Denitrification and nitrogen transport in a coastal aquifer receiving wastewater discharge

Article Abstract:

Active populations of denitrifying bacteria were detected in a nitrogen-enriched groundwater plume, resulting in in situ nitrogen transformations in the anoxic and surrounding suboxic zones of the plume. Despite the presence of active denitrification, there was a minimal loss of fixed nitrogen and little attenuation of nitrogen during transport through the aquifer because of the lack of electron donors in the anoxic zone. These were the results of a study of denitrification and nitrogen transport in a sandy glacial aquifer receiving wastewater from a septage-treatment facility on Cape Cod, MA.

Sewage, Aquifers, Denitrification

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Coliform contamination of a coastal embayment: sources and transport pathways

Article Abstract:

Bacterial contamination is the leading cause of pollution in several parts of the country, resulting in human and economic losses. There are several sources of bacterial contamination. In coastal embayments, fecal coliform (FC) is the major source of contamination. FC densities are associated with short-duration rain events and reach their peak with the elution of bacteria from shoreline deposits of decaying vegetation. The transport pathways of bacterial contamination in coastal waters should provide insight in the development of remediation methods.

Evaluation, Pollution, Bioremediation, Water pollution, Coasts

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Nutrient balance of a Massachusetts cranberry bog and relationships to coastal eutrophication

Article Abstract:

The influence of cranberry wetland agriculture on the nutrient balance of coastal watersheds along Buzzards Bay, MA, was investigated. Nitrogen macronutrient inputs and outputs through both natural and agricultural pathways were measured as well as the nutrient transformations within the bog system. The measured nutrient losses were then compared to other freshwater wetlands and alternative land-uses. Nutrient losses to the cranberry wetlands were found to have a strong seasonality.

Wetlands, Cranberries, Eutrophication, Bogs

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