Improvement of Nonlinear Rainfall-Runoff Model
Water resources engineers have long been aware that the linear assumption of unit hydrograph models produces poor results in some basins. The Amorocho-Branstetter nonlinear model is an...

Composite Masonry: Research Needs
Composite masonry walls (walls built of brick and concrete masonry units bonded so as to exert common action under load) have been used for decades. Until recently, the only method of...

Loads due to Drifted Snow
Roof failures due to snow loads are often the result of heavy drifts rather than uniform snow loads. Codes and standards such as Standard A58.1 of the American National Standards Institute...

Failure of an Anchored Bulkhead
An 800-ft (240 m) long anchored bulkhead with a height of 65 ft (20 m) was designed more or less in accord with published recommendations by several acknowledged experts. Nevertheless,...

Buckling of Stiffened Webs by Local Edge Loads
A finite strip method is used for analysing the buckling of longitudinally stiffened web plates subjected to transverse local edge loading. The probLem is of particular importance for...

Mutual Interference Drag on Signs and Luminaires
Wind tunnel tests were conducted to determine the increase in drag on flat plate and luminaire models due to the proximity of nearby models of like shape. Test results showed drag increases...

Structural Materials in Aerospace Applications
In the selection of materials for aerospace applications, consideration is given to factors, such as strength and weight, as well as to economics and energy requirements for both manufacture...

Ultimate Load Testing of Space Trusses
The results of tests to destruction of twelve space trusses are reviewed. The results cover model tests of 3' to 8' span and larger scale tests of 24'...

1980 Needs Survey: Combined Sewer Site Studies
The U.S. Environmental Protection Agency is mandated by the Clean Water Act to prepare and report to the Congress a biennial estimate of the construction cost for publicly owned wastewater...

Wastewater Treatment for Cold Regions
The objectives of wastewater treatment in cold regions have been dictated by guidelines and regulations established for other regions. The impact of this occurrence has been extremely...

Mathematical Model for Erodible Channels
A mathematical model for erodible channels is formulated, developed and tested with field data. A significant feature of the model is its ability to account for changes in both channel...

Marketing Design and Construction Services
A survey of approximately ninety of the largest domestic professional firms engaged in process engineering design and construction, and of eighty of the largest clients of those services,...

Flow Resistance in Wide Rectangular Channels
Friction coefficients are determined for rectangular channels over a wide range of Reynolds number and a range of width-to-depth ratios of 35 to 1. Comparison with other investigators...

Effluent in Trickle Irrigation of Cotton in Arid Zones
A trickle system was installed in a cotton field to study the effects of effluent quality, emitter discharge and irrigation regime on the yield of cotton. The experiments were conducted...

Thermal Plume Area Calculation
A simple formula for the surface area of a thermal plume is proposed, appropriate for application to a depth-limited surface discharge. The formula is based upon thermodynamic and kinematic...

Acoustic Techniques for Offshore Positioning
Acoustic positioning systems for accurately determining the location of a site, structure, or vessel in the ocean are described. The advantages of acoustic positioning systems over electromagnetic...

Piling in Frozen Ground
Recent construction in northern regions has emphasized the need for economical and reliable foundations, particularly in areas having permanently frozen ground. In many permafrost areas...

Gumbel's Extreme Value I Distribution: A New Look
Many basic hydrologic textbooks, following Gumbel's original work, advocate use of frequency factors dependent on an integer m for estimation of event levels using the Extreme...

Initial Conditions and Korteweg-de Vries Solitons
A study is made of the asymptotic waveforms described by the Korteweg-de Vries equation (ut + 6uux = uxxx...

Ultimate Strength of Arches with Bracing Systems
The ultimate load carrying capacity of bridge arches is investigated for the case where they fail by inelastic lateral instability associated with the flexural-torsional deformation of...

 

 

 

 

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