As a result of complex legislation, lack of space and public resistance, cost effective solutions for dredged material, are becoming more and more difficult to find. Re-use of former borrow pits is an attractive option, particularly when it offers opportunities for environmental enhancement.
Contrary to conventional wisdom, most dredged material is clean, natural product and, far from being a waste, can be an important environmental and economic resource, as shown in two case studies: the rehabilitation of a brownfield at Fasiver, Belgium and the creation of a wetland in Wallasea, UK.
Contrary to conventional wisdom, most dredged material should be regarded as a resource, not a waste, and finding new uses for clean dredged material should be a priority.
In an extensive pilot study, contaminated sediment dredged from an industrial channel in Venice has been mechanically treated by dehydration at a purpose-built plant near the harbour.
To encourage the beneficial use of dredged material, a harmonised approach - especially for land disposal - is urgently needed.
In industrial areas, space is at a premium. Rapid dewatering of dredged material is an important way to optimise the use of available storage volume.