Model:SimClast

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SimClast

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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 Spatial dimensions 3D Spatial extent Model domain Coastal, Marine, Terrestrial 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. Keywords: stratigraphic model, river, coast, 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 Netherlands Email address r.a.f.dalman@tudelft.nl Phone +31 (0) 15 27 83677 Fax +31 (0) 15 27 81189 Supported platforms Windows Other platform Programming language Fortran77, Fortran90 Other program language Code optimized Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1998 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, As teaching tool Source code availability (Or provide future intension) Source web address Source csdms web address Program license type GPL v2 Program license type other Memory requirements 1Gb Typical run time 5 minutes up to 24 hours 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 Other input format Describe output parameters 3D stratigraphy (age, provenance, grainsize, peat fraction) Morphodynamic maps of grainsize, discharge, sediment erosion and deposition Output format ASCII 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 Surfer 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 Describe available calibration data sets tba (see current work in progress) Upload calibration data sets if available: Describe available test data sets For now only a basic synthetic surface. Upload test data sets if available: 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. 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). 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 Rory Dalman Source code Model citations Nr. of publications: -- Total citations: 0 h-index: --"--" is not a number. m-quotient: 0 QR-code Link to this page Other models by author SimClast

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