System and method for observing and collecting migratory fish in fishway

Abstract

The invention discloses a system for observing and collecting migratory fish in a fishway. It includes an observation system and an acquisition system; the observation system is arranged on the side of the fishway main body or in the fishway main body, and the acquisition system is arranged on the side of the observation system. It overcomes the existing technology that directly sets up an observation room on the side wall of the fishway, can only observe and count, cannot collect fish or collects a small amount, and has low efficiency. Complete statistics require multiple fishing, which will easily lead to fish death and affect fish. It has the functions of observation, monitoring, counting and sampling, and does not affect the normal operation of the fishway. The fish collection efficiency is high, the damage to the fish is small, and the fish resources are not affected. It can be opened by different gates. It has the advantages of closing and adjusting the direction of water flow to clean and maintain the glass windows of the observation room. The invention also discloses a method for observing and collecting migratory fish in the fishway.

Description

technical field [0001] The invention relates to the field of fishway engineering, more specifically to a system for observing and collecting migratory fish in the fishway. The invention also relates to a method for observing and collecting migratory fish in the fishway. Background technique [0002] While water conservancy and hydropower projects exert their benefits in flood control, power generation, and shipping, they also have a non-negligible impact on the ecological environment, especially the barrier impact on fish migration channels; Fish protection measures have been adopted internationally for more than 220 years. The main types include fishways, fish elevators, lifting lock chambers, and fish collection and transportation systems. Among them, fishways have the best fish passing effect and the widest range of applications. Fishways account for about 90% of the built fish passing facilities in my country. [0003] The monitoring of fishways has always been an import...

AI Technical Summary

Problems solved by technology

[0004] At present, domestic and foreign monitoring programs basically set up observation rooms directly on the side walls of fishways to observe migratory fish in fishways. They can only observe and count fish, but cannot collect fish, nor can they monitor fish species. Identification and measurement, etc.; the currently used video and infrared monitoring cannot realize the identification and measurement of fish species, etc.

[0005] According to the prior art, if it is necessary to observe and collect the fish in the fishway, it is generally divided into two methods. The first is to intercept a number of pond chambers with a net, and use fishing gear and nets to catch the fish therein; Close the fishway outlet gate, drain part of the pool water and then take out the fish; the above two methods have the following disadvantages: (1) only the fish in several pools can be fished instantaneously, the collection amount is small, and the efficiency is low , if complete statistics are required, multiple fishing is required; (2) During the fishing process, the net gear is easy to damage the fish, and there is dehydration operation, which may easily lead to the death of the fish; (3) The sorting, identification and measurement work after the fish is collected The fish need to be lifted out of the fishway, and the lifting process is time-consuming and laborious; (4) The normal fish passing operation of the fishway is affected during collection;

Images