Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Each year, many miles of new or rehabilitated sewer lines or pumping stations are designed and constructed based on flow criteria that may be unrelated to the desired level of system performance. Because of the need to reduce the risk of sanitary sewer overflows and sewer backups into buildings, it can be beneficial to re-examine the basis of sewer hydraulic design. Traditional approaches such as the 10 States Standards, individual state sewer design criteria, and sewer agency in-house design criteria may need to be updated. This paper reviews design criteria, design flow curves, and methodologies used to develop updated design curves. It is important because it provides guidance to utilities relative to review of their design flow criteria and can result in improved long-term system performance.

In many systems, inflow is the most critical flow component and may represent 60 to 95 percent of the total peak flow rate under “peak” or design flow conditions. Little guidance is provided in design manuals regarding the development of design curves when inflow is a significant part of the total flow. Many agencies use standard curves to develop design flows that have been empirically developed, or based on the literature, which show ratios of peak and minimum flows to average daily wastewater flow, population or tributary area. These curves are useful guides, but every collection system (and subsystem within it) has its own characteristic flow curve.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2007-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more