An air infiltration system for a hydroelectric plant includes a spillway gate and a linearized cone valve coupled to the spillway gate, the linearized cone valve having a pivotable plate assembly. The spillway gate may be a tainter or Stoney gate and the pivotable plate assembly may have a deflection plate. A method of infiltrating air in water released from an impoundment may include: lifting a spillway gate from a resting position proximate a bottom of a spillway; and pivoting a deflection plate coupled to the gate proximate the bottom of the spillway; wherein water flows through an opening disposed between the deflection plate and the gate and is sprayed into an atmosphere to be oxygenated.

Fluid flow enhancing devices disclosed herein are adapted to enhance flow of fluid through subsurface watershed conduits, for example, culverts, drainpipe and the like. Such fluid flow enhancing devices advantageously enhance watershed runoff functionality in subsurface watershed conduits by altering watershed flow from a parabolic flow pattern to a rotational flow pattern while still accommodating fish passage requirements. This change in flow pattern beneficially provides turbulence that disrupts and flushes debris out of the subsurface watershed conduits. This disruption and flushing establishes a passive cleaning functionality within the subsurface watershed conduits that serves to clean the subsurface watershed conduits after suitable upstream water delivery event (e.g., heavy rain, controlled water release, etc.). In doing so, these fluid flow enhancing devices overcome one or more shortcomings associated with subsurface watershed conduits in a manner that overcomes drawbacks associated with conventional design and in-use considerations for such subsurface watershed conduits.

Fluid flow enhancing devices disclosed herein are adapted to enhance flow of fluid through subsurface watershed conduits, for example, culverts, drainpipe and the like. Such fluid flow enhancing devices advantageously enhance watershed runoff functionality in subsurface watershed conduits by altering watershed flow from a parabolic flow pattern to a rotational flow pattern while still accommodating fish passage requirements. This change in flow pattern beneficially provides turbulence that disrupts and flushes debris out of the subsurface watershed conduits. This disruption and flushing establishes a passive cleaning functionality within the subsurface watershed conduits that serves to clean the subsurface watershed conduits after suitable upstream water delivery event (e.g., heavy rain, controlled water release, etc.). In doing so, these fluid flow enhancing devices overcome one or more shortcomings associated with subsurface watershed conduits in a manner that overcomes drawbacks associated with conventional design and in-use considerations for such subsurface watershed conduits.

Disclosed is a triangular modular ecological seawall, including a plurality of first prefabricated frames arranged in an array, a second prefabricated frame and a wave break forest which are disposed between two adjacent first prefabricated frames and fill gaps between the first prefabricated frames, the first prefabricated frame and the second prefabricated frame are tubular and each have a triangular cross-section shape, and inner cavities of the first prefabricated frame and the second prefabricated frame are respectively filled with first sea sand.

Disclosed is a triangular modular ecological seawall, including a plurality of first prefabricated frames arranged in an array, a second prefabricated frame and a wave break forest which are disposed between two adjacent first prefabricated frames and fill gaps between the first prefabricated frames, the first prefabricated frame and the second prefabricated frame are tubular and each have a triangular cross-section shape, and inner cavities of the first prefabricated frame and the second prefabricated frame are respectively filled with first sea sand.

Disclosed is a triangular modular ecological seawall, including a plurality of first prefabricated frames arranged in an array, a second prefabricated frame and a wave break forest which are disposed between two adjacent first prefabricated frames and fill gaps between the first prefabricated frames, the first prefabricated frame and the second prefabricated frame are tubular and each have a triangular cross-section shape, and inner cavities of the first prefabricated frame and the second prefabricated frame are respectively filled with first sea sand.

Disclosed is a triangular modular ecological seawall, including a plurality of first prefabricated frames arranged in an array, a second prefabricated frame and a wave break forest which are disposed between two adjacent first prefabricated frames and fill gaps between the first prefabricated frames, the first prefabricated frame and the second prefabricated frame are tubular and each have a triangular cross-section shape, and inner cavities of the first prefabricated frame and the second prefabricated frame are respectively filled with first sea sand.

An ash management trench system is provided for harvesting byproducts from sluice water, such as a discharge from a power plant. The system comprises a first section comprising at least one flow control structure. The at least one flow structure is typically configured to capture a predetermined byproduct. The system further comprises a second section comprising a stilling basin. The second section is coupled to the first section by a connection structure.

An ash management trench system is provided for harvesting byproducts from sluice water, such as a discharge from a power plant. The system comprises a first section comprising at least one flow control structure. The at least one flow structure is typically configured to capture a predetermined byproduct. The system further comprises a second section comprising a stilling basin. The second section is coupled to the first section by a connection structure.

A process for the treatment of thick fine tailings that include constituents of concern (CoCs) and suspended solids is provided. The process includes subjecting the thick fine tailings to treatments including chemical immobilization of the CoCs, polymer flocculation of the suspended solids, and dewatering. The chemical immobilization can include the addition of compounds enabling the insolubilization of the CoCs. Subjecting the thick fine tailings to chemical immobilization and polymer flocculation can facilitate production of a reclamation-ready material, which can enable disposing of the material as part of a permanent aquatic storage structure (PASS).