摘要:

The President of AWWA shares with us some thoughts on areas of interest and vital concern to water utility management.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03846.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

The growth of fluoridation over the past 25 years has made necessary new techniques of chemical feeding and analysis, and raised questions of public acceptance, and continues to be a lively topic for discussion. Herewith a brief history.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03847.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

This Journal AWWA monthly column offers sometimes tongue in cheek musings about issues, trends, politics and events as they relate to both AWWA and the water industry in general. This month's column talks about: a proposed “Action Now” program; the 25th anniversary of fluoridation; the federal government's desalting program; political negotiations between the Soviet Union and the United States over ocean waters; the father of the modern toilet, Thomas Crapper; and, poetry regarding the power of water.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03859.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

A review of research on the relation of heart disease to soft water during the past decade uncovers sufficient correlation to suggest that more definitive studies need be undertaken to resolve the question.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03848.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

Municipal suppliers often sell processed water to suburban communities around the central city, and thus become metropolitan suppliers. Managerial, distribution, and fiscal arrangements for such mother‐daughter agreements are examined in this joint discussion presented on May 19, 1969, at the Annual Conference, San Diego, by Aldo J. Benedetti, Garrett Sloan, Clifford W. Hamblin, and Albert E. Woodhead Jr.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03849.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

Reliable operation of a wide‐urea system does not happen by chance. Although all problems cannot be foreseen, certain operational, personnel, and fiscal policies can be adopted to enhance the reliability factor.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03850.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

Injection of fresh potable water was accomplished to study the hydraulic characteristics of the injection mound as compared with the pumping drawdown. Results indicated that injection requires establishment of a boundary pressure for entrance of the injection water into the aquifer pores.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03851.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

AWWA Committee 8310D‐Steel Pipe, discovered errors in AWWA Manual M‐11 Steel Pipe Design and Installation, released in June 1964. Corrections were printed (R6414) in Journal AWWA, Vol. 56, No. 11, November 1964. The R6414 Corrections to Page 80, Table 8.2 and footnote thereto are subject to misunderstanding; also additional errors have been discovered in other parts of Chapter 8, Manual M‐11 subsequent to issue of Correction R6414. Committee 8310D has recomputed Table 8.2 and it should be changed to read in accordance with the revision shown here, dated June 12, 1969. It is also suggested that errata be inserted on other indicated pages of the manual, as detailed in the article.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03855.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

Numerical method by finite differences is used for the analysis of cylindrical and conical tank walls of variable thickness. Tables are presented which give the ring tension and bending moments in cylindrical tapered walls. Finite differences are also used to derive the wall flexibility and stiffness matrices related to edge displacements. Two tables are given for the calculation of the effects of radial forces and displacements. Finally, the continuity between cylindrical and conical walls is treated by finite differences.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03852.x

出版商:Wiley    

年代:1970

数据来源: WILEY

摘要:

Farmers and water utilities men know that dry‐period frequency information is an important parameter in defining the precipitation regime of an area. A procedure is presented for obtaining the probability of dry‐day sequences up to 20 days in length.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1970.tb03853.x

出版商:Wiley    

年代:1970

数据来源: WILEY