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GIS Hazard Mapping and Disaster Preparedness in Barbados. Coastal Planning for Disaster Management Seminar June 30 th ,2006. Ramon Roach Water Quality Analyst Marine Department CZMU Barbados. Overview. Hazard Mapping Traditional Hazard Mapping GIS Hazard Mapping Is it Necessary?

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GIS Hazard Mapping and Disaster Preparedness in Barbados

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GIS Hazard Mapping and Disaster Preparedness in Barbados

Coastal Planning for Disaster Management Seminar

June 30th,2006

Ramon Roach

Water Quality Analyst

Marine Department

CZMU Barbados


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Overview

  • Hazard Mapping

  • Traditional Hazard Mapping

  • GIS Hazard Mapping

  • Is it Necessary?

  • HM in Barbados

  • Flood Hazard Mapping

  • Analytical Results

  • Applications for HM in Barbados

  • Disaster Management

  • Long-Term Planning

    Way Forward

UVI, 2006

Coastal Planning for Disaster Management Seminar – June 30, 2006


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Hazard Mapping

  • Definition:

    • Process of establishing geographically where and to what extent particular phenomena are likely to pose a threat to people, property, infrastructure and economic activities.

    • Traditionally using paper maps.

  • Modeling Hazard Scenarios

    • Evaluate effects

    • Frequency of occurrence

    • Duration of event

    • Intensity of event

Coastal Planning for Disaster Management Seminar – June 30, 2006


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GIS Hazard Mapping

  • Digital Implementation of Hazard Mapping

    • Geographic Information Systems (GIS)

    • Software Packages

      • ESRI ArcView

      • Mapmaker

  • Advantages Over Paper Maps

    • Easier to update

    • Automated spatial analysis

    • Straightforward data management

    • Easier to distribute

    • Interoperable with other data types

    • Effective multi-hazard mapping

Coastal Planning for Disaster Management Seminar – June 30, 2006


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LACLLA (2005)

Hazard Mapping

  • Why produce hazard maps?

    • Current and projected environmental hazards make them essential

      • Hurricanes

      • Tsunamis

      • Climate Change

      • Sea Level Rise

    • Improves decision making

    • Improves planning effectiveness


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Flood Hazard Mapping in Barbados

  • DELCAN Atlantic Coast Study

  • 1:100yr storm model

    • Wave runup

    • Contour map elevations

  • Disruption of services and commerce

    • Banking

    • Utilities

Coastal Planning for Disaster Management Seminar – June 30, 2006


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Flood Hazard Mapping in Barbados

  • Flood Model Results

    • 6,000 residences along the west and south coasts

    • 70% of west coast hotels

    • Emergency Shelters

      • St. Lawrence Church

      • St. Christopher’s School

      • Payne’s Bay Methodist Church

    • Police Stations

      • Worthing Police Station

      • Central Police Station

      • Holetown Police Station

7

Coastal Planning for Disaster Management Seminar – June 30, 2006


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Applications for Hazard Mapping in Barbados

  • Disaster Management Planning

    • Emergency Services

      • Evacuation Routes

      • Nearest “safe” shelter

        depending on type or scale of

        environmental hazard

      • Number of persons displaced

        and excess housing required

      • Basic services required following

        a disaster

        • Sanitation

        • Drinking water

        • Food

serc.carleton.edu

Coastal Planning for Disaster Management Seminar – June 30, 2006


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Applications for Hazard Mapping in Barbados

  • Long-term Development Planning

    • Building Setbacks

      • CZMU beach and cliff setbacks

      • Minimum building elevations

        (TCPDO)

    • Relocation or retrofitting

      of essential services

      • Utilities

      • Emergency Shelters

      • Police Stations

Coastal Planning for Disaster Management Seminar – June 30, 2006


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Applications for Hazard Mapping in Barbados

  • Insurance Rate Calculation

    • Digital Flood Insurance Rate Maps (DFIRMS)

      • Insurance rate based on

        flood vulnerability

      • Rates adjusted depending

        on base flood elevation

        (BFE) and freeboard

      • Promotes improved

        building practices

www.ci.central-point.or.us

Coastal Planning for Disaster Management Seminar – June 30, 2006


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The Way Forward

  • Detailed Multi-Hazard Mapping Study for the coast

    • Various hazard scenarios including

      tsunamis and sea level rise

    • Tiered response systems and

      mitigation strategies based on

      hazard severity

  • Holistic approach to

    hazard management

    • Improved inter-agency cooperation

    • Long-term mitigation strategies

      incorporated into development

      planning

Coastal Planning for Disaster Management Seminar – June 30, 2006


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