Model-derived backbarrier marsh width from GEOMBEST+ simulations of barrier island-marsh coupled evolution for a range of environmental conditions.

Model-derived backbarrier marsh width from GEOMBEST+ simulations of barrier island-marsh coupled evolution for a range of environmental conditions. The input parameters were varied for a range of 10 different values for each of the flux of overwash (.2-2 m^3/yr), the rate of sea level rise (1-10mm/yr), and the flux of bay sediment (2-20 m^3/yr) Each simulation was for a one meter change in sea level, starting from one of three initial conditions, an empty backbarrier basin, starting with a narrow (400m wide) backbarrier marsh, and starting with a marsh-filled (2000m wide) backbarrier basin. With 10 variants of each parameter input and 3 initial conditions, this results in 3,000 total simulations run. Each row in the spreadsheet contains the input and output values for an individual simulation. The outputs reported are the final backbarrier marsh width, defined as the distance from the backside of the barrier island to the landward most marsh cell, the change in marsh width, and the rate of change in marsh width.