Please read Nelson et al. (2003)'s Chapter 18 in Tools in Fluvial Geomorphology. This chapter presents the theory and development of the FASTMECH model you have been using in MDSWMS/IRIC. Come prepared on Tuesday to discuss the chapter and attempt to relate it to the modeling you've been doing in lab.

Nelson JM, Bennett JP and Wiele SM. 2003. Flow and sediment transport modeling. Kondolph M and Piegay H (Eds), Tools in Fluvial Geomorphology. John Wiley & Sons, Ltd: Chichester, pp. 539-576.