One of the most important subjects in river engineering is design of stable channel section. Various cross sectional shape equations have been proposed to describe the bank profiles of straight threshold channels. In this paper, a new method has been developed in which; cross section deformation is simulated in different times. In steady and uniform condition, in absence of outside influences, a channel attains to stable shape. Final stabilized cross section computed by developed method was compared with other methods and experimental data. A total of 34 sets of data in two series of experiments were used. New method agrees with theoretical and experimental stable shape.

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