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Dissertation/Thesis Abstract

Identifying Clusters of Non-Farm Activity within Exclusive Farm Use Zones in the Northern Willamette Valley
by Chun, Nicholas, M.U.S., Portland State University, 2017, 79; 10600978
Abstract (Summary)

This thesis provides an extensive look at where permitted non-farm uses and dwellings have clustered within Exclusive Farm Use (EFU) zones in the Northern Willamette Valley in Oregon. There is a looming concern that non-farm related uses and dwellings, or non-farm development, are conflicting with agricultural preservation strategies. Specifically, non-farm developments can potentially undermine the critical mass of farmland needed to keep the agricultural economy sustainable, but until now, studies have lacked spatially precise data to systematically track these phenomena. This thesis offers methodological contributions towards analyzing these operations and presents a broad account of what has been occurring in the region. Using permit approval data from the Department of Land Conservation and Development (DLCD) and 2015 county tax lot shapefiles, I geocoded the locations of these uses and dwellings. I used location quotient and spatial autocorrelation coefficients to identify non-farm hotspots in the region and summarized different typologies that have developed. The findings reveal that viticulture operations have amassed near Dundee and Newberg in Yamhill County, while commercial activities and home occupations have clustered near the Salem-Keizer UGB. Concurrently, dwellings have clustered near the Yamhill-Polk County border. Finally, I offer suggestions to improve Oregon’s agricultural land use policy and data management process, as well as advocate for more intensive research in the future to generate narratives for our results.

Indexing (document details)
Advisor: Horst, Megan A.
Commitee: Banis, David, McClintock, Nathan
School: Portland State University
Department: Urban Studies
School Location: United States -- Oregon
Source: MAI 57/01M(E), Masters Abstracts International
Subjects: Geography, Geographic information science, Agriculture
Keywords: Critical mass, EFU, GIS, Non-farn development, Oregon, Willamette Valley
Publication Number: 10600978
ISBN: 978-0-355-36784-3
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