We would like to get the names and addresses of people who
are using GRASS and DEM data to generate a stream drainage
network and the derivative quantitative geomorphic
parameters (Horton-Strahler or better). That is, who has used
GRASS to get stream orders, and number, length, slope,
drainage area, etc., per order? We know of this having been
done with ARC-INFO, and we know of Garbrecht's generation
of these data with Fortran, but who has done it with GRASS
only?
I'm currently working on calculation of the cummulative upslope catchment
area draining trough each cell based on a divergent flow algorithm by
T. Graham Freeman: Calculation Catchment Area with Divergent Flow Based
on a Regular Grid, Comp. & Geosc. 17-3 pp 413-422, 1991.
First I want to finish this for GMT grid files, later perhaps for
GRASS. The reason for prioritizing GMT is that it supports floating point
rasterdata.
Could you please summarize the responses to this subject on the list
Raymond