Sea Level Rise Affecting Marshes Model (SLAMM)

The Sea Level Rise Affecting Marshes Model (SLAMM), from the U.S. Fish and Wildlife Service, is an online modeling tool designed to present sea-level rise scenarios to the public. It can be used to inform adaptation efforts including restoration of marshes, strategic land acquisitions, and infrastructure management. 

The model allows users to compare current and future conditions, side-by-side, on how a single coastal area will be affected by different sea-level rise scenarios. Users can view these scenarios at five different time points: the base year, 2025, 2050, 2075, and 2100. The model displays inundation, erosion, and sediment and organic matter accumulation. SLAMM also predicts changes in coastal wetlands and shorelines.

To date, SLAMM-View provides access to simulation results for the entire coastlines of five states, and partial coverage of an additional four states, including the Chesapeake Bay, the Georgia and South Carolina Coasts, and the Puget Sound/Northwest Coast. As data becomes available, more map layers and simulations will be made available to the public, including site-specific SLAMM simulations for Chincoteague National Wildlife Refuge.

Publication Date: April 9, 2010

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  • Modeling tool

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