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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:: showing Upper Amazon Creek watershed, WEW (study wetlands), and the three main tributaries 12 Flow chart

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

The effects of land use on stream nitrate concentrations : from the catchment scale to the regional scale

Creator:: Poor, Cara J.
Abstract:: This work furthers the understanding of processes occurring in catchments that affect stream nitrate concentrations using two different approaches: a temporally intensive case study of three headwater catchments with varying land use (through storm event monitoring) and a spatially intensive study on the regional scale (through statistical modeling) of 1st-4th...
Resource Type:: Dissertation
Full Text:: ................................................... 78 3.4 Chloride Modeling Results for Western Oregon using Land Use, TI, and Site Elevation

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

Creator:: Cone, Jarrold B.
Resource Type:: Undergraduate Thesis
Full Text:: County, Oregon s LAND-USE PROBLEMS OF TELE MIAMI RIVER DRAINAGE TILT,AMOO] CO1ThTY, OREGON by

Spatial patterns in land use and water quality in the Tillamook Bay Watershed : a GIS mapping project

Creator:: Strittholt, James R., Garono, Ralph J., and Frost, Pamela A.
Abstract:: No publishing date on piece.
Resource Type:: Technical Report
Full Text:: and Land Use Table 10. Modeled stream access by dairy animals within the study area. Watershed Cow

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:: is privately owned. Approximately 127 square miles of land in the watershed is urbanized, a great

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:: River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and

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 cover change along the Willamette River, Oregon

Creator:: Oetter, Doug Rudolph, 1962-
Abstract:: The Willamette River and its floodplain in northwest Oregon have changed dramatically since European settlement. At one time, the river was a vast complex system of braided channels with a broad floodplain forest; it has now been simplified by channelization and dams, and the forest has been removed to support...
Resource Type:: Dissertation

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

ScholarsArchive@OSU

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

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

The effects of land use on stream nitrate concentrations : from the catchment scale to the regional scale

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

Spatial patterns in land use and water quality in the Tillamook Bay Watershed : a GIS mapping project

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

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

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

Land cover change along the Willamette River, Oregon

Agricultural land use in the Tualatin Basin

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