Composition and structure of Oregon ash
(Fraxinus latifolia) woodlands in the William L. Finley
National Wildlife Refuge, Oregon are described. Twenty
stands dominated by Fraxinus latifolia were sampled with
500 m2 circular macroplots in which floristic microplot
data were collected for plant community synthesis. Plant
communities were identified by computer-assisted...
The present day vegetation pattern of the Willamette Valley is a result of a long past of human alteration of the landscape. Beginning with aboriginal burning of the grasslands to present day land uses, the vegetation of the valley has been affected by anthropogenic activity. Wet prairie is a vanishing...
This study examines the relationships among variables influencing
solar access in the Portland-Vancouver Metropolitan Area. The
analysis is based on a random sample of approximately 400 single-family
homes in 21 local jurisdictions outside the city limits of Portland.
Relationships between percentage of available sunlight and selected
variables were examined by...
The dramatic upsurge of contract-supported archaeological activity,
generated by legislative action, has precipitated an increase
in information about Oregon's prehistoric peoples. This information,
however, has not been presented in a format which can be easily
understood by the general public.
This study presents an account of early peoples in Oregon,...
The aggregate industry is responsible for the extraction and production of crushed stone, sand, and gravel— the literal building blocks of our society. Across the U.S. there are tens of thousands of quarries and sand and gravel pits, the majority of which are left abandoned or with minimal reclamation efforts....
The Willamette River Basin, Oregon, viewed in terms of a cultural-ecological system, has been subject to three phases of cultural development: hunting and gathering, agrarian, and industrial-urban. Each population base has employed a technology to exploit the environment to the extent that its patterns of culture would allow. This technology...
In 2001, an extreme drought tightened water supply in the Upper Klamath Basin (basin) while earlier increases in Endangered Species Act (ESA) water requirements for basin fish species that same year elevated demands. The Bureau of Reclamation (Reclamation), which manages irrigation water in parts of the basin located near the...
Temporal and spatial patterns of daytime cloudiness in the
Willamette Valley of Oregon were studied by utilizing monthly and
daily sky cover data published by the U. S. Weather Bureau for the
Portland, Salem, and Eugene stations. The 15-year period, 1949
through 1963, was selected as the maximum reliable period...
A photographic band-ratioing technique was investigated.
The data source consisted of 70 mm Landsat Multispectral Scanner
(MSS) negatives. The process would require combining registered
positive and negative transparencies to achieve a ratio
modulation in the resulting print. This would also require
compensation for atmospheric effects on the original negatives by...
The study of the interactions between man and his environment is the eminent domain of the geographer. An excellent example of this kind of study is the urbanization of a formerly rural town on the urban-rural fringe. The area in this instance is Tualatin, Oregon, with the focus on the...
