rehabilitation large-diameter communications characterization

books:

Enhanced Characterization and Representation of Flow Through Karst Aquifers
Scott L. Painter, Alexander Sun, ...

American Water Works Research Foundation, 2007

This research report summaries and details the first year of work on a multi-year karst modeling project organized to develop enhanced groundwater modeling capabilities that can be used to effectively manage karst aquifers. Discussed are the three key considerations for modeling karst systems were identified: representation of conduits in flow models, representation of flow dynamics in conduits, and representation of partially filled conduits ...

Methods for Real-Time Measurement of THMs and HAAs in Distribution Systems Part 2
Gary L. Emmert, Michael A. Brown, ...

American Water Works Research Foundation, 2007

In this project researchers developed a practical, low-cost chemical analyzer for real-time monitoring of trihalomethanes (THMs) and haloacetic acids (HAAs) in drinking water distribution systems. THMs and HAAs are possibly harmful to humans if ingested. For this reason the US Environmental Protection Agency established maximum contaminant levels. Future regulations might lower the MCL of these substances. Real-time monitoring of THMs and HAAs ...

Impact of Chlorine Dioxide on Transmission, Treatment, and Distribution System Performance
Robert Andrews, Zamir Alam, ...

American Water Works Research Foundation, 2005

This book reports on the research done to determine whether East Bay Municipal Utility District, CA, can replace Cl2 with ClO2 for biofouling suppression in the aqueduct and in open-air treatment basins, with the aim of reducing THM and HAA concentrations without sacrificing treatment performance associated with the use of Cl2. It also discusses the positive and negative effects on treatment performance and water quality.

Advanced Processes for Simultaneous Arsenic and Manganese Removal

American Water Works Research Foundation, 2006

The overall objectives of this project were to modify, demonstrate, and optimize an existing treatment process to simultaneously remove both arsenic and manganese. The EPA established a new maximum contaminant level (MCL) for arsenic at 10 µg/L in January 2002, with compliance required by February 2006. Additionally the project set to establish an efficient process design approach for implementing this process. For this study the existing ...

Climate Change and Water Resources:: A Primer for Municipal Water Providers
Kathleen Miller, David Yates

American Water Works Research Foundation, 2006

The purpose of this project was to produce a succinct, educational report (Primer) for use by the drinking water utility industry outlining the current state of scientific understanding regarding the potential impacts of global climate change on water utilities, water supply, demand, and relevant water quality. Utilizing input from industry and science participants, the report includes a summary of the relevant science that explains the ...

Assessment of Auxiliary Backwash Method for Rapid Sand Filters
Richard Pohlman, Deborah Metz, ...

American Water Works Research Foundation, 2006

The primary objective of this project was to determine differences in filter effluent water quality and media cleanliness between sand filters employing air scour and those employing surface wash. Discussed in detail are the findings that scour and surface wash systems performed similarly relative to filter effluent quality and filter cleanliness. The advantages of one system over another can be site-specific particularly in retrofit ...

Asset Management Planning and Reporting Options for Water Utilities
Mike Matichich, Ron Booth, ...

American Water Works Research Foundation, 2006

This study provides comparative case studies for 11 utilities to illustrate the outputs that could result from adopting varying levels of asset management programs for a sample of their assets. . The study compares side-by-side the reports that would be generated by basic and higher-level asset management programs. The appendix includes sample outputs for the three asset management options studied and evaluations of the options and outputs by ...

Early Warning and Management of Surface Water Taste-and-Odor Events (Awwa Research Foundation Reports)
William D. Taylor, Richard F. Losee, ...

American Water Works Research Foundation, 2006

The core of this report is a set of guidelines, with case studies from several utilities, for evaluating and managing T&O events, prior to customer complaints. The difficulty lies in the extreme sensitivity that many individuals have for the most difficult to manage earthy/musty taste and odor compounds, geosmin and 2-methylisoborneol (MIB). The guidelines are supported by providing information, tools and guidance of direct and immediate value ...

Applicability of Reliability-Centered Maintenance in the Water Industry
Christopher Fynn, Marius Basson, ...

American Water Works Research Foundation, 2007

This research report assessed how water utilities could apply Reliability-Centered Maintenance (RCM) to new and existing infrastructure and evaluated the costs and benefits of such programs. RCM components were identified as well as how utility maintenance programs are currently developed and how such a program would be implemented. RCM pilot projects were completed with the Denver Water Board and Veolia Water Indianapolis. Costs and ...

A Strategic Assessment of the Future of Water Utilities
Edward Means, Lorena Ospina, ...

American Water Works Research Foundation, 2006

Forty-three (43) water professionals met to discuss and develop the ten top future trends and formulate the strategies to deal with each trend. Nineteen trends are presented within this paper. The top ten trends are described along with potential implications, and coping strategies are: Energy; Drinking Water Industry Employment and Workforce Issues; Political Environment; Population and Demographic Trends;Regulatory Trends; Total Water ...

Environmental Management Systems:: A Tool to Help Water Utilities Manage More Effectively

American Water Works Research Foundation, 2006

This project was developed with two primary objectives: (1) to identify potential benefits to drinking water utilities from an environmental management system (EMS) and (2) to define steps necessary to develop a water utility sector–specific EMS model from which utilities could create their own EMS. This report reflects both the initial research into alternative EMS models and a “best practices” guidance based on the ISO 14001 framework. With ...

Message Management:: Effective Communications
Jane Mobley, Elaine Tatham, ...

American Water Works Research Foundation, 2005

This workbook presents “how to” communication planning activities which are designed to help a water utility develop or revise a basic communication plan. Focus is on the specifics of communication planning: goals, objectives, strategies and tactics using a model based on history, current needs, and other factors unique to the utility. Utility Managers and their staff will find this workbook and accompanying CD-ROM most useful, as research ...

Application of Well Condition Assessment and Rehabilitation Techniques
Jeffrey Lennox

American Water Works Research Foundation, 2007

Water wells must be rehabilitated periodically to keep the wells producing satisfactorily for long periods of time. This report offers techniques for both assessing the condition of water wells and rehabilitating wells, with emphasis on new chemical treatment techniques and adaptations of technologies from other industries. While this report does not rate individual products, it does recommend the types of treatments that may be most appropriate ...

Evaluating Water Loss and Planning Loss Reduction Strategies
Paul Fanner, Julian Thornton, ...

American Water Works Research Foundation, 2007

This report presents improved methods for quantifying real water loss in distribution systems and provides water audit and loss-reduction strategies for water utilities. Recovered distribution losses effectively represent an alternative major new source of water that will almost invariably be more economic than developing expensive new water supplies. Includes water auditing software on CD.

Assessment and Development of Low-Pressure Membrane Integrity Monitoring Tools

American Water Works Research Foundation, 2004

This research assessed membrane integrity monitoring methods for microfiltration (MF) and ultrafiltration (UF) membrane filtration processes. The project evaluated existing and newly developed methods for integrity monitoring using literature review and full-scale testing of the essential criteria of sensitivity, continuity, identifiably, reliability, and implementability. Recommendations are included. While this research was motivated by ...

Field Testing of USEPA Methods 1601 and 1602 for Coliphage in Groundwater

American Water Works Research Foundation, 2004

This study evaluates these two newly developed USEPA coliphage methods, which are under consideration for approval as required by the Groundwater Rule (GWR). Method 1601 is a qualitative two-step presence-absence procedure and Method 1602 is a quantitative single agar layer (SAL) procedure. This evaluation reports on their assessment of these methods for testing the vulnerability of groundwater for viral/fecal contamination as used for ...

Regional Solutions to Water Supply Provision
Robert C. Raucher, John Cromwell, ...

American Water Works Research Foundation, 2007

Regional solutions are any of the many options through which one water system will work with (or join) one or more water systems to address a problem or common need. These can range from combining and interconnecting physical systems to simple cooperative planning and management activities, such as joint purchasing agreements to realize quantity discounts. This report examines regional solution options, discusses the benefits and issues of the ...

Risk Management of Large-Diameter Water Transmission Mains
Yehuda Kleiner, Balvant Rajani, ...

American Water Works Research Foundation, 2005

This book reports on the approach developed to combine scarce available data with engineering judgment to manage failure risk of large-diameter water transmission mains and make informed decisions in a formal, consistent and tractable manner. Thus a deteriorization model was developed using fuzzy-based mathematical techniques The proof of concept computer prototype is included on the included CD. 4-color pages

Real-Time Artificial Intelligence Control and Optimization of a Full Scale WTP
Riyaz Shariff, Qing Zhang, ...

American Water Works Research Foundation, 2007

This study shows that advanced artificial neural network (ANN) model-based control systems can be used for drinking water treatment process control. ANN technology, an artificial intelligence technology that has the ability to learn patterns and relationships contained in sets of data, is the most powerful modeling tool currently available to the drinking water treatment industry. ANN predicts the output of a process given the values of process ...

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characterization, communications, large-diameter, rehabilitation, reliability-centered

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