What is the term for pressure measured in terms of the height of water?

The term for pressure measured in terms of the height of water is "Head." In fluid mechanics, "head" refers to the height of a column of water that would produce the same pressure at the bottom as the pressure being measured. This is typically expressed in units such as feet or meters.

Understanding "head" is fundamental in hydraulic engineering because it helps to quantify how much potential energy is available in a water system, which can then be converted into flow or pressure. By measuring head, engineers can determine how to effectively manage water distribution and ensure that pressure levels maintain adequate supply throughout a system.

Static pressure refers to the pressure of a fluid at rest; while hydrostatic pressure is the pressure exerted by a fluid at equilibrium due to the gravitational field acting on it. Dynamic pressure, on the other hand, is associated with the flow of fluids and is related to the motion of the fluid itself. Each of these terms has its importance in different contexts, but "head" specifically relates to the measurement of pressure via the height of water.