An Environmental Impact Assessment (EIA) for the proposed dredging and recovery of marine phosphate sands from the Don Diego deposit was required. Key issues for the EIA
- included the potential for sediments released from the extraction processes, to disperse widely and settle on areas of biodiversity interest.
- concern over the potential for underwater sound to affect marine mammals in the region.
HR Wallingford carried out independent scientific studies of marine sediment plume dispersion and the propagation of underwater sound from the extraction processes. We applied our state-of-the-art computer models of marine sediment behaviour (SEDTRAIL-3D) and underwater sound propagation (HAMMER).