Treesearch

A simple transformation of the linear programing model used in land use planning to a goal programing model allows the multiple goals implied by multiple use management to be explicitly recognized. This report outlines the procedure for accomplishing the transformation and discusses problems with use of goal programing. Of particular concern are the expert opinions often required to set up the programing matrix, the need for quantitative goals, the choice of relative weights for the goals, and the lack of explicit trade-offs. The relationships of goal programing to linear programing and...

In forest areas where high soil erosion potential exists, a comparative yarding cost estimate, including the indirect costs determined by methods proposed here, shows that the total cost of using "advanced" logging methods may be less than that of "traditional" systems.

Describes a computer simulation model for evaluating logging residue handling systems. The flow of resources is traced through a prespecified combination of operations including yarding, chipping, sorting, loading, transporting, and unloading. The model was used to evaluate the feasibility of converting logging residues to chips that could be used, for example, to generate electrical power. Empirical results obtained for two processing schemes are reported.

The use of goal programing for selecting forest residue treatment alternatives within a multiple goal framework is described. The basic features of goal programing are reviewed and illustrated with a hypothetical problem involving the selection of residue treatments for 10 cutting units. Twelve residue-regeneration treatment combinations are evaluated by using physical, economic, and environmental goals. Empirical results are reported for four different goal priority sets. An interpretation of the sensitivity of the optimal treatment schedule associated with each priority set is also...

Large organic debris has historically been an important element in small mountain streams of the Pacific Northwest. The debris serves to slow the movement of water and inorganic and fine organic matter through the channel. Debris may remain in the channel for decades or longer, and tends to stabilize some sections of a streambed and stream banks while destabilizing other areas. The combination of clear cutting and the complete removal of large debris in a channel may deprive a stream of this natural feature of streams for a century or longer. The consequences are likely to be downcutting...

This report presents the findings of a 100-percent canvas of the primary forest products industry in Oregon for 1976. Tabular presentation includes characteristics of the industry log consumption and disposition of mill residues. Accompanying the tables is a descriptive analysis of conditions and trends in the industry.

Discusses the results of a 1965 forest inventory of 449,300 acres in the Haines-Skagway area. Selected references are used to describe the economy of the area historically and currently. Interpretations and assessments of the timber resource in the continuing economy are made.

The 1975 Oregon timber harvest declined to its lowest level since 1961 with a harvest of 7.37 billion board feet, 991 million board feet (11.9 percent) below the 1974 harvest. The harvest was down in both western Oregon (823 million board feet, 13.2 percent) and eastern Oregon (168 million board feet, 7.7 percent). For the first time since 1961, the harvest on private lands exceeded harvest on public lands, making up 51.3 percent of the total.

The 1974 timber harvest of 6.88 billion board feet declined 933 million board feet (11.9 percent) below the record 1973 harvest. Decreases occurred in almost all owner groups. In western Washington the decline was 856 million board feet (13.0 percent). In eastern Washington the decline was 76 million board feet (6.3 percent).

This report summarizes a 1973 timber resource inventory of Douglas County, Oregon. Detailed tables of forest area, timber volume, growth, mortality, and cut are presented. A discussion of the present resource situation highlights the condition of cutover lands and the opportunities for silvicultural treatment.