摘要:

Mr. Mannion believes that water rates will definitely rise due to the economic impact of the upcoming regulatory program. He suggests that utility officials be more communicative with their customers, assuring them of the industry's commitment to safety and describing the rate increases likely to be necessary to achieve the new standards. Also utilities should take an active role in providing data, technical advice, and professional assistance to the government.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03197.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The Supreme Court of New Mexico ruled that a contract for the sale of land transferred full water rights.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03199.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

Harold E. Snider, AWWA president‐elect, discussed association programs and activities, including the regulatory affairs area, with Mark A. Scharfenaker, associate editor of the JOURNAL. Snider is assistant director of the Kansas City (Mo.) Water and Pollution Control Department, which he joined in 1961. He was instrumental in establishing the Distribution System Symposium as a regular AWWA activity and has served the US Department of Commerce as the US delegate on several international committees dealing with water issues. Snider became a member of AWWA in 1961 and is also a member of several other engineering and professional organizations.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03202.x

出版商:Wiley    

年代:1989

数据来源: WILEY

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03203.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

Water utilities across the United States, especially those serving rapidly growing areas, have become aware of the need for long‐range financial planning to respond to changes in the nation's economy, to evaluate and plan for the impact of the 1986 Safe Drinking Water Act amendments on their operation and capital program, to accommodate changes in national tax legislation that significantly affect investment and bond markets, and to evaluate changing patterns of water use brought about by conservation efforts. This article focuses on the process the Tucson (Ariz.) Water Department uses to develop long‐range financial plans. The fundamental steps in this process are presented, including establishment of a mechanism for citizen involvement, formulation of policies that guide financial planning efforts, and identification of the components of a financial plan and of the tools utilized in the planning process. The preparation and publication of such plans have built confidence and credibility in Tucson Water among both customers and policy‐makers.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03204.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

General Motors Corp. (GM) negotiates rate and service contracts with its water suppliers as often as possible, based on fairness to the water utility, the utility's other customers, and GM. Water rates, in GM's view, should be adequate to maintain the operational and financial stability of the utility as a self‐supporting enterprise and should be based on the cost of service, without cross‐class customer subsidization or revenue subsidies. Detailed rate and service contracts are used by GM as vehicles to achieve these goals with its water suppliers.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03205.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The basic tools of economics and statistics are applied to water‐demand forecasting and price‐elasticity measurement by the East Bay Municipal Utility District, Oakland, Calif. Little expertise is required to produce good forecasting results with time‐series models, which can also yield meaningful elasticity estimates if price increases are significant and the data are sufficiently disaggregated. Pooled time‐series and cross‐sectional models are more demanding in their structure and data requirements but often provide better estimates of the impact of price variables than simple time‐series analyses.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03206.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

Background organic matter in the Rhine River significantly affected the behavior of trichloroethene (TCE) and 1,2,4‐trichlorobenzene (TCB) in granular activated carbon (GAC) columns. The GAC column adsorption capacity for TCE was found to be more than 50 percent less than that found in batch adsorption experiments. The capacity for TCE of GAC preloaded with organic matter was found to be very similar to that of a TCE‐spiked GAC column, suggesting that the preloading isotherm approach can be useful in predicting GAC column capacity. Because of long‐term reductions in adsorption capacity, the breakthrough of TCE in a full‐scale column is not well predicted by the direct scaleup approach. Complete removal of TCB, presumably by biodegradation, was found after 40 days of operation.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03207.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The effects of coagulation of organic matter by alum (as influenced by coagulation pH, dosage, and potassium permanganate preoxidation) on the thickening and dewatering characteristics of aluminum hydroxide sludges were examined. Sludge dewatering characteristics worsened as the specific amount of organic matter incorporated into the sludge floc matrix increased. The observed changes in sludge characteristics were correlated to a decrease in sludge floc size and density that occurred when greater amounts of organic matter were incorporated into the floc structure. Addition of potassium permanganate improved sludge dewatering rates; the dosage required for improvement was a direct function of the amount of organic matter present in the sludge.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03208.x

出版商:Wiley    

年代:1989

数据来源: WILEY

摘要:

The particle‐removal performance of several full‐scale water treatment plants is evaluated using a systems analysis approach. Sources of particle‐volume concentration in raw water are discussed, and it is suggested that “dissolved” organic materials in raw water may be an important source of particle volume when coagulation precedes liquid–solid separation. Different inorganic coagulants were found to produce different solid phases when added to water. After distribution of particle sizes in raw water was adjusted for changes resulting from dissolved organic carbon in the water, configurations of the unit processes chosen in practice were found in most cases to correspond to configurations calculated to be cost‐optimal.

ISSN:0003-150X    

DOI:10.1002/j.1551-8833.1989.tb03209.x

出版商:Wiley    

年代:1989

数据来源: WILEY