ABSTRACT
The word “hydraulic” is derived from the Greek words “hydro” (meaning water) and “aulis” (meaning pipe). Originally, “hydraulics” referred only to the study of water at rest and in motion (flow of water in pipes or channels). Today it is taken to mean the flow of any “liquid” in a system. Hydraulics-the study of fluids at rest and in motion-is essential for an understanding of how water/wastewater systems work, especially water distribution and wastewater collection systems.
