Subdivides the sites of a basin in 11 topographic classes, nine of which are defined according to the program TC.

Such classes are the nine classes based obtained with [Tc] ; the points belonging to the channel networks constitute a tenth class (derived from the use of ExtractNetwork), the points with high slope (higher than a critical angle) the eleventh class.



Inputs

  1. The !GridCoverage containing the slopes, obtained with [Slope] or [Gradient];
  2. The !GridCoverage containing the channel network, obtained with [ExtractNetwork];
  3. The !GridCoverage containing the subdivisions in curvature classes, obtained with [Tc];


Outputs

  1. The !GridCoverage containing the subdivision in the 11 predefined classes;
  2. The !GridCoverage of the aggregated classes (hillslope, valleys and net);


Notes

Differently from the program TC, the program GC considers also the existence of the channel net, which is extracted from the DEM. The channel net is thought as a topologically connected network, even though it is known that this cannot be the real case.

The cases are identified as in TC plus:

The second output file contains an aggregation of these classes in the four fundamentals, indexed as follows:

  1. 15 → non-channeled valley sites (classi 70, 90, 30 )
  2. 25 → planar sites (classi 10)
  3. 35 → channel sites (classe 100)
  4. 45 → hillslope sites (classi 20, 40, 50, 60, 80)



References