Hey all!
I am working on a project where I am needing to delineate subwatersheds that take into account agricultural tile drainage lines.
I've done a bit of research, but nothing I've found quite gets what I'm after. I don't need to find the tiles; I already have a line dataset that represents the public tile drainage system. The problem is that these tile systems can cross typical surface-flow watershed boundaries. I'd like to create my own subwatersheds and have the tiles be taken into account.
Anyone know of how I might be able to accomplish this? See my example below: blue line is NHD, green line is tile, pink is existing HUC8, and yellow area shows drainage direction (and my guess on what should be added to the area to take into account the subsurface drainage).
Thanks,
Annina
