From csdms
[edit] Caesar
Contents |
[edit] Metadata
| Modeler information | |
|---|---|
| First name | Tom |
| Last name | Coulthard |
| Type of contact | Model developer |
| Institute / Organization | University of Hull |
| Postal address 1 | Cottingham Road |
| Postal address 2 | |
| Town / City | Hull |
| Postal code | HU6 7RX |
| State | NO STATE |
| Country | United Kingdom |
| Email address | T.Coulthard@hull.ac.uk |
| Phone | |
| Fax | |
| Model identity | |
|---|---|
| Model type | Modular |
| Spatial dimensions | |
| Spatial extent | |
| Model domain | |
| One-line model description | Cellular landscape evolution model |
| Extended model description | CAESAR is a cellular landscape evolution model, with an emphasis on fluvial processes, including flow routing, multi grainsize sediment transport. It models morphological change in river catchments. |
| Model technical information | |
|---|---|
| Supported platforms | Linux, Windows |
| Other platform | |
| Programming language | C |
| Other program language | C# |
| Code optimized | |
| Start year development | 1996 |
| Does model development still take place? | Yes |
| If above answer is no, provide end year model development | |
| Model availability | As code, As teaching tool, As executable |
| Source code availability (Or provide future intension) | Through owner |
| Source web address | |
| Program license type | Other |
| Program license type other | GNU |
| OpenMI compliant | No not possible |
| CCA component | No not possible |
| IRF interface | No not possible |
| Memory requirements | >512MB |
| Typical run time | 5 min to 50 days |
| Input - Output description | |
|---|---|
| Describe input parameters | DEM as ascii grid (output from arcGIS),
Rainfall data as a space separated ascii file (straightforward list), Inputs of water/sediment in an ascii file. Other single value parameter inputs for grainsize, flow parameters, slope processes etc.. |
| Input format | ASCII |
| Other input format | |
| Describe output parameters | ascii grids (readable into arcGIS) and google earth images of: DEM, flow depth, surface grainsize, shear stress, vegetation cover, velocity.
Also time series of water discharge and sediment discharge (across 9 grainsizes) at user chosen interval. Also visual output to AVI file. |
| 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? | No |
| If above answer is yes | ESRI |
| Other visualization software | but you can use ESRI (ArcGIS) |
| Process description model | |
|---|---|
| Describe processes represented by the model | 2d multiple flow direction steady state flow model
Erosion and deposition over 9 separate grainsizes Bedload and suspended load sediment transport Slope processes (creep, enhanced creep and mass movement) Vegetation growth Aeolian transport (under development - slab dune model) |
| Describe key physical parameters and equations | Flow depths calculated using version of mannings implemented across a cellular grid using a scanning algorithm.
Sediment tranport using either Einstein or Wilcock and Crowe functions Slope model using simple slab failure and psuedo USLE implementation Dune model adaption of DECAL and Werner slab model |
| Describe length scale and resolution constraints | Has been applied to catchments ranging from 1km^2 to 500km^2, at grid resolutions ranging from 1m to 50m. |
| Describe time scale and resolution constraints | The model has simulated periods from 1 day to 9000 years.
The length of run is largely contingent on the number of grid cells, thus a balance between resoltion and area of study. A small catchment with a coarse resolution will run very fast. Increase the area or make grid cells smaller and run times will increase. |
| Describe any numerical limitations and issues | Run times can be long (60 +days for large areas over many 100's of years).
Flow model is steady state |
| Model testing | |
|---|---|
| Describe available calibration data sets | Tested on several catchments in UK over long and short time scales. |
| Upload calibration data sets if available: | |
| Describe available test data sets | none yet; in development |
| Upload test data sets if available: | |
| Describe ideal data for testing | Flow and sediment discharge data, images of topographic change |
| Users groups model | |
|---|---|
| Do you have current or future plans for collaborating with other researchers? | Yes, I am happy to collaborate with any potential users. There is a long history of CAESAR being take up by others including researchers in Italy, France, Spain, NZ, Australia, USA. |
| Documentation model | |
|---|---|
| Provide key papers on model if any | Van De Wiel, M.J., Coulthard, T.J., Macklin, M.G., Lewin, J. (2007) Embedding reach-scale fluvial dynamics within the CAESAR cellular automaton landscape evolution model. Geomorphology, 90 (3-4), pp. 283-301.
Coulthard, T. J. Macklin, M. G. & Kirkby, M. J. (2002) Simulating upland river catchment and alluvial fan evolution. Earth Surface Processes and Landforms. 27, 269-288. |
| Is there a manual available? | Yes |
| Upload manual if available: | |
| Model website if any | http://www.coulthard.org.uk |
| Model forum / discussion board | |
| Additional comments | |
|---|---|
| Comments | |
