[GRASSLIST:877] Flow Accumulation

[SWlab]

Hello,

I tried several of the commands to compute flow accumulations (r.flow, 
r.watershed,r.terraflow). It seems that in all cases, the algorithms are 
either D8 (steepest slope), or D-multi (flow weighted among the dowsnlope 
neighbors).
I wondered whether there was any GRASS implementation of the D-infinty 
algorithm (flow routed to a cardinal and a diagonal cells, depending on the 
aspect. Ref: Tarboton, D. G., (1997), "A New Method for the Determination of 
Flow Directions and Contributing Areas in Grid Digital Elevation Models," 
Water Resources Research, 33(2): 309-319). 
If not, I'd welcome any suggestion. [Processing the 'direction' output of 
r.terraflow to find the dominant direction, and linking the aspect map ?]
Thanks a lot in advance
P.
-- 
Soil & Water Laboratory
Dept. of Biological & Environmental Engineering
Cornell University
ITHACA, NY 14853
Tel: 255.2463