r.watershd & topo index

Dan Riker riker at hydro1.geo.duke.edu
Thu Apr 1 11:42:11 EST 1993

I have a quick question about the accumulation map for finding the topographic index ln(a/tanB)
For my accumulation map, I find many lage negative values, and I always get a message that overflow occurred in the watershed.  Is this okay, or can the problem be readily solved. 
Any help would really make my day.  
Dan Riker
Duke University

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