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|Title:||Preliminary feasibility study : transport and distribution of dredged materials by hovercraft for wetland nourishment and restoration|
|Authors:||Wetlands Research Program (U.S.)|
Olin-Estes, Trudy J.
Palermo, Michael R.
Gibson, Anthony C.
Dredged material transport
Reclamation and nourishment
|Publisher:||Environmental Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: Loss of coastal wetlands because of subsidence and anthropogenic activity has prompted interest in the use of dredged material to reclaim and maintain these areas. The adaptation of hovercraft for the transport and distribution of dredged material in coastal wetland areas has been proposed as an environmentally sensitive alternative to conventional transport methods. A preliminary analysis was conducted regarding the economic and technical feasibility of hoverbarge transport of dredged material. The results of this analysis indicate that hovercraft (hoverbarge) transport of dredged material may be technically feasible. Limited load capacity, however, and high operating and maintenance costs result in logistical problems and high unit transport costs in comparison with other transport methods. The production rate of a typical dredging operation exceeds the potential utilization rate of hovercraft. Interim storage and rehandling would therefore be required. The environmental impact of repetitive hovercraft traffic in wetland areas has not been studied in depth. Environmental justification for this higher cost transport alternative would be contingent upon demonstrating fewer adverse impacts than for conventional transport methods after mitigation. Costs of mitigation would also be considered in a full-scale economic analysis. These elements were beyond the scope of this report.
|Appears in Collections:||Technical Report|