Culvert modelling process

Hello

I have the following doubt: It looks like if I want to model a culvert through a dyke, using the Mike 21/3 model, I would have to carve  the river bed in the bathymetric data of the embankment (see attached figure).  I think is not possible modelling the culvert without altering the scatter data. This would mean that if I want to model alternatives where I use 2  and 3 culverts, I would have to modify the bathymetry for each case and the resolution of my mesh has to be as low as the width of the culvert .

Am I understanding the process correctly?

Do you have dimention of your culverts?
It might be better to model  ur culverts in Mike 11 and link it to Mike 21 by Mike Flood .

I'm struggling with the same kind of issue, so if you figure out a good way of doing this let me know! I've tried linking in Mike11 but can't get things to stabilize.

Just to let people know that  I confirmed on my own that's how it works. THe culvert feature only models the hydraulic head loss caused by the culvert inlet, but you have to carve the opening in the scatter data.

I don't have access to other Mike licenses so I ended up carving the culvert opening

How is it possible to solve this problem only in MIKE21?