Results
526 - 550 of 881 Items << < 17 18 19 20 21 22 23 24 25 26 > >>
526 - 550 of 881 Items << < 17 18 19 20 21 22 23 24 25 26 > >>
|
The relief model of the Upper Colorado River Basin, pictured above, was constructed by the Upper Colorado River Commission in cooperation with the Babson Institute of Business Administration. This model shows the topographic features of the area...
2008-12-01
|
|
6,300 acres of project lands. Drainage facilities will also be built.
Flood control and fish and wildlife values will be improved. The
proj ect includes 6,300 acres of new land and 12,650 acres of presently
irrigated land needing a supplemental...
2008-11-01
|
|
Climate change is arguably the greatest challenge to conservation of our time. Most
vulnerability assessments rely on past and current species distributions to predict
future persistence but ignore species’ abilities to disperse through...
2014-02 (iso8601)
|
|
A survey of the Brothers caldera volcano (Kermadec arc) with the autonomous underwater vehicle ABE has revealed new details of the morphology and structure of this submarine frontal arc caldera and the geologic setting of its hydrothermal...
2012-12 (iso8601)
|
|
Coastal foredunes protect lives, infrastructure, and ecosystems during severe storms. A range of
approaches, ranging from simple (e.g., geometric) to complex (e.g., process-based) predictive
models, have been developed to quantify overtopping and...
2014-11 (iso8601)
|
|
Eddy detection and tracking algorithms are applied to both satellite altimetry and a
high‐resolution (dx = 5 km) climatological model solution of the U.S. West Coast to study
the properties of surface and undercurrent eddies in the California...
2011-08-25 (iso8601)
|
|
Magnetic and gravity modelling was completed along two E-W transects offshore central Oregon. These models indicate that the backstop-forming western edge of the Siletz terrane has a seaward dip of approximately 40° to 49° at 44°48'N, shallowing...
1996-12-12 (iso8601)
|
|
The application of a generalized inverse approach for assimilating vessel-mounted acoustic Doppler current profiler (VM-ADCP) data into numerical solutions of barotropic tides is described. The derived estimates of tidal currents can be used to...
2005-06 (iso8601)
|
|
Using a linear quasi-geostrophic model of large scale spiraling flow and vertical density
gradient in the eastern North Pacific, we evaluate the complex dispersion relationships
for quasi-geostrophic waves. Our calculations indicate that the...
1987-05-04 (iso8601)
|
|
The High Lava Plains province (HLP) is a late Cenozoic bimodal volcanic field at
the northern margin of the Basin and Range province in southeastern Oregon that hosts
a westward younging trend of silicic volcanism that crudely mirrors...
2004-10-05 (iso8601)
|
|
Satellite-derived data provide the temporal means and seasonal and nonseasonal
variability of four physical and biological parameters off Oregon and Washington
(41°–48.5°N). Eight years of data (1998–2005) are available for surface chlorophyll...
2008 (iso8601)
|
|
We use Ar-40-Ar-39 incremental heating to fingerprint bulk fluvial sediment entering the northeast Pacific Ocean, with the long-term intent of tracking sediment source and transport changes from the terrestrial system to the marine environment...
2006-12-27 (iso8601)
|
|
The historical function of fire in sagebrush steppe has been altered by 19th century
overgrazing, active fire suppression, annual grass invasion and encroachment of woody
species. The significance of fire to these systems is known, but research...
2015-04-28 (iso8601)
|
|
The Late Spring Secondary Precipitation Maximum in the
Interior Pacific Northwest results from a complex system of climatic
controls. The Secondary Maximum is most strongly developed over the
high plateau of Oregon immediately in the lee of the...
1976-08-16 (iso8601)
|
|
Ecological factors associated with the relictual distribution of
the endemic shrub Kalmiopsis leachiana (Ericaceae) were investigated.
A prostrate evergreen species with small coriaceous leaves,
K. leachiana is restricted to two disjunct...
1977-12-08 (iso8601)
|
|
Landslides are ubiquitous within the state of Oregon, imposing an annual estimated cost of more than $10 million. Weak, saturated soils at steep slopes combined with persistent rainfall throughout most of the year provide a dangerous environment...
2013-05-23 (iso8601)
|
|
The Queen Charlotte Fault system is a segment of the North America - Pacific
plate boundary. From 45 Ma - 5 Ma, plate motion has been primarily translational.
Since 5 Ma, transpression has been the dominant mode of interaction. The plate
boundary...
1997-05-29 (iso8601)
|
|
Alaska encompasses several climate types because of its vast size, high-latitude location, proximity to oceans, and complex topography. There is a great need to understand how climate varies regionally for climatic research and forecasting...
2012-07 (iso8601)
|
|
A method was developed for assessing the vulnerability
of groundwater to contamination from contaminant sources
at the soil surface, using a numerical groundwater flow
model linked to a digital map database. The method was
applied using the...
1988-11-07 (iso8601)
|
|
A feral pig population on Santa Catalina Island, California, was
studied for 17 months beginning in July 1980. Density was estimated
to be 21 to 34 pigs/km² (95% confidence interval) using capture-recapture
techniques. Dry season home ranges...
1985-05-01 (iso8601)
|
|
Approximately 1600 km of seismic reflection profiles from the
eastern Salt Range and Potwar Plateau (SR/PP) of Pakistan are
integrated with available magnetostratigraphic, surface geologic and
well data, to categorize structural styles, determine...
1988-02-09 (iso8601)
|
|
Large woody debris recruitment to streams from adjacent riparian forests influences stream
channel morphology, sediment routing, and fish habitat. A mathematical model was developed
to 1) determine whether the trees in a stand adjacent to a...
1997-12-25 (iso8601)
|
|
Numerous studies have demonstrated that vegetation canopies affect snow
accumulation and ablation processes. In addition, estimates of remotely sensed snow
covered area can be biased by the presence of an overlying vegetation canopy.
Consequently,...
2005-11-11 (iso8601)
|
|
The age, or residence time of water is a fundamental descriptor of catchment hydrology,
revealing information about the storage, flow pathways and source of water in a single
integrated measure. While there has been tremendous recent interest in...
2004-09-24 (iso8601)
|
