Index Catalog // ScholarsArchive@OSU

Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

Creator:: Bergen, Scott
Abstract:: The Amazon Tropical Rain Forest is the largest tropical rain forest system, comprising approximately 65% of such forests on earth. Since the 1960's, human populations in the Brazilian Amazon have increased from two to over 20 million. Concomitant urbanization, forest conversion, and economic dependence on resource extraction have exerted severe...
Resource Type:: Dissertation

Assessing cumulative influences of watershed-scale landuses on reed canarygrass (Phalaris arundinacea L.) abundance

Creator:: Inahara, Satomi
Abstract:: The West Eugene Wetlands, Eugene, Oregon, which provide habitat for number of endemic and endangered plant species, are currently threatened by a Reed canarygrass (Phalaris arundinacea L.) invasion. This study addresses the hypothesis that Phalaris spread can be explained in part by using watershed-scale landuse patterns as surrogates of the...
Resource Type:: Masters Thesis
Full Text:: Determination of a wetland watershed 24 4.4.3 Characterization of landuse/land cover (LULC) 25 TABLE OF

Land-use problems of the Miami River drainage Tillamook County, Oregon

Creator:: Cone, Jarrold B.
Resource Type:: Undergraduate Thesis
Full Text:: Land-use problems of the Miami River drainage Tillamook

Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed

Creator:: Nielson, Lisa M.
Abstract:: In July of 2001, the Environmental Protection Agency (EPA) activated the Total Maximum Daily Load (TMDLs) provisions of the Clean Water Act. As the first river in Oregon to implement TMDL regulations, people and agencies in the Tualatin basin face many challenges. Non-point source pollution affects water quality in the...
Resource Type:: Masters Thesis
Full Text:: SWCD Soil and Water Conservation District TMDL Total Maximum Daily Load TRWC Tualatin River Watershed

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

Agricultural land use in the Tualatin Basin

Creator:: Scott, Eric F., Wood, Mary, Warkentin, Benno P., and Oregon State University. Water Resources Research Institute
Abstract:: This report presents estimates of land uses, concentrating on agricultural land in the Tualatin drainage basin. Acreage in different crop groups and agricultural water use and distribution in the watershed were estimated. The total amounts of nitrogen and phosphate applied to agricultural land and the average loading of nutrients per...
Resource Type:: Technical Report
Full Text:: . LAND USE OVERVIE W A. Classificatio n The Tualatin watershed of approximately 450,000 acres includes

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Creator:: Floyd, William C.
Abstract:: The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and...
Resource Type:: Masters Thesis
Full Text:: of the river, with no emphasis on major reach or land use breaks. Preliminary results indicated that

Historical changes in anadromous fish habitat in the Upper Grande Ronde River, Oregon, 1941-1990

Creator:: McIntosh, Bruce A.
Abstract:: The U.S. Bureau of Fisheries (now National Marine Fisheries Service) conducted stream habitat surveys in the Upper Grande Ronde River Basin in 1941. This survey was part of an extensive inventory of stream habitat conditions for anadromous salmonids (Oncorhynchus spp.) throughout the Columbia River Basin. The survey systematically inventoried 158...
Resource Type:: Masters Thesis

An analysis of water quality data in Tualatin River tributaries with three different land uses

Creator:: Miner, J. Ronald, Scott, Eric F., and Oregon State University. Water Resources Research Institute
Abstract:: Water quality and stream flow data for tliree representative land uses in the Tualatin River Basin were evaluated to determine the comparative levels of various pollutants. In addition, the data were used in an effort to identify the extent to which observed concentrations of total and ortho phosphorus could be...
Resource Type:: Technical Report
Full Text:: of WATER QUALITY DATA in . TUALATIN RIVER TRIBUTARIES WITH THREE DIFFERENT LAND USES ' by J. Ronald

A spatially explicit method for determining the effects of watershed scale land use on stream conditions

Creator:: Kehmeier, Jonathan W.
Abstract:: The primary goal of this research was to identify the impacts that individual agricultural land uses have on fish communities in small streams located in the Willamette Valley of western Oregon. The diverse nature of the land use features of the valley provided a challenging but useful system for the...
Resource Type:: Masters Thesis
Full Text:: the Effects of Watershed Scale Land Use on Stream Conditions. Abstract approved: AN ABSTRACT OF THE

ScholarsArchive@OSU

Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

Assessing cumulative influences of watershed-scale landuses on reed canarygrass (Phalaris arundinacea L.) abundance

Land-use problems of the Miami River drainage Tillamook County, Oregon

Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed

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

Agricultural land use in the Tualatin Basin

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Historical changes in anadromous fish habitat in the Upper Grande Ronde River, Oregon, 1941-1990

An analysis of water quality data in Tualatin River tributaries with three different land uses

A spatially explicit method for determining the effects of watershed scale land use on stream conditions

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