Fishway inlet system and design method for inducing grass carp and device for determining fish flow rate

Abstract

The invention relates to a fishway inlet system and design method for inducing grass carp and a device for determining the flow rate of fish, comprising: a fishway and its fishway inlet arranged along the river flow direction, and one side of the fishway and the fishway inlet is close to each other On one bank of the river, the other side is provided with a fish-lure water flow channel and a fish-lure water flow channel outlet in the same direction as the fishway and the fishway inlet. The present invention only needs to set up one water flow for luring fish, and the water flow condition for luring fish can be created by coordinating the water flow for luring fish with the water flow for fishway. There are only two water flow parameters that need to be calibrated: the optimal flow velocity at the fishway inlet and the optimal flow velocity ratio between the outlet flow velocity of the fish-lure water flow channel and the fishway inlet flow velocity. Compared with other water flow fish luring methods, two water flow parameter values ​​are clearly given. The water flow form of the fishway inlet is simple and the engineering quantity is small, not only can be directly used in the hydraulic design of the grass carp fishway inlet, but also can be easily extended to the fishway inlet water flow design of other fish species.

Description

technical field [0001] The invention relates to a fishway inlet system and design method for inducing grass carp and a device for determining the flow rate of fish. It is a supporting facility, method and device for a water conservancy development project, and a facility for ecological environment protection and biological reproduction. and methods and devices. Background technique [0002] According to statistics, at present, less than 50% of the fishways in the world can effectively pass fish. Many field observations show that fish cannot pass through the fishway project because it is difficult for fish to quickly find and enter the fishway entrance smoothly. The hydraulic design of the fishway entrance is a key factor affecting the success or failure of the fishway passage. In actual engineering, the layout of the entrance of the fishway is affected by the terrain and the layout of the entire water conservancy project. Some researchers have found that: fish approach the ...

AI Technical Summary

Problems solved by technology

[0002] According to statistics, currently less than 50% of the fishways in the world can effectively pass fish

For a specific target fish species, what is the optimal flow rate at the entrance of the fishway, how to replenish water to induce the fish, how to arrange the water flow to lure the fish, and how to determine the flow rate of the water flow to lure the fish are all important contents of the design of the fishway entrance, but At present, there is still a lack of a quantitative, practical and effective method of attracting fish with water flow at the fishway inlet that can determine the above four major problems, so as to guide the hydraulic design of the fishway inlet

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