The document discusses sea level rise impacts and considerations for resilience planning in Great Marsh communities. It provides an overview of coastal inundation mapping elements like tide ranges, sea level rise projections, and elevation data. Critical factors for modeling marsh migration under sea level rise are examined, such as sediment accretion rates. The document also analyzes how development and infrastructure can limit natural marsh migration inland. Strategies to support natural resilience by allowing natural processes like wetland migration are suggested.