Modeling Erosion and Deposition Due to Suction and Jet Flows
PHOENICS, a commercial 3-D computational fluid dynamics software package, was modified for simulating seabed erosion and deposition. Time varying sediment fluidization, transport and deposition...

Unconventional Rubble-Mound Breakwaters—Concerns
A Seminar on Unconventional Rubble-Mound Breakwaters was held in Ottawa, Canada, on the 15th and 16th of September 1987. This paper is an attempt to summarize the general discussion that...

Recovery Efficiency From Single-Well Injection/Recovery Tests in a Limestone Aquifer of High Secondary Porosity
An analytical advection-diffusion model was developed to assess the feasibility of injecting and recovering water in a limestone aquifer of high secondary porosity. The model was calibrated...

Laboratory and Field Determined Seepage (abstract)
In order to obtain quick and reliable estimates of seepage, an attempt was made to establish a relationship between one or more of the properties of concrete canal lining and seepage....

Microsilica Concrete: Properties and Applications
With the advent of microsilica concrete, a new generation of high to ultra high strength and high durability concretes have become commercially feasible and are now being specified and...

Constitutive Theories for Solids with Defective Microstructure
The nonlinear mechanical response of solids is a macroscopic manifestation of the irreversible changes in its microstructure. The most common modes of the irreversible microstructural...

Sand Compaction in Cyclic Shear—A Statistical Model

Breakout Theory for Offshore Structures Seated on Sea-Bed

Seabees in Service

Measurement of Porosity in Natural Sand Desposits
The proposed technique enables porosity measurement to be made on undisturbed samples taken from sand deposits. It is based on the impregnation and hardening of sand in the field and the...

Land Imprinting for Better Watershed Management

Mass Transport in Regional Groundwater Basins

Effect of Intragranular Porosity on Compaction
The variation in intragranular porosity of limestones often does not allow the specified compaction standards to be fulfilled. The problem has caused embarrassment to engineers and loss...

Optimum Backwashing of Sand Filters
A fundamental theoretical and experimental study of backwashing is presented showing that backwashing with water alone is an inherently weak process because of the absence of particle...

Drainage Rates and Water-Table Depths
Precipitation and evapotranspiration data for 27 years from three stations in the Ottawa and St. Lawrence Lowlands have been used together with a hydrologic model of the drainage process...

Effect of Leaching Fraction on River Salinity
The effects of 0.10 and 0.40 irrigation leaching fraction management on amounts of salt precipitated in the soil and river channel and compositions of drainage and river water have been...

Heterogeneity and Porosity Effects on Response of Geo-Materials

Load-Induced Strains in Hardened Cement Paste
As an initial stage in a more fundamental and flexible approach to the prediction of load-induced dimensional changes in concrete the elasticity and creep of hardened cement paste were...

Discharge and Travel Time for Ground-Water Conduits
A system of mathematical and graphical procedures gives solution for the steady-flow discharge and travel time for nonuniform confined ground-water conduits in which any or all of the...

Factors Affecting Coefficient of Earth Pressure Ko
The coefficient of earth pressure at rest can be accurately determined by conducting constant stress ratio tests in the triaxial apparatus (interpolation method). This method is stress...

 

 

 

 

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