Also known as
Model type Single
Model part of larger framework
Note on status model
Date note status model
Incorporated models or components:
Spatial dimensions 2D
Spatial extent Landscape-Scale
Model domain Coastal
One-line model description Geomorphic Model of Barrier, Estuarine, and Shoreface Translations + Marsh + Seagrass
Extended model description GEOMBEST++Seagrass is a morphological-behaviour model that simulates the evolution of coastal morphology and stratigraphy resulting from changes in sea level and sediment volume within the shoreface, barrier, and estuary. GEOMBEST++Seagrass builds on previous iterations (i.e. GEOMBEST, GEOMBEST+, and GEOMBEST++) by incorporating seagrass dynamics into the back-barrier bay.

barrier island, seagrass, marsh, coastal evolution,

Name Ian Reeves
Type of contact Model developer
Institute / Organization University of North Carolina at Chapel Hill
Postal address 1 104 South Road
Postal address 2
Town / City Chapel Hill
Postal code 27599
State North Carolina
Country United States
Email address

Name Laura Moore
Type of contact
Institute / Organization University of North Carolina at Chapel Hill
Postal address 1 104 South Road
Postal address 2
Town / City Chapel Hill
Postal code 27599
State North Carolina
Country United States
Email address

Supported platforms
Other platform
Programming language


Other program language
Code optimized
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2017
Does model development still take place? Yes
If above answer is no, provide end year model development
Code development status Active
When did you indicate the 'code development status'? 2020
Model availability As code, As teaching tool
Source code availability
(Or provide future intension)
Through CSDMS repository
Source web address
Source csdms web address
Program license type GPL v3
Program license type other
Memory requirements
Typical run time Minutes to hours

Describe input parameters Note: See the GEOMBEST++Seagrass Users Guide, section 6

A minimum of four Microsoft Excel files are required to run a simulation: an “erosionresponse” file, an “accretionresponse” file, a “run#” file, and a “tract#” file. If the simulation involves a single coastal tract then the files must be titled “erosionresponse”, “accretionreponse”, “run1” file and “tract1.” Caution: Note that the run# and tract# files will have the same name (tract1, run1, etc.) for all simulations, so attention to organization is critical.

Input format
Other input format Excel spreadsheet
Describe output parameters Barrier island, marsh, and bay morphology and stratigraphy over time.

See User's Guide and Moore et al., 2010 for more details.

Output format
Other output format MAT-file
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? No
If above answer is yes
Other visualization software

Describe processes represented by the model Note: See also the GEOMBEST++Seagrass Users Guide, section 4

Seagrass wave attenuation and bay depth effects Equilibrium profile & barrier transgression Sea level rise Back-barrier deposition Marsh expansion/contraction Marsh wave erosion

Describe key physical parameters and equations
Describe length scale and resolution constraints Cell length: 10 - 100 m (typically 50 m)

Cell height 0.01 - 0.5 m (typically (0.1 m)

Describe time scale and resolution constraints Time step: 2-50 years (typically 10 years)

Duration: Centuries to millennia

Describe any numerical limitations and issues

Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets Sample input and output files are included with the code.
Upload test data sets if available: Media:ExampleInputs
Describe ideal data for testing

Do you have current or future plans for collaborating with other researchers?
Is there a manual available? Yes
Upload manual if available: Media:Geombest++Seagrass Users Guide v2019.pdf
Model website if any
Model forum / discussion board

This part will be filled out by CSDMS staff

OpenMI compliant No but possible
BMI compliant No but possible
WMT component No but possible
PyMT component No but possible
Is this a data component
DOI model 10.5281/zenodo.3242095
For model version Version 1.0
Year version submitted 2019
Link to file
Can be coupled with:
Model info




Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0

Featured publication(s)YearModel describedType of ReferenceCitations
Reeves, I. R. B.; Moore, L. J.; Goldstein, E. B.; Murray, A. B.; Carr, J. A.; Kirwan, M. L.; 2020. Impacts of Seagrass Dynamics on the Coupled Long‐Term Evolution of Barrier‐Marsh‐Bay Systems. Journal of Geophysical Research: Biogeosciences, 125, . 10.1029/2019JG005416
(View/edit entry)
2020 GEOMBEST++Seagrass
Model overview 8
See more publications of GEOMBEST++Seagrass



Input Files

Output Files