SS4.13 Water Quality of Lakes, Rivers and Coastal Zones
Date: Thursday, June 13, 2002
Time: 11:15:00 AM
Location: Carson B
 
JiangS, University of California, Irvine, USA, sjiang@uci.edu
Chu, W, , University of California, Irvine, USA, weipingc@uci.edu
 
URBAN RUNOFF IS A SOURCE OF HUMAN VIRAL CONTAMINATION TO SOUTHERN CALIFORNIA RECREATIONAL BEACH WATERS
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This study presents evidence that urban runoff is a likely source of human viral contamination to beach waters. Three types of human viruses, including adeno, entero and hepatitis A virus, together with coliphage and standard bacterial indicators were tested in urban waterways of Southern California. Over 50% of the waterways examined were positive for at least one type of human virus by polymerase chain reaction. The occurrence of human viruses in beach waters near the mouths of rivers and creeks displayed a seasonal pattern. Higher frequencies of detection were found during the winter wet season and following storm events. However, there was no clear correlation between indicators and human viruses. The results and implications of this study are valuable for making decisions involving coastal resource management and establishing total maximum daily load for urban waterways.