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ScholarsArchive at Oregon State University
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Six headwalls in the central Oregon coast range were selected for study of soil engineering properties and vegetative
characteristics important for analysis of slope stability. The headwalls were considered representative of those which would be...
1990-11-29 (iso8601)
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Two hilislope sites in the central Oregon Coast Range were instrumented and monitored for winter precipitation and saturated and unsaturated subsurface conditions. The study sites were near-ridge depressions typically known as headwalls. Based on...
1996-12-06 (iso8601)
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Critical skyline and mainline tensions were identified as the conditions necessary for successful carriage passage uphill over an
intermediate support jack. These critical tensions were measured during field tests and compared with predicted...
1978-05-05 (iso8601)
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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...
1972-06-06 (iso8601)
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The natural fall of trees in riparian areas is an important source of coarse woody debris for mountain streams, improving fish habitat and influencing stream morphology. Existing models consider the probability of coarse woody debris entering a...
1994-06-06 (iso8601)
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This study evaluated the effects of a crawler tractor, a rubber-tired skidder, and a torsion suspension vehicle on several soil and hydrologic properties in the western Sierra Nevada Mountains of California. Four sites, with soil textural classes...
1980-12-12 (iso8601)
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Forest engineers must frequently make flood frequency estimates for
very small watersheds when designing culvert installations. Empirical
formulae and simplified rainfall runoff models, the most commonly used
techniques to predict floods from very...
1982-01-01 (iso8601)
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This study describes streams in the Blue Mountains and Wallowa Mountains of Northeastern Oregon in order to characterize the interactions between the terrestrial and aquatic ecosystems and to determine how logging affects those relationships. Five...
1989-06-01 (iso8601)
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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...
1976-05-07 (iso8601)
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Designing timber harvesting units is a challenging task. The task requires decision making on logging equipment, landing site, cable road profile, road location, and transportation system. Traditionally forest planners have done the task manually....
2002-09-13 (iso8601)
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Mass wasting events are a principal form of erosion that occurs on steep forest land throughout the Pacific Northwest. Numerous studies have reported that tree roots help stabilize steep forest land. A complete
understanding of the mechanism by...
1987-09-22 (iso8601)
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Cancer is one of the leading causes of death in the U.S., and new approaches to
control cancer are constantly sought. This dissertation is comprised of two parts: (i)
improving the uptake and retention of gadolinium in tumors for potential...
2008-09-26T19:07:10Z (iso8601)
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Fire exclusion in the western U.S.A. has caused fuel loads to build up and overall
forest health to decline. Managers are now looking for ways to reduce these fuel loads
while reintroducing some of the desired effects of natural wildfire. One...
1999-04-26 (iso8601)
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The prioritization of road maintenance projects is an important forest engineering
task subject to limited budgets and competing investment needs. Large investments are made each year to maintain and upgrade forest road networks to meet economic...
2004-09-24 (iso8601)
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Esmond Creek is a tributary to the Siuslaw River located in the Oregon Coast Range. It is 18 km in length and drains a watershed area is 48.9 km². Average channel gradient of the study reach is 0.9%. In 1988 a landslide
occurred in the Esmond...
1993-01-29 (iso8601)
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Multispan skyline logging systems are cable systems designed to yard logs over steep terrain having a constant or convex slope. An intermediate skyline support is used to raise the skyline high enough to achieve ground clearance without...
1998-09-02 (iso8601)
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Sediment transport measurements on Flynn Creek, a headwater stream in the Oregon Coast Range, have illustrated the magnitude of
fluvial transfer processes, primarily of the bedload component, during a moderate storm runoff season (1979 water...
1979-11-06 (iso8601)
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This study was conducted at portions of Trap Bay Creek, a medium-sized third-order stream on Chichagof Island, Southeast Alaska, to
1) quantify short-term sediment transport and channel morphology changes, 2) relate measured sediment transport...
1982-06-02 (iso8601)
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This paper describes the results of a project conducted to determine
the magnitude of and the parameters affecting the magnitude of the
cable tensions generated during lateral yarding operations in a cable
thinning. Specific emphasis was placed on...
1979-05-25 (iso8601)
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Simulation of storm hydrographs in the Oregon Coast Range was explored using the Soil Conservation Service (SCS) curve number methodology, and by developing and testing an antecedent precipitation index (API) method.
Standard SCS procedures...
1987-05-19 (iso8601)
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This thesis describes the results of a project conducted to determine the economics of forest road maintenance alternatives
between periods of timber harvesting. An open road and a closed road alternative will be compared to the economics of...
1984-04-27 (iso8601)
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