AWWA JAW62923

Utilities must understand the issues involved when multiple source waters are blended,particularly the effect on distribution system water quality. This article describes amultiobjective technique that can help evaluate blends to identify acceptable water qualityfor simultaneous control of lead, copper, iron, and monochloramine levels in distributionsystems. Blends of three source waters - groundwater, surface water, and desalinatedwater - were evaluated. Modeling results indicated that different pipe materials often haveconflicting water quality requirements for release abatement. For example, corrosion ofcopper and lead pipes was increased by increasing alkalinity, whereas increasing alkalinitywas beneficial in reducing the release of iron corrosion products from pipes. Increasingsulfates reduced lead release but increased iron release. These conflicting water qualityrequirements for lead, copper, and iron release mean that utilities must evaluate the tradeoffsbetween water quality and corrosion response. Includes 10 references, tables.

Product Details

Edition:

Vol. 98 - No. 5

Published:

05/01/2006

Number of Pages:

9

File Size:

1 file , 250 KB