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These reports detail the scope, methods, and results of a program of monthly sampling and analysis of nutrients and plankton in both Quabbin and Wachusett Reservoirs conducted from October 1998 through September 1999, which continue, with some modifications, on a quarterly schedule to the present day.
Laboratory measurement of nutrient concentrations was performed by MWRA staff of the Deer Island Central Laboratory. The spatial coverage of the program (six stations at Quabbin, four stations at Wachusett, each sampled at various depths) and frequency of sampling, combined with the efficacy of laboratory measurements provides the most comprehensive database currently available on nutrient and plankton dynamics in both reservoirs.
Major findings at Quabbin Reservoir include:
Major findings for Wachusett Reservoir include:
Also presented in the Wachusett report is a review of plankton data generated independently from the following sources:
Additionally, the DCR provides a detailed characterization of the Quabbin "interflow," a hydrodynamic phenomenon resulting from the annual transfer of water from Quabbin Reservoir to Wachusett via the Quabbin Aqueduct. Finally, this report integrates historical nutrient and plankton records and related information generated from numerous consultant studies of Wachusett Reservoir.
Nutrient and Plankton Dynamics in Quabbin Reservoir
Nutrient and Plankton Dynamics in Wachusett Reservoir
Quabbin Interflow - Downstream