A method and system for attracting fish by using jet

Abstract

The invention relates to a method and system for luring fishes with flow jetting. The system comprises a fish blocking flow jetting pipe arranged on the up stream of a fishway inlet. A plurality of fish blocking flow jetting holes are formed in a straight-line mode in the length direction of the fish blocking flow jetting pipe, and alpha fish blocking angles are formed between the outlet flow jetting lines of the fish blocking flow jetting holes and a riverway. A plurality of fish luring flow jetting pipes are arranged on the down stream of the fishway inlet along the riverway, a plurality of fish luring flow jetting holes are formed in the fish luring flow jetting pipes in a straight-line mode in the length directions of the fish luring flow jetting pipes, and gamma fish luring angles are formed between the outlet flow jetting lines of the fish luring flow jetting holes and the riverway. According to the method and system, fish blocking flow jetting and fish luring flow jetting are generated through flowing of water flow, and the fishes are prevented from going over the fishway inlet through fish blocking flow jetting, guided by fish luring flow jetting to enter a fishway and prevented from losing the direction. Compared with a traditional water replenishment fish luring mode, water consumption of fish blocking flow jetting and fish luring flow jetting is remarkably reduced, a large number of water conservancy resources are saved, and the method and system are simple in project construction, convenient to operate and suitable for various water conservancy projects.

Description

technical field [0001] The invention relates to a method and system for luring fish by using a jet, which is an environmental protection method and system, and a hydraulic method and system for protecting fish ecology. Background technique [0002] In the layout pattern of water conservancy projects, due to its small geometric size, the width of fishway engineering is usually only 2~5m, which accounts for a small proportion compared with the entire river width of hundreds of meters or even kilometers, so it is called The "needle's eye" project, coupled with the very small flow rate of the fishway project, makes it difficult for fish to sense the flow direction of the fishway entrance during the process of upstream upstream from the downstream of the river, resulting in a large number of fish difficult to find the fishway entrance, resulting in serious Affect the fish passing efficiency of the fishway. Therefore, how to improve the fish collection effect at the entrance of t...

AI Technical Summary

Problems solved by technology

For example, the authorized announcement number is CN202705996U, which introduces a segmented water replenishment system at the entrance of the fishway. This fish luring measure has the following deficiencies: 1. In the water replenishment pipe network with a tree structure, the flow distribution of each branch pipe is uneven, which is prone to multiple 2. There are multiple valves, sensors, signal devices, etc. in the pipe network, making the system complicated and difficult to operate and manage

The patent with the authorized announcement number CN2444417Y proposes a fish luring lamp, which uses light to lure fish. The disadvantages of this fish luring measure are: 1. The river water contains floating objects, suspended objects, silt, aquatic plants, etc., and the turbidity of the water quality Higher, so the light transmission distance is shorter, and the fish luring range is smaller; 2. The cable is soaked in river water, which is prone to hydroelectric accidents

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