Los Angeles Infiltration/Inflow Reduction Programby Robert A. Parent, CH2M Hill, San Francisco, CA, USA,
Abstract: The City of Los Angeles maintains and operates two wastewater collection and treatment systems: the Hyperion System and the Terminal Island System. During the wet months of December through March, moderate to heavy rainfall causes the major interceptors to surcharge in long reaches of the system and overflow at many specific points, particularly in the Hyperion System. These capacity problems are caused by excessive levels of infiltration/inflow (I/I). This paper presents the analytical techniques and procedures used to identify areas with excessive I/I levels, concentrating on the Hyperion System.
Subject Headings: Infiltration | Wastewater treatment | Overflow | Islands | Water flow | Rainfall | Urban areas | North America | California | Los Angeles | United States
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