Model:SimClast: Difference between revisions
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{{Modeler information | |||
|First name=Rory | |||
|Last name=Dalman | |||
|Type of contact=Model developer | |||
|Institute / Organization=Delft university of Technology | |||
|Postal address 1=P.O.Box 5048 | |||
|Town / City=Delft | |||
|Postal code=2600GA | |||
|State=NO STATE | |||
|Country=The Netherlands | |||
|Email address=r.a.f.dalman@tudelft.nl | |||
|Phone=+31 (0) 15 27 83677 | |||
|Fax=+31 (0) 15 27 81189 | |||
}} | |||
{{Model identity | |||
|Model type=Single | |||
|Categories=Coastal, Marine, Terrestrial | |||
|Spatial dimensions=3D | |||
|One-line model description=basin-scale 3D stratigraphic model | |||
|Extended model description=SimClast is a basin-scale 3D stratigraphic model, which allows several interacting sedimentary environments. Processes included are; fluvial channel dynamics and overbank deposition, river plume deposition, open marine currents, wave resuspension, nearshore wave induced longshore and crosshore transport. This combined modelling approach allows insight into the processes influencing the flux of energy and clastic material and the effect of external perturbations in all environments. Many governing processes work on relatively small scales, e.g. in fluvial settings an avulsion is a relatively localised phenomenon. Yet, they have a profound effect on fluvial architecture. This means that the model must mimic these processes, but at the same time maintain computational efficiency. Additionally, long-term models use relatively large grid-sizing (km scale), as the area to be modelled is on the scale of continental margins. We solve this problem by implementing the governing processes as sub-grid scale routines into the large-scale basin-filling model. This parameterization greatly refines morphodynamic behaviour and the resulting stratigraphy. This modelling effort recreates realistic geomorphological and stratigraphic delta behaviour in river and wave-dominated settings. | |||
}} | |||
{{Model technical information | |||
|Supported platforms=Windows | |||
|Programming language=Fortran77, Fortran90 | |||
|Start year development=1998 | |||
|Does model development still take place?=Yes | |||
|Model availability=As code, As teaching tool, As executable | |||
|Source code availability=Through owner | |||
|Program license type=GPL v2 | |||
|OpenMI compliant=No but possible | |||
|CCA component=No but possible | |||
|IRF interface=No but possible | |||
|Memory requirements=1Gb | |||
|Typical run time=5 minutes up to 24 hours | |||
}} | |||
{{Input - Output description | |||
|Describe input parameters=Parameters: | |||
*Sealevel curve | |||
*subsidence | |||
*rainfall (variable through time) | |||
*multiple rivers with variable discharge and sediment load through time | |||
*initial topography | |||
*wind velocity and direction/or wave height and propagation direction | |||
*marine current velocity and location | |||
*sediment transport parameters | |||
*number of grainsizes, grainsize dimensions and density | |||
*fluvial channel dimensions | |||
|Input format=ASCII | |||
|Describe output parameters=3D stratigraphy (age, provenance, grainsize, peat fraction)<br>Morphodynamic maps of grainsize, discharge, sediment erosion and deposition | |||
|Output format=ASCII | |||
|Pre-processing software needed?=No | |||
|Post-processing software needed?=No | |||
|Visualization software needed?=Yes | |||
|If above answer is yes=Matlab | |||
|Other visualization software=Surfer | |||
}} | |||
{{Process description model | |||
|Describe processes represented by the model=*Fluvial/alluvial processes; | |||
**Aggrading fluvial channels in one gridcell with crevasse. Subgrid sedimentation mimics alluvial ridge aggradation and overbank deposition. Avulsions are modelled one dimensionally by calculating the flow and sediment transport at prospective avulsion nodes. See also Dalman & Weltje (2008). | |||
*Floodplain processes; | |||
**Differential compaction, groundwater table, peat growth and overbank deposition | |||
*Hypopycnal plume and marine currents: | |||
**Rivers deliver sediment and water to the sea, where the river momentum spreads the suspended sediment in a plume. Multiple plumes and longshore current hydrodynamics are calculated using a potential flow routine. Subsequent sedimentation due to fallout uses the removal rate principle after Syvitski et al (1988). | |||
*Wave resuspension and crosshore transport; | |||
**Waves are modelled using linear Airy and Stokes wave theory. Deepwater wave height is derived from a Gaussian distribution to represent natural storm variability The asymmetric waves preferentially transport the sands (bedload fraction) shorewards and the fines (suspended load fraction) offshore. In combination with a littoral drift routine this allows waves to rework and transport sediments. | |||
|Describe key physical parameters and equations=tba | |||
|Describe length scale and resolution constraints=SimClast can theoretically be used on a length scale upwards of 20 kms, the upper limit is dependant on memory and processing restrictions. Typical length scales vary from 25 to 500 km. The highest resolution is mainly dependant on the use of intracellular fluvial deposition, as described in Dalman & Weltje (2008) this restricts the minimum cell size to 4 kms. Recent addition of floodplain process reduces this to 500 m. | |||
|Describe time scale and resolution constraints=Total time scale is merely dependant on computing time, typically on the order of several thousands to 100,000 years. Time steps are restricted to 1 year. | |||
|Describe any numerical limitations and issues=tba | |||
}} | |||
{{Model testing | |||
|Describe available calibration data sets=tba (see current work in progress) | |||
|Describe available test data sets=For now only a basic synthetic surface. | |||
|Describe ideal data for testing=ClastSim is ideally used for field tests, a preferably well-studied area with some knowledge of the sediment budget is preferred. Most continental to shallow marine clastic coastal systems without too much tidal influence can be used. | |||
}} | |||
{{Users groups model | |||
|Do you have current or future plans for collaborating with other researchers?=Current work in progress, will be updated when ready; Holocene development of the Rhine-Meuse delta (Utrecht University). Late Quaternary morphology and stratigraphy of the Northern Adriatic Basin. Large-scale stratigraphic patterns on the Vietnam shelf since the LGM (University of Kiel). | |||
}} | |||
{{Documentation model | |||
|Provide key papers on model if any=Dalman, R.A.F., & Weltje, G.J., 2008. Sub-grid parameterisation of fluvio-deltaic processes and architecture in a basin-scale stratigraphic model. Computers & Geosciences, Computers & Geosciences; Predictive Modeling in Sediment Transport and Stratigraphy. Volume 34, Issue 10, October 2008, Pages 1370-1380 | |||
|Manual model available=No | |||
|Model website if any=-- | |||
}} | |||
{{Additional comments model | |||
|Comments=-- | |||
}} | |||
{{Infobox Model | {{Infobox Model | ||
|model name = SimClast | |model name = SimClast |
Revision as of 10:26, 18 September 2009
Contact
Name | Rory Dalman |
Type of contact | Model developer |
Institute / Organization | Delft university of Technology |
Postal address 1 | P.O.Box 5048 |
Postal address 2 | |
Town / City | Delft |
Postal code | 2600GA |
State | NO STATE |
Country | The Netherlands"The Netherlands" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property. |
Email address | r.a.f.dalman@tudelft.nl |
Phone | +31 (0) 15 27 83677 |
Fax | +31 (0) 15 27 81189 |
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