SORTIE-ND
Software for spatially-explicit simulation of forest dynamics

The linear diameter-height relationship

The linear diameter-height relationship is the same for all life history stages, but each stage can use a different set of parameter values.

Parameters

Parameter nameDescription
Maximum Tree Height, in metersThe maximum tree height for a species, in meters. No tree, no matter what allometric function it uses, is allowed to get taller than this. Used by all species.
Adult Linear Function InterceptThe intercept of the adult linear function for DBH and height.
Adult Linear Function SlopeThe slope of the adult linear function for DBH and height.
Sapling Linear Function InterceptThe intercept of the sapling linear function for DBH and height.
Sapling Linear Function SlopeThe intercept of the sapling linear function for DBH and height.
Seedling Linear Function InterceptThe intercept of the seedling linear function for DBH and height.
Seedling Linear Function SlopeThe slope of the seedling linear function for DBH and height.

The linear diam - height function is:

height = a + b * diam

where:

  • height is tree height, in m
  • a is the appropriate linear intercept parameter (either Adult Linear Function Intercept, Sapling Linear Function Intercept, or Seedling Linear Function Intercept)
  • b is the appropriate linear slope parameter (either Adult Linear Function Slope, Sapling Linear Function Slope, or Seedling Linear Function Slope)
  • diam is DBH (in cm) for saplings and adults, or diam10 (in cm) for seedlings