Problem focus: How do duneādike (DD) interactions control wave overtopping under extreme conditions?
Core questions:
- Q1: How do relative position (foredune offset), crest levels, and dune geometry modify overtopping discharge compared with standalone dikes/dunes?
- Q2: What non-dimensional parameters controls the DD-hybrid performance (e.g, slope tanš½, roughness, permeability factors, relative set-back)?
- Q3: Can we derive a practical empirical formula for design/assessment, with quantified uncertainty, that reduces to EurOtop-style predictors for the cases?