Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous Forest

Mohammad R Ghaffariyan; Ramin Naghdi; Ismael Ghajar; Mehrdad Nikooy

doi:10.1007/s11842-012-9204-4

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Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous Forest

Journal article

Peer reviewed

Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous Forest

Mohammad R Ghaffariyan, Ramin Naghdi, Ismael Ghajar and Mehrdad Nikooy

Small-scale Forestry, Vol.12(2), pp.181-192

2013

DOI: https://doi.org/10.1007/s11842-012-9204-4

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Abstract

Forestry Sciences

Applied Economics

Policy and Administration

Iran

time study

productivity

felling

bucking

skidding

transport

unloading

Time equations are derived for felling with chainsaw, skidding with cable wheeled skidder, loading with grapple hydraulic loader and trucking of logs within a cut-to-length harvesting method. The continuous time study method was applied to collect data for felling, skidding, loading and a transportation model. Multiple regression analysis via SPSS software was applied to develop the time models. Felling time was found to be highly dependent on diameter at breast height. Skidding distance, winching distance, slope of the trail and piece volume were significant variables for the skidding time prediction model. The loading time model was developed considering piece volume. Transportation distance and load volume were used as independent variables in modeling the transportation time. The net production of felling was estimated at 12 trees/h (56.65 m3/h). The net production rates for skidding, loading and traveling averaged 18.51, 41.90 and 3.32 m3/h respectively. The total cost of harvesting from stand to mill was estimated 19.70 â‚¬/m3. The skidding phase was the most expensive component of the cut-to-length method. The bucking and delimbing components were less costly than the other logging phases. The results of this study can be used for harvesting planning and productivity optimization.

Details

Title: Time Prediction Models and Cost Evaluation of Cut-To-Length (CTL) Harvesting Method in a Mountainous Forest
Authors: Mohammad R Ghaffariyan (Author) - University of Tasmania
Ramin Naghdi (Author) - University of Guilan, Iran
Ismael Ghajar (Author) - Tarbiat Modares University, Iran
Mehrdad Nikooy (Author) - University of Guilan, Iran
Publication details: Small-scale Forestry, Vol.12(2), pp.181-192
Publisher: Springer Netherlands
Date published: 2013
DOI: 10.1007/s11842-012-9204-4
ISSN: 1873-7617
Organisation Unit: University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
Language: English
Record Identifier: 99450068002621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Forestry

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