Model:Cross Shore Sediment Flux


Cross Shore Sediment Flux


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 1D
Spatial extent Landscape-Scale
Model domain Coastal
One-line model description Cross-Shore Sediment Flux Equations
Extended model description The Cross-Shore Sediment Flux model addresses predominately sandy, wave-dominated coastlines on time-scales ranging from years to millenia and on spatial scales ranging from kilometers to tens of kilometers using a range of wave parameters as inputs. It calculates the cross-shore sediment flux using both shallow water wave assumptions and full Linear Airy wave Theory. An equilibrium profile is also created. Using the Exner equation, we develop an advection diffusion equation that describes the evolution of profile through time. A morphodynamic depth of closure can be estimated for each input wave parameter.

coastal sediment transport, coastal evolution,

Name Alejandra Ortiz
Type of contact Model developer
Institute / Organization Woods Hole Oceanographic Institution
Postal address 1
Postal address 2
Town / City Woods Hole
Postal code 02543
State Massachusetts
Country United States
Email address

Supported platforms
Linux, Mac OS, Windows
Other platform
Programming language


Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development
Does model development still take place? No
If above answer is no, provide end year model development
Code development status
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Model availability As code
Source code availability
(Or provide future intension)
Through CSDMS repository
Source web address
Source csdms web address
Program license type GPL v2
Program license type other
Memory requirements
Typical run time

Describe input parameters You can vary the initial slope, wave periods, wave heights, and sediment fall velocity (a proxy for sediment size).
Input format
Other input format
Describe output parameters It outputs all the variables used in the advection-diffusion equation describing bed evolution for both shallow water wave assumptions (all labeled as *_s) and linear theory (labeled as *_lh).
Output format
Other output format
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 Using energetics-based formulations for wave-driven sediment transport, we develop a robust methodology for estimating the morphodynamic evolution of a cross-shore sandy coastal profile. The wave-driven cross-shore

sediment flux depends on three components: two onshore-directed terms (wave asymmetry and wave streaming) and an offshore-directed slope term. The cross-shore sediment transport formulation defines a dynamic equilibrium profile and, by perturbing about this steady-state profile, we present an advection-diffusion formula for profile evolution. Morphodynamic Péclet analysis suggests that the shoreface is diffusionally dominated. Using this depth-dependent characteristic diffusivity timescale, we distinguish a morphodynamic depth of closure for a given time envelope. Even though wave-driven sediment transport can (and will) occur at deeper depths, the rate of morphologic bed changes in response to shoreline change becomes increasingly slow below this morphodynamic closure depth.

Describe key physical parameters and equations
Describe length scale and resolution constraints
Describe time scale and resolution constraints
Describe any numerical limitations and issues

Describe available calibration data sets
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Do you have current or future plans for collaborating with other researchers?
Is there a manual available? No
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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
Is this a data component
Can be coupled with:
Model info
Nr. of publications: 1
Total citations: 51
h-index: 1
m-quotient: 0.12
Qrcode Cross Shore Sediment Flux.png
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Featured publication(s)YearModel describedType of ReferenceCitations
Ortiz, Alejandra C.; Ashton, Andrew D.; 2016. Exploring shoreface dynamics and a mechanistic explanation for a morphodynamic depth of closure: Morphodynamic Depth of Closure. Journal of Geophysical Research: Earth Surface, 121, 442–464. 10.1002/2015JF003699
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2016 Cross Shore Sediment Flux
Model overview 51
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Input Files

Output Files