How to segment lake during bathymetry preprocessing when the lake has multiple branches?

[Alyssa Freedman]

Hi all,

I am working with a lake that needs to be split up into sections because it has multiple branches, as you can see from the attached contour plot. I would like to examine lake bathymetry grids for each section of the lake.

In the PITLAKQ tutorial, I only see an example with one sub-lake. Does anyone know how to segment the lake into multiple sections in PITLAKQ? 

Ultimately, I would like to produce a bathymetry grid like the one shown below at each individual section of the lake.

I've also included an attachment showing an idea of how I'd like to segment the lake. I'm looking to create a grid at each segment I circled.

Thank you so much for any help you can provide!