Norway spruce bark thickness models based on log midspan diameter for use in mechanized forest harvesting in Czechia

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F19%3A80613" target="_blank" >RIV/60460709:41320/19:80613 - isvavai.cz</a>
Alternative codes found
RIV/60461373:22340/19:43918187
Result on the web
<a href="https://www.tandfonline.com/doi/full/10.1080/02827581.2019.1650952" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/02827581.2019.1650952</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/02827581.2019.1650952" target="_blank" >10.1080/02827581.2019.1650952</a>

Result language
angličtina
Original language name
Norway spruce bark thickness models based on log midspan diameter for use in mechanized forest harvesting in Czechia
Original language description
Foresters need to estimate bark thickness accurately in order to know the merchantable timber volume. Therefore, we developed a precise model for double bark thickness estimation that can be used with harvesters. We fitted a line to data from the Czech standard for bark deductions of Norway spruce (Picea abies (L.) Karst.) based on over-bark midspan diameters. Our model provided smaller deviations from the currently used polynomial model than other methods of bark thickness estimation. Only the diameter class method provided similar results. The mean absolute error (MAE) of the double bark thickness was 0,37 mm for our model or 0,48 mm for the diameter class method. The root means square error (RMSE) in this dataset was 0,43 mm or 0,56 mm respectively. We tested the deviations from the polynomial model on data from 22,442 spruce logs, gathered during forest harvesting in Czechia. Our model provided MAE of 0,34 mm and RMSE of 0,40 mm. Diameter class method provided MAE of 0,38 mm and RMSE of 0,43 mm.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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