Growth - structural

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FORGEM

Structural features simulated by the ForGEM model are stem volume, tree height, stem diameter, crown diameter and crown length. Empirical equations are used for volume, diameter, and height. The coefficients of these equations are indicated as , with a numeric identifier. See structural growth parameters for the values of for different tree species.


stem volume


With:

V: volume (m3 tree-1)
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allocation of NPP to stem
: wood density
NPP: primary production (kg tree-1 d-1)


height


with:

H: tree height (m)
t: tree age (yr)

stem diameter


with:

V: volume (dm3 stem-1)
D: stem diameter at breast height (cm)
H: tree height (m)
e: exponent of the natural logarithm.

crown diameter

crown length

references

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