Implemented Solutions to Wqter Supply Problems?The Tucson Experience
During the past 30 years Tucson Arizona has been one of the fastest growing urban centers in the United States. During this period, the population served by the municipal water utility,...

Future Transfers of Water and Conveyance Capacity Between the CVP and the California SWP
On November 24, 1986, the Bureau of Reclamation (USBR) and the California Department of Water Resources (DWR) executed an agreement known as the Coordinated Operations Agreement or COA....

GIS: Easing Infrastructure Management
GIS provides an ideal means for city planners and engineers to plan construction and maintenance of water-distribution networks, wastewater-collection systems and treatment plants, highways,...

Field and Model Studies of Ocean Outfalls
Field and laboratory studies of the behavior of wastewater discharged from the San Francisco ocean outfall are reported. Wastefield behavior was predicted by the mathematical models RSB...

Chemically-Enhanced Treatment: An Alternative to Biological Secondary Treatment for Ocean Outfalls
Chemically-enhanced treatment is a process whereby chemicals are added to wastewater in order to enhance solids removals through coagulation. This treatment process can obtain removal...

Iona Outfall Plume Characterization Study
Field studies were conducted in August 1988 to verify the performance of the new deep sea outfall for the Greater Vancouver Regional District (GVRD) Iona Island Sewerage Treatment Plant...

Water Supply and Aeration Demands for Shrimp Farms
A computer model was developed simulating flow and aeration requirements for a range of farm sizes, from 50 to 2000 hectares. Climatic effects and water quality upset conditions were included...

In-Stream Thermal-Regime Analysis for Powerplant Coolant Dispersion
A steam-tube dispersion model has been adapted to real-time simulation of heat dispersion in a 7-mile reach of the Des Plaines River below Joliet Power Station. Direct feedback control...

Mt. Elbert Pumped Storage Trashrack Failure
The failure of three trashrack sections for unit 2 at the suction-draft tube intake occured after one year in service. However, the trashracks for unit 1 had five years of service with...

The Calculation of Flushing Flows for Gravel and Cobble Bed Rivers
Flushing flows are needed to remove fines and sand from a gravel or cobble bed river. A natural stream will have periodic high flows adequate for flushing of fines and sand, but the hydraulic...

Physical Model Study of Navigation Conditions
This paper describes a physical model study performed to assess the impact of increased flows from a redeveloped hydroelectric generating station on the ability of pleasure boats to navigate...

Model Study to Design a Small Intake
A 1:4 scale model was used to design the make-up water intake structure for Burrillville Combined-Cycle Power Plant, Ocean State Power Project. The objective of the study was to assure...

Mechanical Aspects of Intake Gates at John Hart Dam
As part of the John Hart Dam rehabilitation program completed in 1988, six new intake gates complete with guides and hydraulic operators were installed replacing the existing gates and...

Streamflow Forecasting: Experiences in Development of Customized Systems for Hydropower Operations
Technical advances in computers and real time data acquisition favor the development of computer based streamflow forecasting systems. These technical advances should be combined with...

Intake Wheel Gates Sealing Arrangements
This article discusses the sealing arrangements for intake wheel gates. Advantages and disadvantages if upstream and downstream sealing arrangements including thier effects on the performance...

Ring Gate as Turbine Emergency Shut-Down Device
The ring gate, intially used as a regulating device in the early stage of the design of hydraulic turbines, has grown to a reliable emergency shut-down device. Incorporated in the hydraulic...

The Piedra del Aguila Project Large Radial Gates
Piedra del Aguila Hydroelectric Project is on the Limay River in Argentina. It has a capacity of 1424 MW with annual energy of 5500 GWH. This is an overflow dam, with intake gates, penstocks...

Top Projects 1990
A dam, a bridge, an expressway, an interchange, flood control improvements, wastewater treatment and a dredged material containment embankment round out the 1990 Outstanding Civil Engineering...

Lower Granite Fish Guidance Efficiency System Model Study?Snake River, Washington
With the annual migration of adult salmon up the Columbia and Snake Rivers and the migration of their offspring (juvenile salmon) downstream to the ocean, new problems have developed with...

Overview of International Ocean Energy Activities
An overview is presented of international research and development activities in four energy conversion areas: ocean thermal energy conversion (OTEC); wave energy conversion; tidal energy...

 

 

 

 

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