Migratory fishway device

Abstract

The present invention relates to a migratory fishway arrangement for arranging the flow of water upstream past obstacles in the flow, such as a dam in the riverbed, in the direction of the natural flow in the riverbed, wherein the arrangement comprises hydraulic flow means, hydraulic flow means comprising a first access pipe (1) from an upstream position relative to the dam (4), i.e. from an entry point (12), to a downstream position relative to the dam, i.e. to a feed point (2), in which there is a fish gate so that Fish enter the riser (3) and enter the water in said riser from said feed point (2) to be transported in the riser (3) to an outlet at an upstream position relative to the dam (5) where the entry point (12) is at a higher water level than the outlet (5). The invention also relates to a system for guiding migratory fish past a dam (4) comprising said migratory fish pass means and additionally comprising a position from upstream (217B) relative to the dam (4) to ) downstream (217A) position to form a siphon (134) for the return route of migratory fish.

Description

technical field [0001] On a very general level, embodiments of the present invention relate to river system formation, but more specifically, to making such waterways undisturbed by river systems to allow migratory fish to spawn upstream even in built waters. More particularly, however, embodiments of the invention relate to a hydraulic flow device according to the preamble of the independent claim, which is directed to such a hydraulic flow device. Embodiments of the invention also relate to a migratory fishway unit for implementing a system using the device. Background technique [0002] Humanity needs to build power plants to utilize renewable energy in energy production, which is therefore also a direct damage to nature itself, but additionally benefits nature as a source of livelihood. [0003] Migratory fish (particularly Salmoniformes, Eeleliformes, and / or the like) that migrate upstream back to their birth rivers to spawn encounter obstructions in rivers in which th...

AI Technical Summary

Problems solved by technology

like figure 1 As indicated, fish ladders are constructed on a large scale and would be poor if fully conformed to the landscape, and are also expensive to construct (also including materials) by pouring concrete and reinforcement and foundation works, for such a large construction the material requirements are obviously

The assembly of the fish ladder also takes a long time with all the earth excavation potentially disturbing the landscape 115 and also potentially disturbing the downstream waters near the fish ladder

[0007] exist figure 1 In the example of , the fish ladder 100 has been arranged by a structure to pass through the waterways 117A, 117B (if the bypass passage 100 is not completed, the bending of the entire path of the waterway will be more expensive

Energy available from flowing water 109 will likely not be available, or if not poorly during construction)

Images