This behavior increments growth as a function of DBH and neighboring basal area, and incorporates a lag period after harvesting during which trees acclimate to their post-harvest growing conditions.
Parameter name | Description |
---|---|
Post Harvest Growth - DBH Growth Effect | The effect of DBH on growth. |
Post Harvest Growth - DBH NCI Effect | The effect of DBH on the neighborhood competition index. |
Post Harvest Growth - Max Growth Constant | Maximum annual radial growth, in mm. |
Post Harvest Growth - NCI Constant | A constant adjusting the effects of NCI. |
Post Harvest Growth - NCI Distance (m) | The maximum distance at which neighboring trees can have competitive effects. |
Post Harvest Growth - Time Since Harvest Rate Param | A parameter controlling the rate at which the actual growth approaches the potential growth after a harvest. |
A tree's potential growth is calculated by:
where:
If no harvest has occurred yet in this run, then the tree's actual growth, ARG, equals PARG. If a harvest has occurred at some point during this run, then ARG is calculated by:
where:
Annual radial growth ARG is used to calculate timestep diameter growth using
where t is the number of years per timestep.
Model forms are based on those in Thorpe et al. 2010.
This behavior can be applied to saplings and adults of any species.