Topic: Watershed Delineation

[mt_philly]

Short and sweet...I want to run a reverse water drop.

The details...is it possible to calculate the watershed to a particular location that is not the bottom of the basin. My watershed covers over 15,000 acres and the proposed bridge loc is in the middle of a sub-basin. i created my surface from USGS DEMs and ran a watershed delineation. I then manually combined all the sub-basins and delineated the lower portion of the basin to exclude the areas that drain downstream of the bridge loc.

Shouldn't I be able to say "here's a point on my surface; calc the watershed to this point" in Land Desktop, or is there a way and I'm just missing it?

LDT 2007, Civil Design 2007 (and Civil 3D 2007, but dragging my feet on that one).

Thanks in advance!

[mjfarrell]

one might try a HIDE boundary around your area of interest, then the watershed should limit itself to this area of interest

in C3d, an outer boundary

[mt_philly]

Sorry, I'm not understanding why that would work (using the bridge footprint as a hide bndry), but I tried it and ended up fatal erroring out when I tried to import the watershed boundaries - twice - aarrrgh...so frustrating.  I had another suggestion from another forum - creating a volume surface and running a waterdrop on that - will give that a go and see what I end up with.

Thanks helping me work thru this!

Judy

[Kerry]

I thought Jeff Paulsen's solution was pretty good.