Fish ladder facility

Abstract

Present invention comprises a separate bypass channel that is installed on one side of the dam connecting upstream and downstream; water supply for fish ladder which is installed upstream, spillway wall disposed downstream of dam and having groove, a first fish ladder facility which connects said water supply and the spillway wall and has a predetermined number of the partition wall with a passage opening respectively, which are structured in a stepwise manner The first even and facility are installed on the upstream side inlet of the bypass channel is configured; and a second fish ladder facility which comprises inclined channel installed for discharging water to the side of the dam, sloping and comb wall contiguous installed to alternately at predetermined intervals on both sides of the main wall of the inclined channel, and movement passage in the shape of pipe shape that connects upstream and downstream on the inner bottom of the dam, which is provided in the middle of said bypass channel.

Description

FIELD OF INVENTION[0001]The present invention is related with a fish ladder facility, in particular with fish ladder facility which can be installed in an existing dams, regardless of the size of the dam in the form to be bypassed in a river, even when the depth of the river is low because of dry season, the facility being provide a secure retention space and ease of movement is for homing instinct fishes as well as a solid structure designed to minimize resistance for permanent use, to provide people with watching a moving image of reentry fish and a learning site.BACKGROUND OF THE INVENTION[0002]In general, agricultural water or drinking water and hydroelectric power to secure water resources by installing a concrete dam can be preserved in the dam and the dam produces electricity by installing a power plant. However, at the same time, the dam acts as a barrier to restrict the free movement of homing instinct fishes and have dysfunctional disadvantage of destroying the ecosystem.[...

AI Technical Summary

Benefits of technology

The present invention involves a dam with a separate bypass channel and two fish ladder facilities. The first fish ladder facility is connected to the spillway wall and has a predetermined number of partition walls with a passage opening. The second fish ladder facility has an inclined channel with sloping and comb wall contiguous installed to alternately at predetermined intervals on both sides of the main wall, and a movement passage in the shape of a pipe connected upstream and downstream on the inner bottom of the dam. The invention also includes a pond with a pumping facility and a shelter in the form of a pool on each side of the first fish ladder facility. The fish ladder facility further includes a contoured shape of the groove and artificial plants attached to the movement passage. The flow channels of the second fish ladder facility are composed of zigzag pattern. The invention allows for the promotion of ecological learning centers, prevents the run-out of homing instinct fishes, and provides a space for the installation of dams.

Problems solved by technology

However, at the same time, the dam acts as a barrier to restrict the free movement of homing instinct fishes and have dysfunctional disadvantage of destroying the ecosystem.

However, a dam installed on rivers to ensure water will interfere with these homing instinct fishes to a situation that is facings a serious problem that can have many rare species extinction due to the construction of a dam.

In order to install the fish ladder in the existing dams, there are problems that are to be demolished and a new installation of dams with a huge budget and the period takes a lot.

In rainy season, the flow rate is large; the young fishes have to swim against the fast flowing forces of falling water from the facility, thus it is difficult to swim away back to the upstream for the homing instinct fishes.

In addition, even if a proper quantity of water is maintained, there is a problem that the depth is very shallow, providing sufficient quantity of water and relaxation space required for the movement of homing instinct fishes is not possible and the fishes can be easily captured by birds and humans.

In addition, because the conventional fish ladder is constructed on the middle of the dam, in rainy season, when the homing fishes do not migrate at all, the function is recovered the proper quantity of water, however, when a couple of days pass, this function may be lost.

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