Intrusion within a Simulated Water Distribution System due to Hydraulic Transients. I: Description of Test Rig and Chemical Tracer Method
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Volume 130, Issue 7
Abstract
A pilot-scale test rig was designed and constructed to simulate intrusion behavior associated with hydraulic transients initiated by sudden events such as rapid valve closure or uncontrolled change in on/off pump status (“pump trip”) in a water distribution system. After establishing steady state flow conditions, intrusion volumes were determined for 3.2 (1/8-in.) and 6.4 mm (1/4-in.) diam orifices overlaid with a column of water that provided 91 mm (3 ft) of external head. Average intrusion volumes associated with hydraulic transient events were determined by mass balance calculations using cesium as the tracer chemical. Average intrusion volumes were 11.4 and 71.2 mL for the two diameters, respectively. Given similar conditions in a water distribution system (i.e., an available pathway and favorable pressures), pathogens in the soil and water surrounding a water main potentially can intrude into the pipe during short-term pressure transient events.
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References
Barwick, R. S., Levy, D. A., Craun, G. F., Beach, M. J., and Calderon, R. L. (2002). “Surveillance for waterborne-disease outbreaks—United States, 1997 to 1998.” Center for Disease Control and Prevention, Atlanta, 49(SS04), 1–35; http://www.cdc.gov/mmwr/preview/mmwrhtml/ss4904a1.htm#fig6.
Boyd, G. R.et al. (2004). “Intrusion within a simulated water distribution system due to hydraulic transients. II: Volumetric method and comparison of results.” J. Environ. Eng., 130(7), 778–783.
Funk, J. E., Wood, D. J., Van Vuuren, S. J., LeChevallier, M., and Friedman, M. (2000). “Pathogen intrusion into water distribution systems due to transients.” Proc., 3rd ASME–JSME Joint Fluids Engineering Conf., ASME, New York, 3, 255–265.
Kirmeyer, G. J., and LeChevallier, M. W. (2001). “Pathogen intrusion into distribution systems.” American Water Works Association Research Foundation and American Water Works Association, Denver.
Kramer, M. H., Herwaldt, B. L., Craun, G. F., Calderon, R. L., and Juranek, D. D.(1996). “Waterborne disease: 1993 and 1994.” J. Am. Water Works Assoc., 88(3), 66–80.
Lippy, E. C., and Waltrip, S. C.(1984). “Waterborne disease outbreaks—1946 to 1980: A thirty-five year perspective.” J. Am. Water Works Assoc., 76(2), 60–67.
Tanaka, T., and Tsukamoto, H.(1999a). “Transient behavior of a cavitating centrifugal pump at rapid change in operating conditions. I: Transient phenomena at opening/closure of discharge valve.” J. Fluids Eng., 121(4), 841–849.
Tanaka, T., and Tsukamoto, H.(1999b). “Transient behavior of a cavitating centrifugal pump at rapid change in operating conditions. II: Transient phenomena at pump startup/shutdown.” J. Fluids Eng., 121(4), 850–856.
Tanaka, T., and Tsukamoto, H.(1999c). “Transient behavior of a cavitating centrifugal pump at rapid change in operating conditions. III: Classifications of transient phenomena.” J. Fluids Eng., 121(4), 857–865.
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Information
Published In
Journal of Environmental Engineering
Volume 130 • Issue 7 • July 2004
Pages: 774 - 777
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Feb 28, 2002
Accepted: Jul 17, 2002
Published online: Jun 15, 2004
Published in print: Jul 2004
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