Model:1DBreachingTurbidityCurrent

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1DBreachingTurbidityCurrent

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Summary Contact Technical specs In/Output Process Testing Other Component info 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 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, Name Esther 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 Name Enrica 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 Is this a data component Can be coupled with:

Model info Authors Esther Eke Viparelli Source code View in CSDMS GitHub repository Model citations Nr. of publications: 1 Total citations: 26 h-index: 1 m-quotient: 0.07 QR-code Link to this page Other models by author 1DBreachingTurbidityCurrent

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Nr. of publications:	1
Total citations:	26
h-index:	1
m-quotient:	0.07

Featured publication(s)	Year	Model described	Type of Reference	Citations
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)	2011	1DBreachingTurbidityCurrent	Model overview	26
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