Long-Term Effects of Maintenance Dredging on Turbidity
Long-Term Effects of Maintenance Dredging on Turbidity

Maintenance dredging is required in many estuaries worldwide to provide access to ports and inland waterways. A newly developed dredging module is able to capture the two fundamental processes necessary to model the long-term impacts of dredging on turbidity.

Turbidity
Turbidity

Turbidity is a leading factor in causing underwater disturbances to marine life and must be minimised and monitored during a dredging project.

Dredging in New Caledonia at a Unesco-IUCN World Heritage Site with Care for Nature
Dredging in New Caledonia at a Unesco-IUCN World Heritage Site with Care for Nature

Dredging for a new port complex in a remarkable, protected marine environment required adherence to very specific thresholds and an intensive Environmental Management Plan (EMP) that included mobile monitoring as well as daily visual observations of turbidity levels around the dredging works and the disposal zone.

TechNotes: Alternative Particulate Control Option for Sediment Removal
TechNotes: Alternative Particulate Control Option for Sediment Removal

An innovative environmental clamshell bucket and mobile dredge cell can generate less turbidity than a traditional silt curtain.

Turbidity Caused by Dredging; Viewed in Perspective
Turbidity Caused by Dredging; Viewed in Perspective

The environmental impact of turbidity depends upon the dredging technique used; the ease with which the sea bed material becomes resuspended; and the condition of the surface water. An on-site analysis is advisable.