Predetermining the ultimate capacity of piles driven into purely
cohesive soils and purely cohesionless soils involves, respectively,
the consideration of soil shear strength in a completely undrained and
a completely drained condition. For the intermediate cases concerning
soils that possess both cohesion and internal friction (silts, clayey
silts, sandy clays,...
The results of three hydraulic model tests to evaluate the stability
of a placed stone breakwater are presented and discussed. The prototype
breakwater was designed to protect offshore power and port facilities in
60 feet of water and was tested at scale ratios of 1:10, 1:20, and 1:100.
The armor...
Plate loading tests in rock are deceptively simple tests to perform.
Consequently, many varieties have been developed in the past
60 years. From each of the varieties various investigators have added
their own developments and modifications, some good, and some not so
good. The result has been a confusion of...
The development of a pavement management system for low-volume roads is a difficult task. There are many interrelated activities that must be considered, such as planning, design, construction, maintenance, and pavement evaluation. This paper addresses the evaluation and maintenance components of a pavement management system for low-volume roadways and provides...
A problem confronting the Corps of Engineers and other water resources planners in the Pacific Northwest is the prediction of anadromous fish enhancement benefits that would result from a proposed high dam project. These benefits are expected from augmenting natural streamflows with relatively cold reservoir withdrawals. The resulting increased streamflows...
The concept of placing high strength linear reinforcements in a
soil backfill to produce a vertical retaining structure is a recent idea
that has been applied with success at a number of locations. Rational
procedures have been developed for the design of these structures
when the reinforcements consist of long...
This thesis presents a procedure to identify and evaluate forest
arterial and collector networks. The procedure identifies those
decision criteria important in evaluating both the arterial and
collector networks and the specific facilities identified on these
networks. The procedure incorporates the decision criteria and results
from network and facility analysis...
Waters of various salinities were secured from the Umpqua
estuary, the Umpqua River, and the open ocean near the mouth of the
estuary. The rate of oxidation of sulfides in these various waters
was investigated to assess the potential longevity of free sulfides in
estuarine waters.
The rate of disappearance...
Aerial photography provides a method of analyzing dispersion
of wastes that are discharged into the ocean. This method is more
comprehensive than conventional boat sampling in dispersion studies.
The photographic technique permits waste concentrations to be
measured throughout the plume in one instant; thereby allowing the
diffusion analysis to be...
Aerial photography has become a valuable method of acquiring
information on estuarine current circulation patterns. The method
provides a comprehensive picture of nearly simultaneous surface
water movements. It represents a significant improvement over
conventional surface float and current meter methods because large
areas may be covered in great detail with...