Skip to main content

70% Infiltration in a Sanitary Sewer! Impossible! Step by Step Confirmation of Outrageous Infiltration Values

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

When a total R-value of 0.7 was reported for a major flow basin in an I/I study in the City of Columbus, it raised some eyebrows. A total R value of 0.70 meant that 70% of the rain water falling on the basin was making its way into the sewer system. Most shockingly, the sewer had only a very small section of combined sewer; it was almost entirely a separate sanitary sewer! When these extremely high values were calculated from the flow monitoring data, everybody was skeptical. Questions were asked. Were the flow monitors calibrated accurately? Was flow crossing boundaries? Were the computer programs making the correct calculations? Was there some other hidden error? This paper documents the step-by-step process used to trackdown and confirm this number.

Keywords: Flow Monitoring; Infiltration; Inflow; R value; Rainfall; Sanitary Sewer

Document Type: Research Article

DOI: https://doi.org/10.2175/193864709793847519

Publication date: 2009-01-01

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 These proceedings are not peer reviewed.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
X
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