Model:Kirwan marsh model

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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 Spatial dimensions Spatial extent Model domain Coastal 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. Keywords: coastal morphdynamics, salt Marsh - tidal Flat evolution, 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 United States Email address mkirwan@usgs.gov Phone Fax Supported platforms Linux 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 2003 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 Source code availability (Or provide future intension) Source web address Source csdms web address Program license type GPL v2 Program license type other Memory requirements -- Typical run time hour to days 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 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 -- 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. Do you have current or future plans for collaborating with other researchers? Yes Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments -- 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 Authors Matthew Kirwan Source code Model citations Citation indices Kirwan marsh model Nr. of pubs: -- Citations: 0 h-index: --"--" is not a number. QR-code Link to this page Other models by author Kirwan marsh model TreeThrow

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