Also known as
Model type Single
Model part of larger framework
Note on status model
Date note status model
Spatial dimensions
Spatial extent
Model domain Terrestrial
One-line model description Sediment transport by tree throw on hillslopes
Extended model description Plot scale, spatially implicit model of tree throw on hillslopes. We couple an existing forest growth model with a couple simple equations for the transport of sediment caused by tree fall.

tree throw, sediment transport,

Name Matthew Kirwan
Type of contact Model developer
Institute / Organization USGS, University of Virginia
Postal address 1 Dept. of Environmental Sciences
Postal address 2 PO Box 400123
Town / City Charlottesville
Postal code 22904
State Virginia
Country United States
Email address
Phone 434-924-3186

Name Hank Shugart
Type of contact Model developer
Institute / Organization
Postal address 1
Postal address 2
Town / City
Postal code
Email address

Supported platforms
Unix, Linux, 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 2008
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 Seconds to minutes

Describe input parameters fraction of trees that move sediment when they die, # of plots to simulate, # of years to simulate, with or without growth of Chestnut.
Input format ASCII
Other input format Command line
Describe output parameters Characteristics of tree growth (stand biomass, stem count, leaf area, diamter) and characteristics of sediment transport (sediment flux in m4/m/yr, # of tree falls)
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
Other visualization software

Describe processes represented by the model Growth, death, and regeneration of individual trees. Sediment flux moved by each tree.
Describe key physical parameters and equations Species specific, logistic growth equation for individual trees.

Sediment flux for each tree fall a function of sediment volume, transport distance, and hillslope angle. Sediment volume and transport distance a function of tree diamter.

Describe length scale and resolution constraints Zero dimensional model simulating a 1/12 ha plot.
Describe time scale and resolution constraints Annual time step, usually simulate ~1000 years.
Describe any numerical limitations and issues --

Describe available calibration data sets Requires calibration for relationship between:
  1. soil plate volume and tree diameter;
  2. soil plate width and tree diameter;
  3. soil plate depth and tree diameter.

These relationships have been calibrated based on field data in the Southern Blue Ridge (Appalachian Mountains).

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? no, but would like to
Is there a manual available? No
Upload manual if available:
Model website if any None
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
Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
m-quotient: 0
Qrcode TreeThrow.png
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Nr. of publications: --
Total citations: 0
h-index: --"--" is not a number.
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Input Files

Output Files