Evaluating Hydro Project Benefits with the POWRSYM Production Cost Model
The contribution that a hydro peaking project or pumped-storage project makes to reducing system operating costs can be determined only by modeling the project's operation...

Evaluating History?The Edison Sault Powerhouse
The hydroelectric facility owned by the Edison Sault Electric Company at Sault Ste Marie, Michigan was an engineering marvel when it was designed and constructed. This paper explores the...

Generation Control Methods for Operating Efficiency Improvement
One way to increase the energy production of a hydroelectric powerplant is to improve the power production efficiency, that is, obtain more energy for a given quantity of water through...

Composite Materials Show Promise for Clean Kaplan Runners
In order to prevent any possibility of oil leakage into river water, LMZ manufactured Kaplan runners containing oil in the blade servomotor only, while the blade operating mechanism operates...

Case Study in the Upgrade and Rehabilitation Techniques of a Pumped Storage Installation
This paper presents a specific case study in the runner upgrade and unit rehabilitation of two pump/turbines at the Seneca Powerhouse. The study addresses the modern optimized designs...

Using Weighing Lysimeters to Develop Evapotranspiration Crop Coefficients
Weighing lysimeters provide an accurate means of measuring evapotranspiration (ET), the evaporative loss of water from growing crops. Two weighing lysimeters were installed at a research...

Arid Site Water Balance Using Monolith Lysimeters
Four weighing lysimeters, containing monoliths of undisturbed soil, are located at the Arid Lands Ecology Reserve near Richland, Washington (USA), and are used to measure the water balance...

Use of Stable Isotopes, Tritium, Soluble Salts, and Redox-Sensitive Elements to Distinguish Ground Water from Irrigation Water in the Salton Sea Basin
Evaporative concentration of irrigation water diverted from the Colorado River to the Salton Sea basin for several decades has produced an overlying system (that includes drainwater and...

Overview and Objectives of the Macrodispersion Experiment
TVA is conducting large-scale field experiments to better define movement and dispersion of contaminants in groundwater. This will support groundwater protection by making possible more...

Second Natural-Gradient Tracer Experiment
The Tennessee Valley Authority (TVA) has begun a second large-scale groundwater field experiment at the Columbus Groundwater Research test site in Mississippi. This research is a continuation...

Practical Technology Resulting from MADE Research
As is often the case, when theoretical research is performed, practical technology is developed in the process. This has occurred with the Macrodispersion Experiment (MADE) conducted at...

Well and Formation Losses
For design projects in the groundwater area, a step-drawdown test is commonly used to investigate the properties of the well-aquifer systems. Higher well and formation losses are usually...

Influence of the Deposition of Anthropogenic Organic Substances from the Atmosphere on Ground-Water Quality
Large amounts of organic substances are emitted into the atmosphere as a consequence of human activity. The primary emissions as well as their atmospheric reaction products reach the soil...

Pump Station/Storage Opportunities for Urban Freeway Systems
This paper introduces the concept of utilizing underground storage to minimize both the initial cost and the long-term maintenance and operation costs of multiple pump stations for a freeway...

Energy Losses Due to Air Admission in Hydroturbines
Admission of air at the exit of a hydroturbine runner is an attractive technique for raising dissolved oxygen levels downstream of a hydro plant. The air admission, however, is generally...

Oceanic CO₂ Uptake and Future Atmospheric CO₂ Concentrations
The global pattern of water column inventories of bomb-produced ¹⁴C suggests that an upwelling of bomb ¹⁴C-free...

Determination of Vertical Leakage for Nile Valley
The determination of vertical groundwater leakage is particularly important for irrigated agriculture where adequate drainage is required to prevent high water tables and related problems...

Seismic Design Practices for Power Systems: Evolution, Evaluation, and Needs
The evolution of seismic design practices in electric power systems is reviewed. In California this evolution had led to many installation practices that are directed at improving the...

First Experience Concerning the Seismic Behaviour of an Electric Power System in Eastern North America
The November 25, 1988, Saguenay earthquake of magnitude M_bL_g=6.5 occurred in the province of Quebec, Canada....

Earthquake Loss Estimation of the Portland, Oregon Water and Sewage Systems?Evaluation of Concentrated Facilities
This paper summarizes a report that provides an inventory of concentrated water and sewage facilities in two selected drainage basins in the City of Portland. Concentrated facilities include...

 

 

 

 

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