Movable bottom fish trapping device and method

Abstract

The invention discloses a movable demersal fish trapping and collection device and method. The device comprises a net cage frame, wherein multiple iron cables are fixedly mounted on the top of the net case frame, pulling ropes are connected to the iron cables, the top of each pulling rope is connected to a lifting device, the lifting device is fixedly mounted on a first water surface platform, a fish trapper is mounted in the net case frame and connected with a fish collection net case through a one-way fish passing channel, and a power device is connected with the fish trapper through a water pipe. The device is suitable for rivers with different flow rates and improves the fish collection effect.

Description

technical field [0001] The invention belongs to the technical field of ecological hydraulic engineering, and in particular relates to a movable bottom fish trapping device and method. Background technique [0002] The development of my country's water conservancy projects in recent decades has not only brought huge economic and social benefits, but also caused a great impact on the ecological environment on which we live. In particular, the construction of river blocking structures directly blocks the original river course, destroying the normal exchange of matter, energy, and biological communities in natural waters, resulting in a continuous decline in river connectivity. [0003] In order to solve the above problems, since the last century, foreign experience has been used for reference, and a number of fish passing facilities mainly based on fishways have been built. However, in the actual project operation, the operation effect of the fish passing facilities is not ver...

AI Technical Summary

Problems solved by technology

[0005] However, the traditional means or measures of fish luring by water flow are often greatly affected by local flow conditions, flow rate control is limited, and there are defects such as large water consumption and small fish collection range.

[0006] Publication No. CN102524146A discloses a fish trapping device for marine pastures, which mainly uses sound control to trap fish. The disadvantage is that the device structure is relatively complicated, and it is only suitable for ocean waters and the entire process of use. The device can only float on the water surface, not suitable for the induction of bottom fish

[0007] In the publication number CN103070097A, an artificial fish gathering protection device is disclosed. Although the device is simple in structure and easy to use, it has certain limitations in the use process, and the fish trapping effect is not very obvious, and the scope of application is small

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