Index Catalog // ScholarsArchive@OSU

Post-eruption recovery and secondary production of grazing insects in two streams near Mt. St. Helens

Creator:: Meyerhoff, Richard Dietrich
Abstract:: The eruption of Mt. St. Helens provided the opportunity to study secondary production of grazing insects in the context of disturbance. Two stream sites were chosen that significantly differed in how their watersheds were impacted by the eruption. Clearwater Creek was catastrophically disturbed (physical alteration of habitat, loss of riparian...
Resource Type:: Dissertation
Full Text:: . Disturbance from ash scour during the 1980-81 winter reset the benthos of Elk Creek. However, the recovery

Effects of clay-water interactions on water retention in porous media

Creator:: Lenhard, Robert J. (Robert James)
Abstract:: Capillary pressure-saturation data obtained for unconsolidated porous media with different liquids are examined to investigate the effects of clay-liquid interactions on liquid retention. Liquid retention functions are assumed to reflect the effective pore-size distributions. The hydraulic variables, capillary pressure and saturation, are transformed to account for changes in liquid retention...
Resource Type:: Dissertation
Full Text:: Data 6 7 8 9 14 17 19 20 21 23 26 29 37 58 61 62 64 65 75 81 102 104 109 110 114

Effects of pressure and deposit thickness on the stabilization rate of benthic marine sludge deposits

Creator:: Muellenhoff, W. P.
Abstract:: The biochemical degradation of domestic sludge deposits exposed to benthic marine conditions was investigated using a laboratory Deep Sea Simulator. The rate and extent of deposit stabilization were determined for select hydrostatic pressures and hydrogen acceptor conditions by monitoring depletion of particulate organic carbon in 2.0 and 3.0 centimeter deposits....
Resource Type:: Dissertation
Full Text:: 80 17. Particulate Organic Carbon, Experiment 1, 34 Atmospheres 81 18. Particulate Organic Carbon

Cumulative effects of land use on salmon habitat in southwest Oregon coastal streams

Creator:: Frissell, Christopher Andrew, 1960-
Abstract:: As part of a hierarchical approach to classifying watersheds and stream habitats based on geomorphic and geologic criteria, we defined ten classes of fluvial and lacustrine habitats at the scale of valley segments. Valley segments are landscape units which encompass surface waters and the adjacent floodplains and hillslopes with which...
Resource Type:: Dissertation

Polar organic compounds as tracers of environmental processes

Creator:: Medeiros, Patricia Matheus de
Abstract:: Sources of polar/water-soluble organic compounds conjunctly with apolar biomarkers were characterized in natural organic matter. This multi-biomarker approach was accomplished by a simple analytical method consisting of extraction with dichloromethane:methanol (2:1, v/v), silylation and analysis by gaschromatography- mass spectrometry (GC-MS). Polar and apolar biomarkers, derived mainly from higher plants and...
Resource Type:: Dissertation

The control and fate of enteric bacteria in the environment with particular emphasis on the factors influencing fecal indicator survival in waste storage facilities

Creator:: Crane, Stuart R.
Abstract:: The indiscriminate release of fecal bacteria to the environment can present a public health hazard when pathogenic species gain access to drinking and recreational water sources. The extent of bacterial contamination of surface and ground waters associated with animal production units and waste application areas seems largely dependent on the...
Resource Type:: Dissertation

Relationships of clay mineralogy to landscape stability in Western Oregon

Creator:: Taskey, Ronald D. (Ronald David), 1944-
Abstract:: Soil erosion by mass wasting is the major problem on forest lands of the Pacific Northwest, The clay fractions of soils from a large number of sites in Oregon's Western Cascades were characterized in order to determine the relationships of various clay materials to mass movements. Each site was either...
Resource Type:: Dissertation
Full Text:: Rotational Slump 74 Earthflows 81 Creep 90 Stable 92 V. THE OVERALL SIGNIFICANCE OF CLAY MINERALOGY IN

Soil solution chemistry, profile development, and mineral authigenesis in several western Oregon soils

Creator:: Glasmann, Joseph Reed
Abstract:: Clay mineral genesis was studied in soils representative of several different geomorphic surfaces in western Oregon, ranging in age from Pliocene-early Pleistocene to late Pleistocene. Soil solution studies, clay mineralogy, and soil raicromorphology were employed to provide evidence of clay mineral synthesis and interpret soil genesis. Soils at each study...
Resource Type:: Dissertation
Full Text:: 3 74 Zone 4 81 Conclusions 83 CHAPTER III. Clay mineral genesis in soils developed from the Late

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

Creator:: Davies, Kirk W.
Abstract:: This study consisted of two research projects in the Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis (Beetle & A. Young) S.L. Welsh) alliance, the most extensive of the big sagebrush complex in the Intermountain West. In the first project, we intensively sampled 107 relatively undisturbed, late seral Wyoming big sagebrush...
Resource Type:: Dissertation

Input/output energy analysis of regional water pollution control

Creator:: Heggen, Richard J.
Abstract:: Two strategic approaches to water quality control in Oregon's Willamette River are presently being utilized: point source treatment and flow augmentation. Dry weather releases from reservoirs are for authorized purposes other than water quality. Reservoirs can participate in pollution control by summer flow augmentation where authorized water resource objectives (flood...
Resource Type:: Dissertation
Full Text:: , B for Cost Model 75 8 Probable Effects of Altered Low Flow Maintenance, Willamette River 81 9

ScholarsArchive@OSU

Post-eruption recovery and secondary production of grazing insects in two streams near Mt. St. Helens

Effects of clay-water interactions on water retention in porous media

Effects of pressure and deposit thickness on the stabilization rate of benthic marine sludge deposits

Cumulative effects of land use on salmon habitat in southwest Oregon coastal streams

Polar organic compounds as tracers of environmental processes

The control and fate of enteric bacteria in the environment with particular emphasis on the factors influencing fecal indicator survival in waste storage facilities

Relationships of clay mineralogy to landscape stability in Western Oregon

Soil solution chemistry, profile development, and mineral authigenesis in several western Oregon soils

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

Input/output energy analysis of regional water pollution control

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search