Device and method of realizing complex flow field of aquatic organism ecohydraulics experiment

Abstract

The present invention discloses a device and method of realizing a complex flow field of an aquatic organism ecohydraulics experiment. An experimental device is an annular water tank and is formed byconnecting a first arc-shaped water tank, a first heteromorphic water tank, a second arc-shaped water tank and a second heteromorphic water tank end to end orderly, wherein the inner walls of the first heteromorphic water tank and the second heteromorphic water tank are both planes, and the width between the outer wall and the inner wall is increased gradually from the two ends to the middle; a first baffle is arranged in the first heteromorphic water tank along a length direction, a second baffle is arranged in the second heteromorphic water tank along the length direction, and the flow propellers and the submersible pumps are also arranged in the heteromorphic water tanks. The realization method of the present invention adopts the different combinations of the flow propellers and the submersible pumps to realize different maximum flow velocities, and the experimental device of the present invention can realize the complex flow field, is more suitable for the parent fish oviposition research.

Description

technical field [0001] The invention relates to the technical field of ecology, in particular to a complex flow field realization device and method for aquatic organism eco-hydraulic experiments. Background technique [0002] The main breeding grounds of the four major Chinese carps (grass carp, herring, silver carp, and bighead carp), which are important economic fish in China, are located in the Yangtze River, and their output accounts for about 70% of the total national output. The breeding time is mainly from May to July each year. Since the 1980s, the resources of the four major domestic fishes have experienced serious decline. After 2003, affected by the operation and adjustment of the Three Gorges Project, the hydraulic conditions of the middle and lower reaches of the river changed. The spawning grounds of the four major domestic carp were reduced in size, merged, and moved, and the resources of the four major domestic carps decreased significantly. [0003] In orde...

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Problems solved by technology

Another patent "a flume device based on the research of aquatic organism ecosystem (CN201420697219.7)" discloses a flume device based on the research of aquatic organism ecosystem, which includes an annular flume, an outer flume, an inner flume, a propeller and a motor, The inner water tank is located in the outer water tank, the annular water tank is a runway type, and the annular water tank is located in the inner water tank; the oval area surrounded by the annular water tank is the still water area; the straight section area of ​​the annular water tank is the experimental section; the propeller is set in the ring water tank. A semi-circular section; the motor is connected to the propeller; a buffer zone is formed between the outer tank and the inner tank, and the bottom of the buffer zone is connected to the experimental section; but the experimental flow rate of this patent can only reach 0.8m / s, which cannot meet the requirements of fish spawning at high speeds. Complex Flow Requirements

[0005] Research has found that flow rate is the key driving factor for inducing the spawning of the four major family carp; however, there is no experimental method and experimental device for using large-scale tank experiments to study the flow rate to stimulate broodstock spawning

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