A precast dam structure includes at least two precast segments coupled together via linkages and a flow path structure. The flow path structure defines a flow path having an intake port and a draft port and is associated with at least one of the at least two precast segments. The flow path structure is configured to provide a change in flow direction, either internally or externally, from the at least one of the at least two precast segments.

A sea water intake system comprising a main sea water intake pipe, one end of the sea water intake pipe being provided with a centrifugal chamber, the chamber having at least one tangential inlet for entry of sea water to cause rotation of the sea water in the chamber. The other end of the intake pipe terminates in a sump, the sump having a water level lower than that of sea level and having a pump to transport sea water from the sump through a delivery pipe to a treatment plant. A central region of the centrifugal chamber is in fluid communication with a substantially vertical airlift pipe having an air inlet at, or close, to the chamber and a water exit remote from the chamber.

An exemplary turbine system for generating hydroelectric power. The exemplary turbine system is generally installed in shallow waterways and accelerates water flowing therein. The accelerated water generates power via spinning one or more turbine rotors of the system. An exemplary method for installing the turbine system is disclosed. The method includes first lowering a turbine system base into the shallow waterway, where the base includes a depression for accepting a mortise insert. The mortise insert includes one or more sockets for accepting notches in a base plate, where the base plate is coupled to one or more turbine rotors. The base plate mates with the mortise insert for ease of installation and securely positioning the one or more turbine rotors within the system.

An exemplary turbine system for generating hydroelectric power. The exemplary turbine system is generally installed in shallow waterways and accelerates water flowing therein. The accelerated water generates power via spinning one or more turbine rotors of the system. An exemplary method for installing the turbine system is disclosed. The method includes first lowering a turbine system base into the shallow waterway, where the base includes a depression for accepting a mortise insert. The mortise insert includes one or more sockets for accepting notches in a base plate, where the base plate is coupled to one or more turbine rotors. The base plate mates with the mortise insert for ease of installation and securely positioning the one or more turbine rotors within the system.

A hydroelectric power generating apparatus includes a check dam mounted on a hilltop portion of a hillside to accumulate water of a river reach, a power generating device mounted on a hill bottom portion of the hillside to be driven by a kinetic energy carried by the water for power generation, a diversion pipe extending from the check dam to the power generating device and having at least one diversion duct which extends along the river reach to make a pipeline that converts gravitational potential energy of the water into the kinetic energy, and a surge tank disposed to stand uprightly from the diversion duct for balancing pressure in the diversion duct.

A hydroelectric power generating apparatus includes a check dam mounted on a hilltop portion of a hillside to accumulate water of a river reach, a power generating device mounted on a hill bottom portion of the hillside to be driven by a kinetic energy carried by the water for power generation, a diversion pipe extending from the check dam to the power generating device and having at least one diversion duct which extends along the river reach to make a pipeline that converts gravitational potential energy of the water into the kinetic energy, and a surge tank disposed to stand uprightly from the diversion duct for balancing pressure in the diversion duct.

The cubical support for a foot valve is configured for use with a foot valve. The cubical support for a foot valve is an openwork framework structure. The cubical support for a foot valve elevates the foot valve above the bed of a body of water. The framework structure forms a protected space around the foot valve. The openwork structure allows for the free flow of water. The cubical support for a foot valve comprises a plurality of pipes, a plurality of tee connectors, a plurality of 90-degree elbow tees, and an adhesive. The plurality of tee connectors and the plurality of 90-degree elbow tees assemble the plurality of pipes into the framework structure. The adhesive secures each congruent end of each pipe selected from the plurality of pipes to a fitting selected from the group consisting of the plurality of tee connectors, and the plurality of 90-degree elbow tees.

The cubical support for a foot valve is configured for use with a foot valve. The cubical support for a foot valve is an openwork framework structure. The cubical support for a foot valve elevates the foot valve above the bed of a body of water. The framework structure forms a protected space around the foot valve. The openwork structure allows for the free flow of water. The cubical support for a foot valve comprises a plurality of pipes, a plurality of tee connectors, a plurality of 90-degree elbow tees, and an adhesive. The plurality of tee connectors and the plurality of 90-degree elbow tees assemble the plurality of pipes into the framework structure. The adhesive secures each congruent end of each pipe selected from the plurality of pipes to a fitting selected from the group consisting of the plurality of tee connectors, and the plurality of 90-degree elbow tees.

A precast dam structure includes at least two precast segments coupled together via linkages and a flow path structure. The flow path structure defines a flow path having an intake port and a draft port and is associated with at least one of the at least two precast segments. The flow path structure is configured to provide a change in flow direction, either internally or externally, from the at least one of the at least two precast segments.

Provided is a lateral water intake structure for preventing silting of bed load and floating debris, which is provided at a river bank. The lateral water intake structure includes: a diversion canal, a guiding wall structure, a shaft-shaped water intaking space, and a trash rack. The lateral water intake structure functions to prevent the floating debris from gathering at the surface of the trash rack and reduce a risk that the trash rack is damaged by water pressure and hitting of the floating debris. Meanwhile, by using a water flow in the watercourse to continuously wash the floating debris near the trash rack, maintenance costs of removing the floating debris at the trash rack manually or mechanically can be reduced.