Application of Weakly Compressible Flow Method to 2-D Open Channel Flows
The depth averaged equations for open channel flows are shown to be similar to that of the weakly compressible flows. The finite volume scheme developed for weakly compressible flows has...
River Sediment Discharge Study?San Diego Region
Procedures and general results are presented of a recent study performed to estimate the average annual sediment delivery (sand sizes and larger) from sources discharging to the southern...
Major Sedimentation Activities in the Soil Conservation Service
The Agricultural Research Service (ARS) and Soil Conservation Service (SCS) are cooperating in the development of tools to improve prediction of the magnitude of erosion processes, the...
Sediment and Aquatic Habitat Associations in River Systems
This paper results from the Task Committee's effort to summarize knowledge linking sediment transport and aquatic ecology. This paper presents one element of this work: the...
Sediment Transport, Hydraulic Retention Devices, and Aquatic Habitat in Sand-Bed Channels
Streams and rivers of all sizes and in all parts of the United States flow on sand-bed channels. Scour, Transport, and deposition of sediments particles are natural processes in these...
Delineation of Ordinary High Water
'Ordinary high water' is used in a court of law to delineate the extent of land ownership of adjacent riparian owners on navigable rivers. The most appropriate...
Sacramento's Proactive Stormwater Permit Program
In January 1990, with the encouragement and assistance of the California Regional Water Quality Control Board-Central Valley Region (Regional Board), the City and County of Sacramento,...
Slurry Removal From a 2-D Fluidized Region
A two-dimensional fluidization experiment is performed on fine sand with a 5.08 cm diameter source pipe with horizontally opposed orifices, 0.317 cm in diameter, spaced 5.08 cm. Slurry...
Landfill Liner Quality
Landfill liners are being made with new synthetic materials, materials which may be beyond the knowledge of the engineer in charge of the landfill construction project. Engineers need...
Advances in Pipeline Materials
Pipelines transport water, storm run-off, process wastes, petroleum, natural gas, slurries, solids, sewage, steam and other fluids either by gravity or under pressure. Pipelines are also...
Selection of Hole Size for Fluidization Pipes
Two-dimensional fluidization experiments are performed on fine and medium coarse quartz sands at depths of 25.4 and 42 cm. Four supply pipes are used with orifice diameters of 1.587 mm...
U.S. Construction Aggregates
Crushed stone and sand and gravel are the two main sources of natural construction aggregates in the United States as well as in the world. At the beginning of the 20th century, the production...
Long-Term Strength Gain or High Strength Concrete as Monitored by Drilled Cores
An evaluation was made of the relationship between standard cylinders, four-inch by eight-inch cylinders, and drilled cores. The evaluation results showed that the strengths obtained from...
Heat Development and In-Situ Strength of Large Diameter Caissons Made with High-Strength Concrete
The test program essentially consisted of casting two prototype caissons using two different high-strength concretes, measuring internal caisson and adjacent soil temperatures, extracting...
Evaluation of Factors Affecting High-Strength Concrete Cores
A number of factors are discussed to explain different effects they have on core strength. These factors should be considered when evaluating cores tested to determine 'true'...
Compressive Strength Relationship Between Cylinder Tests and Core Tests
A core obtained from any field cured structural member will be inherently different than the field cured cylinder used as a control. Consequently, comparisons with field cured cylinders...
Maturity and Pullout for High-Strength Concrete
As with other types of concrete mixtures, construction with high-strength concrete requires assurance that sufficient levels of in-place strength are reached at specific times. An experimental...
Applications of X-Ray Imaging in Soil Mechanics
This paper presents a summary of the principles of methods to observe the detailed patterns of local deformation within a soil mass: stereophotogrammetry, polaroscopy, infrared tomography...
Development of a Plane-Strain Device for Soft Rock
Work is now in progress to build a plane-strain apparatus for 'soft' (unconfined compressive strenghts below 35 MPa) rock and concrete, based upon a passive,...
Combined Compression-Shear Experiments on Mortar-Aggregate Interfaces
Material interfaces between matrix and aggregate particles in cementitious composites such as concrete are considered to be a very important component of the material microstructure, which...
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