Predatory lionfishes (Pterois volitans and P. miles) were introduced to Florida waters during the mid to late 1980s, and eventually established self-sustaining breeding populations in the tropical western Atlantic. These invasive species are now widespread along the southeastern seaboard of the United States, across the Caribbean Sea, and in the...
Elliptical borehole enlargements or "breakouts" caused by systematic spalling of a
borehole wall due to regional maximum horizontal stresses were identified in 18 wells
drilled in the Coast Range and Willamette Valley of western Oregon. The breakouts
generally indicate a NNW to NNE orientation of maximum horizontal compression
(oH[subscript max])...
Channel evolution and influences of changing floodplain
characteristics, heterogenous bank materials, and altered flow regimes were
examined along the Willamette River, a large alluvial river in northwestern
Oregon. The Willamette River is composed of a series of geomorphically
diverse reaches, which have each evolved uniquely in the century following
Euro-American...
A technique was developed in the present study to determine
fault-plane solutions for small earthquakes. The method uses the
direction and amplitude of initial P-wave motions recorded at a
small number of seismic stations for epicentral distances less than
2000 km.
Seismic arrivals recorded on short-period seismograms were
identified as...
How does transboundary water cooperation begin at the initial stages? Countries in many transboundary basins either do not cooperate at all or have ceased cooperation altogether. Yet cooperation does often prevail, resulting in 688 water-related treaties signed between 1820 and 2007. The question we address here is, by which practices...
After the April 2010 explosion on the Deepwater Horizon oil rig, and subsequent release of millions of barrels of oil, two Corexit oil dispersant formulations were used in unprecedented quantities both on the surface and sub-surface of the Gulf of Mexico. Although the dispersant formulations contain four classes of surfactants,...
Purpose – The purpose of this article is to communicate how an academic library can establish and implement a realignment process to prepare itself to serve users in the 21st century.
Design/methodology/approach – The authors employed a case study approach to present the challenges of realigning an academic library. They...
Volcan Aucanquilcha, a Pleistocene to Recent composite volcano in northern Chile, is the
youngest and center-most member of the 11 m.y.-old Aucanquilcha Volcanic Cluster (AVC). The
AVC has produced [approximately]350 km³ of lava over its history. Magmatism started slowly and was punctuated
by high rates of eruption between 4.5 and...
The North Unit irrigation District of Central Oregon,
a water project developed under the guidelines of the
Bureau of Reclamation, is characterized by limited water
and the need for efficient utilization and control of the
irrigation system. To manage the limited water resource,
irrigators need a timely and economical method...
The objectives of this study were: 1) to identify and map the
experimental area of Meadow Creek watershed by existing vegetation,
and 2) to identify and map the experimental area of Meadow Creek
watershed by habitat types. The classification system adopted for
this study was based on the habitat type...