In this space, I include the results of scientific investigations into the sources, fate, and transport of pathogens (and their indicators) in Newport Bay, California. These studies were funded by a grant from the State Water Resources Control Board, with matching funds from the County of Orange, in support of the fecal coliform total maximum daily load (TMDL) program.
 | Newport Bay, California: "Wetland of International Importance" (Ramsar Convention) |
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- Breeding and nesting area for rare and endangered birds (Light Footed Clapper Rail)
- Total Maximum Daily Loads (TMDLs):
- Fecal Coliform (pathogens)
- Nutrients (algal blooms-Enteromorpha)
- Sediments
- Toxic pollutants (heavy metals)
Top five causes of water quality impairment in the US (EPA 303(d) listings, 1996-2006):
| Reason for impairment | Number of Total Maximum Daily Loads |
|---|
| Heavy metal pollution | 3936 |
| Microbial pollutants and pathogens | 3603 |
| Nutrients | 2198 |
| Sediments/siltation | 1709 |
| Organic enrichment, dissolved oxygen | 1264 |
Beach Boundary Layer Model (BBLM)
BBLM Predictions:
- Pollutant concentration decreases logarithmically with increasing distance offshore or depth (consistent with obs).
- Pollutant concentration in ankle deep waters along the shoreline can be estimated with a simple formula.
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Application of BBLM to OCHCA Monitoring Sites
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