Ed- In addition to the largely theoretical crown volume estimates listed here (suprisingly discreet numerical values!), there have been some somewhat more empirical studies done on crown bulk density, in a field I was more familiar with a few years back...one of the inputs required to accurately model fire area. My recall is that it was more oriented to coniferous, western species. I could dig up some references if anyone is interested. -Don
From: [email protected] To: [email protected] Subject: [ENTS] Crown Volme Estimates Date: Fri, 27 Feb 2009 13:43:49 -0500 ENTS The attached .pdf file presents a simplified method for accurately estimating the crown volumes of trees using a limited number of measurements. The thickness of the crown and the average crown spread will be measured and the general Crown form factor (Cf) of a tree will determined by visual comparison with a chart. The volume of the crown will then be calculated by the formula: Crown volume = (Cf) x (crown thickness) x (average maximum crown spread)2 Different trees have different general crown shapes. These tend to range from roughly conical, to spherical, to cylindrical. It is a reasonable assumption that trees with these differing crown shapes, even if of similar overall crown thickness and spread would have different volumes, and that these volumes would progressively vary as the overall crown shape varied from one form to another. Edward Frank _________________________________________________________________ Windows Live™ Hotmail®:…more than just e-mail. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_hm_justgotbetter_explore_022009 --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org Send email to [email protected] Visit this group at http://groups.google.com/group/entstrees?hl=en -~----------~----~----~----~------~----~------~--~---
