This site is located on private property, adjacent to a river section designated by local council as a wave generation zone (i.e. for use by wake boarders and skiers). 8m of riverbank and most riparian vegetation was lost over 10 years. Rock fillets installed were mostly successful, with natural backfill of mangroves (average 1m height, 10 plants/m2). Some rocks slumped and/or became more porous, thereby letting water wash sediment away and leaving low points permanently holding water restricting mangrove growth. Sediment height above mean low tide was demonstrated to be an important factor impacting recruitment. Areas with sandier sediment also experienced low to no mangrove growth. Despite these challenges, the project was overall a success.

Mangroves

Method: Hybrid, Supplementary revegetation

Mangrove species: Avicennia marina

Hybrid structure: Rock fillet

Hybrid structure height (m): 1.5m

Hybrid structure width (m): 2.5m

Hybrid structure length (m): 20m