Containment dykes wetlands development using geotextile

Wetlands development using geotextile tube containment dykes... 

Offshore wetlands developments are usually located in sheltered marine locations and serve as habitats for local and migrating birds. Fig. 20.29(a) shows a cross section of a typical offshore wetlands development area in which dredged spoil has been used as the hydraulic fill to construct the wetlands habitat. The wetlands development is contained within geotextile tube containment dykes which also can be filled with the dredged spoil material, which thus makes full use of the dredged spoil. If the... 

Fig. 20.29(b) shows the constmction of an offshore wetlands habitat area using spoil excavated from a nearby mnnel construction. The spoil, which consisted of fine, uniform sand, was also used to fill the geotextile tube containment dyke surrounding the wetlands development area. For permanent protection, a rock armour layer was placed over the outer surface of the geotextile mbe containment dyke. 

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