That portion of the water previously diverted from a stream, and subsequently, returned to that stream or to another body of ground or surface water. It may or may not return to the stream channel at some point downstream. That instantaneous discharge required to prevent death of an aquatic organism in a stream during specified short periods of time of extremely low flow. That type of flow in which any particle of water may move in any direction with respect to any other particle. Uniform Flow A flow in which the velocities are the same in both magnitude and direction from point to point.
Uniform flow is possible only in a channel of constant cross section and gradient.
The natural flow of a stream without regulation, control, diversion, or artificial additions. Duration Curve A cumulative frequency curve that shows the percentage of time that specified flows are equaled or exceeded. Flow, Steady Flow at constant discharge. Flow, Unsteady Flow on rising or falling stages. Flow, Varied Flow in a channel with variable section.