Skip to main content

SANITARY SEWER OVERFLOW MONITORING, DATA ANALYSIS AND RESPONSE PROCEDURES

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

The City of Edmonton, Asset Management and Public Works Department, Drainage Services has developed an Interconnection Control Strategy to eliminate or minimize the discharge of sanitary and combined sewerage to the storm sewer system, and subsequently to the North Saskatchewan River. These discharges would be defined as Sanitary Sewer Overflows in the United States. The Interconnection Control Strategy has evolved to focus on monitoring sanitary sewer to storm sewer interconnection activity. In 1997, the City implemented a comprehensive monitoring program, using virtual level gauges (VLGs) at about 180 active interconnection sites. Since 1998, the City downloads data on a weekly basis from these VLGs through remote communication technologies.

Monitoring data are reviewed and analyzed in order to estimate overflow frequency and duration of overflows at these interconnections. If the site is identified as active during dry weather flow conditions, the City's operations crew is notified immediately to investigate and confirm the overflow activity. They are also required to collect water samples, release any blockages that may be found in the sewer line and report to the provincial regulator.

Results obtained from the monitoring program are also utilized to quantify interconnection activity, to support sewer system assessment and for prioritization of remedial works. For the five year period between 1997 and 2001, an average of 69% of the City's interconnections were found to be inactive each year. About 29% of the interconnection sites are active each year under various levels of wet weather flow and 3% overflow on at least one occasion during dry weather.

This paper presents the features of the montioring program to quantify sanitary sewer overflows. It also provides an overview of the current response procedures to interconnections with dry weather overflow, and outlines the correction and assessment work plan for interconnections.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864702785300863

Publication date: 2002-01-01

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.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree 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