Flow Science has extensive experience in the simulation of complex hydrodynamic flows, including heated water discharges, clearwell and tank design, and reservoir hydrodynamic modeling. Water quality improvements may be obtained by the proper design and placement of inlets and outlets, and the installation of baffles and flow control structures at strategic locations within a tank or basin. Historically, the design of such elements relied on experience and intuition. Now, however, computational fluid dynamics (CFD) allows these design decisions to be based on precise, scientific calculations. Flow Science has analyzed the flow in numerous distribution storage reservoirs, clearwells, and basins throughout the United States for the purpose of designing baffles or maximizing water quality.