Anyone know if there is a software solution to watershed delineation? In other words, a software program that will automatically delineate a watersheds boundaries? I've always done this manually, but I'm submitting a bid for a job to analyze approximately 250 small watersheds (about 10-25 acres each in size) and know a software solution with field verification would go a long way into landing this contract.
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http://www.globalmapperforum.com/features/watershed-delineation-tool/
DDSM:beer::beer::beer:
Try Streamstats from USGS
[REDACTED]($), ArcMap($$), Civil 3d($$), QGIS(Free), and others.
Streamstats(Free) will do it, but it's pretty basic and the underlying DEM might not meet your needs.
Your results will depend on the quality of your DEM of course.
I'm not 100% positive because I have not used it in awhile, but I think MicroDEM will do that. It's free and I seem to remember that some of the routines could tend to be glitchy depending on what you were asking it to compute. It did do some neat things with DEMs.
Supposedly Carlson's Hydro software could do this, but I was unable to get the software to work and unfortunately support was unable to get it working either.
10-25 acres in size is pretty dang small for a watershed....
Carlson Civil Suite Hydro module will show drainage areas
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I appreciate the leads! Yes, 20-25 acres is pretty small, but that's the typical size of a drainage outfall for a subdivision up in this neck of the woods.
Mark O, post: 373027, member: 11591 wrote: I appreciate the leads! Yes, 20-25 acres is pretty small, but that's the typical size of a drainage outfall for a subdivision up in this neck of the woods.
You may find that given the small scale of the watershed, you will be unable to find an automated software routine that will accurately delineate the watershed without detailed surface data.
I highly doubt that the USGS 10 meter DEM files will suffice.
Maybe if your area has LIDAR data available, or there are accurate topo's for the subdivisions that you will have confidence/license to utilize?
I believe the town has two foot contours they will provide to the winning bidder.
You don't want contours, you want the surface model from which the contours were approximated.
I'll take either. I figure I can always create a new model from the contours. As long as they're not raster (I started another thread about .pdf to vector)
Mass has lidar coverage for most of the State.
http://www.mass.gov/anf/research-and-tech/it-serv-and-support/application-serv/office-of-geographic-information-massgis/datalayers/lidar.html