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    Author(s): R.J. McGaughey; R.H. Twito
    Date: 1987
    Source: Gen. Tech. Rep. PNW-GTR-205. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 28 p
    Publication Series: General Technical Report (GTR)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (2.01 MB)

    Description

    A skyline-logging simulation model designed to help planners evaluate potential yarding options and alternative harvest plans is presented. The model, called SIMYAR, uses information about the timber stand, yarding equipment, and unit geometry to estimate yarding co stand productivity for a particular operation. The costs of felling, bucking, loading, and hauling are not considered. Included are a description of the input requirements for SIMYAR, descriptions of the major algorithms, suggested applications, and a discussion of limitations. A users guide is available as an appendix to this publication.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    McGaughey, R.J.; Twito, R.H. 1987. SIMYAR: a cable-yarding simulation model. Gen. Tech. Rep. PNW-GTR-205. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 28 p

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    Keywords

    Simulation, cable logging, yarding operations, timber harvesting, costs (logging)

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