Temperature Rise, Bank Erosion, and Jet Velocity Effects of Submerged Multiport Diffusers in an Estuary
Temperature distributions, potential bank erosion, and jet velocity and trajectory of submerged multiport diffusers were predicted as part of the permitting process for an fossil fuel...
Environmental and Hydraulic Considerations in the Design of a Circulating Water Cooling System
Environmental considerations play an important part in the design of a condenser cooling system. A once-through system may require assessment of a combination of events to determine the...
Design of a Stratified Cooling Channel
Cooling ponds are used for managing waste heat discharges. Cooling ponds are, however, expensive to construct and operate. A cooling channel is studied as an alternative means of managing...
Experimental Model Study of Over and Under Baffles
A hydraulic model study of a chlorine mixing channel was conducted at the Hydraulic Research Laboratory of the City of Los Angeles. An arrangement of over-under baffles was used to facilitate...
Tracking Cold Water in a Large Reservoir System
The Tennessee Valley Authority (TVA) Environmental River Resource Aid (TERRA) is a computer workstation graphics display that tracks environmental variables in the power service area....
Reviewing the Operating Objectives of the TVA Reservoir System
Under the Tennessee Valley Authority's Lake Improvement Plan, approved by the Board of Directors in February 1991, minimum flows will be provided systemwide, the releases...
Dam Removal Methods, Elwha River, Washington
Preparation of an Environmental Impact Statement (FERC, 1991) for licence applications for the Elwha and Glines Canyon hydroelectric projects on the Elwha River, Washington, included evaluation...
Enhancing Effluent Water Quality of Sedimentation Basins Using Constructed Wetlands Technology
The Tennessee Valley Authority (TVA) has constructed twelve wetlands to treat acid drainage at reclaimed coal mines and fossil-fueled power plants. These wetlands are designed primarily...
Detecting the Twin Vortex Draft Tube Surge
Experiments were performed to investigate a twin vortex draft tube surge in a homologous model and the prototype 700-MW turbines installed at the U.S. Bureau of Reclamation's...
Model Studies of Outlet and Intake at McCook Reservoir
Two separate physical models were used to investigate the outflow and inflow into the proposed McCook Reservoir. The proposed reservoir will be located in McCook, Illinois, and will serve...
Improved Intake Design for Downstream Migrating Fish at Hydropower Plants
Fish guidance efficiency of screens is a function of the submergence of a hydropower intake. The submergence of an intake can be reduced through the use of intake extensions or guides...
Diffuser Design for Water Quality-Based Toxics Control
U.S. Environmental Protection Agency regulations require that the discharge of toxic pollutants to the waters of the United States be controlled. These regulatory requirements have made...
Management of Water Resources Distribution in Iran
On the basis of 45th principle of the Iranian Constitution, seawater as well as river waters, streams and any other natural course, whether surface or underground, also floods, wastewaters,...
Cofferdam Rip-Rap Protection for the New Esna Barrage
A 1:60 undistorted mobile bed model of the Nile River in the vicinity of Esna Barrage was constructed at the Hydraulics and Sediment Research Institute to test rip-rap protection of the...
The Changing Face of Construction Management?Staffing up for a Major Program
The East Bay Municipal Utility District's (District) Wastewater Department annual construction program grew from $2.4 million in 1986 to $60 million in 1991. The District...
Environmental Engineering
This proceedings,
Water, Water, Where?
Water�who gets it, where it comes from, who pays for it�has always been a central issue in California. Rapidly increasing demand, fierce environmental opposition to new sources and a drought...
Nutrified Sludge
A new biological treatment process, Nutrification, enables a wastewater treatment plant to remove phosphorus from influent water at an operating and maintenance cost 35% less than that...
Measurement of Stream Reaeration Rate Coefficients Using Propane Gas
Three determinations of the reaeration rate coefficient, K2, were made on a 1185-m reach of the upper Assabet River in Westborough and Northborough,...
Technology Development for Auto-Venting Turbines
Experimentation with venting air into the hydroturbines at Norris Dam has convinced the Tennessee Valley Authority (TVA) that this is a viable method for increasing dissolved oxygen (DO)...
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