Thayer, Thank you for the suggestion; I just tried it with the same result. I think the area just happens to be a difficult area, that is pretty flat…
Cheers! Tom On Fri, Feb 13, 2015 at 1:54 PM, Thayer Young <[email protected]> wrote: > I don't know if you have tried this yet, but you may also want to look at > r.terraflow. It does both D8 (single flow direction) and multiple flow > direction (flow is partitioned, according to the steepness of slope, to all > directions that are lower than the central cell). Supposedly you can also > switch from MFD to SFD once flow exceeds a threshold, but I have not been > successful at doing this. It would be a simple simulation of > channelization though. > > Just set the D8 flag in the options tab, otherwise it will give you MFD by > default. > > -Thayer > > > ------------------------------ > Date: Fri, 13 Feb 2015 11:12:30 -0700 > From: Thomas Adams <[email protected]> > To: "[email protected]" <[email protected]> > Subject: [GRASS-user] Question about r.watershed and flow accumulation > grid > Message-ID: > <cagxgkwgefettcjzwki3jp8wj79eb0j3fzsf6hgzt8m9-dgc...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hello all! > > I'm making use of the flow accumulation grid in GRASS 6.4.5 generated from > r.watershed using the SFD (D8) flow algorithm. The DEM has a 250m spatial > resolution. What I'm getting is a break in the flow accumulation in a few > locations which is causing me serious problems with subsequent processing > (with help from some here, I have put together some scripting to generate a > pixel connectivity file for a distributed hydrologic model). > > Besides going to a higher resolution DEM, are there any thoughts as to how > I can eliminate these flow accumulation breaks? > > Thank you, > Tom > > -- > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.osgeo.org/pipermail/grass-user/attachments/20150213/9306343f/attachment-0001.html > > > > -- Thomas E Adams, III 718 McBurney Drive Lebanon, OH 45036 1 (513) 739-9512 (cell)
_______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
