Water Quality Consideration for Distribution System Storage Facilities

• Published in: Journal - American Water Works Association Vol. 100; no. 7; p. 60
• Main Authors: Edwards, Jerry, Maher, James
• Format: Journal Article
• Language: English
• Published: 01.07.2008
• ISSN: 0003-150X

Types of typical distribution system storage facilities and the factors that influence the selection of storage facilities are discussed. Hydraulically, there are two significant categories of storage facilities: pumped storage and floating storage. At pumped storage facilities, pumping must be provided to supply adequate pressure to the system or pressure zone. At floating storage facilities, the free surface of the water in the facility establishes the hydraulic gradient in the system or pressure zone. The variation of terrain within a system, cost considerations, a need for emergency storage, and aesthetics all play a role in storage tank selection. It is concluded that although modifications to the tank to facilitate mixing may improve water quality, the relative effect of tank location may be of much greater significance.