Catalog Search Results
Author
Series
CER volume 83/84-45
Pub. Date
1985.
Description
Equilibrium of alluvial streams has been thoroughly studied in the past century. Many investigators have extended analysis to explain meandering (or braiding) of streams, and attempted to describe the hydraulic geometry of alluvial streams. This study points at the derivation of the characteristics of alluvial streams from fundamental principles. More precisely, this research aims to determine the downstream geometry of alluvial streams (channel width,...
Author
Series
CER volume 80/81-46
Pub. Date
1981.
Description
An experimental study of techniques for modifying the surface shear stress, both mean and fluctuating, in turbulent boundary layers is reported. The surface shear along the test section of a 45.7 cm square wind tunnel, with a downstream expansion section, was determined by means of surface-hot-wire-heat-transfer-gauges. Turbulent boundary layers in both zero and adverse pressure gradients were evaluated.
Author
Series
CER volume 83/84-52
Pub. Date
1985.
Description
Soil erosion by rainfall is one of the major sources of sediments transported into streams. The physical processes governing rainfall erosion are very complex and no generally accepted sediment transport equation has been developed so far. Various approaches have been used in the past decades to analyze sediment transport by overland flow.
Author
Series
CER volume 85/86-17
Pub. Date
1985.
Description
This study is a continuation of the work to determine the point of incipient failure and other hydraulic characteristics of riprap for providing criteria for design of stable ripraps in flood control channels. Two sizes riprap materials were tested. One material had a d = 1.0 in. and the other had a d₅₀ = 2.0 in. Both riprap sizes had the ETL 1110-2-120 gradation recommended by WES.
Author
Series
CER volume 81/82-25
Pub. Date
1982.
Description
Visual and concentration measurements were made for a large number of continuous ground-level releases of heavy gases into a wind-tunnel boundary layer. These different plumes were not affected by any topographic or building wake influences. The experiments provided a broad coverage of the variable range of source gas specific gravity, source gas flow rate, and approach flow wind speed.
Author
Series
CER volume 74/75-5
Pub. Date
[1974]
Description
A simulated atmospheric boundary layer flow over the Renaissance Center model was established whose characteristics compared favorably with the expected flow over the Detroit area. Flow visualization showed fluctuating separation features at certain locations on the center hotel structure and on the elevator towers of office buildings suggesting high values of pressure coefficient in those regions.
Author
Series
CER volume 79-80
Pub. Date
1981.
Description
Accurate, quantitative analysis of ecosystems is dependent on the quality of data used to describe the environment. Data quality is a major concern for the Multi-resource Management Planning Research Project, referred to as the Beaver Creek Project, administered by the Rocky Mountain Forest and Range Experiment Station. The goals of the Beaver Creek Project are centered on development and testing of methodologies for management decision making in...
Author
Series
CER volume 80/81-45
Pub. Date
1981.
Description
Response of the flow variables to external driving forces is non-linear for shear flows. For the turbulent boundary layer case, surface shear stress fluctuations of magnitude as great as the mean value are observed. For flow near the surface Prandtl's turbulent boundary layer approach of employing averaged Reynolds equation and a turbulence closure model is insufficient to account for surf ace shear fluctuations. A model which incorporates a discrete...
Author
Series
CER volume 70-71JHN4
Pub. Date
1970.
Description
Analytical and numerical studies were made of single point moorings of a large disc buoy in deep water. Waves of different frequencies and winds of different magnitudes were imposed on moorings of different scopes for nylon ropes. The numerical model results compared favorably with analytical solutions for a straight vibrating string and the buoy motion was validated with the results from a hydraulic model study.
Author
Series
CER volume 81/82-1
Pub. Date
1981.
Description
Wind-tunnel transient concentration data were obtained from modeling tests which reproduced gaseous dispersion from five different forty cubic meter or less liquefied natural gas (LNG) spills performed at China Lake Naval Weapons Center. Comparisons in the transient concentration data between these modeled tests and the field tests indicated which parameters are dominant in the modeling process. Model tests which reproduced the wind shear and turbulence...
Author
Series
CER volume 68/69-16
Pub. Date
1968.
Description
This project was initiated July 1, 1964, to study the feasibility of recharging excess or flood waters to an unconfined aquifer. The study included the selection of a site; design, construction, and maintenance of structures; data collection, analysis, and economic evaluation of artificial recharge.
Series
Pub. Date
[1977]
Description
Rural transportation systems are of major importance to the nation's economy. Safety of rural bridges in many cases has deteriorated to a dangerous level rendering many avenues for the movement of goods and people to an unusable state. The recently developed glulam bridge system, composed of laminated stringers and deck fastened together by bolted and doweled connections, offers great potential in needed national bridge replacement programs.