Physical dynamics controlling variability in nearshore fecal pollution: Fecal indicator bacteria as passive particles
Authored by M A Rippy, P J S Franks, F Feddersen, R T Guza, D F Moore
Date Published: 2013
DOI: 10.1016/j.marpolbul.2012.09.030
Sponsors:
United States Office of Naval Research (ONR)
United States National Oceanic and Atmospheric Administration (NOAA)
United States National Science Foundation (NSF)
California Sea Grant
Platforms:
MATLAB
Model Documentation:
Other Narrative
Mathematical description
Model Code URLs:
Model code not found
Abstract
We present results from a 5-h field program (HB06) that took place at
California's Huntington State Beach. We assessed the importance of
physical dynamics in controlling fecal indicator bacteria (FIB)
concentrations during HB06 using an individual based model including
alongshore advection and cross-shore variable horizontal diffusion. The
model was parameterized with physical (waves and currents) and bacterial
(Escherichia coli and Enterococcus) observations made during HB06. The
model captured surfzone FIB dynamics well (average surfzone model skill:
0.84 \{E. coli) and 0.52 \{Enterococcus)), but fell short of capturing
offshore FIB dynamics. Our analyses support the hypothesis that surfzone
FIB variability during HB06 was a consequence of southward advection and
diffusion of a patch of FIB originating north of the study area.
Offshore FIB may have originated from a different, southern, source.
Mortality may account for some of the offshore variability not explained
by the physical model. (C) 2012 Elsevier Ltd. All rights reserved.}}, Publisher = {{PERGAMON-ELSEVIER SCIENCE LTD
Tags
California
Escherichia-coli
Zone water-quality
Surf-zone
Sunlight inactivation
Huntington-beach
Budget analysis
Lake-michigan
Marine beach
Enterococci