A gate structure of flow guiding sediment bypass tunnel with self-adaptive inlet adjustment the gate structure comprises a sediment bypass tunnel main body, wherein: the sediment bypass tunnel main body comprises a second revolution wheel, a second braking rim, a top water stopper plate and a weir, a second regulator is provided at a front side of the sediment discharge tunnel, the second revolution wheel is provided at a top portion of the second regulator, a top portion of the second revolution wheel is welded with the second valve lever, the second valve lever is connected with the top portion of the second regulator, and by providing the flow guiding structure at the bottom portion bottom water flows with higher sediment concentrations can be guided into the tunnel; and the altitude of the flow guiding inlet at the bottom portion can be automatically controlled with the gate structure.

A gate structure of flow guiding sediment bypass tunnel with self-adaptive inlet adjustment the gate structure comprises a sediment bypass tunnel main body, wherein: the sediment bypass tunnel main body comprises a second revolution wheel, a second braking rim, a top water stopper plate and a weir, a second regulator is provided at a front side of the sediment discharge tunnel, the second revolution wheel is provided at a top portion of the second regulator, a top portion of the second revolution wheel is welded with the second valve lever, the second valve lever is connected with the top portion of the second regulator, and by providing the flow guiding structure at the bottom portion bottom water flows with higher sediment concentrations can be guided into the tunnel; and the altitude of the flow guiding inlet at the bottom portion can be automatically controlled with the gate structure.

A system for selectively closing a fluid flow channel may include a gate apparatus with a gate structure and a guide frame assembly guiding movement of the gate structure between closed and open positions. The guide frame assembly may define a passage opening and include a gate threshold with a threshold plate having an opening perimeter forming the passage opening. The opening perimeter may be formed by an edge of the threshold plate, and the opening perimeter may have a lower perimeter portion. The gate structure may have a gate plate with a perimeter edge including a lower edge portion. The lower edge portion of the gate plate may bypass the lower perimeter portion of the threshold plate when the gate structure moves toward the closed position to form a first shear point to shear any plant material extending through the passage opening.

A system for selectively closing a fluid flow channel may include a gate apparatus with a gate structure and a guide frame assembly guiding movement of the gate structure between closed and open positions. The guide frame assembly may define a passage opening and include a gate threshold with a threshold plate having an opening perimeter forming the passage opening. The opening perimeter may be formed by an edge of the threshold plate, and the opening perimeter may have a lower perimeter portion. The gate structure may have a gate plate with a perimeter edge including a lower edge portion. The lower edge portion of the gate plate may bypass the lower perimeter portion of the threshold plate when the gate structure moves toward the closed position to form a first shear point to shear any plant material extending through the passage opening.