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Temporal and spatial patterns for surf zone bacteria before and after disinfection of the orange county sanitation district effluent

By:
, , , , and
DOI: 10.1109/OCEANS.2005.1639793

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Abstract

Data from pre- and post-disinfection fecal indicator bacteria (FIB) samples from final effluent, an offshore ocean outfall, and surf zone stations off Huntington Beach, CA were compared. Analysis of the results from these data sets confirmed that the ocean outfall was not the FIB source responsible for the postings and closures of local beaches that have occurred each summer since 1999. While FIB counts in the final effluent and offshore showed several order of magnitude reductions after disinfection, there were no significant reductions at the nearby surf zone stations. Additionally, the FIB spectral patterns suggest different sources. The dominant fortnightly cycle suggested that the source was related to the wetting and draining of the land from large spring tide tidal excursions.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Temporal and spatial patterns for surf zone bacteria before and after disinfection of the orange county sanitation district effluent
ISBN:
0933957343; 9780933957343
DOI:
10.1109/OCEANS.2005.1639793
Volume
2005
Year Published:
2005
Language:
English
Larger Work Title:
Proceedings of MTS/IEEE OCEANS, 2005
Conference Title:
MTS/IEEE OCEANS, 2005
Conference Location:
Washington, DC
Conference Date:
18 September 2005 through 23 September 2005