Patrick Hesp March 28, 2024 Coastal dunes are retreating as sea levels rise ‑ our research reveals the accelerating rate of change Patrick Hesp, Flinders University and Marcio D. DaSilva, Flinders University Some Aussie beaches are being reshaped and coastal dunes are marching inland. We used data from aerial photography, field surveys, laser mapping and drones to study incredible rates of change.