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Type of publication: conference paper
Type of publication (PDB): Tezės kituose recenzuojamuose leidiniuose / Theses in other peer-reviewed publications (T1e)
Field of Science: Miškotyra / Forestry (A004)
Author(s): Kuliešis, Andrius;Kulbokas, Gintaras;Kasperavičius, Albertas;Kuliešis, Andrius A
Title: Investigation of tree height estimation accuracy during 1998-2010 NFI of Lithuania
Is part of: The Nordic-Baltic Co-operation group for Forest Inventory EFINORD - SNS network meeting and scientific conference : August 21-23, 2013 Institute of Forest Management and Wood Science, Faculty of Forest and Ecology, Aleksandras Stulginskis University, Kaunas reg.,Lithuania : abstracts and brief profiles of participants. Akademija ( Kauno r.) : ASU leidybos centras, 2013
Extent: p. 19- 20
Date: 2013
Abstract: Height estimation of every tree, measured on NFI sample plots is based on diameter- height measurements of small size sample trees. Height is measured for every seventh tree on sample plot (Kuliešis et.all, 2003, 2009). Heights and diameters of 3-5 trees of prevailing and 1-3 trees of other, admixture species, are measured in average per plot. Heights of the rest trees are estimated using generalized height- diameter model (Kuliešis, 1993) and data of measured diameters of all trees as well as height-diameter of sample trees. The goal of this study is to estimate accuracy of tree height estimations, using generalized height- diameter model and height-diameter measurements of small size sample trees. Data for this study were used from diameter-height measurements of 47.5 thousands sample trees of prevailing eight tree species – pine, spruce, birch, aspen, black alder, grey alder, oak, ash and 24.6 thousands sample trees of the same tree species, as admixture in stands, on 1998-2010 NFI plots. Deviations of modeled heights from measured and their significance were estimated depending on tree species, tree position - prevailing or admixture, mean diameter and mean height of the trees for all trees and separately for thinner and thicker to compare with the mean stand diameter of trees. The heights of the trees in spruce and oak stands are characterized by the most and in black alder and aspen stands – by the least variation per cell with the range of mean diameter ± 2 cm and range of mean height ± 1 m
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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