Methods of remote measurement and modeling of stem profiles to evatuate their assortment and quality structure
Journal Title: Лісівництво і агролісомеліорація - Year 2014, Vol 124, Issue
Abstract
The usage of programming software Field-Map to establish commodity and assortment-quality structure on cutting areas without logging model trees is discussed. Mathematical model forming the trunk is calculated on the base of distance measuring diameter. Building generatrix of stem trunk conducted using non-linear regression equation by assessing the unknown parameters (i, p, q) model. Based on the actual shape of the stem, this feature describes the lower, middle and upper parts of the longitudinal profile of a tree based on the differential equation. Alignment was performed using the Riemer-Gadow-Sloboda, where the parameters i, p, q calculated by the formulas. The value of assortment volumes calculated using tables of State Standard GOST 2708-75, the formula of finite cross section and software Field-Map Stem Analyst. The difference observed in the calculation of the assortment volumes is due to the peculiarities of form at the bottom part of the stem. In bottom part of the stem the volume set using tables of State Standard GOST 2708-75 is usually underestimate, while using the formula of finite cross section gives somewhat overestimate results. In the middle part of the stem the deviation in assortment volumes is small. Application of programming software Field-Map is feasible and promising for the assessment of forest resources in oak stands, since it allows to define assortment-quality stand structure without cutting of model trees and perform calculations considering different scenarios of assortment for consumer demands for wood. In further research it is necessary to determine the features of assortment-quality structure of oak stands taking into account possible hidden defects of stems. Calculations of volume assortments using the tables of State Standard GOST 2708-75, the formula of finite cross section, and generatrix of stem showed that the total difference in assortments’ volume determined by different methods is about 1%.
Authors and Affiliations
O. Slysh, V. Solodovnik, M. Buksha
Keywords
Related Articles
- EP ID EP180764
- DOI -
- Views 126
- Downloads 0
Methodical principles of the use of rent conception for economic evaluation of forest resources
The paper dwells on problem questions and methodical approaches to economic assessment of forest resources by rental concept. The main methodical approaches to an economic assessment of natural resources are analysed and...
The mitotic activity of meristems of vegetative bud cells of English oak (Quercus robur L.)
The improved methodology of studing of apical meristems of vegetative buds of English oak (Quercus robur L.) with application of the squash preparations stained by hematoxylin is given. Advantages of this technique are t...
Features of advance regeneration of economically valuable species under the canopy of natural oak stands in fresh and moist maple-lime fairly fertile oak forest type in the Left-bank Forest-Steppe part of the Sumy region
Natural stands of pedunculate oak (Quercus robur L.) in the Left-bank Forest-Steppe of Ukraine in the fairly fertile oak forest types grows on large areas (over 27 thousand hectares). In these conditions, mixed natural o...
Foliage browsing insects of Chihirin pine forest
In 2012–2013, 10 foliage browsing insect species were found in forest stands of Chihirin pine forest. Biological peculiarities were specified for the species, which can be injurious for region. These species are Lepidopt...
Silver birch (Betula pendula Roth) in the forests of the Left-bank Forest Steppe of Ukraine
The area of birch stands in the forest resources of forest enterprises, which are entirely located in the Left-bank Forest Steppe, amounts from 86.1 hectares (the State Enterprise "Chuguevo-Babchanske Forestry") to 554.3...