Hydrograph separations were performed using the PART, HYSEP 1, 2, and 3, BFLOW and UKIH methods on 104,293 years of daily streamflow records from 3,936 streamflow-gaging stations in Ontario, Canada and the
Abbreviated water-quality units used in this report: Chemical concentrations for Chlorophyll a and phosphorus are given in micrograms per liter (µg/L). Micrograms per liter is a unit expressing the concentration of chemical constituents in solution as a weight (micrograms) of solute per unit volume (liter) of water.
Mr. Ralph Bednarz of the Michigan Department of Natural Resources and Environment and the volunteers of the Cooperative Lake Monitoring Program (CLMP) were invaluable in providing much of the field data used in the project. Leif Olmanson of the Remote Sensing and Geospatial Analysis Laboratory, Department of Forest Resources, University of Minnesota provided the Gethist program for use in analyzing Michigan inland lakes. U.S. Geological Survey (USGS) field technicians provided measurements for the Upper Peninsula of Michigan to supplement the measurements from volunteers of the CLMP. The following USGS Michigan Water Science Center employees were involved in the collection of data for this study:
9. Maps showing spatial distribution of dissolved oxygen and the percentage of the water column below 0.5 and 2.0 milligrams per liter in spring and summer measurements for Michigan inland lakes
While the implementation of enhanced biological phosphorus removal (EBPR) may appear to increase the complexity of the activated sludge process, the improvement and stabilization of activated sludge quality and performance afforded by EBPR actually simplify operational requirements. Moreover, there are design features that can be included to further simplify operation. Presented is a discussion of the design features included in the expansion and upgrade of the Dublin San Ramon Services District Wastewater Treatment Plant, in particular the mixedliquor surface-wasting system for mean cell residence time (MCRT) control. Comparison of operations and performance data before and after the expansion and upgrade project confirm the design intent to simplify operations and improve and stabilize activated sludge quality and performance.
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