MWRA

1.   UMass will calibrate and run the Model for each year from 2000 through 2003, to allow MWRA to fullfill the requirement for its NPDES permit to "update, maintain, and run the three-dimensional hydrodynamic water quality "Bays Eutrophication Model" for the purpose of predicting conditions caused by nutrient limits and the appropriate level of any such limit for the discharge.

2.   UMass will compare the hydrodynamic and water quality model output results to water column and sediment flux monitoring data supplied by the MWRA for the subject year and determine whether seasonal cycles and the range of variability in the data are captured by the model.  Interesting, unusual features or significant events in the results of the subject year’s monitoring data, when compared to other year’s monitoring and model results, as characterized in the relevant water column synthesis reports prepared under the MWRA’s Harbor and Outfall Monitoring  Project, are of special interest and should receive appropriate attention.  Compare monitoring data with model predictions to determine whether the magnitude and spatial and temporal extent of any changes in dissolved oxygen, chlorophyll, nutrient concentrations, organic material flux to the sediment, or other parameters, are similar to predicted changes.

3. Umass will incorporate recent advance in understanding of the processes controlling nutrients and organic material to improve the model's capability to reproduce observations and thus predict nutrient effects. UMass will incorporate advances in modeling techniques.