CMS outputs the actual sediment transport rate in both the x and y directions. If you would like to obtain an estimate of the potential sediment transport, you can calculate this with the the sediment concentration capacity, water depth and current velocity and using the Data Calculator in SMS as Qxstar = U*h*Ctstar, and Qystar = V*h*Ctstar where Qxstar and Qystar are the potentiual sediment transport rates in the x and y directions, U and V are the depth-averaged current velocities in x and y, h is the total water depth, and Ctstar is the total load, depth-averaged sediment concentration capacity. Note that in CMS, Ctstar is in kg/m^3 so the resulting transport units from the equations above will be kg/m/s and can be converted to m^2/s by dividing by the sediment density. I hope this helps. I also recommend you visit the CMS wiki at http://cirp.usace.army.mil/wiki/CMS. Alex