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Identifying Suspended Particulate Matters in an Urban Coastal System: Significance and Application of Particle Size Analysis
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  • Journal title : Environmental Engineering Research
  • Volume 17, Issue 3,  2012, pp.167-174
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2012.17.3.167
 Title & Authors
Identifying Suspended Particulate Matters in an Urban Coastal System: Significance and Application of Particle Size Analysis
Ahn, Jong-Ho;
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In situ particle size spectra are obtained from two sequent cruises in order to evaluate the physical consequences of suspended particulate matters caused by episodic storm runoff from the Santa Ana River watershed, an urbanized coastal watershed. Suspended particles from various sources including surface runoff, near-bed resuspension, and phytoplankton are identified in empirical orthogonal function (EOF) analysis and an entropy-based parameterization (Shannon entropy). The first EOF mode is associated with high turbidity and fine particles as indicated by the elevated beam attenuation near the Santa Ana River and Newport Bay outlets, and the second EOF mode explains the suspended sediment dispersal and particle coarsening at the near-surface plume. Chlorophyll particles are also distinguished by negative magnitudes of the first EOF mode, which is supported by the relationship between fluorescence and beam attenuation. The integrated observation between the first EOF mode and the Shannon entropy index accentuates the characteristics of two different structures and/or sources of sediment particles; the near-surface plumes are originated from runoff water outflow, while the near-bottom particles are resuspended due to increased wave heights or mobilizing bottom turbidity currents. In a coastal pollution context, these methods may offer useful means of characterizing particle-associated pollutants for purposes of source tracking and environmental interpretation.
Empirical orthogonal function;Particle size spectra;Shannon entropy;Storm runoff water;Suspended particulate matter;
 Cited by
Environmental Engineering Research in September 2012,Seo, Dong-Il;

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