

  • Flood Damage (EAD) Estimation and MappingCase StudyFlood damage mapping in Strategy #1, 1000 years flood

  • Casualties (EANC) Estimation and MappingCase StudyCasualties mapping in Strategy #1, 1000 years flood

  • Casualties (EANC) Estimation and MappingCase StudyCasualties mapping in Strategy #1, 1000 years flood

  • Ranking of the strategies by MCDMCase StudyEvaluation Matrix Decision Matrix

  • Case Study2nd part

  • Thank you for your attentionNo loss by flood and lightening, no destruction of cities and temples by the hostile forces of nature, has deprived man of so many noble lives and impulses as those which his intolerance has destroyed Helen Keller

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies15th largest city in the world in terms of population (Ref.: Wikipedia) (8-12 mill.)700 km2>800m difference in altitude in urban area>2500m difference in altitude in the catchment areaVery steep slope in North-South directionVery mild slope in East-West direction

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Niayesh Highway Sepah Complex (7th March 2005)JWRC April 2005

  • Farahzad St. (7th March 2005)JWRC April 2005

  • Farahzad St. (7th March 2005)JWRC April 2005

  • Sazman-e-Ab St. (7th March 2005)JWRC April 2005

  • Farahzad Water Way (7th March 2005)JWRC April 2005

  • Azari T- Junction (7th March 2005)JWRC April 2005

  • Tappeh Neyzar Channel (7th March 2005)JWRC April 2005

  • Tappeh Neyzar Channel (7th March 2005)JWRC April 2005

  • West Flood Diversion Channel (7th March 2005)Farahzad River Diversion ChannelJWRC April 2005

  • Niayesh Highway (7th March 2005)JWRC April 2005

  • Niayesh Highway (7th March 2005)JWRC April 2005

  • Niayesh Highway (7th March 2005)JWRC April 2005

  • Yadegar Highway (7th March 2005)JWRC April 2005

  • Yadegar Highway (7th March 2005)JWRC April 2005

  • JWRC April 2005Resalat Highway

  • Velenjak River Velenjak River Moqaddas Ardebili CrossVelenjak River Sediment Detention Basin Velenjak River Downstream of Sediment Detention Basin JWRC April 2005

  • Velenjak River Between Moqaddas Ardebili and Chamran HighwayVelenjak River Nil St.Velenjak River MIrdamad CrossVelenjak River Entrance to the Diversion TunnelJWRC April 2005

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation StudiesDrainage System (North and East)Drainage System

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Tehran Flood Mitigation Studies

  • Thank you for your attentionNo loss by flood and lightening, no destruction of cities and temples by the hostile forces of nature, has deprived man of so many noble lives and impulses as those which his intolerance has destroyed Helen Keller