TELEMAC-MASCARET Forum: CRITICAL EROSION SHEAR STRESS OF THE MUD (1/1)

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TOPIC: CRITICAL EROSION SHEAR STRESS OF THE MUD

CRITICAL EROSION SHEAR STRESS OF THE MUD 11 years 1 week ago #11007

jlw OFFLINE Fresh Boarder Posts: 8	Hi; I am dealing with the cohsive sediment. Due to spatial variation of the sediment grain size,it is reasonable to give different critical erosion shear stresses in different regions based on the grain sizes,would someone please to tell me how to define the critical erosion shear stresses in different regions? many thanks in advance! Liangwen
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CRITICAL EROSION SHEAR STRESS OF THE MUD 11 years 1 week ago #11018

cath
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Hi,

The way the model works is that the critical erosion stresses are constant per mud layer and specified by keywords.
Bed layer thicknesses may vary in depth and also horizontally depending on the consolidation state of the mud. The initial layer thicknesses are set in subroutine init_compo_coh.f.

In the default file, layer thickesses are uniform, but in order to specify some more rigid bed in some areas, the easiest way would be to empty the top layers in those areas. You could program this in init_compo_coh.f

In the 3D model we are programming a spatially varying bed shear strength which can be read from the geometry file. This will be for the next release 7.0 and could easily be programed in Sisyphe.

Best luck, Cath

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The following user(s) said Thank You: jlw