From csdms
[edit] Kirwan marsh model
Contents |
[edit] Metadata
| Modeler information | |
|---|---|
| First name | Matthew |
| Last name | Kirwan |
| Type of contact | Model developer |
| Institute / Organization | University of Virginia |
| Postal address 1 | PO Box 400123 |
| Postal address 2 | |
| Town / City | Charlottesville |
| Postal code | 22904 |
| State | Virginia |
| Country | USA |
| Email address | mkirwan@usgs.gov |
| Phone | |
| Fax | |
| Model identity | |
|---|---|
| Model type | Single |
| Spatial dimensions | |
| Spatial extent | |
| Model domain | |
| One-line model description | Ecomorphoydamic model of marsh elevation and channel evolution |
| Extended model description | Spatially explicit model of the development and evolution of salt marshes, including vegetation influenced accretion and hydrodynamic determined channel erosion. |
| Model technical information | |
|---|---|
| Supported platforms | Linux |
| Other platform | |
| Programming language | C |
| Other program language | |
| Code optimized | Single Processor |
| Start year development | 2003 |
| Does model development still take place? | Yes |
| If above answer is no, provide end year model development | |
| Model availability | |
| Source code availability (Or provide future intension) | Through owner |
| Source web address | |
| Program license type | GPL v2 |
| Program license type other | |
| OpenMI compliant | No but possible |
| CCA component | No but possible |
| IRF interface | No but possible |
| Memory requirements | -- |
| Typical run time | hour to days |
| Input - Output description | |
|---|---|
| Describe input parameters | Does not require any input data, but if desired, model can run from files describing sea level and/or the elevations of an existing marsh. |
| Input format | ASCII |
| Other input format | |
| Describe output parameters | Elevation, Biomass, Accretion Rate, Erosion Rate, and other characteristics of every cell in domain. Also outputs spatially averaged statistics. |
| 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 | |
| Process description model | |
|---|---|
| Describe processes represented by the model | The model calculates changes in elevation and vegetation growth for a hypothetical salt marsh. In each cell, elevation change is calculated as the difference between accretion and erosion. Accretion rates are a function of inundation depth, vegetation growth, and suspended sediment concentration. Water routed according to Rinaldo et al. (1999) scheme. Erosion rates calculated according to excess sheer stress. Channels widen according to a diffusion-like routine where downslope transport is inversely proportional to vegetation. Vegetation grows according to Morris et al. (2002) where biomass is proportional to inundation depth up until an optimum depth. Episodic vegetation disturbance is simulated by removing vegetation from randomly selected cells (Kirwan et al., 2008). Another version of the model treats wave erosion in a simplistic manner (Kirwan and Murray, 2008). |
| Describe key physical parameters and equations | Key parameters include the rate of sea level rise, suspended sediment concentration, tidal range (which controls vegetation distribution), critical shear stress for sediment erosion, and the period of time that erosion takes place during each tidal cycle. Parameters controlling the growth pattern of vegetation can easily be modified. |
| Describe length scale and resolution constraints | Domain size is 3 km by 3 km, grid cell is 5 m by 5m. |
| Describe time scale and resolution constraints | The model explicitly runs on an individual tidal cycle time step, which we scale up to 2 months. But, results most meaningful at timescales greater than a couple years. |
| Describe any numerical limitations and issues | -- |
| Model testing | |
|---|---|
| Describe available calibration data sets | Biomass productivity and marsh accretion rates from 1984-present, described in Morris et al. (2002). |
| Upload calibration data sets if available: | |
| Describe available test data sets | A couple high resolution Pb210 curves that span ~100 years are currently being constructed and used to test model. |
| Upload test data sets if available: | |
| Describe ideal data for testing | Long term, high resolution (annual to couple years) datasets of marsh accretion. Similar time series of channel characteristics would be useful. |
| Users groups model | |
|---|---|
| Do you have current or future plans for collaborating with other researchers? | Yes |
| Documentation model | |
|---|---|
| Provide key papers on model if any | Papers:
|
| Is there a manual available? | No |
| Upload manual if available: | |
| Model website if any | |
| Model forum / discussion board | |
| Additional comments | |
|---|---|
| Comments | -- |
