Eutrophication and Pathogen Abatement in the San Juan Bay Estuary

The San Juan Bay Estuary is a tropical lagoon system severely impacted by eutrophication and by elevated pathogen concentrations. This investigation examined alternatives for pollution abatement primarily through physical modifications to the system. The investigation included field surveys, computa...

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Bibliographic Details
Published in:Journal of environmental engineering (New York, N.Y.) N.Y.), 2003-04, Vol.129 (4), p.318-327
Main Authors: Cerco, Carl, Bunch, Barry, Dortch, Mark, Johnson, Billy, Kim, Keu
Format: Article
Language:English
Subjects:
Applied sciences
Brackish
Computation
Computational fluid dynamics
Constrictions
Control equipment
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental engineering
Estuaries
Estuarine environments
Eutrophication
Exact sciences and technology
Fluid flow
Hydrodynamics
Lagoons
Modification
Monitoring
Natural water pollution
Nutrients
Pathogens
Pollutants
Pollution
Pollution abatement
Pollution, environment geology
Puerto Rico, San Juan Bay
Seawaters, estuaries
Sediments
TECHNICAL PAPERS
Water quality
Water treatment and pollution
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Summary:The San Juan Bay Estuary is a tropical lagoon system severely impacted by eutrophication and by elevated pathogen concentrations. This investigation examined alternatives for pollution abatement primarily through physical modifications to the system. The investigation included field surveys, computation of pollutant loads, and application of hydrodynamic and eutrophication models. A eutrophication model developed for temperate estuaries was successfully transferred to San Juan Bay Estuary. Results indicate two primary modifications reduce eutrophication. The first clears a constricted channel to the interior of the system and promotes flushing. The second fills deep holes in which anoxic conditions promote sediment nutrient release to the water column. Major reductions in pathogen concentration require regional controls on sources.
ISSN:0733-9372
1943-7870
DOI:10.1061/(ASCE)0733-9372(2003)129:4(318)