Great Barnstable Marsh Case Study Select parameters you would like to change for Great Barnstable Marsh, MA. 1. Tidal classification: Mesotidal (Spring Tidal Range ~ 3.8m) 2. Suspended sediment concentration: 30 (mg/l) 3. Future sea-level rise rate: 3 (mm/yr) 6 (mm/yr) 9 (mm/yr) 4. Future maintenance: 0 (%) maintenance 50 (%) ditches 100 (%) ditches 50 (%) runnels 100 (%) runnels 5. Time horizon: Present Day (modeled) 2050 2100 Enter Elevation Results Accretion Results Summary Elevation Results Distribution of elevation relative to mean sea level for the near-channel and interior marsh. Percent area of marsh habitats for the near-channel and interior marsh. Accretion Results Distribution of accretion rates (mm/yr) for the near-channel and interior marsh. Summary This figure demonstrates the change over time (present day to 2100) for the different categories of marsh habitats based on the selected parameters.