Please look at these streamlines

[hanson]

Hi all.
From the internet, I found the following picture for streamlines of a solitary wave passing a submersed object.
Do you find these streamlines strange?
And I guess the streamlines for a traveling solitary wave without such a submersed object shall be similar for the upper part?

 

[AiRAVATA]

You are right... There is an analytic way to come with such behavior in ode's. It's called boundary layer.