A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The present invention relates to a stepped fish ladder and, more specifically, relates to a stepped fish ladder wherein a tailrace is formed in a middle of a dam shoulder; side walls are formed on both sides of the tailrace in a downstream of the dam shoulder; a water cushion is formed in a longitudinal end of both side walls; and an inclined waterway is formed from the tailrace to the water cushion. In the waterway, first weirs vertically protruding from a lower part of one side wall among both side walls and second weirs vertically protruding from the lower part of an other side wall among both side walls are alternately formed at least one more time to form the fish ladder formed in the waterway in a zigzag; thereby minimizing a length of the fish ladder (the length from the upstream to the downstream), and allowing fishes to trace a stream upwards. As such, the present invention minimizes construction costs of a sedimental control dam, and reduces a construction period of the sedimental control dam by minimizing a longitudinal length of the fish ladder installed in the sedimental control dam. Also, the present invention allows fishes, reptiles, and others to smoothly move upwards from the downstream by additionally constructing the fish ladder to the sedimental control dam through a simple construction process.
The present invention relates to a stepped fish ladder and, more specifically, relates to a stepped fish ladder wherein a tailrace is formed in a middle of a dam shoulder; side walls are formed on both sides of the tailrace in a downstream of the dam shoulder; a water cushion is formed in a longitudinal end of both side walls; and an inclined waterway is formed from the tailrace to the water cushion. In the waterway, first weirs vertically protruding from a lower part of one side wall among both side walls and second weirs vertically protruding from the lower part of an other side wall among both side walls are alternately formed at least one more time to form the fish ladder formed in the waterway in a zigzag; thereby minimizing a length of the fish ladder (the length from the upstream to the downstream), and allowing fishes to trace a stream upwards. As such, the present invention minimizes construction costs of a sedimental control dam, and reduces a construction period of the sedimental control dam by minimizing a longitudinal length of the fish ladder installed in the sedimental control dam. Also, the present invention allows fishes, reptiles, and others to smoothly move upwards from the downstream by additionally constructing the fish ladder to the sedimental control dam through a simple construction process.
A FISH LADDER
CHEN ZHEN YUAN (author)
2015-09-09
Patent
Electronic Resource
Korean
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau