Index Catalog // ScholarsArchive@OSU

Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon

Creator:: Wolf, Donald W.
Abstract:: Human activities may contribute to the eutrophication of surface waters by providing nutrients to aquatic ecosystems. Phosphorus is frequently identified as a nutrient that is limiting to most aquatic ecosystems under natural conditions. Sources of phosphorus contributing to eutrophic conditions often include nonpoint sources that are dispersed across the landscape....
Resource Type:: Masters Thesis

Land use and nonpoint source phosphorus pollution in the Tualatin Basin, Oregon : a literature review

Creator:: Oregon State University. Extension Service, Oregon State University. Water Resources Research Institute, and Wolf, Donald W.
Abstract:: The Tualatin River Basin in Washington County, Oregon, is a complex area with highly developed agricultural, forestry, industrial, commercial, and residential activities. Population has grown in the past thirty years from fifty to over 270 thousand. Accompanying this population growth have been the associated increases in transportation, construction, and recreational...
Resource Type:: Technical Report
Full Text:: Nonpoin t Phosphorus Pollution in the Tualatin Basin, Oregon Oregon State University Extension Servic e

Oregon coastal lake study : phosphorus loading and water quality implications

Creator:: Blair, Michael Stuart
Abstract:: A study of phosphorus loading and water quality implications was conducted for the Oregon coastal lakes. The study was based on existing data for lake total phosphorus concentrations and for watershed land uses. A phosphorus mass-balance model was developed to predict lake total phosphorus concentrations from estimated phosphorus loading from...
Resource Type:: Masters Thesis
Full Text:: Oregon coastal lake study : phosphorus loading and water

Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon

Creator:: Cross, Timothy L., Wood, Mary, and Oregon State University. Water Resources Research Institute
Abstract:: About one-third of the land in the Tualatin Basin is used for agricultural production (Miner, Scott, and Wood, 1994). The variety of crops produced includes grains, specialty seeds, vegetables, fruits, berries, and nursery corps. Cattle and hog enterprises are the most prevalent livestock operations in the area (measured by number...
Resource Type:: Technical Report
Full Text:: Environmental Quality awarded a grant in 1992 to th e Oregon Water Resources Research Institute (OWRRI) at

Phosphorus physiology and environmental forcing of oceanic cyanobacteria, primarily Trichodesmium spp.

Creator:: White, Angelicque E.
Abstract:: The biological transformation of dinitrogen gas (N2) into combined forms(termed N2 fixation) by certain genera of oceanic cyanobacteria represents the largest incoming flux of nitrogen to the global ocean. As such, biological nitrogen fixation plays a significant role in the regulation of oceanic productivity and the export of carbon and...
Resource Type:: Dissertation
Full Text:: presented on September 28, 2006. Title: Phosphorus Physiology and Environmental Forcing of Oceanic

An Ecoregion-Based Reference Condition and Classification Scheme for Determining Nutrient Criteria in Oregon Lakes

Creator:: Brenner, Jacqueline M.
Abstract:: The anthropogenic introduction of nutrients to water bodies has been shown to alter the structure and function of natural aquatic ecosystems, yet national EPA lake and reservoir nutrient criteria remain too broad for effective regional water quality management. This study uses a reference site approach to propose numeric nutrient criteria...
Resource Type:: Masters Thesis
Full Text:: nitrogen (TN) and total phosphorus (TP) specifically applicable to lakes and reservoirs in Oregon. Oregon

Development of a mobile process to extract phosphorus from livestock wastes as a valuable fertilizer

Creator:: Hoilman, Gene
Abstract:: Environmental and regulatory concerns are causing confined animal feeding operations (CAFO's) to account for phosphorous content when applying wastewater to agricultural fields for disposal. In most cases this requires more land to spread the waste onto so that the phosphorous needs of the crop are not exceeded. A mobile process...
Resource Type:: Masters Thesis
Full Text:: mobile nutrient removal service economically viable. Several designs of on-site phosphorus removal

The agronomic, environmental, and economic implications of the introduction of terbacil for weed control in Oregon commercial peppermint operations

Creator:: Harris, James O.
Abstract:: The use of terbacil for weed control was adapted by a high percentage of Oregon peppermint growers soon after its introduction in 1967. To help clarify some of the implications of terbacil usage, three studies were undertaken to collect information concerning (a) the movement and build-up of terbacil in various...
Resource Type:: Masters Thesis
Full Text:: The agronomic, environmental, and economic implications

An analysis of two adjacent agricultural watersheds in west central Oregon

Creator:: Schoeneberger, Philip James
Abstract:: Two small adjacent watersheds on the west-central edge of the Willamette Valley of western Oregon were studied. Information was gathered on existing conditions to determine the suitability of the two watersheds for a paired-watershed study design. A soil survey was conducted using slightly modified soil series previously established for the...
Resource Type:: Masters Thesis
Full Text:: west central Oregon AN ABSTRACT OF THE THESIS OF Philip James Schoeneberger for the degree of

A biogeochemical study of manganese in the estuarine zone

Creator:: Flegal, Arthur Russell
Resource Type:: Dissertation
Full Text:: invertebrate fecal pellets of the Alsea River, Oregon, and 3) Phase transformations of manganese under

ScholarsArchive@OSU

Land use and nonpoint source phosphorus pollution in the Dairy-McKay hydrologic unit area of the Tualatin River Basin, Oregon

Land use and nonpoint source phosphorus pollution in the Tualatin Basin, Oregon : a literature review

Oregon coastal lake study : phosphorus loading and water quality implications

Estimated costs of reducing nonpoint phosphorus loads from agricultural land in the Tualatin Basin, Oregon

Phosphorus physiology and environmental forcing of oceanic cyanobacteria, primarily Trichodesmium spp.

An Ecoregion-Based Reference Condition and Classification Scheme for Determining Nutrient Criteria in Oregon Lakes

Development of a mobile process to extract phosphorus from livestock wastes as a valuable fertilizer

The agronomic, environmental, and economic implications of the introduction of terbacil for weed control in Oregon commercial peppermint operations

An analysis of two adjacent agricultural watersheds in west central Oregon

A biogeochemical study of manganese in the estuarine zone

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search