Dividing Surface into 2 uneven surfaces

Hello Everyone,

i am trying to divide a surface. My plan was to use divide Domain² and then combine surface till i get the this Picture below.

It looks like this currently

Any help is appreciated.
Kind regards

Surface_error.gh (9.3 KB)

Like this?

Surface_error_re.gh (13.7 KB)

Thanks HS_Kim for your response.

Actually it should be the lowest point on the circle in the middle. Then a horizontal line from there till the right end.


The point on the outer circle isn’t vertical right now and it’s not on the surface.

Surface_error2.gh (10.9 KB)

Surface_error2_re.gh (13.6 KB)