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Monitoring the effect of zebra mussels on raw-water intakes

Sami F. Sarrouh and Nagah Ramadan
Journal (American Water Works Association)
Vol. 86, No. 5, Small Systems (May 1994), pp. 98-102
Stable URL: http://www.jstor.org/stable/41294617
Page Count: 5
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Abstract

Many raw-water intakes in the Great Lakes are threatened by infestations of zebra mussels. Hydraulic testing and visual inspection of the intakes tend to be time-consuming and costly. The authors introduce an index (the damping ratio) that can be simply and inexpensively used to monitor the conditions of water intakes by signaling a change in flow resistance. The authors calculated some damping ratios and compared them with hydraulic data from drawdown tests. The results show that the damping ratio index has a direct relationship with the friction coefficient of the intake.

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