SLAMM Data and Resources

Soundwide and State Projected Land Cover Change Data

The following data tables present SLAMM projections of land cover change for Long Island Sound coastal areas affected by sea level rise for the entire Sound as well as by state under moderate and extreme sea level rise scenarios.

Click the table images for an enlarged view.

Soundwide Data Table

View Soundwide Data

Connecticut Data Table

View Connecticut Data

New York Data Table

 View New York Data

SLAMM Raw Data, Final Reports, and Other Useful Resources

Raw Data and Final Reports

SLAMM raw data and final reports for the LISS project (CT and Westchester County):

SLAMM raw data and final reports for the NYSERDA project (Suffolk, Nassau, NYC counties, and Hudson Valley):                                   

Advancing Existing Assessment of Connecticut Marshes’ Response to SLRfinal report prepared by Warren Pinnacle for the Northeast Regional Oceans Council.

Application of Sea-Level Affecting Marshes Model (SLAMM) to Long Island, NY and New York Citya final report prepared by New York State
Energy Research and Development Authority.

Related Resources

The Nature Conservancy’s Coastal Resilience Tool

This Web-based tool allows users to investigate the SLAMM results and examine other geographic layers. Users must select their state from the list and then select the Futures Habitat tab on the left in order to see the various SLR scenarios for their area. Once you select your area to view you can use the slide bar to change the SLR scenarios and the timeframe. There is also a tab in the box that brings you the Warren Pinnacle website to choose the SLAMM final reports. The SLAMM work is only available for Suffolk, Nassau, NYC counties, Hudson in NY (NYSERDA project results) at the moment but will soon include CT and Westchester County results (LISS project results).

Sea-Level Rise (SLR) Modeling Handbook, USGS Guide (2015)

Describes and classifies the suite of SLR data, methods, and models and their design, structure, and application for hindcasting and forecasting the potential impacts of sea-level rise in coastal ecosystems. The data and models cover a broad spectrum of disciplines involving different designs and scales of spatial and temporal complexity for predicting environmental change and ecosystem response to SLR. A helpful webinar describing the Handbook can be accessed at

Make Way for Marshes, Northeast Region Ocean Council (2017)

The report Make Way for Marshes: Guidance on Using Models of Tidal Marsh Migration to Support Community Resilience to Sea Level Rise covers the entire modeling lifecycle from developing a modeling approach and working with data to communicating modeling results. The guidance was developed through expert interviews, a regional workshop of practitioners and scientists, and a scientific and technical literature review. While some of the information pertains specifically to NROC’s region of interest in the northeastern United States, the report is also intended as a useful resource for modeling of marsh migration in other regions. Available as a web-published report or the NROC website.

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