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2006

Dissertations and Theses

Linear free energy relationship

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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 ...