[GRASS-user] Geomorphic index for valley, using "height of the valley / width of the top of the valley"

[Stefan Blumentrath]

Hi Valter,

please have a look at:
https://grass.osgeo.org/grass78/manuals/addons/r.stream.distance.html
r.stream.distance - GRASS GIS manual<https://grass.osgeo.org/grass78/manuals/addons/r.stream.distance.html>
NAME r.stream.distance - Calculates distance to and elevation above streams and outlet. The module can work in stream mode where target are streams and outlets mode where targets are outlets. KEYWORDS raster, hydrology, stream network, watercourse distance SYNOPSIS
grass.osgeo.org

However, it is an addon. So it is - unfortunately - not necessarily straight forward to integrate it into your workflows (I understood you use GRASS from QGIS). At least in the processing framework you would need a workaround.

Hope that helps a bit never the less.

Cheers
Stefan
________________________________
Fra: grass-user <grass-user-bounces at lists.osgeo.org> på vegne av Valter Albino <valteralbino at gmail.com>
Sendt: lørdag 11. april 2020 23:18
Til: grass-user <grass-user at lists.osgeo.org>
Emne: [GRASS-user] Geomorphic index for valley, using "height of the valley / width of the top of the valley"

Hi all
I would like to calculate a geomorphic index for valley, using the following equation: height of the valley / width of the top of the valley - the higher the index values, the greater the notch (carve in the landscape) in the valley.
I found that SAGA gives the "Vertical distance to the channel network".
Does GRASS have a function to calculate each ot the two input?
Thanks in advance

Cumprimentos,
Valter Albino - Geógrafo Físico, M.Sc.
Modelação H&H / Riscos ambientais / OT&U
www.valteralbino.wixsite.com/hydrodynamics<http://www.valteralbino.wixsite.com/hydrodynamics>
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