Brick Township NJ constructed an 860 million gallon pumped raw water storage reservoir.rn100% of the water and nutrients were imported over a four month period during the initial fillrnin 2004. An examination of relative costs of pumping to the reservoir vs. using the riverrndirectly indicated that transfer is more cost-effective despite pumping costs. The reservoirrnfunctions as a “first step in the water treatment process”. This presentation reviews therndevelopment of ecological communities, raw water quality, and operational managementrnduring the first six years. Reservoir design included depth-selective withdrawal, Layer Aeration,rnchemical treatment capability through aerators, and source river flow stage selection.rnStorage of River water involves water quality challenges (DBP precursors, iron andrnmanganese, suspended solids, taste and odor compounds, and nutrient loading). TPrnconcentrations have become relatively stable in a “lower mesotrophic range”. Sparserndistribution of attached algae (e.g. Oscillatoria sp.) were identified by SCUBA. Anatoxin,rnCylindrospermopsin, Microcystin, and Saxitoxin were very low or non-detect. Secchirntransparency increased and become more stable through time. Intake selection avoids thernhigher epilimnetic algae densities. The reservoir is beginning to exhibit typical seasonalrnsuccession of algae. Full circulation diffuser modules are operated in the spring to enhance thernDiatom peak and delay the shift to Green Algae and Cyanobacteria, resulting in a 3 fold increasernin Diatoms and 75% decrease in Cyanobacteria. Ongoing efforts focus on maintaining Nitrate-Nrnavailability for assimilatory and dissimilatory reduction.
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