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Sea Level Affecting Marshes Model (SLAMM)

Simulates the dominant processes involved in wetland conversions during long term

sea level rise

Applied and improved since 1985

Used throughout the world

http://www.warrenpinnacle.com/prof/SLAMM/

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Sea Level Affecting Marshes Model (SLAMM)

Distance Inland

Ele

vatio

n

Tidal Flat Saltmarsh Scrub-Shrub or Brackish

Tidal Fresh and Dry Land MLW

MTL

MHW

Salt Boundary

3

Sea Level Affecting Marshes Model (SLAMM)

Distance Inland

Ele

vatio

n

Tidal Flat Saltmarsh Scrub-Shrub or Brackish

Tidal Fresh and Dry Land

MLW

MTL

MHW

Salt Boundary

Water

4

Model Parameters

Accretion = 3.8 mm/yr • Observations from NBNERR

(Raposa) • Consistent with Median Value

from Literature

105 Sub-Sites • Historic SLR Trend to estimate

subsidence/lift • Direction offshore • Erosion/sedimentation • Storm Frequency • Tidal Data

• Range • Datum Adjustment

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Model Limitations

Uncertainty in Sea Level Rise Projections Ground Conditions

• Some uplands may be more suitable than others • Multiple stressors on salt marshes • Freshwater wetlands may convert to open water

Model Simplifications

• Accretion rates are variable • Salinity dynamics are simplified

Changing Coastline

• Storm events • Barrier migration

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Model Input: LiDAR 2011

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Model Input: NWI 2010

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Model Results

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Model Results

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Sea Level Affecting Marshes Model (SLAMM)

Simulates the dominant processes involved in wetland conversions during long term

sea level rise

Applied and improved since 1985

Used throughout the world

http://www.warrenpinnacle.com/prof/SLAMM/