[GRASS-user] TopoFlow and GRASS (or any continuous distributed hydrologic model)

[stephen sefick]

I would like to be able to model groundwater and surface water flow
for some particular watersheds with usgs gauging stations.  The
gauging stations are to help parameterize/validate the modeled
discharge.  I would then like to be able to try and predict
probability of intermittance, or, in other words, where permenant flow
starts in the watersheds under investigation.  I think that D8 flow
algorithm based distributed hydrologic models are the way to do this.
If I am wrong I would greatly appreciate this being pointed out.  I
was wondering if there were any implementations for long-term
simulation (I would like to account for different water years).  Also,
I would like to, at the least, use GRASS as a preprocessor for gridded
rainfall and Evapotranspiration time series (along with whatever else
may be necessary input data).  I have looked into GSSHA, but don't not
have the resources for acquiring the WMS software needed to drive the
model ($1500), and it looks like TopoFlow for the Colorado CSMDS
modelling group would work.  If there are any suggestions, comments,
or criticisms of my decisions for trying to attack this problem please
point them out.  Thank you all very much for your wonderful help.
kindest regards,

Stephen Sefick

On Thu, Apr 22, 2010 at 8:54 AM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Thu, 22 Apr 2010, stephen sefick wrote:
>
>> I would like to simulate the hydrology of a watershed.  Does anyone have
>> guidance for this particular endeavor- especially with the help of GRASS
>> GIS as a raster processor, or engine for model analysis?
>
>  There are several hydrologic modules available for your use. The raster
> manual (r.*) has details on each, and the wiki has a section on hydrological
> modeling.
>
>  The question you need to answer in order to get more focused help here is
> just what it is you want to do. What problem are you trying to solve? What
> behavior(s) do you want to explore? Specificity, and telling us what you've
> done so far to educate yourself, goes a long way to helping you.
>
> Rich
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user
>



-- 
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