Hydraulic mixing and free chlorine residual in reservoirs

An extensive sampling study ot reservoir water quality was conducted in Azusa, Calif. Primary emphasis was placed on providing a better understanding of the dynamics of hydraulic mixing and free chlorine residual concentration distribution in the reservoir. The reservoir approached completely mixed...

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Bibliographic Details
Published in:Journal - American Water Works Association 1996-07, Vol.88 (7), p.48-59
Main Authors: Boulos, Paul F., Grayman, Walter M., Bowcock, Robert W., Clapp, Jonathan W., Rossman, Lewis A., Clark, Robert M., Deininger, Rolf A., Dhingra, Ashok K.
Format: Article
Language:English
Subjects:
Applied sciences
Bacteria
By products
Chlorine
Design
Disinfection & disinfectants
Drinking water
Drinking water and swimming-pool water. Desalination
Engineering firms
Exact sciences and technology
Flow velocity
Fluoride
Fluorides
Hydraulics
Inlets
Mixing
Physiological regulation
Pollution
Potable water
Quality standards
Regulation
Reservoirs
Residual Chlorine
Sampling
Storage facilities
Stratification
Surface water
Water Quality
Water Storage
Water treatment and pollution
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Summary:An extensive sampling study ot reservoir water quality was conducted in Azusa, Calif. Primary emphasis was placed on providing a better understanding of the dynamics of hydraulic mixing and free chlorine residual concentration distribution in the reservoir. The reservoir approached completely mixed behavior with two exceptions: a degree of short-circuiting between the inlet and outlet (which significantly affected the T₁₀ time) and the presence of a stagnant zone in the center core of the reservoir where there was less mixing and thus older water. These results support the assumption of stratification or partitioning in reservoirs. Regular field sampling is recommended to facilitate the effective management of distribution system water quality. In particular, interior sampling of reservoirs can provide useful information that could not be inferred otherwise.
ISSN:0003-150X
1551-8833
DOI:10.1002/j.1551-8833.1996.tb06584.x