Sponsor
Portland State University. Department of Geography
First Advisor
Daniel M. Johnson
Term of Graduation
Fall 1987
Date of Publication
10-20-1987
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Geography
Department
Geography
Language
English
Subjects
Hydrology -- Oregon, Lake ecology -- Oregon
DOI
10.15760/etd.5596
Physical Description
1 online resource (v, 112 pages)
Abstract
Natural lake-watershed ecosystems in Oregon compose a diverse and valuable assemblage of land and water resources. With an increasing demand on lakes for recreation, water supplies, and aesthetic values and an increase in available data on Oregon lake systems, there is a need for applicable and timely scientific water management information about lake conditions statewide. This thesis is an attempt to summarize some of the data collected on natural Oregon lake-watershed ecosystems.
The purpose of the thesis is to identify the most typical natural systems out of an initial data base of twenty-four variables, measured over ninety-eight lake-watershed ecosystems. The selected variables are reduced to five common factors using principal components factor analysis. K-means cluster analysis is used to create similar groups of lake systems. These groups are compared to ecoregions in Oregon and a typical, representative lake ecosystem is identified for each group. Results show that several lake systems of the state are unique.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
http://archives.pdx.edu/ds/psu/20957
Recommended Citation
Jones, Randall Alan, "Classifying Oregon Lake-Watershed Ecosystems for Regional Water Resources Assessment" (1987). Dissertations and Theses. Paper 3712.
https://doi.org/10.15760/etd.5596
Comments
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