Model:1DBreachingTurbidityCurrent

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1DBreachingTurbidityCurrent




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Also known as
Model type Single
Model part of larger framework
Incorporated models or components:
Spatial dimensions 1D
Spatial extent Watershed-Scale
Model domain Coastal
One-line model description 1D Breaching Turbidity current model for generating continuous turbidity currents
Extended model description The term “breaching” refers to the slow, retrogressive failure of a steep subaqueous slope, so forming a nearly vertical turbidity current directed down the face. This mechanism, first identified by the dredging industry, has remained largely unexplored, and yet evidence exists to link breaching to the formation of sustained turbidity currents in the deep sea. The model can simulate a breach-generated turbidity current with a layer-averaged formulation that has at its basis the governing equations for the conservation of momentum, water, suspended sediment and turbulent kinetic energy. In particular, the equations of suspended sediment conservation are solved for a mixture of sediment particles differing in grain size. In the model the turbidity current is divided into two regions joined at a migrating boundary: the breach face, treated as vertical, and a quasi-horizontal region sloping downdip. In this downstream region, the bed slope is much lower (but still nonzero), and is constructed by deposition from a quasi-horizontal turbidity current. The model is applied to establish the feasibility of a breach-generated turbidity current in a field setting, using a generic example based on the Monterey Submarine Canyon, offshore California, USA.
Keywords:

turbidity current,


First name Esther
Last name Eke
Type of contact Model developer
Institute / Organization Utah State University
Postal address 1
Postal address 2
Town / City Logan
Postal code 84322
State Utah
Country United States
Email address eceke2@gmail.com
Phone
Fax


First name Enrica
Last name Viparelli
Type of contact Model developer
Institute / Organization University of South Carolina
Postal address 1
Postal address 2
Town / City Columbia
Postal code
State South Carolina
Country United States
Email address VIPARELL@cec.sc.edu
Phone
Fax


Supported platforms Windows
Other platform
Programming language
Other program language VB, excel
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development 2011
Does model development still take place? No
If above answer is no, provide end year model development 2011
Code development status
When did you indicate the 'code development status'?
Model availability As code
Source code availability
(Or provide future intension)
Through CSDMS repository
Source web address
Source csdms web address https://github.com/csdms-contrib/1DBreachingTurbidityCurrent
Program license type GPL v3
Program license type other
Memory requirements --
Typical run time --


Describe input parameters Excel sheet. User can change initial geometry data (slope at top of breach, initial height of breach face, initial bed slope in quasi-horizontal region, initial location of breach face, initial length of quasi-horizontal region); sediment grain size distribution; sediment properties (bed porosity, breach porosity, bed friction coefficient, wall friction coefficient, submerged specific gravity); and time evolution (time step, number of time steps, initial number of nodes in horizontal, print interval, calculation time).
Input format ASCII
Other input format
Describe output parameters Current thickness, velocity, and D50 for active layer and in suspension.
Output format ASCII
Other output format graphs in excel sheet
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 The model solves both Gary Parker's three and four equation models for sediment mixtures. A condition was incorporated in the model to solve the equation of conservation of turbulent kinetic energy (fourth equation) and to decide how to estimate the friction coefficients.

See also: Eke, E., Viparelli, E., and Parker, G., 2011. Field-scale numerical modeling of breaching as a mechanism for generating continuous turbidity currents. Geosphere, 7, 1063-1076. Doi: 10.1130/GES00607.1
Describe key physical parameters and equations See: Eke, E., Viparelli, E., and Parker, G., 2011. Field-scale numerical modeling of breaching as a mechanism for generating continuous turbidity currents. Geosphere, 7, 1063-1076. Doi: 10.1130/GES00607.1
Describe length scale and resolution constraints --
Describe time scale and resolution constraints --
Describe any numerical limitations and issues --


Describe available calibration data sets The codes have been validated against laboratory experiments which are described in Eke's MS thesis. The results are summarized in her thesis and in a conference paper that she presented in Vancouver.
Upload calibration data sets if available: Media:Esther Eke.pdf
Describe available test data sets MS thesis
Upload test data sets if available:
Describe ideal data for testing


Do you have current or future plans for collaborating with other researchers? --
Is there a manual available? No
Upload manual if available:
Model website if any
Model forum / discussion board
Comments


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
Can be coupled with:
Model info
Esther Eke
Viparelli
Citation indices 1DBreachingTurbidityCurrent
Nr. of pubs: 1
Citations: 17
h-index: 1
Qrcode 1DBreachingTurbidityCurrent.png
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Citation indices 1DBreachingTurbidityCurrent
Nr. of pubs: 1
Citations: 17
h-index: 1



Featured publication(s)YearModel describedType of ReferenceCitations
Eke, Esther; Viparelli, Enrica; Parker, Gary; 2011. Field-scale numerical modeling of breaching as a mechanism for generating continuous turbidity currents. Geosphere, 7, 1063–1076. 10.1130/GES00607.1
(View/edit entry)
20111DBreachingTurbidityCurrent
Model overview 17
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