NOAA Coastal Services Center

Digital Coast

Tools

Sea Level Affecting Marshes Model

Originally developed with funding from the U.S. Environmental Protection Agency and now freely distributed by Warren Pinnacle Consulting, Inc.

This mathematical model uses digital elevation data and other information to simulate potential impacts of long-term sea level rise on wetlands and shorelines. SLAMM has been used in several geographies and applications across the nation since its development in the mid-1980s.

Features
  • Addresses inundation, erosion, overwash, saturation, and salinity for wetland scenarios
  • Computes relative sea level change for time sequences of 5 to 25 years
  • Incorporates areas protected by dikes and other hard structures if needed
  • Incorporates sedimentation and accretion rates
  • Provides several options for computing erosion
  • Incorporates standard coastal wetland classes
  • Provides outputs that can be viewed in a geographic information system (GIS) or other software for additional analysis