[Qgis-user] Hydrology

[Lene Fischer]

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
lfi at ign.ku.dk<mailto:lfi at ign.ku.dk>


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Fra: qgis-user-bounces at lists.osgeo.org [mailto:qgis-user-bounces at lists.osgeo.org] 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

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