A log step develops when large woody debris extends across the active
channel, creating a change in the water surface elevation as the stream
spills over the log step. By forming a series of vertical falls, log
steps reduce the amount of potential energy available for conversion to
kinetic energy...
Hart Mountain is a basaltic fault block mountain
in the semi-desert region of the northern Basin and Range
province in south-central Oregon. Geomorphic processes
associated with lingering snowpatches have formed nivation
hollows, which are small scale depressions in the hillsides.
The lingering snow in the hollows prohibits shrub
growth. Bedrock...
A hierarchical approach to the assessment of wind power site potential
at Prairie Peak, Oregon, is evaluated. Maps, aerial photographs,
and terrestrial photographs are utilized. Data are derived from photographs
of wind flagged trees with the aid of an interactive computer
program. The technique produces a map of isotachs, lines...
A slide inventory was conducted for a small watershed
in the northern Oregon Coast Range. Data on geology,
topography and climate were used to evaluate land stability
in the Moss Creek basin. As expected, a strong correlation
with slope steepness was shown. In addition, failures
predominantly occurred on slopes with...
The Lawrence Memorial Grassland Preserve, located in
Wasco County, Oregon, exhibits a wide variety of soil mounds and
patterned ground features. The size, shape, and distribution of
several elements of this peculiar landscape were analyzed with a
detailed map, field observations, and statistical procedures.
Common soil mound shapes are circular,...
This report describes the latest in a series of studies sponsored by the Nationwide Forestry Applications Program. Each such study has attempted to enhance the interpretability of remotely-sensed imagery. In this case the image type of specific interest is high-altitude color infrared (CIR) photography. This is a resource management tool...
The semantic differential technique was used to
quantify four interest groups' perceptions of twenty-six
Alaskan scenes. The scenes represented both panoramic views
and views of Mount McKinley from different sites in southcentral
Alaska. The perceptions were measured on six semantic
scales ("ugly-beautiful", "dislike-like", "unpleasantpleasant",
"unstimulating-stimulating", "level-mountainous",
and 'monotonous-varied"), and the...
The focus of this study was to examine and record
the physical changes brought about by the breaching of the
Siltcoos Foredune. The origin of the dunes and the physical
processes that operate there must be considered before
effects due to the breach can be studied. A series of field...
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...
Pleistocene glaciation in the upper elevations of the
Western Cascade Mountains took two characteristic forms: cirque and
valley glaciers. Field observations in the Neal Creek and Thomas
Creek drainage areas of Snow Peak provide evidence of three glacial
advances. Glacial landforms in the Neal Creek Valley are dominated
by a...
