Dredging Work at Wujia Port, Taiwan

Wujia port in central Taiwan has been experiencing sediment problems for many years. When low to moderate tides occur, fishing rafts unable to go out to sea. This is as a result of upstream sediments of the Wenliao River and littoral drift from northeastern monsoon and tidal currents. The situation has worsened over time and has seriously affected the fishermen.

Harbor siltation severely affected the fishermen's livelihood as well as curtailing the local fishing industry. To minimize this impact, the government allocated considerable funds for improvement plans which includes dredging, breakwater building, waterways dredging, harbor maintenance, etc. to limit the effects.

To avoid frequent dredging and littoral drift problem, ACETube® dewatering system is used for dredging work. It allows liquid-solids separation while also containing the sediment. ACETube® tubes are made of high permeable geotextile fabrics with optimal aperture opening which has excellent filtration characteristic to achieve higher dredging efficiency. In this case, the tube is fabricated by ACETex® PP 70/105, which circumference is 8.6 m and length is 50 m. The tubes are placed along the coastline. After pumping the in-situ sedimentation into the tubes, they form a barrier structure to stop littoral drift flowing in the harbor. This solution makes it easy to both clean the harbor siltation but also reuses the sediments as well.

The siltation problem has been successfully improved by introducing ACETube®. Apart from the reinvigorating the sluggish fishing economy, ACETube® system is an environment-friendly and economical solution without the need to transport materials to build the breakwaters and/or create waterways.