Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Dye-dilution testing of sewage flow is being used in the Metropolitan Detroit area to obtain highly accurate flow rate estimates to verify meter accuracy. The types of flow meters being verifiedinclude: Parshall flumes; Palmer-Bowlus flumes; Leopold Lagco flumes; magnetic flow meters ("magmeter"); and multi-path area-velocity meters. Often, these sewage flow meters are used for billingpurposes, and meter accuracy is important for proper calculation of sewer bills. Dye-dilution testing also is useful for verification of pump performance curves.

A dye-dilution testing procedure was established in 1996 by a Flow Metering Task Force that was organized by the Detroit Water & Sewerage Department (DWSD). The established dyedilution testing procedure involves injection of a known concentration of fluorescent dye into the sewage flow in an upstream manhole and withdrawal of a stream of sewage from a downstream manhole. This procedurerequires suitable upstream and downstream manholes in series with the flow meter and no active sewer connections at or between the manholes. The withdrawn sewage is filtered and pumped through tubing into a fluorometer and a spectrophotometer. The fluorescent dye is well mixed in the sewagein the sewer reach between injection and withdrawal manholes. The sewage flow rate is related tothe dilution of the dye and is compared to the flow rate estimated by the sewage flow meter.

An improved, alternative dye-dilution testing procedure was developed that simplifies and significantly lowers the cost of performing dye-dilution testing by using an in-situ fluorometer/turbidity meter apparatus and provides highly accurate flow rate estimates similar to the established procedure. The in-situ apparatus is compact and may be inserted in the sewage flow in the downstream manhole/meter chamber and sewage withdrawal at the downstream manhole is not necessary. Consequently, the alternative procedure can be applied to sewage flow meter installations that otherwise do not have suitable downstream manholes.
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: 01 January 2006

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