Rut Depth Evaluation of a Triple-Bogie System for Forwarders—Field Trials with TLS Data Support

Michael Starke, Cédric Derron, Felix Heubaum and Martin Ziesak
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Michael Starke: School of Agricultural, Forest and Food Sciences (HAFL), Bern University of Applied Sciences, 3052 Zollikofen, Switzerland
Cédric Derron: School of Agricultural, Forest and Food Sciences (HAFL), Bern University of Applied Sciences, 3052 Zollikofen, Switzerland
Felix Heubaum: Staatsbetrieb Sachsenforst, Maschinenstation Königstein, 01824 Königstein, Germany
Martin Ziesak: School of Agricultural, Forest and Food Sciences (HAFL), Bern University of Applied Sciences, 3052 Zollikofen, Switzerland

Sustainability, 2020, vol. 12, issue 16, 1-16

Abstract: In 2019, the machine manufacturer HSM presented a forwarder prototype for timber hauling in cut-to-length processes fitted with a new 10-wheel triple-bogie (TB) setup approach aimed at promoting sustainable forest management by reducing the ecological impact of forest operations, especially under soft-soil working conditions. The purpose of our study was to assess the resulting soil-protection effect emerging from additional wheel-contact surface area. For this, the rut development under known cumulative weight, related to the soil conditions of shear strength and moisture content, was recorded for later comparison. Additional terrestrial laser scanning (TLS) was used to generate a multi-temporal digital terrain model (DTM) in order to enhance the data sample, assess data quality, and facilitate visualization of the impact of local disturbance factors. In all TB configurations, a rut depth of 10 cm (5.8–7.2 cm) was not exceeded after the hauling of a reference amount of 90 m 3 of timber (average soil shear strength reference of 67 kPa, volumetric water content (VMC) 43%). Compared to a reference dataset, all observed configurations ranked in the lowest-impact machine categories on related soil stability classes, and the configuration without bogie tracks revealed the highest machine weight to weight distribution trade-off potential.

Keywords: forest operation; forwarder; cut-to-length; soft soil; soil protection; rut depth; TLS data (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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