摘要:

Most small water supply systems in the United States take their raw water supply from groundwater sources. The operators of these small systems are often involved in the development of the groundwater supplies and the wells that draw this water. A major concern when developing any type of well is the sanitary quality of the water in the aquifer, the water‐bearing layer of permeable rock or soil from which water is drawn. There are many sources of aquifer contamination. Seepage of surface water containing contaminants into the aquifer, wastewater contamination, agricultural runoff and industrial wastes are potential sources of contamination. To avoid the problems of disease, and taste and odor that result from contamination, wells must be properly located and constructed. This article, which was adapted from the AWWA publication, Design and Construction of Small Water Systems: A Guide for Managers, offers guidelines for the location and construction of wells.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1985.tb00389.x

出版商:Wiley    

年代:1985

数据来源: WILEY

摘要:

Questions in this month's Certification Corner concern: flow velocity, surface runoff, indicator organisms, centrifugal pumps, corrosiveness of water, amperometric titration, water‐lubricated pumps, and pipe capacity.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1985.tb00391.x

出版商:Wiley    

年代:1985

数据来源: WILEY

摘要:

Much of the day‐to‐day operation of a large water distribution system is performed from a central location. Instrumentation allows operators in the control center to monitor flow rates, pressures, levels, and other important information from all parts of the distribution network. In many modern utilities, instrument readings are fed to one or more computers, which evaluate distribution system needs and adjust controls as necessary. Most systems continue to maintain simpler, on‐site instrumentation at remote sites, for testing purposes and as a backup to the main system. Some small utilities depend on similar direct‐acting equipment for daily operations. This article discusses the components and functions of instruments commonly used in a modern distribution system. Control equipment, which is used to operate pumps and valves automatically or from a remote location, is not covered. This is part one of a two‐part article on instrumentation and is adapted from the AWWA publication, Introduction to Water Distribution, Module 9, Instrumentation and Control. Part two appears in the May 1985 issue of OpFlow.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1985.tb00392.x

出版商:Wiley    

年代:1985

数据来源: WILEY

摘要:

The answers to a crossword puzzle on chlorination that appeared in the March issue of OpFlow presented found in this article.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1985.tb00393.x

出版商:Wiley    

年代:1985

数据来源: WILEY