Pond dredging project

Located in the Beihai Coastal Industrial Zone of Guangxi, this project addresses the severe issues of pond collapse, silt accumulation, and water quality deterioration caused by long-term aquaculture and surface runoff deposition.

To restore the pond's ecological function, enhance its water storage capacity, and ensure a 15-year lifespan for the cofferdam, the project employed geotextile bag dredging technology. The dredged silt was pumped into high-strength geotextile bags for dewatering and volume reduction. These dewatered bags were then stacked to form the cofferdam structure, increasing the strength of the pond enclosure. This approach combines pond ecological restoration with land reuse.

This project employs a comprehensive treatment process combining mechanical dredging and geotextile bag dewatering.

• Dredging: Excavators are used to remove silt from the bottom of the pond and transport it to a storage area; then, mud pumps are used to pump the silt into geotextile pipes, increasing the pond's capacity.
• Geotextile Bag Dewatering: Geotextile bags made of durable, high-strength woven fabric are selected. The fabric's micropores facilitate drainage, and flocculants are added to accelerate mud-water separation and solidification, improving construction efficiency.
• Cofferdam Formation: After the dewatered geotextile bags have stabilized, they are stacked and laid out to form a cofferdam structure, increasing the service life and strength of the pond enclosure.

• Successful dredging and treatment of pond silt increased the pond's capacity by over 2,000 cubic meters;
• Efficient dewatering reduced silt volume by over 90%, improving project efficiency by 60%;
• Stable dikes were formed, extending the lifespan and strength of pond enclosures and enhancing the pond's water storage and flood control capabilities;
• Pond water quality was significantly improved, enabling faster restoration of the aquatic ecosystem and aquaculture environment;
• The project achieved the ecological and environmental goals of dredging reduction and land resource utilization.

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