[GRASS-user] r.watershed: Problems Using

[stephen sefick]

Stream accumulation map:
Have you set a reasonable threshold?  If your threshold value is to
low then you will have scattered lines.  Say at 10m resolution you set
the accumulation threshold to 1- you will be generating streams that
are derived from a watershed area of 100m.  I don't know if this makes
sense or not.
hth,

Stephen

On Wed, Feb 10, 2010 at 12:50 PM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Wed, 10 Feb 2010, Jarek Jasiewicz wrote:
>
>> Sorry but I cannot understand you. What type of help you expect?
>
>  Hydrological modeling I've done in the past have been strictly numeric,
> not graphic. I've not used GRASS before for modeling basins.
>
>> ... do not nothing what do not other hydrological modeling tools like
>> taudem, saga, TAS, TNT watershed, and others.
>
>  I'll take a look at those.
>
>  I'm used to numeric output, not maps. Interpreting the latter is not
> within my professional experience. That's what I need to learn.
>
> Rich
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-- 
Stephen Sefick

Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods.  We are mammals, and have not exhausted the
annoying little problems of being mammals.

								-K. Mullis