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Coastal erosion stopped by using geotextile bags filled with solid sediment

Reuse of dredged material is a win-win situation for erosion

Before and after: beach nourishment using dredged sediment from the deepening of the navigation channel in Poole Harbor(UK)

Dredging and disposal of sediment poses some unique challenges in the ecologically protected Poole Harbor (UK).

This multi-objective project provides a win-win solution: using dredged material beneficially solving a river bank erosion problem helping to restore 7,000m3 of reed-bed, a declining, nationally important habitat. 

 

Dredged material was retained within four geotextile bags filled with solid sediment using a concrete pump, underwater. The bags were planted with locally-sourced reed.

Erosion stops because of the Netics geotubes

Erosion stops because of the Netics geotubes

Rivers and coastal protection

The benefits of erosion control by reed bed reinstatement are a local, beneficial reuse of dredged material. Reed beds both provide effective natural control against river bank erosion and valuable habitat. Riverbank erosion control by reed bed reinstatement might be potential applications in all low lying, sediment-rich areas with dredging requirements and riverbank erosion issues.

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