SDR InVEST model coupled with hec ras

I performed Invest SDR model on a watershed of approximately 6000km2, but as described in the user guide, SDR makes the assumption that once sediment reaches the stream we consider that it reaches the outlet which is not correct in the reality… I wonder to know if you can suggest me any other model to couple it with SDR model?
I thought about to use HEC RAS sediment …
thank you