This is the "input - output" talk from a 2D sediment workshop we did in December 2021.
The workshop was funded by the USACE Flood and Coastal R&D program and these videos were funded by the HH&C SET program (The Science and Engineering Technology program of the Hydrology, Hydraulic and Coastal Community of Practice in the USACE).
I am putting the whole class up here as I edit it:
https://www.hec.usace.army.mil/confluence/rasdocs/rastraining/latest/hec-ras-classes/2d-sediment-transport-2021