Typescript. Includes vita and abstract. Includes bibliographical references (leaves 367-382). Also available online in Scholars' Bank; and in ProQuest, free to University of Oregon users.

xii, 127 p. ： ill. (some col.) / I developed software to incorporate the FlamMap fire model into an agent-based model, Envision, to enable the exploration of relationships between wildfire, land use, climate change, and vegetation dynamics in the Willamette Valley. A dynamic-link library plug-in utilizing row-ordered compressed array lookup tables converts parameters between polygon-based Envision data and grid-based FlamMap data. Modeled fires are determined through Monte-Carlo draws against a set of possible fires by linking historic fire data to future climate projections. I used classification and regression tree (CART) and logistic regression to relate ignitions to human and land use factors in the Willamette Valley above the valley floor from 2000-2009. Both methods showed decreasing distance to major and minor roads as key factors that increase ignition probability for human ignitions but not for lightning ignitions. The resulting statistical model is implemented in the FlamMap plug-in to provide a dynamic ignition probability map over time. / Committee in charge: Dr. Bart Johnson， Co-Chair； Dr. Scott Bridgham ，Co-Chair； Dr. John Bolte； Member

This thesis examines how the pursuit of commercial gain affected the development of agriculture in western Oregon's Willamette, Umpqua, and Rogue River Valleys. The period of study begins when the British owned Hudson's Bay Company began to farm land in and around Fort Vancouver in 1825, and ends in 1861--during the time when agrarian settlement was beginning to expand east of the Cascade Mountains. Given that agriculture in Oregon, as elsewhere, would eventually reach a standard of national development, and given that most of Oregon's immigrants arrived poor and lacked the farm implements needed for subsistence, the question this study asks is what methods and motivations guided Oregon's first agrarian settlers to improve their industry? It is the central premise of this study that commerce was the sine qua non of agricultural development, and that commercial gain was the incentive that underpinned the improvements necessary to its progress. The question itself necessarily involves physiographical and climatological conditions, existing and potential markets, and a merchant class whose commercial motivations were beyond doubt. Two additional matters that weigh substantially through most of this paper need to be mentioned: First, because not all farmers were commercially-oriented, the focus is on individuals, including merchants, whose entrepreneurial activities contributed the most to agriculture; second, the discovery of gold in California in 1848, and in southern Oregon in the early 1850s, had a huge and lasting influence on Oregon agriculture and on the overall economy.