note: this case is only meant for demonstration purposes. 
the grid is too coarse to give the correct bed changes

T demo of scour    title field
F 2 IS            run choice
F 4 0.8 5 0.0001
F 7 B                   run options
F 16 0.01                  roughness in meters
F 33 1000.0 2               time step
F 36 2                        tfs routine
F 37 1                        tsc routine
F 42 -8                       min level scour
F 43 1                        underflow
F 53 500 100 500 100 print-out
F 54 0.01 time break limit
F 56 2 0.84   avalanche parameters
F 59 2  speed-up of gauss-seidel solver
G 1 31 11 7 1                grid and array sizes
G 3 0.0 10 20 30 50 70 100.0  vertical grid distribution
G 6 31 6 8 0.2 0.1          free surface
G 7 0 1 2 11 2 7 0 0 3.0 1.0 0.0 0.0 inflow 
G 7 1 -1 2 11 2 7 0 0 3.0 1.0 0.0 0.0 outflow 
G 13 1 5 6 6 7 2 7        outblocking - definition of obstacle
S 1 0.008 0.5                  sediment size and fall velocity
I 1 0.0 kg/s                    inflowing sediment
N 0 1 1.0                       grain size distribution in bed
B 0 0 0 0 0 0 0               where n is placed
W 1 50.0 3.0 1.0
W 2 3 1 15 31
K 1 10000 600000
K 2 0 1