A portable hydropower module is provided for the generation of economical hydroelectric power at low-head sites, such as dams and weirs. More particularly, the portable hydropower modules are able to streamline the construction of power generation facilities and improve the economics of hydropower development for low-head sites. The portable hydropower modules may be produced off-site and then transported, such as by floating, to the designated low-head site. The portable hydropower modules may be specifically designed to efficiently facilitate the energy capabilities at the chosen low-head sites.

A gate valve for use in controlling the level of a dam has a first plate with an aperture on an upstream face of the dam and a movable plate on the upstream side of the fixed plate, with apertures sized and dimensioned to operate as a scissors when the movable plate is urged in a linear motion parallel to fixed plate. One or more edges of the apertures in the plates are provided with a sharp edge or a serrate edge oriented to sever obstructing object present in the apertures when the valve is transitioning from an open position to a closed position.

A wall faucet is disclosed which has an elongated section of a PEX tube inserted into the water inlet pipe of the wall faucet. The PEX tube is capable of expanding should there be water in the water inlet pipe during freezing temperatures thereby preventing the water inlet pipe from bursting.

A hydroelectric generation device has a main channel, at least one branch channel, at least one storage unit, and at least one generator set. The at least one storage unit is mounted in the at least one branch channel, and each storage unit has a container. The at least one generator set is mounted respectively in the at least one storage unit, and each generator set has a generating tube, at least one connection pipe, and a generating unit. The generating tube is mounted in the container. The at least one connection pipe is connected with the generating tube and is bent into an inverted L shape. The generating unit has at least one blade wheel assembly mounted rotatably in the generating tube.

A hydroelectric generation device has a main channel, at least one branch channel, at least one storage unit, and at least one generator set. The at least one storage unit is mounted in the at least one branch channel, and each storage unit has a container. The at least one generator set is mounted respectively in the at least one storage unit, and each generator set has a generating tube, at least one connection pipe, and a generating unit. The generating tube is mounted in the container. The at least one connection pipe is connected with the generating tube and is bent into an inverted L shape. The generating unit has at least one blade wheel assembly mounted rotatably in the generating tube.

The invention discloses a reservoir tail reverse regulation method for native fish protection, comprising the steps that firstly, a breeding habitat of native fishes at reservoir tail of a cascade hydroelectric dam is determined; secondly, breeding characteristics of migration native fishes are determined, and an ecological conservation project of a reach of the breeding habitat at reservoir tail is carried out; thirdly, the length of the reservoir tail of a downstream hydropower station of a cascade hydroelectric project in March to May is determined through a field investigation, and the maximum range of a natural river channel downstream of the upstream cascade power station is judged and finally, the flow state of the reach at reservoir tail is reversely regulated to achieve the goal of discharging water of the natural river channel at the reservoir tail and ensuring the natural flow state of the natural river channel.

Aquatic curtain devices and methods for forming waterway channels and reducing waterway maintenance are disclosed. Each curtain device comprises an elongated float and an elongated flexible curtain depending from a first side of the elongated float. The curtain has a bottom end with a weight extending along the entire length of the elongated float. The float is configured to be sufficiently buoyant to support the curtain in an upward direction. Each curtain device is configured for the curtain to remain in a substantially taut state when in use and accommodate fluctuations in water levels, such that the elongated weight remains on the bottom of the waterway while the elongated float remains on the surface. Artificial channels are constructed by selecting the length of the elongated float to achieve the desired channel dimensions using two or more curtain devices positioned along a desired path in a waterway.

Aquatic curtain devices and methods for forming waterway channels and reducing waterway maintenance are disclosed. Each curtain device comprises an elongated float and an elongated flexible curtain depending from a first side of the elongated float. The curtain has a bottom end with a weight extending along the entire length of the elongated float. The float is configured to be sufficiently buoyant to support the curtain in an upward direction. Each curtain device is configured for the curtain to remain in a substantially taut state when in use and accommodate fluctuations in water levels, such that the elongated weight remains on the bottom of the waterway while the elongated float remains on the surface. Artificial channels are constructed by selecting the length of the elongated float to achieve the desired channel dimensions using two or more curtain devices positioned along a desired path in a waterway.

A hydrodynamic installation includes an upper water tank, a lower water tank, a water way system which has a plurality of partial water ways and which connects the upper water tank to the lower water tank. A hydraulic machine is arranged in the water way system, a water protection is arranged in a partial water way, and an electric drive provided for actuating the water protection. The electric drive is constructed in such a manner that it also ensures safe closing of the water protection in the event of a power failure without an emergency power supply being provided to this end.

A system includes first and second dam modules, a power generation unit, and first and second turbine modules. The first dam module can be secured to a foundation of a dam site and redirect a first flow of water. The second dam module can be secured to the first dam module opposite the foundation and redirect a second flow of water. The first turbine module can be secured to the foundation. The second turbine module can be secured to the first turbine module opposite the foundation. The power generation unit includes a turbine to be driven by a third flow of water at least partially including at least one of the first flow of water or the second flow of water. The first turbine module includes a draft tube having an inlet to receive water from the turbine and an outlet to discharge water from the first turbine module.