The Decay of Turbulence in a Stratified Fluid

The Civil Engineer and the Decay of America's Infrastructure
With the infrastructure of the United States continuing to deteriorate, the problem becomes who will decide how much to spend in both repairing, maintaining and building new facilities...

Wave Decay Characteristics in Slowly Varying Depth

Design Approach to Dual-Power Aerated Lagoons
Completely- and partially-suspended lagoon cells are defined and their use in dual-power level, multicellular systems is discussed. A procedure is presented for the design of such systems...

Hydromechanics of Tidal Jets
A unified theoretical investigation of the fully-developed region of a tidal jet is presented. The jet is treated as a vertically-averaged flow and the effects of lateral mixing, bottom...

DO Model for Discharges from Deep Impoundments
A simple model is presented for the annual dissolved oxygen (DO) cycle of releases from the hypolimnion of deep impoundments. The model includes mathematical formulations and rate constants...

Decomposition of Solid Waste in Test Lysimeters
Eight test lysimeters containing 100-200 tons of refuse each were monitored for seven years for leachate and runoff rates, leachate and gas composition, refuse temperature, and surface...

Densification of Paper Mill Sludge Materials
Dewatered paper industry primary sludges have a consistency similar to very soft remolded clays. Densification involves removal of additional water, usually by placement of a surcharge...

Distribution of Toxic Substances in Rivers
A statistical technique was used to determine if hydrophobic organic substances have vertically a uniform distribution in a river. At a river polluted with chlorinated organic pesticides,...

Organic Carbon Decay in a Stream with Biofilm Kinetics

Civil Engineers Revitalize Ailing Inner-City Hospital
The reconstruction of the Cooper Medical Center in Camden, New Jersey, is described. The Medical facilities are part of the urban renewal plan for Camden. A unique feature of the project...

St. Louis, City on the Rebound, Willing to Try
Urban renewal plans in St. Louis have focused on giving incentives to private enterprise to develop inner city real estate for commercial, industrial, and residential use. The dollar volume...

Ignition Test for Soil Organic-Content Measurement
Problems with organic soils are often avoided by engineers because of uncertainties in organic-content measurement and lack of information on potential decomposition. High temperatures,...

Separated Flow Through Large Sudden Expansions
Flow patterns for large, sudden expansions have been obtained experimentally. The experimental studies reveal that flow patterns for large expansions are highly asymmetric and unsteady....

Convection Limited Sorption Kinetics in Packed Beds
If the rate capacity of sorbent particles to sorb exceeds the bulk convection rate of sorbate to those particles, then the latter mechanism is rate controlling. In a continuous flow packed...

Cost Optimization of Buildings
The methodology consists of the decomposition of the overall building design problem into a series of problems, one for each building subsystem, e.g., foundation, structure, roofing. The...

Kinetics of Pure Oxygen Activated Sludge
No difference in the pertinent kinetic parameters has been found in experiments comparing two activated sludge systems one aerated by air and the other by pure oxygen. The kinetic parameters...

Response of MDOF Systems to Nonstationary Random Excitation
Responses of linear, dynamic systems to nonstationary random excitation are calculated using a state formulation. Analytical expressions for evolutionary covariance matrices are derived...

Methane Migration Around Sanitary Landfills
Mathematical models have been developed to predict methane migration around sanitary landfills. The methane gas that is generated during the decomposition of refuse constitutes an explosion...

Decomposition in Optimum Structural Design
A general method for optimal elastic design of indeterminate structures by decomposition of the structure into separate subproblems is proposed. Both stiffness and flexibility method formulations...

 

 

 

 

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