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Flow (System Sanitary) or Flow (Known) for steady state

Hi

For a small sanitary network which has some service connections, steady state design should be done based on Flow (dry-System Sanitary) or Flow (Known)?

What is difference between both flows?

Thanks

 

Hamid

  • Hamid,

    This wiki will explain known flows:

    https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/14202.understanding-known-flows

    The Flow (dry-System Sanitary) sounds like a reported field that would tell you the dry weather system sanitary flow that are being routed in the system. I'm saying it sounds like this is what it is because I can't find that exact field you are speaking of.

    The main difference between this field and the known flows is the Flow (dry-System Sanitary) are additive whereas an entered known flows overwrites known flows from upstream.

    Regards,
    Mark

    Mark

    Answer Verified By: Hamid.AKbari 

  • To supplement what Mark said, usually you would design for peak flow conditions, typically using Extreme Flow Factors. These are modeled with Unit Load-based dry weather flows that are typically based on average conditions, with a peaking factor applied for design. Quick Start lesson 1 in the Help documentation explains the process of adding unit loads and extreme flow factors.

    You can also find some general modeling advice in our Wastewater Collection System Modeling and Design book:

    http://pages.info.bentley.com/books/?Book=Wastewater%20Collection%20System%20Modeling%20and%20Design


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.