Treesearch

This study notes the increasing concern over logging residue in forest land management and describes the various administrative and technological means for accomplishing reductions of logging residue. Alternative sales arrangements can include such things as reduction of stumpage charges for low quality logs or required yarding of unutilized material to the landing or to some stockpiling or disposal point. Improvements in materials handling can include use of logging systems that create less breakage or that can handle small pieces more efficiently. Specialized chip mills and increased...

An annotated bibliography supplementing bibliographies by Tarrant for 1956 through 1963 and by Klock for 1969 through 1974.

Climatic and hydrologic measurements were made on three watersheds, each containing approximately 2 square miles (5.18 km2) of drainage area, for 9 years under natural forested conditions. This paper describes the watersheds with respect to soils and geology, morphology, vegetation, precipitation and other climatic parameters, and flow, sediment, temperature, and chemistry of streams during this period.

This bibliography provides descriptions of material published on recreation and scenic resources in Alaska. Included are publications on research and supporting material in the form of studies and reports, proposals, plans, historical and cultural references, bibliographic documents, and popular books and articles describing the resources of Alaska and issues relating to their management and use. It contains author and keyword indexes.

This paper is basically an alpha code and name listing of forest and rangeland grasses, sedges, rushes, forbs, shrubs, and trees of Oregon, Washington, and Idaho. The code expedites recording of vegetation inventory data and is especially useful to those processing their data by contemporary computer systems. Editorial and secretarial personnel will find the name and authorship lists to be handy desk references.

Six series of photographs display forest residue loading levels, by size classes, for areas of timber type and cutting practice. Information with each photo includes measured weights, volumes and other residue data, information about the timber stand and harvest or thinning actions and fuel ratings. These photo series provide fast and easy-to-use means for quantifying and describing existing and expected residues.

Forest management activities, including roadbuilding, clearcut logging, and broadcast burning, can change certain portions of the forest hydrologic cycle. Watershed studies and other hydrologic research in the Coast and western Cascade Ranges of Oregon have shown that these changes may increase annual water yield up to 62 centimeters, double minimum flows in summer, and increase fall peak flows up to 200 percent and small winter peak flows up to 45 percent in small watersheds. Changes in streamflow resulting from clearcut logging had little effect on either onsite damage to stream channels...

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.