Summary
| Also known as
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| Model type
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Single
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| Model part of larger framework
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| Note on status model
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| Date note status model
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Technical specs
| Supported platforms
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Windows
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| Other platform
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| Programming language
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Fortran77, Fortran90
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| Other program language
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| Code optimized
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Single Processor
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| Multiple processors implemented
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| Nr of distributed processors
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| Nr of shared processors
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| Start year development
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2006
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| Does model development still take place?
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Yes
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| If above answer is no, provide end year model development
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| Code development status
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| When did you indicate the 'code development status'?
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| Model availability
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As code
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Source code availability
(Or provide future intension)
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Through owner"Through owner" is not in the list (Through web repository, Through CSDMS repository) of allowed values for the "Source code availability" property.
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| Source web address
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| Source csdms web address
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| Program license type
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Other
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| Program license type other
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Free
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| Memory requirements
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2GB
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| Typical run time
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hours
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In/Output
| Describe input parameters
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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).
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| Input format
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ASCII, Binary
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| Other input format
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| Describe output parameters
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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.
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| Output format
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ASCII, Binary
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| Other output format
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| Pre-processing software needed?
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No
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| Describe pre-processing software
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| Post-processing software needed?
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No
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| Describe post-processing software
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| Visualization software needed?
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Yes
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| If above answer is yes
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Matlab
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| Other visualization software
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Process
| Describe processes represented by the model
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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.
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| Describe key physical parameters and equations
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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.
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| Describe length scale and resolution constraints
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Vertically: cm to m, Horizontally: 50 m to 30 km
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| Describe time scale and resolution constraints
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Millennial scale
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| Describe any numerical limitations and issues
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--
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Testing
| Describe available calibration data sets
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--
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| Upload calibration data sets if available:
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| Describe available test data sets
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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.
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| Upload test data sets if available:
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| Describe ideal data for testing
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It would be interesting to have grainsize data in addition to the other data.
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Other
| Do you have current or future plans for collaborating with other researchers?
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--
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| Is there a manual available?
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No
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| Upload manual if available:
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| Model website if any
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| Model forum / discussion board
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BITM
Introduction
History
Papers
BITM Questionnaire
Contact Information
| Model:
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BITM
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| Contact person:
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Riccardo Masetti
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| Institute:
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University of Bologna
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| City:
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Bologna
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| Country:
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Italy
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| Email:
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riccardo.masetti@tele2.it
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| 2nd person involved:
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Sergio Fagherazzi (Project manager)
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| 3rd person involved:
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Alberto Montanari (Technical contact)
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Model description
| Model type:
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Single model for the coastal domain.
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| Description:
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BIT Model aims to simulate the dynamics of the principal processes that govern the formation and evolution of a barrier island. The model includes sea-level oscillations and sediment distribution operated by waves and currents. Each process determines the deposition of a distinct sediment facies, separately schematized in the spatial domain. Therefore, at any temporal step, it is possible to recognize six different stratigraphic units: bedrock, transitional, overwash, shoreface aeolian and lagoonal.
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Technical information
| Supported platforms:
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Windows
|
| Programming language:
|
Fortran77, Fortran90
|
| Model development started at:
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2006 and development still takes place.
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| To what degree will the model become available:
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Source code will be available
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| Current license type:
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Free
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| Memory requirements:
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2Gb
|
| Typical run time:
|
hours
|
Input / Output description
| 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
|
| 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
|
| Post-processing software (if needed):
|
No
|
| Visualization software (if needed):
|
Yes, Matlab
|
Process description
| Processes represented by 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.
|
| Key physical parameters & 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.
|
| Length scale & resolution constraints:
|
Vertically: cm to m, Horizontally: 50 m to 30 km
|
| Time scale & resolution constraints:
|
Millennial scale
|
| Numerical limitations and issues :
|
--
|
Testing
| Available calibration data sets:
|
--
|
| 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.
|
| Ideal data for testing:
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It would be interesting to have grainsize data in addition to the other data.
|
User groups
| Currently or plans for collaborating with:
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--
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Documentation
| Key papers of the model:
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Masetti, R., Fagherazzi, S., Montanari, A., 2008. Application of a barrier island translation model to the millennial-scale evolution of Sand Key, Florida. Continental Shelf Research 28, 1116-1126.
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| Is there a manual available:
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no
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| Model website if any:
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no
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Issues
Help
Input Files
Output Files
Download
Source |
