A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey

In Turkey ground base skidding method is frequently used to extract log material. Physical damages occurring on the skidded log during ground based skidding cause quality and quantity loss of the log. This damage is formed by the ground structure, mass of transported logs, friction coefficient and s...

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Main Authors: H. Hulusi Acar, Saliha Unver
Format: Article
Language:English
Published: University of Zagreb, Faculty of Forestry 2009-01-01
Series:Croatian Journal of Forest Engineering
Online Access:https://hrcak.srce.hr/file/62223
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spelling doaj-6c68eb0e52cf4ca88044ead454fb3eff2020-11-25T01:27:32ZengUniversity of Zagreb, Faculty of ForestryCroatian Journal of Forest Engineering1845-57191848-96722009-01-01301596539650A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern TurkeyH. Hulusi Acar0Saliha Unver1Karadeniz Technical University, Faculty of Forestry, Department of Forest Engineering, Trabzon, TurkeyKaradeniz Technical University, Faculty of Forestry, Department of Forest Engineering, Trabzon, TurkeyIn Turkey ground base skidding method is frequently used to extract log material. Physical damages occurring on the skidded log during ground based skidding cause quality and quantity loss of the log. This damage is formed by the ground structure, mass of transported logs, friction coefficient and skidding distance. In this study to improve a »Damage Prediction Model« means to predict the quantity loss that can occur as a result of ground skidding on steep areas. Spruce forests in Maçka, Trabzon, Eastern Blacksea, was selected as the study area. The slope of study area ranged between 45% and 80%. In this context, a total of 318 logs were researched. These logs were skidded in 6 harvested areas where skidding is done both in summer and winter. It was determined during research that the types of damage causing quantity loss are breakage and wood wearing out. In the meantime, the quantity loss occurring as a result of breakage and wood wearing out was calculated as volume.Aprediction model was developed by taking into consideration friction vector affecting skidded log, friction surface area of the log and skidding distance parameters. The model was developed based on data related to logs skidded in summer and winter. Damage prediction model coefficients were obtained for two production seasons by solving models according to the least squares method. Statistical significance of coefficients was done and damage prediction models were obtained with significant coefficients for summer and winter production seasons. This enabled producers to predict the quantity loss before skidding and to take necessary precautions.https://hrcak.srce.hr/file/62223
collection DOAJ
language English
format Article
sources DOAJ
author H. Hulusi Acar
Saliha Unver
spellingShingle H. Hulusi Acar
Saliha Unver
A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
Croatian Journal of Forest Engineering
author_facet H. Hulusi Acar
Saliha Unver
author_sort H. Hulusi Acar
title A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
title_short A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
title_full A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
title_fullStr A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
title_full_unstemmed A Damage Prediction Model for Quantity Loss of Skidded Spruce Logs during Ground Base Skidding in North Eastern Turkey
title_sort damage prediction model for quantity loss of skidded spruce logs during ground base skidding in north eastern turkey
publisher University of Zagreb, Faculty of Forestry
series Croatian Journal of Forest Engineering
issn 1845-5719
1848-9672
publishDate 2009-01-01
description In Turkey ground base skidding method is frequently used to extract log material. Physical damages occurring on the skidded log during ground based skidding cause quality and quantity loss of the log. This damage is formed by the ground structure, mass of transported logs, friction coefficient and skidding distance. In this study to improve a »Damage Prediction Model« means to predict the quantity loss that can occur as a result of ground skidding on steep areas. Spruce forests in Maçka, Trabzon, Eastern Blacksea, was selected as the study area. The slope of study area ranged between 45% and 80%. In this context, a total of 318 logs were researched. These logs were skidded in 6 harvested areas where skidding is done both in summer and winter. It was determined during research that the types of damage causing quantity loss are breakage and wood wearing out. In the meantime, the quantity loss occurring as a result of breakage and wood wearing out was calculated as volume.Aprediction model was developed by taking into consideration friction vector affecting skidded log, friction surface area of the log and skidding distance parameters. The model was developed based on data related to logs skidded in summer and winter. Damage prediction model coefficients were obtained for two production seasons by solving models according to the least squares method. Statistical significance of coefficients was done and damage prediction models were obtained with significant coefficients for summer and winter production seasons. This enabled producers to predict the quantity loss before skidding and to take necessary precautions.
url https://hrcak.srce.hr/file/62223
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