Crown Shape Factors & Volumes

<br /><br /> Many of the models for determining loads and forces in tree structural systems depend upon crown shape. Tree crown shapes are integral to a variety of models because volume estimates, surface area estimates, or various types of two dimensional crown projections are directly related to crown shape. Calculating crown shape in a natural setting under dynamic loads requires continuous changes (over a variety of time and spacial scales) with growth, damage, and applied forces.&nbsp; Because of varying tree crown shape, reach, extent, and internal positioning of branches and leaf tissues (crown density impacts), mechanic loads and structural resistances are difficult to calculate.<br /><br /> Most models published have consolidated all the variation in tree crowns by using calculations for solid geometric objects. Using formulae which represent geometric solids or surfaces help simplify mechanical models. Choice of an appropriate solid object formula to represent tree crown shape remains subject to much debate depending upon tree species, biometric attributes of trees and models involved, and discretion of the researcher.<br /><br /> Tree Biomechanics Series<br /><br /> FOR00-032<br /><br />

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