Hi, I am modelling a 1,2 km small mountain stream in a 2D model only, but I am facing some weird problems. I am using a unsteady flow data, but even when I try to insert a constant hydrograph, the water surface oscilates like a wave, and when I plot the WSE on the river profile, everything stays with the same water elevation. The images show the WSE on the river profile and the oscilation of the WSE on a point in the channel. I tried a lot of things, but don’t know what is the problem. Does someone already had this problem or may have an ideia of what is the problem?

