Model:BITM

Contact

Name	Riccardo Masetti
Type of contact	Model developer
Institute / Organization	University of Bologna
Postal address 1	V.le Risorgimento, 2
Postal address 2
Town / City	Bologna
Postal code	40126
State	NO STATE
Country	Italy
Email address	riccardo.masetti@tele2.it
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Fax

Name	Sergio Fagherazzi
Type of contact	Project manager
Institute / Organization
Postal address 1
Postal address 2
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Name	Alberto Montanari
Type of contact	Technical contact
Institute / Organization
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BITM

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Summary Also known as Model type Single Model part of larger framework Note on status model Date note status model Technical specs Supported platforms Windows Other platform Programming language Fortran77, Fortran90 Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 2006 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property. Source web address Source csdms web address Program license type Other Program license type other Free Memory requirements 2GB Typical run time hours In/Output Describe input parameters Sea level curve; rate of lagoonal deposition; rate of overwash; initial shelf profile. The stratigraphic data are organized in a matrix of integers. Every matrix entry corresponds to a stratigraphic unit (bedrock, overwash, transitional, shoreface, aeolian and lagoonal). Input format ASCII, Binary Other input format Describe output parameters Resultant barrier island configuration and sediment distribution along the continental shelf as results of the effects of five different processes: reworking of the beach profile, inner-shelf sediment redistribution, overwash, laggonal deposition and aeolian sediment reworking. Output format ASCII, Binary Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? No Describe post-processing software Visualization software needed? Yes If above answer is yes Matlab Other visualization software Process Describe processes represented by the model BIT Model takes into consideration five different processes: reworking of the beach profile. The model assumes that the wave action reworks the beach profile towards an equilibrium configuration described by the Dean's equation; inner-shelf sediment redistribution, which is the redistribution of sediments beyond the beach toe determined by the bottom shear stresses produced by wind waves; overwas, which is the erosion of sediment along the beach profile and its corresponding deposition on the top of the barrier island or in the back-barrier area. Overwash is related to storm surges produced bt extreme atmospheric events; lagoonal deposition, which is the deposition of fine sediments in the accomodation space between the barrier island and the mainland; aeolian sediment reworking, which represents the wind action on the subaerial part of the island. Describe key physical parameters and equations The dynamics of erosion and deposition are schematized with a relationship, which represents a diffusion scheme that changes the bottom elevation at a rate linearly proportional to the difference between the current and the equilibrium profile, defined by the Dean's equation, and then redistributes the removed or deposited material in equal parts between the contiguous inshore and offshore locations. The phenomenon of overwash is schematized assuming that the first shoreface element of the barrier island is eroded of a quantity, which is related to the frequency of hurricanes and severe storms and to the difference between the maximum elevation of the barrier and the mean sea level. Describe length scale and resolution constraints Vertically: cm to m, Horizontally: 50 m to 30 km Describe time scale and resolution constraints Millennial scale Describe any numerical limitations and issues -- Testing Describe available calibration data sets -- Upload calibration data sets if available: Describe available test data sets In order to verify the millennial-scale evolution of a barrier island, it is necessary to know the sea level curve, the rate of lagoonal deposition, the rate of overwash and the initial shelf profile. The BIT Model has been applied to the shelf profile in front of Sand Key, Florida. Upload test data sets if available: Describe ideal data for testing It would be interesting to have grainsize data in addition to the other data. Other 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 -- Introduction History Papers Issues Help Input Files Output Files Download Source