Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

The January 17, 1994 Northridge earthquake in the Los Angeles area caused substantial fluctuations in the influent flow to the Hyperion treatment plant (HTP), lasting almost a full day after the quake. Four reasons for these fluctuations have been identified: 1. The seismic wave momentarily displaced a portion of the influent wastewater collection system; 2. The HTP barscreens were twice blinded by the arrival of debris such as rags and grease shaken loose in that portion of the system; 3. The Los Angeles Glendale Wastewater Treatment Plant (LAG) upstream of HTP came offline and resumed treatment twice; 4. The Donald C. Tillman Wastewater Treatment Plant (DCT), which is even further upstream and near the epicenter, came off-line and resumed service once. The timing of these events relative to the flow fluctuations at HTP must be understood in terms of both surface wave (celerity) and normal flow velocity. These results provide insight into the hydrodynamics of a large collection system that could be useful in the design, testing and analysis of such systems, particularly with regard to storm surges. This presentation describes the successive events, their interpretation, and the methodology of the analysis.
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: 2000-01-01

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 These proceedings are not peer reviewed.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