Modified Larsons Ratio Incorporating Temperature, Water Age, and Electroneutrality Effects on Red Water Release
Publication: Journal of Environmental Engineering
Volume 131, Issue 11
Abstract
Corrosion indices have a historical as well as practical relevance in drinking water treatment. The development of reliable indicators of corrosion related problems, like red water, is an ongoing process in the drinking water industry. Due to the complexity of interaction among the physical, chemical, and biological reactions taking place within a typical distribution system, mechanistic models are difficult to formulate. Even if such a model was available, fitting it to actual field conditions would still be an empirical process. Corrosion indices give simplistic generalizations to complex corrosion phenomena. A modified form of the Larson Ratio that includes the effects of temperature and hydraulic retention time is proposed based on apparent color release data available from a 2 year pilot distribution system study.
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Acknowledgments
The writers specially acknowledge Chris Owen, Tampa Bay Water Authority Quality Assurance Officer, who was the TBW Project Coordinator, and Roy Martinez, AWWA Research Foundation Senior Account Officer, who was the AwwaRF Project Officer, and the following Member Governments: Pinellas County, Hillsborough County, Pasco County, Tampa, St. Petersburg, and New Port Richey. Pick Talley, Robert Powell, Dennis Marshall, and Oz Wisener from Pinellas County, and Dr. Luke Mulford from Hillsborough County are also specifically recognized for their contributions. Several UCF Environmental Engineering students and faculty also contributed significantly to this project and are recognized for their efforts.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 131 • Issue 11 • November 2005
Pages: 1514 - 1520
Copyright
© 2005 ASCE.
History
Received: Jul 20, 2004
Accepted: Dec 20, 2004
Published online: Nov 1, 2005
Published in print: Nov 2005
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