Author: W. M. Grayman
Publisher: American Water Works Association
ISBN: 1583210067
Category : Water
Languages : en
Pages : 270

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Book Description

Author: Gregory J. Kirmeyer
Publisher: American Water Works Association
ISBN: 1583210741
Category : Water
Languages : en
Pages : 380

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Book Description
The report of multi-disciplinary team of engineers and practitioners from a research project commissioned by the Association to create a resource to help water utilities operate and maintain water distributions systems to prevent water quality from deteriorating. They look at prevention programs, qu

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309133955
Category : Science
Languages : en
Pages : 404

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Book Description
Protecting and maintaining water distributions systems is crucial to ensuring high quality drinking water. Distribution systems-consisting of pipes, pumps, valves, storage tanks, reservoirs, meters, fittings, and other hydraulic appurtenances-carry drinking water from a centralized treatment plant or well supplies to consumers' taps. Spanning almost 1 million miles in the United States, distribution systems represent the vast majority of physical infrastructure for water supplies, and thus constitute the primary management challenge from both an operational and public health standpoint. Recent data on waterborne disease outbreaks suggest that distribution systems remain a source of contamination that has yet to be fully addressed. This report evaluates approaches for risk characterization and recent data, and it identifies a variety of strategies that could be considered to reduce the risks posed by water-quality deteriorating events in distribution systems. Particular attention is given to backflow events via cross connections, the potential for contamination of the distribution system during construction and repair activities, maintenance of storage facilities, and the role of premise plumbing in public health risk. The report also identifies advances in detection, monitoring and modeling, analytical methods, and research and development opportunities that will enable the water supply industry to further reduce risks associated with drinking water distribution systems.

Author: Robert Maurice Clark
Publisher: Amer Water Works Assn
ISBN: 9781583218167
Category : Business & Economics
Languages : en
Pages : 400

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Book Description
Rev. ed. of: Modeling water quality in drinking water distribution systems / Robert M. Clark, Walter M. Grayman. 1998.

Author: J. Clement
Publisher: American Water Works Association
ISBN: 184339913X
Category : Science
Languages : en
Pages : 132

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Book Description
There are two groups of specialists involved in the development and application of water quality models, each of which have a different perspective on the use of models: Academics and scientists - chemistry specialists and microbiologists who develop the models. Practitioners - modelers and distribution engineers who use them to solve problems. There are limitations and constraints in the characterization of the underlying processes and the practical application of models to distribution networks, which require further research. The objectives of the research were to characterize the current state of predictive distribution system water quality models and to identify critical research needs for their improvement. The project reviewed both the development and application of models. The report is intended to both steer future research and to act as a general reference on water quality modeling. The report combines a literature review with the practical experience of the project team. The content of a draft report was discussed at an international workshop attended by academics, engineers, scientists, and hydraulic modelers with the objective of agreeing on specific research needs necessary to improve predictive modeling for water quality in distribution systems. The conclusions of the report are derived from the workshop and form the basis of 11 specific research briefs that have been submitted to AwwaRF for consideration of funding. Researchers often focus on modeling the individual processes that control water quality rather than fully modeling water quality throughout distribution systems. For these "process models" to be applied to real distribution networks, they need to be extended to take in account the physical characteristics of the system?the special and temporal variations in flow, velocity and water age, and the effects of mixing water that has traveled along different flow paths.

Author: Gregory J. Kirmeyer
Publisher: American Water Works Association
ISBN: 0898679834
Category : Reservoirs
Languages : en
Pages : 326

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Book Description

Author: Melinda J. Friedman
Publisher: American Water Works Association
ISBN: 1583213880
Category : Water
Languages : en
Pages : 256

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Book Description
CD-ROM contains chapter 4 and appendices A & B.

Author: Thomas M. Walski
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 812

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Book Description
Accompanying CD-ROM includes: a 25-pipe academic version of WaterCAD with stand-alone interface; the WaterCAD files for individual problems; the WaterCAD user manual and an examination booklet for continuing education credits; Adobe Acrobat Reader software for viewing the manual and booklet.

Author: Yakir J. Hasit
Publisher: American Water Works Association
ISBN: 1583215131
Category : Drinking water
Languages : en
Pages : 116

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Book Description
Many water utilities deal with water quality problems in the distribution system due to low water usage. This study uncovers the many problems of low usage and reports on the variety of mitigation practices used by North American utilities. An included CD-ROM provides decision support software to help utilities systematically weigh the costs and benefits of a variety of best management practices (BMPs) for mitigating the water quality issues caused by low usage and thus cutting down on customer complaints and higher distribution costs.

Author: Ron Perrin
Publisher: Xlibris Corporation
ISBN: 1477160760
Category : Technology & Engineering
Languages : en
Pages : 160

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Book Description
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