Hi Matt, Just finished my lessons at this minute – in Hydrology ☺ We use DTM Create:
· Hillshade with factor 2 · Use Fill Sinks (Wang& Lui) on DTM · Create a bluespot in Rastercalculator FilledDEM – DTM. Style and set transparency to 0 · Use Channelnetwork & Drainage Basin to create Watershed basins and Streams (– The factor is set to 5 – if you want a more dense streamnetwork use a smaller factor.) Style/Graduate the streams by the attribute ‘Order’. Style Categorize the Watershed Basins Hope these few lines can help ☺ Regards Lene Fischer Associate Professor Department of Geosciences and Natural Resource Management University of Copenhagen MOB +45 40115084 [email protected]<mailto:[email protected]> [cid:[email protected]] Fra: [email protected] [mailto:[email protected]] På vegne af Matt Boyd Sendt: 14. august 2015 10:04 Til: qgis-user Emne: [Qgis-user] Hydrology Hi List, I need to work out some channels and hydrology things from a topography DEM. I've done a little bit of this before but if there's a how to or a tutorial on the correct process / work flow that someone could point me at I'd appreciate it. Basically I need to work out that if I have rainfall in an certain area, how much of it makes its way through to another area (using a DEM) and the path it takes. It doesn't need to be precisely quantified, just an idea on preferred pathways and the end result. Thanks Matt
_______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
