This calculates crown dimensions as a function of tree size and local crowding. The equations are the same for crown depth and crown radius, but they each have separate parameters.
Parameter name | Description |
---|---|
NCI Crown Depth - Alpha | NCI function exponent. |
NCI Crown Depth - Beta | NCI function exponent. |
NCI Crown Depth - Crowding Effect "n" | Crowding effect exponent. |
NCI Crown Depth - Gamma | NCI function exponent. |
NCI Crown Depth Lambda for Species X Neighbors | The competitive effect of neighbors of species X. |
NCI Crown Depth - Max Potential Depth (m) | The maximum possible value for crown depth, in m. |
NCI Crown Depth - Max Search Distance for Neighbors (m) | The maximum distance, in m, at which a neighboring tree has competitive effects on a target tree. |
NCI Crown Depth - Minimum Neighbor DBH (cm) | The minimum DBH for trees of that species to compete as neighbors. Values are needed for all species. |
NCI Crown Depth - Size Effect "d" | Size effect function exponent. |
Parameter name | Description |
---|---|
NCI Crown Radius - Alpha | NCI function exponent. |
NCI Crown Radius - Beta | NCI function exponent. |
NCI Crown Radius - Crowding Effect "n" | Crowding effect exponent. |
NCI Crown Radius - Gamma | NCI function exponent. |
NCI Crown Radius Lambda for Species X Neighbors | The competitive effect of neighbors of species X. |
NCI Crown Radius - Max Potential Radius (m) | The maximum possible value for crown radius, in m. |
NCI Crown Radius - Max Search Distance for Neighbors (m) | The maximum distance, in m, at which a neighboring tree has competitive effects on a target tree. |
NCI Crown Radius - Minimum Neighbor DBH (cm) | The minimum DBH for trees of that species to compete as neighbors. Values are needed for all species. |
NCI Crown Radius - Size Effect "d" | Size effect function exponent. |
The crown dimensions are calculated as:
where:
Size Effect is calculated as:
where:
Crowding Effect is calculated as:
where:
NCI is calculated as:
where: