Coastal Hazards Climate Change Experiences from Sri Lanka Mangala Wicramanayke

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Director General Coast Conservation & coastal Resources Management Department Defence & Urban development Ministry Sri Lanka

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  • Coastal Hazards &Climate Change Experiences from Sri Lanka

    Eng. Mangala Wickramanayake

    Director GeneralCoast Conservation & coastal Resources Management DepartmentDefence & Urban development Ministry Sri Lanka

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  • Contents of the Presentation

    Coastal erosion

    Immediate responses

    Long term protection and restoration

    Tsunami experiences 2004

    Recovery & restoration

    4

  • Coastal Zone

  • 6

  • Causes of Erosion

    Sand deficit

    Coast protection

    Natural processes

    Seasonal fluctuations

    Human interventions

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    Immediate

    responses

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    Responses

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  • Definition of protection types

    Emergency protection

    Coast protection

    Long term shoreline management

    Soft Solutions

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  • Management objectives for shoreline management

    Ensure that coast protection schemes do not contribute to, or aggravate coastal erosion.

    Identify coastal erosion trends, prioritise areas which needs protection and formulate appropriate Shoreline Management Plans recommending solutions that are cost effective as well as socially and environmentally acceptable.

    Minimise the negative impacts of coastal erosion and sea level rise in highly developed and protected areas by reclaiming suitable coastal frontages to ensure new development possibilities and to enhance economic potential of coastal frontages.

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    Present

    layoutAlternative layout

    Wave generated current

    pattern

    Sediment transport

    pattern

  • Coastal Research & Designs

    Coastal Planning Preparations of coastal Designs Coastal monitoring Coastal Research Coastal studies

  • Offshore Monitoring

  • Near-shore MonitoringAr ug ambay Hik k aduwa Mt Lav in i a

    Ni lawe l i Po lhe n a Unawa t una

  • Bathymetry Shape of coastline Tide levels Ground level & slope Topographic features Shore roughness Shore-connected water bodies Sand dunes Coastal vegetation information Coastal land use

    Monitoring

  • Shoreline changes

    Stability of shore structures

    Functional behavior of structures

    Effects of coastal developments

    Coastal features

    Coastal destruction practices

    Unique coastal landscapes

    Coastal fauna & flora

    Coastal sites with archeological significance

    Monitoring Post War

  • Shoreline Changes

  • Sand Dunes

  • Coastal Destruction

  • Coastal Landscapes

  • Sea Grass

  • Coastal Developments

  • Coastal Species

  • Coastal Archaeological Sites

  • Shoreline management

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    Provides:

    Protection Restoration of sandy beachesAllows:

    Recreation Beach seine fishing Sheltered boat landing

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    Before

    After

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  • Tsunami 2004

    Not aware

    Not prepared

    No management mechanism in place

    No immediate responses

    Slow recovery

    Many authorities/funds/other resources

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  • Recovery Process

    Main highway one week

    Other infrastructure one month

    Rail link four months

    Fishery industry one year

    Settlements 18 months

    Warning system 3 years

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  • Solutions

    Warning system in place

    Management mechanism established

    New Ministry for disaster preparedness

    Awareness programs

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  • Mitigation of Climate Change Impacts through Ecosystem Conservation and Management

    Coral Reefs Lagoon areas

  • Healthy Coastal Ecosystems ;

    Provide resources for livelihoods for local coastal communities

    Provide buffers against coastal hazards like storms, tsunami etc..

  • Soft Solutions

    The Department uses following methods for conservation and management of coastal ecosystems

    Restoration and Rehabilitation

    Protection

    Enhancement

  • Restoration and Rehabilitation

  • Protection

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    Enhancement

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    Thank You