New Findings in Estimating Flow Rates Through Overflowing Manhole Covers
Abstract:When sewers overflow through manhole covers, the flow rate of the overflow is expected to depend, to some extent, on the head loss through the partly open manhole cover. In this study, the flow rate and head loss was measured through several manhole covers with different weights and number of holes to determine that relationship between head loss and flow. While it is common to model an overflowing manhole as a weir or orifice, this experimental study found that this approximation may not be very accurate. Instead, it was shown that once sufficient head is provided to marginally lift the cover from the casting rim, flows can vary dramatically with only a minor change in head. Experimental results are provided in this paper along with some discussion on the implications for hydraulic models.
Document Type: Research Article
Publication date: 2008-01-01
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 These proceedings are not peer reviewed.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