watersheds

Codes from "A universal approach for drainage basins".

1. Fixed boundary conditions (FBC)

1.1 Fractional Brownian Motion (fBm) code

fbm2d.sh - Compile and run the FORTRAN code. If necessary, edit the input parameters.
fbm2d.f90 - FORTRAN code for fBm landscape.

How should you run the code?

./fbm2d.sh

1.2 Input file layout

lx ly
i j h_ij
.
.
.

(See fbm2d_l0032_h0.7_s1231.dat)

1.3 Invasion Percolation Based Algorithm (IPBA)

watershed_FBC.sh - Compile and run the codes. If necessary, edit the input parameters.
watershed_FBC.c - C code for IPBA with FBC.
plot.py - Python code for ploting.

How should you run the code?

./watershed_FBC.sh

2. Periodic boundary conditions (PBC)

2.1 Input file layout

lx ly lon lat delta R
i j h_ij
.
.
.

(See GEBCO_2014_2D_90N_90S_f8.dat)

2.2 Invasion Percolation Based Algorithm (IPBA)

watershed_PBC.sh - Compile and run the codes. If necessary, edit the input parameters.
watershed_PBC.c - C code for IPBA with PBC.
plot.py - Python code for ploting.

How should you run the code?

./watershed_PBC.sh

3. Watershed lines

The watershed lines are easily obtained from the "sigma_*.dat" files.