Thursday, April 7, 2022 at 2:00 p.m.

Session #5: What’s so scary about negative pressures?


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FREE to members.
Fee for non-members $30+HST.


Many things in the world have quite different consequences depending on something as simple as the sign on a number.   As an obvious example, it is much better to have a million dollars in the bank than to owe a million dollars.  It is much easier to cook an egg than to uncook it!   And it is much better to keep pressures positive than to allow them to go negative.   Indeed, many destructive, dangerous and dramatic consequences can occur both in nature and to pipeline systems if the pressure goes negative (that is, if it becomes less than atmospheric pressure).


At the completion of this one-hour OJT session, participants will be able to demonstrate the following:

              • How negative pressures can occur in a water supply system
              • Understanding of the potential consequences and their associated severities
              • How to design and operate these systems to minimize the threat of negative pressures

  • Facilitator:

    Bryan Karney

    Our facilitator is Bryan Karney, Professor of Civil Engineering at University of Toronto and Professional Engineer at HydraTek and Associates. Bryan graduated from the University of British Columbia with a B.A.Sc. degree in 1980 and a Ph.D. in Civil Engineering in 1984. He has been at the University of Toronto since 1987 and active in the consulting company HydraTek throughout that time. Bryan has over 30-years of experience in providing hydraulic services on a wide range of fluid systems, including water, wastewater, storm, oil, gas, and jet fuel. Bryan has spoken and written widely on subjects related to water resource systems, energy issues, and hydrology. He has written numerous papers and has been awarded a number of teaching and research awards


    These 1-hour virtual sessions are offered every alternate Thursday starting at 2:00 pm.  Sessions are complimentary to all OMWA members and the fee for non-members is $30.00 CAD plus HST per person per session.  

    If you have any specific questions regarding this OJT session, please feel free to submit them when you register and we will provide them to the workshop facilitator.   

    The OMWA will provide a certificate recognizing participation in these On the Job Training sessions.
    Attendance may also qualify as a Continuing Knowledge Activity for the PEO PEAK program

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