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IMS Bi-Directional Broadcaster Discharge Attachment – Spray Dredging / Broadcasting

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The IMS Bi-Directional Broadcaster Discharge Attachment can be used for side casting material onto a canal bank, maintaining a port channel and discharging back into the normal water current, or restoring wetland habitats.

Removing the discharge line from the dredge in a canal maintenance scenario and attaching the IMS Bi-Directional Broadcaster gives you the ultimate freedom. There are not anchor cables and no pipeline. You now have a self-propelled Versi-Dredge with no pipe and you can spray your discharge up to 24m (80 ft.) away to the bank. This allows for continuous uninterrupted dredging at peak production levels. The Versi-Dredge outfitted with the Broadcaster in a canal can replace the use of 3-4 excavators. The other benefit is that the material is returned in gradual layers and settles in the grasses and vegetation on shore instead of in large piles that must be moved to a landfill.

By utilizing the IMS Bi-Directional Broadcaster Discharge Attachment on your Versi-Dredge system you will be able to use the Versi-Dredge for beneficial “spray dredging” of nutrients on marshes and wetlands adjacent to the waterway in the dredging area.  Many studies have proven the beneficial use of spray dredging.  The Versi-Dredge can use the Broadcaster with both the SolidsMaster sediment cutterhead and the WeedMaster vegetation cutterhead.

According to a study by the Wetland Biogeochemistry Institute at Louisiana State University: Sediment additions, either by natural or artificial means, represent one of the most promising and long term of the proposed actions to restore and protect wetlands. Organic matter accumulation and sediment addition interact to prevent salt marsh submergence. Spreading dredged material out on the marsh surface is one of the methods that have been proposed for supplying mineral matter to sediment starved marshes. In addition, dredged material is being used in marshes to mitigate for the impacts of canal dredging. Plants in the sediment affected areas showed a positive response to increasing depths of added sediment. Both vegetative and physical parameters responded to sediment additions. Plant height and cover were great with increasing sediment deposition.  Full CONCLUSION of Study: Sediment additions appear to have successfully rehabilitated this deteriorating salt marsh. With sediment additions salt marsh plant growth improved due to increased soil aeration, nutrient and mineral matter content. Areas receiving intermediated and high amounts of sediment showed increased plant cover. Furthermore, the highest SAR’s are likely to be the most long-lived because of the effects of subsidence and sea level rise. Thus, sediment additions could play a positive role in the management of sediment starved marshes, although successful enhancement may be mediated by a number of other considerations.

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