An in-situ purification island structure and the construction method thereof, which refers to the field of sewage treatment technology. The in-situ purification island structure comprises the upstream purification island main body and the downstream purification island main body, in which the upstream purification island main body comprises the first base backfill layer, the first lower layer, the first hydrophobic layer, the first water permeable layer and the first upper layer. The first ecological bags are set around the surface of the first base backfill layer. The first lower layer has center formed with a lower layer backfill transitional zone. The first hydrophobic layer has center formed with a hydrophobic layer backfill transitional zone. It has a good natural purifying effect on the sewage, saves the investment and cost, no limitation on the applications, the capacity and efficiency of the purifying is high, and saves the resource.

A device comprising a corkscrew; a substantially flexible shaft operably attached to the corkscrew at a first end of the shaft; and one or more protrusions extending from the shaft between the first end of the shaft and a second end of the shaft. Methods of using the device are also disclosed.

A transportable wave suppressor and sediment collection system for suppressing wave action along the shore of a body of water, which includes a plurality of interconnected sections, each section including a base, a forward wall, and a rear wall, and having a plurality of flow pipes extending from the forward wall to the rear wall, and further including a plurality of shelves on the forward wall for dispersing wave energy, while redirecting and using the wave energy to allow water and sediment to flow into the flow pipes and for collecting sediment that is not carried into the flow pipes and settles on the shelves for being contacted by a following wave to carry the sediment into the flow pipes. In some deeper water embodiments, the sections may include a base portion, a top portion and one or more spacer portions to enable raising or changing the height of the system.

The disclosure relates to the technical field of polluted sediment remediation, and particularly relates to a biochar-enhanced grass blanket for remediating contaminated sediment and a preparation method thereof, and a method for remediating contaminated sediment. In the disclosure, the grass blanket for remediating contaminated sediment prepared by the method can not only efficiently absorb pollutants released from the contaminated sediment but also facilitate the entry of the root system of submerged plants into the contaminated sediment simultaneously, thereby improving the survival rate of the submerged plant and effectively ameliorating the matrix of the contaminated sediment.

An apparatus, system and method for removing and treating contaminated materials on a bottom of a body of water and introducing growth packets to revitalize the treated bottom of the body of water. The structure may comprise a vessel with an open face. The vessel may be lowered down to the bottom of the body of water with the face facing down. As a result, the vessel and the bottom form an isolated space. The structure may comprise at least one agitating device(s) for stirring up the materials inside the vessel so as to form a mixture containing the sediment materials which in turn contain the contaminants. Multiple at least one pipe(s) may be coupled to the vessel for transporting the mixture out of the vessel for processing (filtering, treating with chemicals, etc.) so as to neutralize or eliminate the contaminants in the mixture. Then, the treated mixture can be returned to the inside of the vessel via the at least one pipe(s).

A transportable wave suppressor and sediment collection system for suppressing wave action along the shore of a body of water, which includes a plurality of interconnected sections, each section including a base, a forward wall, and a rear wall, and having a plurality of flow pipes extending from the forward wall to the rear wall, and further including a plurality of shelves on the forward wall for dispersing wave energy, while redirecting and using the wave energy to allow water and sediment to flow into the flow pipes and for collecting sediment that is not carried into the flow pipes and settles on the shelves for being contacted by a following wave to carry the sediment into the flow pipes. In some deeper water embodiments, the sections may include a base portion, a top portion and one or more spacer portions to enable raising or changing the height of the system.

There is provided a material transfer system comprising a first reciprocating conveyor which selectively moves material towards a first location, and a second reciprocating conveyor which overlaps with the first reciprocating conveyor, with the second reciprocating conveyor selectively moving material from the first location towards a second location. There is also provided a material transfer system according to another aspect comprising a conduit in fluid communication with an upstream portion of the body of water, and a reciprocating conveyor configured to convey upstream said material in the body of water towards the conduit. There is further provided a reciprocating conveyor configured to promote movement of the material in a first direction and inhibit movement of the material in a second direction, and a conveyor position adjustment assembly configured to selectively move a first end portion of the conveyor relative to a second end portion of the conveyor.

A self-acting dredging and drainage structure for a plain river network irrigation area is provided. The structure includes a first tube body, a water inlet end side of the first tube body is provided with a trash rack, a partition body is provided in the first tube body, and a water outlet end side of the first tube body is provided with a contraction and diversion device. The contraction and diversion device divides a water outlet end of the first tube body into an upper water outlet side and a lower water outlet side, and the contraction and diversion device includes no less than one arranged contraction and diversion pipe; and the upper water outlet side has first water outlets and second water outlets.

This invention relates to hydraulic engineering construction and can be used for deposit cleanup of river beds and channels. The object of the invention is to expand the arsenal of usable means for deposit cleanup and deepening of river beds, develop a method and create a device that uses the speed of the river current in the most effective way. The technical result of the claimed method is simplification and optimization of one existing method for cleanup of river beds and channels, increasing its functionality. The proposed method implements a movable water flow-restricting device with flow-guiding elements that creates a concentrated stream and directs it to a washout zone, bound by side walls, roof and washout surface.

A method of remediating contaminated sediment area. The sediment has an initial water depth and comprises water and fine-grained solids. The contaminated sediment is contained in place by installing over the contaminated sediment an in-situ cap having a total thickness TCP. The contaminated sediment, and optionally any uncontaminated subsurface, is then consolidated until the total settlement of the contaminated and uncontaminated sediment exceeds the thickness TCP of the in-situ cap. The sediment is consolidated by installing a vertical barrier along the perimeter of the contaminated sediment area, installing a plurality of horizontal line drains into the sediment, connecting the horizontal line drains to a vacuum source, installing an in-situ cap over the contaminated sediment area and over the upper edge of the vertical barrier, and applying vacuum pressure to the horizontal line drains to dewater and consolidate the sediment.