摘要:

This column provides news briefs and vignettes of the water industry as of March 1963.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01025.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This joint discussion begins with a discussion by Dean C. Noll and Theodore T. Roberto of a fuel oil storage tank leak at Cupsaw Lake in New Jersey in January 1962. The North Jersey District Water Supply Commission's Wanaque Reservoir received overflow water from Cupsaw Lake. The ice on the lake was acting as a natural barrier to the flow of oil toward the spillway. The article discusses preventive measures to keep the oil from flowing over the spillway. A second oil contamination incident at the lake was mitigated by prevailing winds and a low reservoir level. A second discussion by Lewis W. Klockner Jr. of an ice‐clogged reservoir intake on the Delaware River in Trenton, New Jersey, during the winter of 1961‐62, was solved by a helicopter hovering over the intake on the upstream side.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01017.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses the Water Supply Act of 1958 that made possible the inclusion of storage in multipurpose reservoirs, planned or constructed by the Corps of Engineers or the Bureau of Reclamation, for anticipated municipal and industrial water demands. Pitfalls in the planning of multipurpose reservoirs are discussed, along with the importance of the consideration of the scope of the project.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01026.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses the use of compressed air to force circulation and counteract stratification in Lake Wohlford Reservoir owned by the Escondido Mutual Water Company in San Diego County, California, in April 1961. Eighty hours of air injection at approximately 210 cfrn reduced the top‐to‐bottom temperature differential from 16.5°F to 2°F. Reservoir stratification was thus eliminated, allowing reaeration of the entire body of water.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01027.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

The clarification of water by aluminum sulfate is a widely used and standard treatment operation, elementary to most water treatment engineers. However, this article discusses a unique aspect of the use of alum, not in conventional treatment plant operations, but in waters that are either in, or entering into, distribution reservoirs. The Department of Water and Power in Los Angeles, California, used powdered alum for this unique clarification operation in reservoirs on three recent occasions, and has used it to reduce turbidity of storm runoff water on many other occasions in the past. Several methods of treatment have been used, and this paper briefly reviews some of the department's experiences and the operational problems that were encountered.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01028.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses conclusions by the authors that microbiologic activity is involved in the solution and increase in concentration of manganese in the hypolimnion of an artificial lake studied; that dead or dying cells are not the major source of the manganese, although they may be the source of organic matter which is used in the metabolism of certain bacteria which release the manganese into solution by reduction of manganese dioxide. The presence of such complexing agents as carbonic acid, tannin, and lignin accelerates the rate of increase in manganese concentration. The roots of a heavy brush cover in a tight soil can create a large BOD, thus producing DO‐free groundwater and contributing to the solution of manganese.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01029.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses the locating, testing, and developing of the groundwater supply for the town of Cheshire, Connecticut. Seven test wells were installed. The first, which was closest to Mill River, reached ledge rock at a 48‐ft depth. The remaining six, at varying distances west of Mill River, encountered a ledge at depths of 104‐ 195 ft. Four were selected for 24‐hr test pumping, yielding from 9 to 15 gpm of medium‐soft water per foot of drawdown. It was estimated that these sites will each yield a maximum of 800‐1,000 gpm when developed with gravel‐packed wells. At this site, 1,003 ft of 8‐in. test wells, including 41 ft of penetration into the underlying sandstone, were installed and removed. Approximately 350 ft of 2‐in. observation wells were installed. Four of the seven wells were test pumped for 24 hr. The entire test program at this site totalled $14,148, or an average of $14.10 per foot of 8‐in. test well.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01030.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses the proper location of water storage tanks connected with a water distribution system for distribution storage, including elevated, standpipe, or ground storage tanks. In addition to engineering requirements, which will designate the desirable location, the article discusses other issues including: governmental zoning regulations; elevation and technical requirements of the connecting distribution system; esthetic aspects which may affect public relations; architectural quality, crowding, and the availability of sufficient land for landscaping; and, the effects of a tank on adjoining properties.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01031.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article provides a comparison of the design assumptions with actual field performance of two large‐diameter steel pipelines constructed by the city of St. Paul, Minnesota, during the period from 1958 to 1960. The work was performed under two separate projects, designated as the 6O‐in. Fridley line and the 90‐in. Vadnais line. Each of these two new lines parallels an existing concrete line of equal size and capacity. At the present pumping head of 145 ft, the capacity of the Fridley line is about 50 mgd. The capacity of the Vadnais line, with its available head of 12 ft, is about 96 mgd. Specifications for each project provided for alternative bids on reinforced concrete pressure pipe and coal‐tar coated cement‐mortar lined steel pipe. In each instance, the low bidder selected steel pipe.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01032.x

出版商:Wiley    

年代:1963

数据来源: WILEY

摘要:

This article discusses the basic premise that water rates must be designed to recover the total annual costs of a water utility. Topics covered include: the difference in revenue requirements between investor‐owned and publicly owned water utilities; depreciation expense as a revenue requirement; establishing a base year from which projections can be made; comparisons of operating ratios; future revenue requirements; application of principles of pricing; avoidance of undue discrimination; typical rate schedules; use of block rates; demand component of cost; demand rates; zone rates; and, miscellaneous considerations.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1963.tb01033.x

出版商:Wiley    

年代:1963

数据来源: WILEY