Hello,
i need pleas an explanation for the steering_file from Sisyphe.
my model has a trapezoid profile. The embankments are made of cement, only the sole in the main channel is mobable. ( Attachment)
I have already define the RIGIG BED 'SUBROUTINE NOEROD' as Fortan file in Steering_file Telemac. ( Attachment)
the sohl material is defined as multigrain
/
/ MULTIGRAIN
/
NUMBER OF SIZE-CLASSES OF BED MATERIAL = 3
SEDIMENT DIAMETERS = 0.00544D0; 0.00317D0; 0.0017D0
INITIAL FRACTION FOR PARTICULAR SIZE CLASS = 0.5D0; 0.3D0; 0.2D0 / total = 1
/
/ MULTI LAYER
/
NUMBER OF BED LOADMODEL LAYERS = 3/3 layer
CONSTANT ACTIVE LAYER THICKNESS = YES
ACTIVE LAYER THICKNESS = 0.20
SECONDARY CURRENTS = YES
/
my questions:
1- what says exactly the 'INITIAL FRACTION FOR PARTICULAR SIZE CLASS' .
in my case, is that the same as the D50,D30 and D10 in the grading curve of my sole material?
2- in the Fortran file: the embankments are defined as rigid bed
NON ERODABLE BED equals BED : ZR (J) = IF (J) (see the Fortran file in attachemnt)
in the result of Sisyphe 'MEAN DIAMETER M': a distribution for the bottom material was also shown on the embankments. I don't undestand that!
As an attachment is here a skizz for cross profile of the channel, Fortran file and the Result.
Many thanks in advance
Rima