ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03279.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

Through a conversation with Harp Nolan and Mick Mahoney at an Irish bar, Mr. Mannion urges participation in the new AWWA utility survey. The data will be used to help supply water utility information to the federal government.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03280.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

An Arizona appellate court ruled that the Arizona Corporation Commission's imposition of interim water rates did not constitute retroactive ratemaking.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03284.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

This discussion on the effect of the world marketplace on the water industry took place June 21, 1989, during AWWA's Annual Conference in Los Angeles, California. Topics covered include privatization, Common Market changes, world market competition, and water treatment and supply in Third World countries.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03285.x

出版商:Wiley    

年代:1989

数据来源: WILEY

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03286.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

One of the fastest growing industrial cities in the world, São Paulo, Brazil, is located in a region with scarce water resources. Supplying adequate water to the greater São Paulo metropolitan area is a monumental task. At the present time, 1,070 mgd (47 m3/s) of water is supplied to 15 million people in the area, but it is not enough. An additional 450 mgd (20 m3/s) will be needed by the turn of the century. To meet this challenge, Companhia de Saneamento Basico do Estado de São Paulo (SABESP) has developed a new water supply system, the Alto Tiete system, to cover the eastern part of the metropolitan area, together with a 340‐mgd‐(15‐m3/s‐) capacity state‐of‐the‐art water treatment plant, which is now under construction. This article discusses the project and the highlights of the treatment plant design.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03287.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The author describes the need for and proposes a plan to organize an AWWA‐sponsored program that would provide technical assistance and training to help less developed countries improve their drinking water supply and sanitation services. This program proposal was prepared for the AWWA International Affairs Committee at the request of Steven Bonk, immediate past‐president of AWWA, and approved in principle by the AWWA Board of Directors at the 1989 annual conference in Los Angeles. A special presidential committee is currently assessing how such a program could be financed and organized, with a final report due to the Executive Committee in December.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03288.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

Many utilities do not appreciate the fact that routine breaks of metal water mains often result from deterioration caused by gradual external corrosion. The author outlines the basic terms and conditions of galvanic and electrolytic corrosion, summarizes case studies that illustrate causes of external corrosion of underground metal mains and that describe methods to control external corrosion, and discusses the role of soil in external corrosion. Critical research needs identified include prolonging existing main life, identifying and controlling electrolytic corrosion problems, and evaluating the economics of corrosion control for new mains.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03289.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

In many parts of the United States, water utilities with highly organic source waters and long source water transmission lines are troubled byCorbicula fluminea, the Asiatic clam. The traditional method of control, free chlorination, often can no longer be used because of the formation of excessive amounts of trihalomethanes (THMs). This study compared the effectiveness of six biocides for controlling the juvenile Asiatic clam. Of the six, monochloramine was found to be the best for controlling the juvenile clams without forming THMs.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03290.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The Asiatic clam (Corbicula fluminea) has become a pest to many users of freshwater transmission systems. Monochloramine has been suggested as a biocide because it is effective and the formation of trihalomethanes is low (see the article on page 53 of this issue). Flow‐through aquariums, a laboratory incubator, and a pilot‐scale pipeline were used to show that monochloramine concentrations between 1 and 10 mg/L effectively killed juvenile clams over a wide range of water temperatures, with mortality increasing significantly with temperature. The reduction in clam mortality as water temperature decreases can be overcome by corresponding increases in biocide concentration. An equation is provided that predicts the kill that would be achieved at a given biocide residual and water temperature. The pH did not affect the efficacy of the biocide.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03291.x

出版商:Wiley    

年代:1989

数据来源: WILEY