Index Catalog // ScholarsArchive@OSU

Simulated storm runoff characteristics between natural and altered ecosystems in the Oregon Range Validation Area

Creator:: Bolognani, Domenic Affrunti
Abstract:: During the summer of 1980 an infiltration/sedimentation study was conducted on the Oregon Range and Related Resource Validation Project Work Area in the Blue Mountains of east-central Oregon. A modified Rocky Mountain infiltrometer was used to simulate a 28 minute high intensity rainfall event to determine mean infiltration rates and...
Resource Type:: Masters Thesis
Full Text:: along the main stem of the John Day River, the lower North Fork, and to a lesser extent, on portions of

Prescribed fire effects on vegetation and arthropod dynamics, and sampling techniques in a Wyoming big sagebrush community

Creator:: Rhodes, Edward C.
Abstract:: In the western United States, sagebrush (Artemisia spp L.) dominated rangelands are extensive, accounting for approximately 63 million ha. The Wyoming big sagebrush (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young) alliance is found in more xeric environments, occupying the largest area of the big sagebrush complex in areas within...
Resource Type:: Masters Thesis
Full Text:: the most abundant shrub on the lowland ranges of western North America, occurs in dry, deep, and well

Sediment potentials for selected ecological land units in central Oregon

Creator:: Mattison, Jeffrey L.
Abstract:: During the summers of 1975 and 1976 a sedimentation study was conducted in the Bear Creek watershed, located in the southeastern corner of Crook County, in central Oregon. The Rocky Mountain infiltrometer was used to simulate high intensity rainfall over 468 sedimentation plots. Rainfall and runoff were measured and a...
Resource Type:: Masters Thesis
Full Text:: faults) occur in the north-central portion and radial patterns (indicative of volcanoes or Barnes) also

Historical land use and its impact on Oak Creek, Oregon

Creator:: Yamaguchi, Keiko, 1964-
Abstract:: The purposes of this study were:1) to review the land use history of Oak Creek watershed since European settlement. And 2) to consider the human-caused impacts and their effects associated with different land uses. The study area was classified into three land use patterns: residential,agricultural, and forested areas.Since the European...
Resource Type:: Masters Thesis
Full Text:: experienced changes of land use simultaneous with the development of the city of Corvallis and its vicinity

Overland flow and sediment production potentials in logged and nonlogged sites of a ponderosa pine forest in northeastern Oregon

Creator:: Williams, John Dana
Abstract:: The purpose of this research was to determine if overland flow and sediment production were different in logged (on snow, frozen soil, and prescribed skid trails) and nonlogged sites in a Pinus ponderosa Laws.! Symohoricaroos albus Laws. community in the foothills of the Wallowa Mountains in northeastern Oregon. To determine...
Resource Type:: Masters Thesis
Full Text:: ). Vegetation, in turn, plays a significant role in the development and maintenance of the soil by its

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

Creator:: Fisher, Michael, (Michael Patrick), 1966-
Abstract:: Current research indicates that the expansion of western juniper can inhibit soil water retention, storage and prolonged releases from watersheds. This phenomenon is of great importance in eastern Oregon, as western juniper is encroaching into sagebrush/grass communities with a correlated reduction in herbaceous ground cover, resulting in reduced infiltration rates...
Resource Type:: Dissertation
Full Text:: of Hydrology and Erosion in Small, Paired Watersheds in a juniper-sagebrush Area of Central Oregon

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

Creator:: Swanson, Sherman R.
Abstract:: Infiltration, soil erosion, nitrogen loss and soil profile characteristics were measured on 36 sites representing land occupied by Artemisia tridentata ssp. tridentate, wyomingensis, and vaseyana. Infiltration, soil erosion, and nitrogen loss were strongly correlated but highly variable. Soil loss, but not infiltration or nitrogen loss was significantly different between subspecies....
Resource Type:: Dissertation
Full Text:: subspecies and most of the signifi- cant physical and chemical differences between subspecies, including

The response of soils, streambanks and instream coliform bacteria levels to grazing management in a riparian area

Creator:: Bohn, Carolyn C.
Abstract:: This thesis describes a case study of the effects of five systems of grazing on watershed values in a deteriorated riparian area. Soil infiltration, bulk density and penetrability, streambank edge movement and coliform bacteria were monitored for seven years along a stream in the Blue Mountains of northeastern Oregon. For...
Resource Type:: Masters Thesis
Full Text:: The response of soils, streambanks and instream coliform

Paired watershed ecological analysis

Creator:: Fisher, Michael, (Michael Patrick), 1966-
Abstract:: This study was designed to provide a physical and ecological analysis of paired watersheds in the semi-arid western juniper (Juniperus occidentalis) woodlands of Central Oregon. Instrumentation and monitoring was accomplished in Jensen and Mays watersheds as the preliminary portion of a longer term project. Instrumentation was designed to address changes...
Resource Type:: Masters Thesis
Full Text:: This study was designed to provide a physical and ecological analysis of paired watersheds in the

ScholarsArchive@OSU

Simulated storm runoff characteristics between natural and altered ecosystems in the Oregon Range Validation Area

Prescribed fire effects on vegetation and arthropod dynamics, and sampling techniques in a Wyoming big sagebrush community

Sediment potentials for selected ecological land units in central Oregon

Historical land use and its impact on Oak Creek, Oregon

Overland flow and sediment production potentials in logged and nonlogged sites of a ponderosa pine forest in northeastern Oregon

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

Infiltration, soil erosion, nitrogen loss and soil profile characteristics of Oregon lands occupied by three subspecies of Artemisia tridentata

The response of soils, streambanks and instream coliform bacteria levels to grazing management in a riparian area

Paired watershed ecological analysis

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