SWRRB Hydrolological Model & GRASS & ARC/INFO

[Sudhakar Mamillapalli]

> 
> 
> 
> Dear All,
>    I am doing some research on integrating hydrological models
> into raster based GIS. I was wandering whether any GRASS users have 
> had  experiences with using the SWRRB model (Simulator for Water
> Resources in Rural Basins) and whether any body knows of a source 
> from which this model and its supporting documentation may be 
> acquired. 
>  
>    Since I last wrote to this list I have programmed TOPMODEL and 
> AGNPS into the cell based modelling language (map algebra) of 
> ARC/INFO. I may do the same with GRASS using r.mapcalc and shell 
> scripts in order to provide a basis for comparison. However, I think 
> that ARC/INFO is easier to use.  
> 
>    I am actually trying to find out whether standard general purpose 
> GIS are any good for hydrologically oriented modelling and if so, 
> how best they may be applied. My ARC/INFO AGNPS and TOPMODEL
> emulate the FORTRAN versions of these models quite well, but are very 
> slow to execute because their simulation algorithms are in command macros and 
> not complied.  
> 
>    The ARC/INFO TOPMODEL predicts spatially distributed 
> saturation excess overland flow and lumped base flow, I am also 
> working on an infiltration excess overland flow algorithm. I have 
> developed spatially distributed hill slope runoff hydrographs to 
> predict flow entering river channel segments and incorporated a 
> constant velocity kinematic wave channel routing method. The ARC/INFO 
> AGNPS just does more or less what the FORTRAN version does.
> 
>    I would like to have ago at implementing the SWRRB model next and 
> also the ANSWERS model as well. If any body would like to  comment on 
> what I have been up to, or have any similar experiences they may wish 
> to share with me  please let me know. 
> 
> Cheers,
> 
> Chris Stocks
> 
> p.s.  If you know anything about the SWRRB model please pass the 
> information on, I also apologise to those GRASS users who don't like 
> hydrological modelling / ARC/INFO messages cluttering up their e_mail 
> list. 
> 

I think SWAT which is more advanced version of SWRRB has already been
integrated with GRASS. I am working with the interface right now. 
you may like to contact srin at brcsun0.tamu.edu regarding this. He may
be able to provide you more information.
Hope This helps

Sudhakar
sudhakar at ecn.purdue.edu