Don, I am interested, but at the moment doubt I can do anything with it.
How to deal with overlapping crowns - I envision the general model mostly being used on larger trees with good crown exclusion. Since it is based on a couple of simple measurements and a shape recognition, it should not be that hard to apply. I don't see it as the end all of crown volume measurements as certainly more detailed analysis could be done with an individual tree. It is meant as one of the basic measurements. Crowns do overlap and intersperse, I would think that the volume of each would include the entire canopy even if it partially overlaps that of an adjacent tree. The crown shapes are not always ideal in the field, this is meant as a framework that would need to be adjusted as needed to meet the situation. I included the values for idealized forms of cone, sphere, and cylinder as well as the ranges for various tree shapes. Most of the crown shapes should fall within those parameters, and if they don't measurements could be made based upon a photo or drawing, and if that did not work, there is always the option of climbing the tree to get better data, Ed ----- Original Message ----- From: DON BERTOLETTE To: [email protected] Sent: Friday, February 27, 2009 4:12 PM Subject: [ENTS] Re: Crown Volme Estimates 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 ----- Original Message ----- From: DON BERTOLETTE To: [email protected] Sent: Friday, February 27, 2009 4:43 PM Subject: [ENTS] Re: Missouri Old Growth? Ed- An interesting exercise! One thought occurred as I perused your images...while some species will 'fend off' interstitial branch conflicts between adjacent trees, some 'interlap', or 'invade' adjacent tree's space. How do you view this (additive, subtractive?)? -Don --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
