ANSWERS on GRASS

[Bernard A Engel]

u}?from??sayeed%weirich320?geography?uiowa?edu??at?Mar?7??95?12?35?41?pm at bnr.ca
>
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> 
> 
> 
> I have been using the ANSWERS on GRASS for a drainage basin, for which I
> have data with various levels of resolution.  When I tried to run the
> model with a 8m X 8m grid cell size, the program stops execution after
> printing rainfall, soil, cover, and channel data in the answers_ouput 
> file.  The output file ends with the following error message: 
> 
>  NO. OF ELEMENTS EXCEEDS DIMENSION AT ELEMENT  55,  56  
> 

I've modified the version of ANSWERS I'm running to accomodate
more cells.  It's fairly easy to modify the ANSWERS Fortran
code and recompile it -even if you're not very familiar
with Fortran.  The r.answers interface will not
be affected.

I would not recommend using an 8m by 8m grid size
for this model.  Some of the model assumptions
become VERY questionable when you get to such a
small grid cell size.  Grid cell sizes in the
50m to 200m range are more appropriate.

You can reach David Beasley at beasley at bae.ncsu.edu


Bernie