The contributing areas 3d represent the real draining areas afferent to a point in the basin, not only its projection on the plane as the Tca do.
Inputs
- the file containing the matrix of pitless elevations (obtained with pitfiller)
- the file containing the matrix of drainage directions (obtained with Markoutlets or DrainDir)
Output
- the file containing the matrix of the real areas
Notes
The way to calculate the 3D area is to approximate with triangles the DEM surface and then summing the triangles area going downstream from sources to outlet.