Pacific Northwest Research Station

Title: SIMYAR: a cable-yarding simulation model.

Author: McGaughey, R.J.; Twito, R.H.

Date: 1987

Source: Gen. Tech. Rep. PNW-GTR-205. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 28 p

Station ID: GTR-PNW-205

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.

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

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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