Which term describes pressure associated with the flow of water measured in the same direction as that flow?

The term that describes pressure associated with the flow of water measured in the same direction as that flow is velocity pressure. This concept is crucial in hydraulic calculations for sprinkler systems, as it accounts for the kinetic energy of the moving water. Velocity pressure is directly related to the velocity of the water in the pipes; it represents the pressure generated by the motion of the water, rather than the water's positional height (static pressure) or energy resulting from elevation (gravitational pressure).

Understanding velocity pressure is vital for ensuring that the design and installation of the sprinkler system can deliver water effectively to the respective heads during operation, thereby providing adequate fire protection in accordance with the NFPA 13 standards.