Determining the difference in elevation between two points in a fluid system, and factoring in fluid density and gravitational acceleration, allows for the computation of the potential energy of the fluid. For example, the difference in pressure between the top and bottom of a water storage tank can be determined using this method. This calculated value is frequently expressed in units of length (e.g., feet or meters of water) and represents the potential energy available to drive flow.
Accurate determination of this pressure differential is crucial for various applications, including the design of pumping systems, pipelines, and hydraulic structures. Understanding this principle enables engineers to select appropriate pump sizes, optimize pipeline diameters, and ensure the structural integrity of systems containing fluids. Historically, understanding and managing this phenomenon has been essential for water supply systems, irrigation, and the development of hydroelectric power.