Keeping Lifelines Alive
There were no city water supplies to fight the fires in San Francisco after last year's earthquake. The fires were brought under control because of an historic auxiliary water...
Development of the Engineered Barriers for the Deep Geological Disposal of High-Level Radioactive Waste
Vitrified waste, overpack and buffer material are under research and development as engineered barriers in the deep geological disposal system of high-level radioactive waste. Static leach...
Columbus Generic Element Management Concept
The concept for largely autonomous onboard management of the ESA Columbus project elements relies on the automation of operational procedures. Reconfigurable items are commanded in sequence...
Removal of Scale from Potable Hot Water Systems by Carbon Dioxide Injections
An innovative method for inplace scale removal has been developed and demonstrated. Injection of carbon dioxide gas into a piping system can lower the pH of the hot water and remove or...
Predicting Watermain Breakage Rates
Recent studies on water main breakage have shown significant spatial and temporal clustering in the breakage pattern. The methodology described in the paper provides the basis for a prediction...
Probabilistic Basis for Managing Maintenance
The paper discusses a procedure based on component failure probabilities, consequences of failure, and risk associated with loss of system. Aging effect of structures and equipment on...
Models for Optimal Maintenance of Hydraulic Structures
Corrective maintenance includes the unscheduled repairs required to return a structure from a failed state to an operating or available state. Corrective maintenance is determined by the...
Urban Drainage Pipe Systems: Failure Diagnosis and Rehabilitation Planning
A Task Committee on Failure Diagnosis and Rehabilitation of Urban Drainage Infrastructure has been organized by the Urban Water Resorces Committee of the Water Resourcs Planning and Management...
The New Generation of Pipeline Rehabilitation
The new advancements in pipelines reconstruction technologies now permit total sewer system rebuilding of collectors, drainlines, manholes, service laterals, and force mains without excavation....
Appropriate Cost Factors for System Reliability
This paper examines the development of appropriate costs to be associated with various levels of failure of water distribution networks and water supply systems. A clear distinction is...
Is There a Future for Vacuum Sewers?
Vacuum sewers collect and transport sanitary sewage using pressure difference rather than gravity as the primary motive force. Compared to conventional gravity sewers, they use smaller...
Tutorial: Fuzzy Set Theory in Water Resources Systems
Principles of using fuzzy set theory (FST) to describe imprecision (or vagueness) in water resources systems are provided. The main tool of FST, the membership function, measures the degree...
Technical Work on Flexible Pipe/Soil Interaction Overview?1990
Research in the laboratory and field have been ongoing for the past seventy years on flexible pipe/soil interaction. Virtually all of the early work was done on steel pipe. During the...
Flexible Pipe Design Revisited
An overwhelming soil factor in the Iowa formula and random deformations at installation affords soil a prominent role in flexible pipe; this, together with a maximal deflection rule make...
Concrete Pipe Trenchless Technology
Precast reinforced concrete pipe is the most commonly used pipe material for jacking operations. For over 90 years, concrete pipe techniques, procedures and applications established the...
Pipeline Design and Installation
The proceedings of the International Conference on Pipeline Design and Installation, held on March 25-27, 1990 in Las Vegas, Nevada, presents information on all aspects of pipeline design...
Sounding Out Buried Waste
Geophysical diffraction tomography (GDT) is a new remote sensing technique for quantitative high-resolution subsurface imaging. It is similar to optical holography where long wavelength...
Bridges Under Surveillance
Although bridge monitoring is still in its infancy, research, pilot studies and field work are underway across the country. While today it's still a pie-in-the-sky goal, the...
Evaluating Spring Flow Trends at Pipe Spring National Monument and Vicinity, Arizona
A study conducted by the National Park Service Water Resources Division is resolving if ground water pumping is causing spring flow declines at Pipe Spring National Monument (PISP). Ground...
Numerical Simulation of Mudflows from the Hypothetical Failure of a Debris Blockage Lake Below Mount St. Helens, WA
This paper evaluates the characteristics of mudflow events resulting from the hypothetical breaching of a debris blockage dam using a variety of lake levels and impounded water volumes...
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