摘要:

This month's “Viewpoint” discusses changes which the water utility industry will have to make if the new federalism takes hold. These changes include destroying the notion that water is an invisible, cheap commodity, reinforcing and implementing measures to protect source water quality, and developing new and better measurement techniques for identifying contaminants.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05217.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

This discussion on urban water supply as part of the need for rehabilitation of the nation's infrastructure took place on June 7, 1983, at AWWA's annual conference in Las Vegas. Robert Spangler, AWWA director of public information, served as moderator. Participants were: William J. Marrazzo, water commissioner of Philadelphia, Pa.; Donald R. Boyd, director of the Water and Pollution Control Department of Kansas City, Mo.; Thomas E. Taylor, director of Dallas, Texas, water utilities; and Jerome B. Gilbert, general manager of East Bay Municipal Utility District of Oakland, Calif.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05218.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

The state public utility commission (PUC) had no jurisdiction over a city's production of groundwater from a common source of supply that allegedly interfered with the operation of a privately owned public utility's water supply system, according to the Supreme Court of Texas.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05221.x

出版商:Wiley    

年代:1983

数据来源: WILEY

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05222.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

Applications of telemetry to water distribution systems range from simple remote control systems to sophisticated digital software packages programmed for specific conditions. The capabilities of analog and digital systems are explained and compared.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05223.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

The experiences of the Denver (Colo.) Water Department with closed‐loop pumping, or closed pressure zones, serve to illustrate the circumstances under which such systems are practical and effective.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05224.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

The relationship of upstream flow variables to the flow characteristics of check valves is examined. The phenomena of cavitation, vibration and noise, minimum flow required to open the valve fully, internal motion, and wear of the components are discussed. These effects should be considered in the design, application, and use of swing‐check valves.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05225.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

A valve maintenance program implemented in economical stages can result in immediate improvement in distribution system reliability. Suggestions are given tor planning a program, exercising valves, and maintaining records.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05226.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

Various uses of power‐operated check valves are described. Some of the control arrangements shown in the figures can be used in lieu of more costly variable‐speed pumps for special flow conditions or pressure requirements.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05227.x

出版商:Wiley    

年代:1983

数据来源: WILEY

摘要:

In 1982 the incidence of noncoliform colonies increased alarmingly in the standard membrane filter tests of samples from the Springfield, Ill., system. This signaled a potential problem with bacteria and was followed by coliform infestation in the water mains. Intensive measures were taken to control bacterial growth in the water treatment process and in the distribution system, with an ultimate goal of preventing the reseeding of the system by chlorine‐resistant organisms.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1983.tb05228.x

出版商:Wiley    

年代:1983

数据来源: WILEY