Model:AquaTellUs

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AquaTellUs

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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 2D Spatial extent Model domain One-line model description Fluvial-dominated delta sedimentation model Extended model description AquaTellUs models fluvial-dominated delta sedimentation. AquaTellUS uses a nested model approach; a 2D longitudinal profiles, embedded as a dynamical flowpath in a 3D grid-based space. A main channel belt is modeled as a 2D longitudinal profile that responds dynamically to changes in discharge, sediment load and sea level. Sediment flux is described by separate erosion and sedimentation components. Multiple grain-size classes are independently tracked. Erosion flux depends on discharge and slope, similar to process descriptions used in hill-slope models and is independent of grain-size. Offshore, where we assume unconfined flow, the erosion capacity decreases with increasing water depth. The erosion flux is a proxy for gravity flows in submarine channels close to the coast and for down-slope diffusion over the entire slope due to waves, tides and creep. Erosion is restricted to the main flowpath. This appears to be valid for the river-channel belt, but underestimates the spatial extent and variability of marine erosion processes. Deposition flux depends on the stream velocity and on a travel-distance factor, which depends on grain size (i.e. settling velocity). The travel-distance factor is different in the fluvial and marine domains, which results in a sharp increase of the settling rate at the river mouth, mimicking bedload dumping. Dynamic boundary conditions such as climatic changes over time are incorporated by increasing or decreasing discharge and sediment load for each time step. Keywords: coastal evolution, Name Irina Overeem Type of contact Model developer Institute / Organization CSDMS, INSTAAR, University of Colorado Postal address 1 1560 30th street Postal address 2 Town / City Boulder Postal code 80305 State Colorado Country USA"USA" 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 irina.overeem@colorado.edu Phone 303-492-6631 Fax Supported platforms Windows Other platform Programming language C Other program language Code optimized Single Processor Multiple processors implemented Nr of distributed processors Nr of shared processors Start year development 1997 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 CSDMS repository Source web address Source csdms web address Program license type Other Program license type other -- Memory requirements High Typical run time hours Describe input parameters Simulation time (t) and time step (dt), Initial grid size and slope, Incoming discharge and sediment load (t), Sea level (t), no of grain size classes, grain size distribution, grain size. Sediment transport coeficients Input format ASCII Other input format Describe output parameters Grid of deposition of different grains over time. The model generates postscript files of stratigraphic sections. Output format ASCII Other output format Pre-processing software needed? No Describe pre-processing software Post-processing software needed? Yes Describe post-processing software Grid plotting software, Postscript plotting software Visualization software needed? Yes If above answer is yes Matlab Other visualization software SURFER/GRAPHER Describe processes represented by the model Fluvial erosion and depositions, lateral deposition across the floodplain, plume deposition in marine domain. Describe key physical parameters and equations See references. Describe length scale and resolution constraints The model domain starts in the fluvial floodplain, the main river channel is considered an incoming boundary condition. Gridcells are typically averaged over 100's meters to 1000's of meters. Tests ran with grids of 150 by 150 km. Describe time scale and resolution constraints Developed as a stratigraphic model, approach is event-based. Intended time scale ranges from several decades to Holocene (10-10.000yrs). Describe any numerical limitations and issues Code is research grade Describe available calibration data sets Not readily available; theoretical experiments are available as examples. Upload calibration data sets if available: Describe available test data sets AquaTellUs was originally developed for simulation of the fluvial-dominated Volga delta. The 2D experiments are still available and can be used as a test data set. Upload test data sets if available: Describe ideal data for testing Boundary conditions like river discharge and sediment loads, input grainsize data, sea level history. Floodplain and deltaic sedimentation rates and grainsize data. Do you have current or future plans for collaborating with other researchers? Intent to use for braided Arctic fan deltas. CSDMS group is currently working on floodplain processes and bedload distribution patterns based on RS data. Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments Code is research grade and needs to be refractored before submission to CSDMS. This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component In progress PyMT component Is this a data component Can be coupled with:

Model info Authors Irina Overeem Source code View in CSDMS GitHub repository DOI Download AquaTellUs version: 1.0 Doi: 10.1594/IEDA/100089 Model citations Nr. of publications: 5 Total citations: 129 h-index: 4 m-quotient: 0.17 QR-code Link to this page Other models by author AquaTellUs CMIP Frost Model Kudryavtsev Model River Temperature Model

Download statistics

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Papers

Overeem, I. 2002. Process-response simulation of fluvio-deltaic stratigraphy. Delft University of Technology PhD thesis. ISBN 90 6464 859X.

Overeem, I., Veldkamp, A., Tebbens, L., and Kroonenberg, S.B., 2003. Modelling Holocene stratigraphy and depocentre migration of the Volga delta due to Caspian Sea-level change. Sedimentary Geology 159, 159-175.

Overeem, I., Syvitski, J.P.M., and Hutton, E.W.H., 2005. Three-dimensional numerical modeling of deltas. SEPM Spec. Issue, 83. ‘River Deltas: concepts, models and examples’. p.13-30.