Water management in Zeeland (NL)
In the battle against water, geotextiles from TenCate were applied within the context of the Delta Works. TenCate technology is again being employed in the restoration of the Veerse Creek and Moats in Veere (Walcheren, Zeeland). Lightly polluted port sludge is being cleaned and stored in TenCate Geotube® containers, which will then be used to construct a protective dam.
Sixty years after this flood disaster TenCate technology is again being employed in Veere, this time for the restoration of the Veerse Creek and Moats. The work involves the improvement of the water quality and the stability of the banks, as well as the restoration of the cultural-historical character of the area. This project is an undertaking of the Scheldestromen Water Authority in cooperation with the province of Zeeland, the municipality of Veere and the Dutch Forestry Commission.
A series of TenCate Geotube® containers are being used to clean and store lightly polluted port sludge around the port of Veere. The geotextile acts as a filter (separating water and sediment) and as a support cloth (keeping the sludge together). In this case the geotextile containers have a new, third function: in addition to the cleaning and storage of sludge, they will be used to construct a protective dam.
In total more than 78,000 m3 of dredged sludge will be removed from the silted sea arms of the Veerse Creek. The containers filled with the sludge will be stacked to form a firm stable bank. Then these units will be placed under water to serve as a weir. This erosion-resistant zone will acquire a natural appearance thanks to the installation of a reed strip. The project provides for 1800 metres of timbering along the banks of the Veerse Moat in order to restore the taut lines and original form of the defence works, as well as some 1600 metres of nature-friendly banks. A total of 1300 metres of TenCate Geotube® are required for the project.
TenCate Geotube® technology is not only durable in terms of time, but also ecologically very attractive. Use will be made of the sand or sludge available on site to fill the TenCate Geotube® containers, so this solution has a modest CO2 footprint. There is no need to transport the sludge off site with heavy vehicles or bring in building materials for the dike. It is also a ‘time-friendly’ project: one geotextile container can be filled in approximately 6 hours.