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Influences of the duration of periodic sway on the stem form development of four-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Carlton, Ronald Roy
Abstract:: Stem form development of trees in response to wind has been established in the literature to be a response to stem sway induced by the wind. The response is manifested in modifications to height and diameter growth which strengthen the stem against wind stresses. Experiments in the literature show that...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Engineering (Hydrology) presented on May 7, 1976 Title

Controlling water temperatures with buffer strips

Creator:: Brazier, Jon Roger
Abstract:: Buffer strips have been proposed as a method for controlling temperature changes in streams adjacent to clear-cuttings. Nine small mountain streams in Oregon's Coast Range and Cascade Mountains were studied to determine the influence of buffer strips on water temperature. Timber volume in the strip, strip width, and canopy density...
Resource Type:: Masters Thesis

Soil engineering properties and vegetative characteristics for headwall slope stability analysis in the Oregon coast range

Creator:: Bransom, Mark
Abstract:: Six headwalls in the central Oregon coast range were selected for study of soil engineering properties and vegetativecharacteristics important for analysis of slope stability. The headwalls were considered representative of those which would be candidates for timber leave areas due to geomorphic and topographic features, including steepness of slope and...
Resource Type:: Masters Thesis
Full Text:: Engineering in Charge of Major Head of Department of Forest Engineering Dean of Graduate School Date

A decision support system for mechanized harvesting

Creator:: Steffert, Alan H.
Abstract:: When considering a mechanized harvesting operation, the harvest planner or researcher is faced with a multitude of modern equipment choices. A decision support system (DSS) is presented to assist in selecting the appropriate level of mechanization. The DSS examines individual machines and formulates mechanized harvesting systems from them that adequately...
Resource Type:: Capstone Project

FishXing: evaluation of fish passage culvert model and comparision with Oregon Department of Forestry's compliance with fish passage and peak flow requirements at stream crossings

Creator:: Morrissette, Brett A.
Abstract:: FishXing (fish crossing), a computer aided stream crossing culvert model designed to analyze fish passage through culverts was compared with results of an Oregon Department of Forestry fish passage monitoring report. FishXing was created at Humboldt State University through sponsorship from the US Forest Service, USDA, Stream Team, Six Rivers...
Resource Type:: Capstone Project
Full Text:: of Master of Forestry Presented to: Department of Forest Engineering Oregon State University

Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

Creator:: Curtis, Richard James
Abstract:: This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...
Resource Type:: Capstone Project

Development of a cable logging system analysis package for micro-computers

Creator:: Chung, Joosang
Abstract:: A computer program package to estimate cable yarding payload capability was made. The package was intended to expand applicability of existing packages and to be user friendly. It has six system options: live skyline, standing skyline, running skyline, slackline, multispan and highlead. In the standing skyline and multispan analyses, load...
Resource Type:: Capstone Project

Soil compaction from ground-based thinning and effects of subsequent skid trail tillage in a Douglas-fir stand

Creator:: Hogervorst, Johan Bryan
Abstract:: Although soil tillage has been used successfully to alleviate compaction of forest soil after logging in a number of management contexts, little is known about the feasibility of tilling in residual stands. In an attempt to weigh the benefits of tillage against possible damage done to residual trees during tillage,...
Resource Type:: Capstone Project

An analysis of the slackpulling forces encountered in manual thinning carriages

Creator:: Iff, Ronald H.
Abstract:: The popularity of gravity-return skyline logging systems is now increasing in the Western United States. Simplicity seems to be the basis for their success. While two drum yarders are most commonly used, ·some systems, such as the Wyssen, use only a single drum for yarding. Carriages commonly used with these...
Resource Type:: Capstone Project

Log truck performance on curves and favorable grades

Creator:: Jackson, Ronald Kelton
Abstract:: This paper describes the results of a study of log truck travel speeds in three locations in Western Oregon on favorable grades and curves. Independent variables of grade, curve radius, width, ditch depth, superelevation, sight distance, time of day, and maximum engine braking horsepower were regressed against speed. Only grade...
Resource Type:: Capstone Project

ScholarsArchive@OSU

Influences of the duration of periodic sway on the stem form development of four-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Controlling water temperatures with buffer strips

Soil engineering properties and vegetative characteristics for headwall slope stability analysis in the Oregon coast range

A decision support system for mechanized harvesting

FishXing: evaluation of fish passage culvert model and comparision with Oregon Department of Forestry's compliance with fish passage and peak flow requirements at stream crossings

Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

Development of a cable logging system analysis package for micro-computers

Soil compaction from ground-based thinning and effects of subsequent skid trail tillage in a Douglas-fir stand

An analysis of the slackpulling forces encountered in manual thinning carriages

Log truck performance on curves and favorable grades

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