I'm regularly trying out different threshold values in r.watershed,
only to get different streams to be vectorized, flow accumulation and
drainage direction are not affected by the threshold option in
r.watershed. I have an idea for a new module that would take flow
accumulation and theshold as input and would then extract streams from
it, both as raster and as vector (topologically clean in the
v.strahler sense). This new module would work with both SFD and MFD
flow accumulation and with r.terraflow flow accumulation. The problem
is that the rough concept exists in my head only and I have no time
right now to develop this module. All the code is there in
r.watershed, it just needs to be reorganized a bit...
Markus M
Markus!
I just started to program these modules. My aim is create module which
will copy funcionality of TAUDEM ie, possibilites to model networks
with sca alone (Mark's method) sca and slope (Montgomery Method) sca and
curvatures (Tarboton's method) custom points and my method which use
hipass filter output and sca to determine swales.
I need only help in some C structures (I rather php programer than C) If
you or someone else will help me in that area it would be appreciated.
So nevermind, It will be part of my proffesor-assistant (habilitation?)
thesis and whether or not module will be finish at the end of september.
Unfortuntely it will not be based on r.watershed. Its code is a little
bit too chaotic and porly commented. For now I publish for testing
first part of my work for strhaler and shreeve analysis.
http://heretic.livenet.pl/heretic/r.stream.tar.gz
regards
Jarek
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