Fish way with ovoid fish-passing holes

Abstract

The invention discloses a fish way with ovoid fish-passing holes which are formed on the channel partitioning board of the fish way, wherein, each ovoid fish-passing hole comprises a circular first half part and an elliptic second half part; and the diameter of the first half part is equal to the minor axis length of the second half part. The invention has the advantages of simple structure, easy manufacture, convenient maintenance, high economic efficiency and practicability and good hydraulic characteristics; and the invention can generate the flow structure for fishes to migrate.

Description

technical field [0001] The invention relates to a fishway with an oval fish hole. technical background [0002] Our province is rich in coastal fish resources, and there are many migratory fish, such as shad, anchovy, perch, sole, whitebait, etc. These fish require going back to inland rivers and lakes to spawn or feed for fattening. After the tidal gate is completed, the upstream of the gate becomes a freshwater environment. Freshwater fish (herring, grass carp, silver carp, bighead carp, carp, crucian carp, etc.) are often washed down the gate with the opening of the gate, but due to the gate blocking lost his way back and died in salt water. In order to communicate the migration channels of fish and maintain biological diversity, fishways are usually set up in the tide lock hubs to achieve the goal of harmonious development of water resources development and ecological environment. [0003] A fishway is an artificial tank for fish to migrate through a sluice or dam. Th...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the prior art that the wake of the leading fish cannot be simulated and the number of passing fish schools is small, the present invention provides an oval pass that can simulate the wake of the leading fish swimming upstream and benefit the swimming fish. fishway of fish hole

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