摘要:

This column provides news briefs and vignettes of the water industry as of September 1965.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01509.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

The purpose of this study was to examine the feasibility of using dual water systems to furnish high quality water for drinking and other home uses. Dual water systems are defined as those involving distribution of two grades of water to consumers through independent pipe networks. The study also included the development of comparative costs of complete water systems that employ conventional and dual distribution systems.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01497.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

An emergency water supply should be made available to sustain life during times of disaster. Local available groundwater might provide such an emergency source. This article discusses a study of groundwater availability in New York City as part of that municipality's preparation for disaster conditions.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01498.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

In 1958, Congress passed the appropriation of $10,000,000 to build five distillation plants, each using a different process. These installations were designated as demonstration plants and were intended for the purposes of: demonstrating the practicability of conversion processes; developing information on how to utilize the processes effectively; and, providing a firm basis for developing and estimating costs for large plants that could be used for municipal water supply. One of the plants built under the provisions of this act was located in San Diego, California, and was designated as Sea Water Conversion Demonstration Plant No. 2, or the Point Loma plant, and had 1 mgd of capacity and employed the multistage flash distillation process. The article discusses this process, along with distribution problems, effects of the site, city operation of the plant, analytic findings, consumer reactions, and sewage treatment.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01499.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

The Water Quality Control Laboratory at Stanford University conducted a project on the feasibility of reclamation of reusable water from sewage. The objective of the project was to demonstrate that water can be reclaimed for beneficial use. Reclamation includes the removal of biodegradable organic matter, trace organics of an exotic nature, and phosphorus and nitrogen. Laboratory work was performed at Stanford University, and pilot plant work was done in cooperation with the city of Palo Alto, California. The pilot plant has been used to confirm the results of laboratory studies on tertiary treatment and to demonstrate the feasibility of wastewater renovation processes.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01500.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

This article discusses the beneficial uses of groundwater. This resource, rather than being over developed, is still in the infancy of its use. Furthermore, groundwater is predictable in nature and economical to develop. Wells can be constructed so that their efficiency and life expectancy are equal to, or exceed that of, other types of machinery. The author suggests that a negative connotation associated with the use of groundwater has delayed development of this resource, and is still held by a significant percentage of people engaged in planning, designing and operating water works facilities.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01501.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

This article discusses well point systems, a group of small‐diameter wells connected to a common header and pump. The well points can be installed to any depth, 60‐100 ft being not uncommon. Widespread use of well point systems for control of groundwater during construction dates from about 1924. Today in the U.S., thousands of temporary installations are made each year. With these systems, flows ranging from a few thousand to many millions of gallons per day are removed from the ground and dumped into the nearest sewer or stream. This article discusses the problems associated with temporary dewatering systems, and presents examples of successful well point systems.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01502.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

This article discusses a method of concurrently collecting hydraulic and sediment data that utilizes existing equipment. The U.S. Geological Survey, in cooperation with US‐AEC, conducted an investigation on the lower Columbia River, downstream from the Hanford Atomic Energy Reservation in southeast Washington. The need for concurrent observation of velocity, depth, and suspended‐ sediment concentrations in the river, especially in reaches affected by tides, led to a study of the multiple use of a suspended‐sediment sampler; first, as a sounding weight in conjunction with a current meter; and second, as a sediment sampler.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01503.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

The torque required to operate a butterfly valve is dependent upon valve diameter, shaft diameter, bearing friction coefficient, type of seat and seat material, shutoff pressure, velocity, disc configuration, system head characteristics, and piping arrangement. These factors combine into four kinds of torque that are discussed in the article. The article includes an example of the arithmetic for determining the maximum operator torque required for a typical valve.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01504.x

出版商:Wiley    

年代:1965

数据来源: WILEY

摘要:

The city of Corpus Christi, Texas, has experienced considerable difficulty with both interior and exterior corrosion of its steel water tanks. After many years of experience with various types of interior coatings in several of the elevated tanks in the city, it was found that good protection at low initial and maintenance costs can be obtained by the application of a cement‐mortar coating below the high‐water line and a grease compound on all steel surfaces above the high‐water line. This article discusses the application of this practice in Corpus Christi.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1965.tb01505.x

出版商:Wiley    

年代:1965

数据来源: WILEY