Definitions for "Dynamic pressure"
The pressure at any point in the irrigation system when the system is functioning. Measured with flow in the line.
air pressure that results from the wind behind the shock front of a blast wave
The increase in pressure above the static pressure that results from complete transformation of the kinetic energy of the fluid into potential energy.
When a pump is operating, the vertical distance (in feet) from a reference point (such as a pump center line) to the hydraulic grade line is the dynamic head.