Double Bark Thickness Estimation Models of Common European Broadleaved Species for Harvester Timber Volume Estimation in Czechia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F23%3A96987" target="_blank" >RIV/60460709:41320/23:96987 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5552/crojfe.2023.1641" target="_blank" >http://dx.doi.org/10.5552/crojfe.2023.1641</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5552/crojfe.2023.1641" target="_blank" >10.5552/crojfe.2023.1641</a>

Result language

angličtina

Original language name

Double Bark Thickness Estimation Models of Common European Broadleaved Species for Harvester Timber Volume Estimation in Czechia

Original language description

The share of the annual volume of harvester-produced timber in Czech forest bioeconomy has increased in the last decades. To estimate under-bark timber volume, harvester systems allow choosing between two different bark deduction models - diameter band (DBM) and linear model. However, linear models were not calibrated for the conditions of Czech forestry. There-fore, the objective of this research was to develop, for local conditions in Czechia, linear func-tions for estimating the double bark thickness of two groups of broadleaved species (beech and oak) and to test their viability based on real harvest data. To create the linear functions, official Czech cubing tables were used. Data from real harvests were gathered from fifteen harvesters. A sample containing 4995 logs belonging to the beech group was analyzed using descriptive statistics and the Paired Wilcoxon tests. The mean double bark thickness for beech group was 15.1 mm (polynomial and linear model). For oak group, it was 15.48 mm (polynomial) or 15.49 mm (linear). The results of real harvests for beech group revealed that the mean double bark thickness estimated by the polynomial function was 7.08 mm. The linear function esti-mates were closer to the value estimated by the polynomial (6.84 mm) than DBM estimates (6.68 mm). Therefore, we can state that the newly developed linear models can be used in fully mechanized harvesting instead of manual bark deduction methods in Czechia.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Croatian Journal of Forest Engineering

ISSN

1845-5719

e-ISSN

1845-5719

Volume of the periodical

44

Issue of the periodical within the volume

1

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

95-102

UT code for WoS article

000992507300006

EID of the result in the Scopus database

2-s2.0-85146325597