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Suspended sediment and organic contaminants in the San Lorenzo River, California, water years 2009-2010

Open-File Report 2011-1120

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Abstract

This report presents analyses of suspended sediment and organic contaminants measured during a two-year study of the San Lorenzo River, central California, which discharges into the Pacific Ocean within the Monterey Bay National Marine Sanctuary. Most suspended-sediment transport occurred during flooding caused by winter storms; 55 percent of the sediment load was transported by the river during a three-day flood in January 2010. Concentrations of polyaromatic hydrocarbons can exceed regulatory criteria during high-flow events in the San Lorenzo River. These results highlight the importance of episodic sediment and contaminant transport in steep, mountainous, coastal watersheds and emphasize the importance of understanding physical processes and quantifying chemical constituents in discharge from coastal watersheds on event-scale terms.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Suspended sediment and organic contaminants in the San Lorenzo River, California, water years 2009-2010
Series title:
Open-File Report
Series number:
2011-1120
Year Published:
2011
Contributing office(s):
Pacific Coastal and Marine Science Center
Description:
iv, 24 p.; Tables Folder
Time Range Start:
2008-10-01
Time Range End:
2010-09-30
Online Only (Y/N):
Y
Additional Online Files(Y/N):
Y