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Hi,

I'm trying to make a bed bathymetry with Blue Kenue. There is no problem to generate the mesh but the values of elevations I get with 2D interpolator are unusable.

Is there a special tool or a special way to interpolate between cross sections. I mean I would like to interpolate with strong anisotropy in the channel direction (my cross section are quite far the one from the others).

Thanks

Hi Quentin,

The Blue Kenue interpolator is strictly isotropic.
There is no special tool for interpolation from channel cross sections.
We typically write a small program or script to join the cross sections with resampled lines or create elongated triangles.

Martin

Hello Martin,


Could you give more details about the script you are talking about ?

For example, how do you take into account the curves in the reach ?



Thanks


Mathieu

Hi Mathieu,

It depends on your cross section data...

You could join the points of adjoining cross-sections with lines, re-sample these lines to some appropriate interval and then interpolate values at the resampled points.
Then use those points as source for an isotropic interpolation to your mesh.

Another approach is to create triangles between the points of adjacent cross-sections, save these to a t3s file and then use "Tools->MapObject" to map from your triangulated cross-section mesh to your computational mesh. The interpolation in this case will be linear on each triangle.

As for the curves...
If your cross-section density is high enough to represent the curve then that's what you'll get. If not... well, it's generally unwise to invent data. But if you really insist, you could use splines instead of straight lines to join the cross-sections.

Hope this helps... Martin

OK thanks !