How is sediment transport analyzed in rivers?

Sediment transport modes: suspended load (fine particles carried by turbulence), bed load (coarse particles rolling/sliding along bed), and wash load (very fine, supply limited). Analysis methods: (1) Bed load - empirical equations (Meyer-Peter-Muller, Einstein, Parker), (2) Suspended load - integration of concentration profile with velocity profile, (3) Total load - Ackers-White, Engelund-Hansen, Yang equations. Modeling requires sediment size distribution, flow hydraulics, and transport capacity. Mobile bed models (HEC-RAS sediment, MIKE 21C) simulate morphological changes over time.