this is the control input file for the sand trap case, for computing the 
sediment concentrations.

T sandfangmodell - 1992-4-29                      title field
F 1 D
F 2 URSM              run-choise. yh = make unstructure file from koosurf, m=print
F 33 10 10
F 37 2 
f 48 2 interres velocities
F 48 6 interres concentrations
F 87 0.01 
F 65 1000000 1000000 1000000 10 10 
F 68 2 hydrostatic 
F 237 1 0.225 discharge in
F 237 2 0.225 discharge out
F 314 1 1 generate inflow/outflow discharge groups
G 1 300 30 21 4    number of nodes in x,y and z direction+sed.size
i 1 0.238         inflowing sediments in kg/s
i 2 100.0       inflowing sediments in kg/s
i 3 100.0       inlowing sediments in kg/s
i 4 100.0       inflowing sediments in kg/s
S 1 0.00045  0.07                  sediment fraction nr, size, fallvelo,
S 2 0.00030 0.04
S 3 0.00020 0.025
S 4 0.00010 0.008
N 0 1 1.0                 sediment sample
n 0 3 0.3                 sediment sample
n 0 4 0.5                 sediment sample
B 0 0 0 0 0                       bed koordinates, composed of sediment
                     fraction, part of bed covered with this
W 1 80 0.225 1.54      mannings m, discharge and downst. w. lev.
W 2 20 1 5 8 11 15 20 25 30 40 45 50 55 56 60 63 65 68 70 73 74         initialization
cross-section numbers
K 1 30 7000                             number of iterations for flow procedure
K 2 0 1                  coeff. for influence of surface/banks
K 3 0.8 0.8 0.8 0.05 0.5 0.5      relaxation coefficients
K 4 1 1 1 5 1 1                number of sweeps for each equation
K 5 1 1 1 1 1 1                 block-correction for each equation,1=yes