Cannot drape a surface

[marceltanure]

Some how I cant drape it? I could drape the biggest half part of the curve but now I cant drape this other part. Why?

lake.skp (1.6 MB)

[kenancakir]

There is nothing to drape in your model, it is just a surface..

[marceltanure]

I need to make a projection of that curved welded line into the grass surface.

[kenancakir]

The problem is in that part, there is a gap on the left side.. Close the gap and you can select areas.