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hi everyone

I am trying to understand well the option of "Equilibrium sediment discharge" in a simple example.
But I have some doubts, I have a channel of 0.25% slope and Q = 0.075 m3 / s, subcritical flow.
After studying the solution, I realize that it gave me a higher bedload than I expected (50% more) and I also realize that the slope of the channel increased. What I believe given that my only conditions are the flow inlet and free surface in outlet the problem is not able to solve a single solution, as it is determined by the erocion and depth in the outlet.
Reviewing the manual sisyphe indicates that in the input of the flow is these cases is not erocionable "Ebor = 0", which I believe since it is a subcritical flow that the output should not be erocionable, since, with the free surface condition At the exit, the bedload will be determined and thus a balance upstream can be generated.

How can I change this configuration, that there is no evolution in the outlet and there is an evolution in the input?

Thanks