Aspherix® and CFDEM®coupling allow for the high-fidelity simulation of large-scale sediment erosion and scour formation around critical infrastructure. By utilizing an integrated Volume-of-Fluid (VoF) solver paired with advanced drag correlations, the software accurately captures the complex coupling between turbulent two-phase river flows and millions of multi-sized discrete sediment parcels. This high-performance digital twin environment allows engineers to safely model real-scale hydrodynamics and collective particle behaviors under varying seasonal flow conditions. Ultimately, this predictive workflow delivers actionable insights into structural risk, enabling asset managers to optimize preventative maintenance and guarantee long-term operational reliability.