Index Catalog // ScholarsArchive@OSU

Patterns and processes of sediment transport following sediment-filled dam removal in gravel bed rivers

Creator:: Stewart, Gregory B.
Abstract:: Dam removal is increasingly viewed as a river restoration tool because dams affect so many aspects of river hydrology, geomorphology, and ecology; but removal also has impacts. When a dam is removed, sediment accumulated over a dam’s lifetime may be transported downstream; and the timing, fate and consequences of this...
Resource Type:: Dissertation
Full Text:: for, posed environmental or safety concerns, and/or were removed because costs of dam rehabilitation

Understanding the impact of climate change on snowpack extent and measurement in the Columbia River Basin and nested sub basins

Creator:: Brown, Aimee Lyn
Abstract:: Shifting climate patterns in the Columbia River basin are affecting snow pack, and, as a result, stream flow throughout the region. In the Oregon Cascades, ever growing populations, and their associated activities, place increasing stress on an already over allocated hydrologic system. Political pressures, including the possibility of renegotiation or...
Resource Type:: Masters Thesis
Full Text::  180% of average SWE of the snow covered area. Using elevation,  aspect and slope, a 16‐node binary

Hydrologic integration of forest roads with stream networks in two basins, western Cascades, Oregon

Creator:: Wemple, Beverly C.
Abstract:: This study assessed how logging-access roads may have contributed to observed historical increases in peak discharges associated with small and large logged basins in the western Cascades of Oregon. The study was conducted on the Lookout Creek (62km²) and the upper Blue River (118km²) basins. Potential road effects on hydrology...
Resource Type:: Masters Thesis

Riparian cover changes associated with flow regulation and bank stabilization along the Upper Willamette River in Oregon between 1939 and 1996

Creator:: Gutowsky, Sharon L.
Abstract:: This study investigates riparian cover change between 1939 and 1996 utilizing aerial photography, bank conditions and stream gauge data. Three sites under 1.0 km2, along a 10- km reach north of Harrisburg, Oregon, were evaluated. The cover classification scheme included 18 classes composed of 3 canopy densities and 8 structural...
Resource Type:: Masters Thesis

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

Creator:: Ersek, Vasile
Abstract:: This dissertation presents the results of three studies that assessed climate variability on short and long timescales in western United States. The growth of carbonate formations in caves (speleothems) is used to infer the timing and amplitude of past climate variability. We first assess the controls on speleothem growth for...
Resource Type:: Dissertation
Full Text:: ................................................................................................... 2 2. Environmental influences on speleothem growth in southwestern Oregon during the last 380 000

Sensitivity analysis of the Catchment Modeling Framework (CMF) and use in evaluating two agricultural management scenarios

Creator:: Metta, John W. P.
Abstract:: Abstract Watershed-scale fate/transport modeling of contaminants is a tool that scientists and land managers can use to assess pesticide contamination to stream systems. The Catchment Modeling Framework (CMF) is a catchment-scale fate/transport modeling tool. It was developed to help scientists and land managers assess the effects of possible land-use decisions...
Resource Type:: Masters Thesis
Full Text:: developed in GIS by changing land-use/land cover (LULC) attributes, then GIS based environmental models can

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Creator:: Tepley, Alan J.
Abstract:: Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Resource Type:: Dissertation

Soil erosion and vegetation loss accelerated by visitor use of Paradise Meadows, Mount Rainier National Park

Creator:: Fritzke, Susan L.
Abstract:: Recreational impacts on the subalpine-alpine ecosystems of Mount Rainier National Park have developed over the past century, and today pose a major problem for park managers. Field data were collected during the summer of 1987 in the Paradise meadows area in order to describe visitor impacts on social trails (trails...
Resource Type:: Masters Thesis

A method for remotely monitoring glaciers with regional application to the Pacific Northwest

Creator:: Medley, Brooke
Abstract:: An integrative method for monitoring glacier geometry change and mass balance is presented and applied to the Pacific Northwest, USA. Acting as a baseline for interpretation of future changes in glacier size and shape, we first derive a new inventory of regional glacier cover using remotely sensed data. To investigate...
Resource Type:: Masters Thesis
Full Text:: al., 2007), the environmental impacts of glacier retreat in Oregon and Washington are materializing

Quantification of the nitrate attenuation capacity of low-permeability Missoula Flood deposits in the Willamette Valley of Oregon

Creator:: Arighi, Louis M.
Abstract:: Low-permeability geologic units may offer significant chemical and hydraulic protection of adjacent aquifers, and are important for managing groundwater quality, especially in areas with significant non-point source contamination. Nitrate in the Willamette Valley is attenuated across the Willamette Silt, a semi-confining unit overlying a regionally important aquifer. To quantify the...
Resource Type:: Masters Thesis
Full Text:: Survey, the Oregon Department of Environmental Quality, and ChevronTexaco. TABLE OF CONTENTS

ScholarsArchive@OSU

Patterns and processes of sediment transport following sediment-filled dam removal in gravel bed rivers

Understanding the impact of climate change on snowpack extent and measurement in the Columbia River Basin and nested sub basins

Hydrologic integration of forest roads with stream networks in two basins, western Cascades, Oregon

Riparian cover changes associated with flow regulation and bank stabilization along the Upper Willamette River in Oregon between 1939 and 1996

Past climate variability in southwestern Oregon and relationships with regional and hemispheric climate

Sensitivity analysis of the Catchment Modeling Framework (CMF) and use in evaluating two agricultural management scenarios

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Soil erosion and vegetation loss accelerated by visitor use of Paradise Meadows, Mount Rainier National Park

A method for remotely monitoring glaciers with regional application to the Pacific Northwest

Quantification of the nitrate attenuation capacity of low-permeability Missoula Flood deposits in the Willamette Valley of Oregon

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