Also known as
Model type Single
Model part of larger framework
Note on status model
Date note status model
Incorporated models or components:
Spatial dimensions 2D
Spatial extent Landscape-Scale, Regional-Scale, Watershed-Scale
Model domain Terrestrial, Hydrology, Cryosphere
One-line model description 2D semi-implicit shallow ice approximation glacier model
Extended model description IceFlow simulates ice dynamics by solving equations for internal deformation and simplified basal sliding in glacial systems. It is designed for computational efficiency by using the shallow ice approximation for driving stress, which it solves alongside basal sliding using a semi-implicit direct solver. IceFlow is integrated with GRASS GIS to automatically generate input grids from a geospatial database.


Name Andy Wickert
Type of contact Model developer
Institute / Organization University of Colorado
Postal address 1 Institute of Arctic and Alpine Research
Postal address 2 1560 30th St.
Town / City Boulder
Postal code 80303
State Colorado
Country United States
Email address

Name William Colgan
Type of contact Model developer
Institute / Organization Geological Survey of Denmark and Greenland
Postal address 1 Øster Voldgade 10
Postal address 2
Town / City Copenhagen K
Postal code DK-1350
Country Denmark
Email address

Supported platforms
Unix, Linux, Mac OS, Windows
Other platform
Programming language


Other program language
Code optimized Single Processor
Multiple processors implemented
Nr of distributed processors
Nr of shared processors
Start year development
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 web repository
Source web address
Source csdms web address
Program license type GPL v3
Program license type other
Memory requirements
Typical run time minutes

Describe input parameters Topography, mass balance
Input format ASCII, Binary
Other input format Automated generation from GIS (GRASS)
Describe output parameters ice thickness, ice velocity
Output format ASCII, Binary
Other output format
Pre-processing software needed? No
Describe pre-processing software
Post-processing software needed? No
Describe post-processing software
Visualization software needed? No
If above answer is yes
Other visualization software

Describe processes represented by the model Ice deformation, ice sliding
Describe key physical parameters and equations [[Describe key physical parameters::Shallow ice approximation [test equation markup here]]]
Describe length scale and resolution constraints No longitudinal coupling, not full Stokes
Describe time scale and resolution constraints 2D grid, variable dx and dy possible
Describe any numerical limitations and issues Some time step limitations due to the *semi* implicit nature of the code

Describe available calibration data sets
Upload calibration data sets if available:
Describe available test data sets
Upload test data sets if available:
Describe ideal data for testing

Do you have current or future plans for collaborating with other researchers? Leif Anderson (U. Colorado) -- ongoing
Is there a manual available? No
Upload manual if available:
Model website if any
Model forum / discussion board

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
Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0
Qrcode IceFlow.png
Link to this page



IceFlow was originally written in Matlab by William Colgan. In 2014, Andrew Wickert translated it into Python and added an automated interface to retrieve input data from a GRASS GIS location.


Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0

See more publications of IceFlow



Input Files

Output Files