Model:AquaTellUs

AquaTellUs

Metadata

Also known as
Model type	Single
Model part of larger framework

Incorporated models or components:

Spatial dimensions	2D
Spatial extent	Regional-Scale
Model domain	Terrestrial, Coastal
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,

First name	Irina
Last name	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	United States
Email address	irina.overeem@colorado.edu
Phone	303-492-6631
Fax

Supported platforms	Unix, Mac OS, 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	As is, no updates are provided
When did you indicate the 'code development status'?	2020
Model availability	As code
Source code availability (Or provide future intension)	Through CSDMS repository
Source web address
Source csdms web address	https://github.com/csdms-contrib/aquatellus
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.

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

DOI model	10.1594/IEDA/100089
For model version	1.0
Year version submitted	2011
Link to file	https://csdms.colorado.edu/pub/models/doi-source-code/aquatellus-10.1594.IEDA.100089-1.0.tar.gz