About the definition of SAND_TAU_CE and SAND_TAU_CD in USGS sediment model

[Cesar-IIUNAM]

Hi Jhon,

What could be happening in my sediment model, that by changing values for SAND_TAU_CE and SAND_TAU_CD I cannot observe any change in erosion and sedimentation rates within my test domain.
My domain is the northern Yucatan peninsula, a very shallow region, which has a spatial resolution of 500m and (at the moment) is only forced by currents. The bottom of my model consists of ~0.2 mm sand and 0.02 mm fine sediment, and a single 1 m thick sediment layer.
Initially, I defined SAND_TAU_CE = 0.5 and SAND_TAU_CD = 0.4, then I have increased the values to 2.0 and 0.5 respectively to force less erosion and maintain the sedimentation rate, still, nothing seems to change.

The sediment model configuration is:

SAND_SD50 == 0.02d0 0.2d0
SAND_CSED == 100d0 400d0
SAND_SRHO == 2650.0d0 2650.0d0
SAND_WSED == 0.03 20
SAND_ERATE == 5.0d-4 5.0d-4
SAND_POROS == 0.5d0 0.5d0 0.5d0
SAND_MORPH_FAC == 1.0d0 1.0d0
BEDLOAD_COEFF == 1.0d0

Thanks for your attention. I would appreciate any comments.

Regards,
César.