System and method for observing and collecting migratory fishes in fish way

Abstract

The invention discloses a system for observing and collecting migratory fishes in a fish way. The system comprises an observing system and a collecting system, the observing system is arranged beside or in a fish way body, and the collecting system is arranged beside the observing system. The system overcomes the defect that an observing chamber directly arranged on the side wall of the fish way is only supportive of observing and counting and cannot collect fishes or is small in collection quantity and low in efficiency and the defect of influence on normal fish passing of the fish way due to proneness to fish death caused by the fact that several times of fishing are needed for complete counting in the prior art. The system has observing, monitoring, counting and sampling functions, and is free of influence on normal running of the fish way, high in fish collecting efficiency, little in damage to fishes and free of influence on fish resources and supportive of cleaning and maintaining a glass window of the observing chamber by opening and closing different gates to adjust flowing direction of water. The invention further discloses a method for observing and collecting the migratory fishes in the fish way.

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;

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