Fish collecting weir system with function of fish rheotaxis research

Abstract

The invention provides a fish collecting weir system with the function of fish rheotaxis research. The fish collecting weir system comprises a fish stopping and guiding device and a flow passing channel formed in one side of the fish stopping and guiding device, and is characterized in that the fish stopping and guiding device comprises fixed anchorages arranged on the bank of a river, grid framesare fixedly connected to the fixed anchorages, and grid pieces and grid meshes are arranged at intervals on the grid frames; the flow passing channel is divided into an upper layer, a middle layer and a lower layer, the upper layer is a laminar flow channel, the middle layer is a water collecting tank, the lower layer is a monitoring channel which is formed in one side of the laminar flow channel, and the fish collecting box is installed at one end of the laminar flow channel; the monitoring channel is adjacent to the grid meshes and the grid pieces. Through the fish collecting weir system, which kind of fishes has the habit of rheotaxis upstream bounding at a river segment can be adjusted, the time period of upsteam bounding of the fishes is determined, the size of the fishes with upstream bounding, a water body environment wher rheotaxis occurs and other indexes are determined, and by the utilization of a fish stopping and guiding procedure, the aims of monitoring the rheotaxis of the fishes in real time and catching fish resources are realized.

Description

technical field [0001] The invention relates to a fish collecting weir system with the function of researching fish flow tendency, and belongs to the field of fish protection under the background of water conservancy engineering. Background technique [0002] Current is defined as the behavioral preference of fish to the stimulation of water flow. Fish swimming downstream is called negative current, and fish moving upstream against the current is called positive current. In the design of fish passing facilities in water ecological protection of hydraulic engineering, the study of fish flow tendency is extremely important. During the design process of fish passing facilities, it is necessary to determine the fish passing objects, fish passing targets, fish passing seasons and fish passing specifications in the affected river section, and the study of fish flow tendency is beneficial to determine the above indicators. [0003] The research on fish flow tendency can be divided...

AI Technical Summary

Problems solved by technology

The disadvantage of the indoor test is that the water flow environment is controlled, and the current behavior of fish in the natural river section cannot be accurately predicted; for the monitoring of hydroacoustic instruments, although the number of fish passing through the monitoring section can be monitored, it is difficult to distinguish the fish species, and monitoring The scope is limited; for simple video monitoring, due to the small monitoring range of the camera, it is often not selected, but if the video monitoring method is combined with other fish blocking and fish guiding measures, its monitoring effect and efficiency will be greatly improved

Images