Benthic Scour Risk Assessment Matrix (BSRAM) v3.1 – Site-Specific Template

BSRAM v3.1 operationalizes a semi-quantitative risk framework that maps qualitative and quantitative inputs—such as near-bed current velocity, sediment mobility (e.g., Shields parameter), seabed stratigraphy, foundation geometry, and cable burial depth—to a standardized 5×5 risk matrix (Likelihood × Consequence). Each cell in the matrix corresponds to a defined risk level (Low to Extreme), accompanied by prescriptive guidance on required actions (e.g., 'monitor only', 'design mitigation', or 're-evaluate siting'). The methodology adheres to principles from DNV-RP-F109 (Scour Around Offshore Structures), CIRIA C682 (Scour at Marine Structures), and industry best practices adopted by the UK’s Crown Estate and Ørsted/ScottishPower joint guidance. Crucially, the 'Site-Specific Template' variant enables dynamic input calibration: users populate designated worksheets with bathymetric surveys, ADCP/CTD-derived current profiles, grain-size distributions from grab samples or vibrocores, and foundation/cable as-built geometries—triggering automated conditional logic and color-coded risk outputs. This ensures traceability, auditability, and consistency across multidisciplinary project teams while reducing subjectivity in early-phase geotechnical hazard assessment.