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Oxygen Demand Trends, Land Cover Change, And Water Quality Management For An Urbanizing Oregon Watershed, Michael Karl Boeder Jan 2006

Oxygen Demand Trends, Land Cover Change, And Water Quality Management For An Urbanizing Oregon Watershed, Michael Karl Boeder

Dissertations and Theses

In-stream aquatic habitat depends on adequate levels of dissolved oxygen. Human alteration of the landscape has an extensive influence on the biogeochemical processes that drive oxygen cycling in streams. Historic datasets allow researchers to track trends in chemical parameters concomitant with urbanization, while land cover change analysis allows researchers to identify linkages between water quality trends and landscape change.

Using the Seasonal Kendall's test, I examined water quality trends in oxygen demand variables during the mid-1990s to 2003, for twelve sites in the Rock Creek sub-watershed of the Tualatin River, northwest Oregon. Significant trends occurred in each parameter. Dissolved ...


Lives, Livelihoods, And Landscapes: A Study Of Land Use And Social Change In Northeastern Nepal, Jennifer Leigh Anderson Jan 2006

Lives, Livelihoods, And Landscapes: A Study Of Land Use And Social Change In Northeastern Nepal, Jennifer Leigh Anderson

Dissertations and Theses

This thesis explores the forces of change in lives and landscapes that have altered the Lamosangu-to-Everest route in northeastern Nepal and shows how a transect in photographs and conversations across the east-central Himalaya allows us insight and a greater understanding into the processes and consequences of this change.

Three forces of change over the last twenty-five years dominated discussions with local informants: the rise of the "People's War"-Nepal's Maoist Insurgency beginning in 1996; the Democratic Revolution of 1990; and dependence on tourism for livelihood after the establishment of Sagarmatha National Park in 1976. Understanding the cultural-historical context ...


Deer-Vehicle Accident Hotspots In Northwest Clackamas County, Oregon, Linda K. Anderson Jan 2006

Deer-Vehicle Accident Hotspots In Northwest Clackamas County, Oregon, Linda K. Anderson

Dissertations and Theses

Road-kill of wildlife is common on Portland, Oregon's suburban fringe where development has increased road densities and traffic volume in rural areas. I identify the spatial and temporal patterns of black-tailed deer (Odocoileus hemionus columbianus) deer-vehicle accidents (DVA) at the suburban/rural interface of developing northwest Clackamas County using deer carcass pickup reports for county maintained roads for 1997-2004 and Oregon Department of Transportation deer-vehicle accident reports for 1996-2004. No black-tailed deer DVA models exist in the literature.

DVA increased 121% from 1997 to 1999 followed by a 26% decline by 2004. The initial DVA increase appears related to ...