The invention discloses a process to implement and maintain water bodies larger than 15,000 m.sup.3 for recreational use, such as lakes or artificial lagoons, with excellent color, transparency and cleanness properties at low cost, which comprises the following steps: a.providing a structure able to contain a large water body larger than 15,000 m.sup.3; b.feeding the structure of step (a) with inlet water having iron and manganese levels lower than 1.5 ppm and turbidity lower than 5 NTU; c.measuring water pH, ideally it should be within a range lower than 7.8; d.adding an oxidizing agent to the water contained in the structure of step (a), with which a 600 mV minimal ORP is controlled in water for a minimal period of 4 hours and in maximal cycles of 48 hours; e.adding a flocculating agent in concentrations within 0.02 and 1 ppm with maximal frequencies of 6 days and cleaning the bottom of the structure of step (a) with a suction device to remove precipitated impurities from the bottom of said structure, together with the additional flocculants and;
f.generating a displacement of surface water containing impurities and surface oils by means of the injection of inlet water according to step (b), which generates said displacement in such a way to remove said surface water by means of a system for impurities and surface oils removal arranged in the structure of step (a), which together with step (e) replaces traditional filtering. The present invention also discloses a structure to contain large water bodies comprising a system for the removal of impurities and surface oils by means of skimmers and the suction device to clean said structure.

An apparatus for holding back, and diverting, fish in bodies of water by the arrangement of parallel cables (S) braced between two or more abutments (W), wherein the distance between the cables is small enough to prevent fish from swimming through the apparatus.

An apparatus for holding back, and diverting, fish in bodies of water by the arrangement of parallel cables (S) braced between two or more abutments (W), wherein the distance between the cables is small enough to prevent fish from swimming through the apparatus.

A seawater-based high resistance grounding device for a subsea transformer includes an insulated pipe mounted to the outside of the transformer so as to be exposed to seawater. The insulated pipe has two or more cylindrical metallic electrodes electrically connected to ground and to the neutral node of the secondary transformer windings. The volume of seawater within the pipe and between the electrodes provides one or more high resistance ground paths for protection of the transformer.

A seawater-based high resistance grounding device for a subsea transformer includes an insulated pipe mounted to the outside of the transformer so as to be exposed to seawater. The insulated pipe has two or more cylindrical metallic electrodes electrically connected to ground and to the neutral node of the secondary transformer windings. The volume of seawater within the pipe and between the electrodes provides one or more high resistance ground paths for protection of the transformer.

A protective flood barrier to protect a building and/or utility installation from flood waters that includes a continuous, water-tight base foundation surrounding and positioned in close proximity of the building; a plurality of removable structural stands adapted for placement on the base foundation wherein the structural stands have a proximal end situated adjacent the base foundation and a distal end; a sealing liner for placement on the structural stand; and a base seal for sealing the sealing liner to the base foundation.

This invention provides a disaster prevention system capable of taking an effective measure against a flood disaster. According to one embodiment, a disaster prevention system comprises a weather prediction unit configured to calculate a predicted rainfall in a region based on rainfall information necessary for protecting the region from a flood; an analysis unit configured to determine, based on the predicted rainfall calculated by the weather prediction unit, whether a flood can occur in the region; and a control unit configured to control to close a water stop gate provided in the region to protect the region from the flood if the analysis unit determines that the flood can occur in the region.

In its various embodiments the water current shield may be used to improve safety for a diver and/or a remotely operated vehicle (ROV) by shielding them from water currents at an underwater work site, thereby allowing them to avoid excess fatigue from the water currents at the underwater work site. It may also extend an environmental range in which projects can proceed without facing the need to go on weather standby or off hire. The water current shield generally comprises a frame; a predetermined set of louver assemblies operatively connected to the frame, where each louver assembly comprises one or more selectably movable louvers; and a louver mover operatively connected to each selectably movable louver.

In its various embodiments the water current shield may be used to improve safety for a diver and/or a remotely operated vehicle (ROV) by shielding them from water currents at an underwater work site, thereby allowing them to avoid excess fatigue from the water currents at the underwater work site. It may also extend an environmental range in which projects can proceed without facing the need to go on weather standby or off hire. The water current shield generally comprises a frame; a predetermined set of louver assemblies operatively connected to the frame, where each louver assembly comprises one or more selectably movable louvers; and a louver mover operatively connected to each selectably movable louver.

A reservoir shading structure made of multiple consumer beverage containers. The containers each have a bottle portion, and a top portion preferably with a collar. The top portion is removed, inverted, and replaced in the bottle portion to extend into the bottle portion. The top portion is hermetically sealed to the bottle portion and a cap is welded into the top portion to hermetically seal the consumer beverage container. The consumer beverage containers are UV resistant, made of NSF/ANSI Rule 61 compliant material, and may include carbon black in their construction. Multiple consumer beverage containers are placed in a uniform layer across the surface of the reservoir to form a shading structure that reduces evaporation and microbial growth.