New Non-invasive Flood Control invention
Principle
Bedload sediment moves along the bottom of the water body by rolling, sliding, or bouncing.
Bedload sediment consists of larger particles such as gravel, pebbles, and larger sand grains that are transported along the bed of a river or stream.
The RSA Bedload Sediment Harvester is a non-invasive sediment capture and removal device reducing downstream build up of bedload sediment.
The device uses the natural river flow propelling the bedload into the device where it is collected and mechanically removed from the riverbed.
The RSA Bedload Sand Sediment Harvester does not dredge the riverbed
The bedload can be sold
RSA Protective Technologies LLC developed the Sediment Harvester System (SHS) to naturally remove bedload sediment from rivers and bayous without dredging.
The material may be used to create or restore habitats, use for landfill cover or sold for profit to the wholesale market. The RSA Sediment Harvester system is designed to remove, collect and distribute bedload sediment from canals and rivers to local or off-site locations.
The system can be removed and reconfigured by truck or relocated by floating as a barge to new locations as sediment flows change over time. The system is self-powered by a propane generator and solar panels without need for shore utilities.
Description:
The RSA SHS consists of a collection assembly which allows water and marine life to flow through the unit, but also allow the bedload sediment to fall through a grate into a collection screw conveyor. A lift conveyor then feeds a discharge conveyer to either a shore location or to a barge anchored adjacent. Additional units may be mounted in parallel for greater collection volume.
The RSA Sediment Harvester system consists of a series of large floating collection assemblies which have collection troughs which are lowered to the canal bottom. The SHS floats on pontoons and can be easily positioned in a river or lake. Four spuds are lowered into the river floor to hold the unit in place against the current. The pontoons are vented to allow water to fill them and the unit then sinks to the bottom.
The collection inlet is then resting on the river bottom and is open to receiving bedload as it moved downstream. System is self-powered and controlled.
A Programmable Logic Controller (PLC) will monitor the motor Variable Frequency Drives (VFD) and additional sensors will monitor the discharge quality. The PLC will then command the VFDs to run faster or slower for the most economical collection rate. The system may also be manually controlled at the site or may be remotely controlled via various wireless technologies.
All structure that is submerged is fabricated of fiber reinforced plastic (FRP) and stainless steel for corrosion resistance and long service life .
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