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...
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...
The problem of a fixed rectangular structure of unit width in a
train of simple harmonic normally-incident waves is modeled. The solution
allows for variable (1) length and draft of structure, (2) differing
depths in the three (fore, aft, and beneath the structure) distinct
regions, and (3) wave period. The...
The purpose of this study was to provide an understanding of the
interrelationships between fresh and salt water Circulation, tidal transport
and flushing patterns in the Chetco River estuary and its boat
basins.
Field work and water quality measurements were conducted at the
entrance of the Chetco River during 1975...
The dynamic response of an offshore structure to measured and simulated
stochastic wave forces is investigated. The theoretical nondeterministic
analysis is performed in the frequency domain for a two-dimensional
model. The ocean wave system is assumed to be a zero mean, stationary,
ergodic Gaussian process described by a one-dimensional wave...
Velocity measurements from drifter GPS records are assimilated and used in an ensemble-based inversion technique to extract the river bathymetry. The method is tested on a deep meandering reach and a shallow braided reach of the Kootenai River in Idaho, USA. The Regional Ocean Modeling System (ROMS) is used to...
Problems associated with quantification of deep water wave kinematics
and dynamics are examined. Summaries of Stokes' theory and Dean's
stream function theory are reported. A computer algorithm is developed
to solve the hydrodynamic characteristics for Stokes' fifth and third
order and linear theories. Tests are initiated to verify the results...
An experimental study was conducted to determine the hydrodynamic
forces on smooth and roughened circular cylinders as
influenced by a nearby plane boundary. The ambient flow was perpendicular
to the cylinder and parallel to the boundary. Measurements
were taken in a water channel and a wind tunnel to obtain the...
An analytical model is developed to examine the response and
efficiency of a vertical rigid, hinged, floating breakwater. The
boundary value problem describing the flow field yields a well-posed
Sturm-Liouville problem which is solved by separation of variables
for the velocity potentials. The equation of breakwater motion about
the breakwater...
By assuming the linear superposition principle to be valid, the
hydrodynamic forces on a horizontal cylinder under waves and current
are examined. In this study, towing a cylinder in waves is used to
simulate a cylinder under waves and current. The experimental
technique is proved valid through theoretical considerations and...