Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Huntington Beach Shoreline Contamination Investigation. Phase III. Coastal Circulation and Transport Patterns: The Likelihood of OCSD's Plume Impacting the Huntington Beach Shoreline. Final Report
In July 1999, the Orange County Health Care Agency (OCHCA) began a series of beach closures in Huntington Beach, California, due to levels of total coliform, fecal coliform, and enterococci bacteria that exceeded newly applied beach sanitation AB411 standards. (The actual implementation date for AB411 was July 27, 1999.) The OCHCA began closing beaches on July 3, 1999, because the level of contamination was thought to be of sewage origin, and was indicative of human sewage contamination. Since that time, surfzone bacterial levels from Orange County Sanitation District's (OCSD) monitoring stations located north of the Santa Ana River and, in particular, at sites near and adjacent to the AES Corporation's Huntington Beach power generation plant have continued to exceed the AB411 standards on some days during the summer. Beginning in 1999, many land, estuarine, and coastal ocean-based studies were conducted to identify the source or sources of the bacteria. These investigations suggested that the elevated bacteria levels occurred primarily during late spring and summer and coincided with periods of maximum tidal range (i.e., spring tides). Grant et al. (2000) identified the offshore wastewater discharge from OCSD's outfall as a potential source for the observed shoreline contamination and hypothesized that this wastewater could be impacting the shoreline as the result of oceanographic processes such as internal waves, entrainment by the thermal discharge from the AES Corporation power plant, or a combination of both (i.e., the 'UCI Hypothesis'). In the summer of 2001, an extensive coastal ocean measurement program was undertaken to determine if a significant amount of bacteria from the outfall was transported to the adjacent shoreline. This project was the Huntington Beach Shoreline Contamination Investigation, Phase III (HB PIII) of the Orange County Sanitation District's investigation of possible sources of the bacteria found on Huntington Beach. This report is a summary of the results of the Phase III investigations.
Huntington Beach Shoreline Contamination Investigation. Phase III. Coastal Circulation and Transport Patterns: The Likelihood of OCSD's Plume Impacting the Huntington Beach Shoreline. Final Report
In July 1999, the Orange County Health Care Agency (OCHCA) began a series of beach closures in Huntington Beach, California, due to levels of total coliform, fecal coliform, and enterococci bacteria that exceeded newly applied beach sanitation AB411 standards. (The actual implementation date for AB411 was July 27, 1999.) The OCHCA began closing beaches on July 3, 1999, because the level of contamination was thought to be of sewage origin, and was indicative of human sewage contamination. Since that time, surfzone bacterial levels from Orange County Sanitation District's (OCSD) monitoring stations located north of the Santa Ana River and, in particular, at sites near and adjacent to the AES Corporation's Huntington Beach power generation plant have continued to exceed the AB411 standards on some days during the summer. Beginning in 1999, many land, estuarine, and coastal ocean-based studies were conducted to identify the source or sources of the bacteria. These investigations suggested that the elevated bacteria levels occurred primarily during late spring and summer and coincided with periods of maximum tidal range (i.e., spring tides). Grant et al. (2000) identified the offshore wastewater discharge from OCSD's outfall as a potential source for the observed shoreline contamination and hypothesized that this wastewater could be impacting the shoreline as the result of oceanographic processes such as internal waves, entrainment by the thermal discharge from the AES Corporation power plant, or a combination of both (i.e., the 'UCI Hypothesis'). In the summer of 2001, an extensive coastal ocean measurement program was undertaken to determine if a significant amount of bacteria from the outfall was transported to the adjacent shoreline. This project was the Huntington Beach Shoreline Contamination Investigation, Phase III (HB PIII) of the Orange County Sanitation District's investigation of possible sources of the bacteria found on Huntington Beach. This report is a summary of the results of the Phase III investigations.
Huntington Beach Shoreline Contamination Investigation. Phase III. Coastal Circulation and Transport Patterns: The Likelihood of OCSD's Plume Impacting the Huntington Beach Shoreline. Final Report
2004
346 pages
Report
Keine Angabe
Englisch
Huntington Beach Oceanographic Studies
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