Ocean Energy
The Ocean Thermal Energy Conversion (OTEC) component nominated this year as an ASCE Outstanding Civil Engineering Achievement involves the most critical design problem; the cold water...
Weather Modification Potential ? Santa Clara Valley
Santa Clara County of California has been a water deficient area. The Santa Clara Valley Water District has an obligation to the community and to the other water users in the State to...
Surface Runoff Water Quality from Contaminated Dredged Material Placed Upland
Bioassay and associated tests have been developed and are being refined to assist in the evaluation of the environmental impact of dredged material disposal alternatives. Simulated rainfall-surface...
Effects of Fines in Gravel Bed Streams Behavior
A model-gravel bed stream is studied in the laboratory. Flow visualization of bedload motion correlates with bursting phenomena near the bed. The bedload variation as a result of the addition...
Overtopping of Flood Control Levees and Floodwalls
The risk of overtopping can be significant for flood control levees or floodwalls, and the consequences can be costly and potentially catastrophic. Designs using superiority can force...
Accurate Computation of Nonlinear Advection
Advection, the transport of a quantity by the mean velocity, is a process which appears in virtually all equations of free-surface hydraulics. The demonstrated accuracy and efficiency...
Higher-Order Methods for Transient Free-Surface Flows
One-dimensional transient free-surface flows in open channels are described by a set of quasi-linear hyperbolic partial differential equations, called the Saint-Venant equations. Numerical...
Predicting Ground-Water Drainage to Surface Mines
A two-dimensional, finite-difference numerical model is used to simulate the drainage of ground water into a surface coal mine. Graphs of dimensionless head as a function of dimensionless...
Hydraulics and Hydrology of Border Irrigation
Proper description of the hydraulics of irrigation of farmland is necessary in management. Many descriptions of furrow or border irrigation are not adequate to describe truly physically...
Thermal Breakup Predictions on a Regulated River
The thermal breakup process which occurs on the Peace River in Alberta, Canada is described. A quantitative technique which uses the energy budget to explain the celerity of the breakup...
Recreational Freshwater Embayment Design for Acceptable Water Quality
Combined field and laboratory studies were used to relate water quality, geometry, and exchange characteristics in reservoir swim embayments. Water surface fluctuations in reservoirs are...
Dual Source Water Supply Facilitates Power Plant Start-Up
The make-up cooling water supply for a four unit coal-fired steam turbine generating station required a peak demand of 28,000 gallons per minute (62. 4 cubic feet per second). Following...
Activated Sludge
A Comparison of Oxygen and Air Systems
The use of pure oxygen in biological wastewater treatment is the only major advance which has occurred in the area of activated sludge treatment since the early 1960's. Furthermore,...
The 1970s�ASCE Professional Activities
During the 1970s the Society had many impressive accomplishments, as documented by a multi-media presentation at the 1980 annual convention. Ten of these achievements are described, including...
A Cheap Solution to Pollution from Combined-Sewer Overflows
Every time it rains, the surface waters of many of the older communities around the U.S. are polluted by a mixture of sanitary waste and stormwater. The problem: when the community sewers...
Engineering Scheduling with Manpower Allocation
Originally published in
The Place of Land Treatment of Wastewater in Today's Society
Land treatment of sewage can be a viable alternative to secondary and/or tertiary in-plant treatment. Depending on local conditions, overland-flow, low-rate, or high-rate systems, or a...
European Water Treatment Practices�� Their Experience with Ozone
Today, more than 1100 water treatment plants worldwide use ozone for some purpose. In Europe, it is always regarded as a water-treatment technique and seldom simply as a disinfectant....
European Water Treatment Practices�� The Promise of Biological Activated Carbon
Bacterial growths occur in all granulated activated carbon columns. In fact, it is difficult to prevent such growths. The Germans now deliberately foster aerobic bacterial growth by providing...
EPA Proposes Far-Reaching Regulations for Reducing Synthetic Organics in Drinking Water
In late January, 1978, EPA proposed far-reaching regulations for reducing synthetic organic chemicals in drinking water, bringing about the most sweeping changes in the water-treatment...
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