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Coastal Vulnerability Model: Mapping the Coastal Protection Benefits Provided by the Natural Environment. Greg Guannel , K. Arkema , M. Papenfus , G. Verutes , J . Bernhardt, A. Guerry , C.-K. Kim, M. Ruckelshaus, and J. Toft. fabiencousteau.org. Wave, Wind. Geomorphology, Relief.

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Coastal Vulnerability Model:

Mapping the Coastal Protection Benefits

Provided by the Natural Environment

Greg Guannel, K. Arkema, M. Papenfus, G. Verutes,

J. Bernhardt, A. Guerry, C.-K. Kim, M. Ruckelshaus, and J. Toft

fabiencousteau.org


Wave, Wind

Geomorphology, Relief

NOAA

Storm Surge

Natural Habitats

SaveGuanaCayReef


Wave, Wind

adclassix.com

Geomorphology, Relief

NOAA

Storm Surge

Marine InVEST

jimmymacofphoenix.com

Natural Habitats

SaveGuanaCayReef


Marine InVEST Models

Input Data (reflect scenarios)

Model Outputs

(ecosystem services & values)

ECOSYSTEM SERVICES

VALUATION

Value ofcarbon sequestered

Carbon Sequestration

Carbon

TERRESTRIAL SYSTEMS

Wave Energy

Value of captured wave energy

Wave

Energy

BIO-PHYSICAL

Coastal Protection

Avoided

Area

Avoided damages

Bathymetry & Topography

HabitatRisk

Species distribution

SCENARIOS

Value of recreation

activity

Recreation

Tourism Revenue

Oceanography

Habitat type

WaterQuality

Fishery

Landed

Biomass

Net present value of finfish and shellfish

SOCIO-ECONOMIC

Aquaculture

Harvested

Biomass

Population density

Visitation Rates

Aesthetic Quality

Aquaculture operation costs

Property values


Mapping Coastal Vulnerability to Erosion and Flooding


  • Oi!

  • Are there areas that are more exposed to impacts of high waves and winds than others?

  • Are there natural factors that can reduce these impacts?


  • Is this area vulnerable to erosion and inundation during storms?

  • How do changes in the natural environment affect that vulnerability?

  • Why does this bloody hell matter to peopleanyways?


  • Fascinating questions!

  • Let’s solve them, with the CV model!


Coastal Protection Model

Two Types of Habitats

Two Types of Hazards

Living

Erosion

Non-living

Flooding


Coastal Protection Model

Inputs

Coastal Vulnerability Model

  • Know the Environment

  • Evaluate Scenarios

Erosion/Inundation Model


Coastal Vulnerability Index

  • Qualitative assessment of vulnerability based on mixture of relative and absolute ranking of variables


Coastal Vulnerability Outputs


What’s in an Index?....rock


Living Things! (mostly)


Lots of Water…AND LAND!


Relative Sea Level Change

British Columbia. Ministry of Water, Land and Air Protection

Need to take land movement into account!


Coastal ExposureIndex?

Wind


Wind Exposure

U


Wave Exposure

U

Exposed shorelines: ocean waves

Sheltered shorelines: locally-generated waves


Flooding!


Coastal Vulnerability Index

  • Qualitative assessment of vulnerability based on mixture of relative and absolute ranking of variables


  • Example Inputs


  • Example Inputs


Vulnerability Index Output


  • Oh! And What Did Martha Say?

  • Why does this bloody hell matter to people anyways?


Limitations and Assumptions

- Complex coastal processes summarized by 7 variables

Screening Tool

- No prediction of shoreline change

Qualitative Tool

- Site-specific sediment transport patterns ignored

General Tool


Application


Model Steps

  • Run Fetch Calculator

    • Fetch distances

    • Exposed/Non-Exposed Shorelines

  • Run Vulnerability Index


Erosion/Inundation Model

Steve@Flickr


Erosion/Inundation Model


Erosion/Inundation Model

Can treat effects of coral reefs, mangroves, marshes, seagrass beds, oyster reefs and sand dunes


Example Outputs: Oyster Reefs

Fetch Distances

Bathymetry Cross-Section


Example Outputs: Oyster Reefs

Design Wave

H=1m; T=5s


Example Outputs: Seagrass Beds


Let’s Run the Model!


Model Interface


Parameters Table


Geomorphology

How to Represent Structures?


Natural Habitats

How/Why remove habitats in CV run?


Wind and Wave Data


Model Outputs

  • Vulnerability Index

  • Erosion Index

  • Inundation Index


Update – Ranking Natural Habitats

Current Ranking


Update – Ranking Natural Habitats

More habitats = more protection!


Wave Exposure – New Approach


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