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Load bearing capacity of alder, spruce and hemlock tail trees

Creator:: Pugh, Edwin V.
Abstract:: This paper presents an evaluation of the cable loading support capacity of red alder, Alnus rubra Bong., Sitka spruce, Picea sitchensis (Bong.) Carr, and western hemlock, Tsuga heterophylla (Raf.) Sarg., tail trees. Capacity is measured in terms of combined stress resulting from compression and bending, rather than the traditional methods...
Resource Type:: Capstone Project

Load-deformation characteristics of multiple stump anchor systems

Creator:: Toupin, Richard C.
Abstract:: This paper documents the development of a model which determines multiple stump anchor system displacement as a response to skyline load for four anchor rigging configurations: 1. Series multiple, 2. Tieback, 3. Elevated tieback, and 4. Equalizer block. It also documents the field testing of four two stump anchors rigged...
Resource Type:: Capstone Project

An investigation of the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils

Creator:: Smith, Russell S.
Abstract:: A study was conducted to investigate the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils. The design and operation was developed of an apparatus capable of modeling rainfall-induced shallow hill-slope failures that also permitted observation of the soil volume change tendencies at...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Marvin R,'yles A study was conducted to investigate the influence of root

The short term temporal and spatial variability of nitrogen and phosphorus in two Oregon Coast Range streams

Creator:: Scherer, Robert A.
Abstract:: High intensity sampling was undertaken to characterize the temporal and spatial variability of oxidized nitrogen (NO3-N + NO2-N), ammonia-nitrogen (NH3-N), total dissolved phosphorus, total unfiltered phosphorus and orthophosphorus (PO4-P) from two adjacent small streams in Western Oregon's Coast Range, Deer Creek (303 ha) and Flynn Creek (203 ha). Deer Creek...
Resource Type:: Masters Thesis

Test procedures for low-confining stress, multistage triaxial testing of compacted cohesive soils

Creator:: Kliewer, Julie E.
Abstract:: The use of the triaxial test to characterize the strength of soils for civil engineering applications is widespread. These tests are typically conducted with confining stresses in excess of 5 psi. To characterize the strength of a soil located in the upper layers of the subgrade of an aggregate surfaced...
Resource Type:: Masters Thesis

Peakflow causative mechanisms and frequencies at Reynolds Creek, southwestern Idaho

Creator:: Kirkham, Tracie
Abstract:: Peakflow frequency analysis is used in forest hydrology for designing stream crossing structures such as culverts and bridges. The traditional approach to frequency analysis is based on the assumption that the observed sample of peakflows represents a homogeneous population. It is not clear if using the "homogeneous" population of the...
Resource Type:: Masters Thesis
Full Text:: Reynolds Creek, Southwestern Idaho. Abstract Approved: ---------~~--~--------Marvin R. Pyles Peakflow

Mechanical stresses in trees resulting from strain compatibility in an anisotropic material

Creator:: Lyons, Charles Kevin
Abstract:: Consider the bole of a tree to consist of a linear elastic material that is orthotropic with respect to the cylindrical coordinates. When the bole of a tree is subjected to resultant loads in the directions of the Cartesian base vectors, the S₁₁, S₂₂, S₃₃, and S₁₂ stresses in Cartesian...
Resource Type:: Dissertation

Shear stress transfer between roots and soil

Creator:: Commandeur, P. R.
Abstract:: 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 which roots strengthen soil would enable modeling to more closely approximate field...
Resource Type:: Masters Thesis

The spatial and temporal variability of nitrate in streams of the Bull Run Watershed, Oregon

Creator:: Bakke, Paul D.
Abstract:: An 18-year record of nitrate (NO₃), orthophosphate, total nitrogen and total phosphorus in four streams of the Bull Run watershed, Oregon, was examined to determine its precision and time resolution. Of these four species, only NO₃ was found to be known to a sufficient level of detail for modeling and...
Resource Type:: Masters Thesis

Reducing sediment production from forest roads during wet-weather use

Creator:: Toman, Elizabeth Myers
Abstract:: Forest roads produce fine sediment with traffic during wet weather. If the forest road is connected to a stream it can be a source of turbidity and fine sediment that may be detrimental to aquatic organisms especially salmonids. The goal of this work was to investigate turbid runoff during wet-weather...
Resource Type:: Dissertation
Full Text:: : ________________________________________ _____________________________________ Arne E. Skaugset Marvin R. Pyles Forest roads

ScholarsArchive@OSU

Load bearing capacity of alder, spruce and hemlock tail trees

Load-deformation characteristics of multiple stump anchor systems

An investigation of the influence of root reinforcements on soil strength and the initiation of static liquefaction in forest soils

The short term temporal and spatial variability of nitrogen and phosphorus in two Oregon Coast Range streams

Test procedures for low-confining stress, multistage triaxial testing of compacted cohesive soils

Peakflow causative mechanisms and frequencies at Reynolds Creek, southwestern Idaho

Mechanical stresses in trees resulting from strain compatibility in an anisotropic material

Shear stress transfer between roots and soil

The spatial and temporal variability of nitrate in streams of the Bull Run Watershed, Oregon

Reducing sediment production from forest roads during wet-weather use

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