摘要:

In response to the recent “Viewpoint” by Abel Wolman (Journal AWWA January 1984), the author expresses concern about “detectable” levels of contaminants. As monitoring technologies improve, some amount of trace organics will be detected. Health effects should be researched further, putting them into perspective with other sources of the same contaminants and other risks humans face. Also, prevention at the source will be less costly than expensive treatment techniques. Wolman replies that his position on health implications of organics has been modified as it became evident that effects and risks of organics can often be studied only on a long‐term basis.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05357.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

Small water systems often are not equipped with adequate facilities or personnel to comply with the various water quality regulations currently in effect. The author, superintendent of the Hyde Park Fire and Water District in Hyde Park, New York, describes how so‐called cover‐up compliance is used to skirt local politics or even unemployment. Better communication is needed concerning new rules and required tests, both for increased understanding by the public and for true compliance on the part of water system operators. This letter was written in response to “Face to Face” featuring Jacqueline M. Warren of the Natural Resources Defense Council (Journal AWWA January 1984).

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05358.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

A consolidated utility system, according to the Alabama Supreme Court, can establish rates that allow one component of the system to subsidize another.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05360.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

This discussion about deliberate acts of vandalism aimed at water utilities took place during the 1983 annual conference in Las Vegas. Fred Elwell, chairman of the AWWA Water Utility Council and chief engineer of the Manchester Water Works. 281 Lincoln St., Manchester. NH 03103. was moderator. Other participants were Joseph A. Cotruvo, director of the Criteria and Standards Division. Office of Drinking Water, USEPA. Washington. DC 20460; William A. Kelley, chief of the Water Supply Division, Michigan Department of Health. 3500 N. Logan St., Lansing. MI 48914; James V. La Frankie, president of the American Water Works Service Co., 525 Grove St., Hadden Heights. NJ08035; and William H. Miller, manager of the Denver Water Department, 1600 W. 12th Ave., Denver, CO 80254.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05363.x

出版商:Wiley    

年代:1984

数据来源: WILEY

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05364.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

The city of Houston, Texas, has recently completed installation of an interactive computerized data management system for use by the public works, tax, planning, police, fire, and public health departments. This article describes the four‐year process of assembling the system, which includes a continuous planimetric map covering 1550 km2(600 sq mi), land ownership and land‐use information about some 554 000 parcels, and complete information on the water, sanitary, and storm sewer systems, the road network, and bridges. Accurate graphic and nongraphic data are now readily available and can be updated to keep pace with the city's mushrooming growth.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05365.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

The findings of a water audit and leak detection investigation generated input for a new computer‐aided drafting and design system (CADD) for the city of Des Plaines, Ill. Installation of the computerized system will upgrade the usefulness and accuracy of documents pertaining to the city's water and sewer systems. Immediate benefits were realized from the discovery of significant leakage, and long‐range benefits will be realized from the inherent flexibility of the CADD system and the ease with which up‐to‐date records can be maintained. Graphic overlays on base maps of the city can be generated in hard‐copy form to produce the graphic and nongraphic data needed for a given use. These data, stored in CADD, will also be of use to other municipal departments.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05366.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

Five microcomputer programs allow more rapid design of the components of municipal water systems. These programs cover the yield of a water source, a projection of water demand, the most economical size of a distribution pipeline, the required capacity of a regulating storage facility, and an economic analysis of the net benefits of the project. The method used in each program is briefly described, and an example for sizing a transmission main for pumped water is presented.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05367.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

Calibration enables a computer model to simulate field conditions accurately. Telemetry data and field measurements of the system provide base data for calibration, but computer programs that automatically extract and compare pertinent data with simulated values can aid the process. Once calibrated, the model can be used with a great degree of confidence as a predictor and as a benchmark case for further analyses. The degree of accuracy to which a model should be fine‐tuned is related to the complexity of the model and to the purpose of the study.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05368.x

出版商:Wiley    

年代:1984

数据来源: WILEY

摘要:

Selecting the best design for new distribution pumping stations is difficult without the aid of mathematical computer models. Several analyses of the Norfolk (Va.) water system were performed to determine pump characteristics at various demand conditions, system head curves, pump combinations, control valve‐sizing, and back‐pressure control settings.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1984.tb05369.x

出版商:Wiley    

年代:1984

数据来源: WILEY