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Energy Grade Line (EGL)

A line that represents the elevation of energy head of water flowing in a pipe, conduit, or channel. The line is drawn above the hydraulic grade line (gradient) a distance equal to the velocity head of the water flowing at each section or point along the pipe or channel. See Also: Stratified Bed Hydraulic Grade Line United States Pharmacopeia (USP) WFI Slope Conventional Filtration Turnover Hydraulic Grade Line Alkylaryl Sulfonate Alkylbenzene Sulfonate (ABS) Hypolimnion Direct Filtration Epilimnion