ABSTRACT
Classification of flows Flows can be classified by two parameters: time and distance 1. the first subdivision is based on consideration of the time scale, clas-
sifying flows as either steady or unsteady, 2. the second subdivision relates to the scale of distance, classifying
flows as either uniform or non-uniform. The majority of flows in open channels will fall into one of the clas-
sifications listed below. Steady or permanent uniform flow. The discharge is constant with
time, and the cross-section through which the flow passes is of constant area. A typical example is that of constant flow through a long irrigation canal with uniform cross-section, free from back water effects.
