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Filtering by: Academic Affiliation Forest Engineering Remove constraint Academic Affiliation: Forest Engineering Advisor Froehlich, Henry A. Remove constraint Advisor: Froehlich, Henry A.

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Soil compaction on a mechanized timber harvest operation in eastern Oregon

Creator:

Zaborske, Richard R.

Abstract:

The use of mechanized harvest equipment has been increasing as an economical method to harvest small diameter timber. While the use of this equipment is increasing, little is known about associated soil compaction. In particular, little information exists on soil compaction caused by feller--bunchers. This study measured soil compaction caused...

Resource Type:

Capstone Project
Hydrologic factors and environmental impacts of mass soil movements in the Oregon Coast Range

Creator:

Ketcheson, Gary Leslie

Abstract:

Mass soil movements of four types; debris avalanche, debris torrent, debris slide and bank slough, were field inventoried in the Oregon Coast Range. A total of 104 mass movements were located in 21 undisturbed watersheds and 13 clearcuts harvested in the last six years. Failures associated with roads and landings...

Resource Type:

Masters Thesis
Summer low flow characteristics of forest streams in northeast Oregon

Creator:

Widner, Gregory L.

Abstract:

Summer low flow characteristics of six forest streams in Northeast Oregon were examined using long term streamflow records. Time series and trend analysis revealed highly significant (alpha=O.O1) increasing trends in summer low flow over the period of record on four of the selected streams, and significant (alpha=O.05) year-to-year dependence on...

Resource Type:

Masters Thesis
Restoring productivity of compacted forest soils with tillage

Creator:

Whitaker, Carol Anne

Abstract:

Tillage of forest soils compacted by ground-based logging systems is a practice that is becoming widely accepted in the Pacific Northwest. However, past research has failed to adequately define the conditions and specifications that particular tillage operations should meet in order to produce the maximum growth response from planted seedlings....

Resource Type:

Masters Thesis
Chronological variation in soil density and vegetative cover of compacted skid trails in clearcuts of the western Oregon Cascades

Creator:

Vanderheyden, Jon

Abstract:

This study evaluated the recovery of compacted soils on logging skid trails in clearcuts of the western Cascade Mountains of Oregon. Soil types included clay, clay loam, silt loam, loam, sandy loam and loamy sands. Sites ranged in age from five to 38 years since harvest and 370 to llOOm...

Resource Type:

Masters Thesis
Trends in riparian vegetation regrowth following timber harvesting in western Oregon watersheds

Creator:

Summers, Richard P.

Abstract:

This study investigated the development of riparian zone vegetation at varying stand ages from one to 29 years following clearcut timber harvesting in western Oregon. Vegetation was classified into three layers for observation including the ground (less than 13 cm), the understory (less than 2.5 m), and the overstory (greater...

Resource Type:

Masters Thesis
The effect of major environmental factors on growth rates of five important tree species in Costa Rica

Creator:

Camacho, Pablo

Abstract:

The growth of Alnus acuminata (HBK) 0. Ktze, Cupressus lusitanica Mill., Gmelina arborea Roxb, Pinus caribaea var. hondurensis Barr. & Golf., and Tectona grandis L. in Costa Rica and twenty seven soil and climatic factors were analyzed to determine the relationship between major environmental factors and growth rates of these...

Resource Type:

Masters Thesis
Mass erosion occurrence and debris torrent impacts on some streams in the Willamette National Forest

Creator:

Chesney, Charles J.

Abstract:

This study focused on extensive soil mass movement occurrence in the Willamette National Forest of western Oregon and on intensive measurements of some physical and biological changes in streams following debris torrents. Debris torrents are a rapid movement of water-charged debris confined to steep headwater channels. The frequency (events/ha/yr) of...

Resource Type:

Masters Thesis
Streamside buffer strips : survival, effectiveness, and design

Creator:

Steinblums, Ivars John

Abstract:

Stream buffer strips are an important tool for protecting the stream environment. This research documents the losses from 40 stream buffer strips, in the Western Cascades of Oregon, established 1 to 15 years before the study. Predictive equations are developed which identify the major reasons for buffer strip losses. Losses...

Resource Type:

Masters Thesis
Long-term effects of changes in vegetation condition, precipitation and watershed parameters on summer low-flows in the semi-arid Pacific Northwest

Creator:

Zeb, Aurang

Abstract:

Summer low-flow behavior in the semi-arid areas of the Pacific Northwest was studied. Long-term data from thirty-eight streams/rivers and thirty-six precipitation stations was exploited. The study area was divided into five zones based on annual average precipitation. Trends and patterns in summer low-flows and precipitation were identified. Different zones showed...

Resource Type:

Dissertation

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Academic Affiliation

Forest Engineering[remove]23

Advisor

Froehlich, Henry A.[remove]23

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1973 to 1995

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Committee Member

Beschta, Robert2
Beschta, Robert L.2
Adams, Paul1
Atkinson, William A.1
Buckhouse, John1
more Committee Members »

Creator

Zeb, Aurang2
Andrus, Charles W.1
Cafferata, Peter Herman Louis1
Camacho, Pablo1
Carlson, Joan Y.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1972 to 1994

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Decade

1990-19996
1980-198912
1970-19795

Degree Field

Forest Engineering22
Forest Engineering (Hydrology)1

Degree Level

Master's22
Doctoral1

Degree Name

Master of Science (M.S.)21
Doctor of Philosophy (Ph.D.)1
Master of Forestry (M.F.)1

Language

English [eng]23

Non-Academic Affiliation

Oregon State University. Graduate School22

Peer Reviewed

No18

Resource Type

Masters Thesis21
Capstone Project1
Dissertation1

Rights Statement

Copyright Not Evaluated23

Subject

Logging -- Environmental aspects3
Stream measurements -- Oregon3
Coarse woody debris -- Oregon2
Logging -- Environmental aspects -- Oregon2
Plants, Effect of soil compaction on2
more Subjects »

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