A method for testing fish-induced flow velocity
A testing method and fish technology, applied in the field of testing fish induced flow velocity and fish swimming speed, can solve problems such as uncertainty about whether fish can perceive, difficulty in judging behavior, and inductive flow velocity cannot be directly applied to ecological fishways.
Active Publication Date: 2020-02-07
NANJING HYDRAULIC RES INST
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Problems solved by technology
[0003] However, in actual operation, due to the particularity of some fish, the induced flow velocity measured by common methods cannot be directly applied in the design of ecological fishways.
For example, for the fish of the genus Lithocarpus, because they have suction cups that can be adsorbed on rocks, there is no obvious U-turn or reverse flow behavior when the flow rate increases, so the measured flow rate at this time cannot be used as the induced flow rate of this kind of fish.
That is to say, it is difficult to judge the behavior, and the measured flow velocity cannot determine whether the fish can perceive
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Embodiment 1
[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0021] A method for testing fish-induced flow velocity, comprising: a fish-swimming test device, arrangement of test sections of the fish-swimming test device, test process for fish-induced flow velocity, and statistics of test data.
[0022] Described fish swimming test device comprises (see figure 1 ): Outer water tank 1, ring road 2, test section 3, propeller 4, variable frequency motor 5, said ring road 2 is set inside the outer water tank 1, test section 3 takes a straight section on the ring road 2, and propeller 4 goes deep The circuit 2 is driven by a variable frequency motor 5 to push the water body in the circuit 2 to move.
[0023] The test section arrangement of described fish swimming test device refers to (see figure 2 image 3 ): set the perforated plate 6 on the test section;
[0024] Described perforated plate is designe...
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The invention provides a method for testing flow velocity induction of fish, in particular a method for testing the flow velocity induction of the fish during constructing an ecological fishway, and belongs to the field of test for ecological environmental protection in water conservancy projects. The method for testing the flow velocity induction of the fish comprises the steps of preparing a fish swimming testing device; arranging a testing section for the fish swimming testing device; testing the flow velocity induction of the fish; counting the testing data. The method for testing the flow velocity induction of the fish has the advantages that the problem of testing the flow velocity induction of echeneis naucrates can be solved, and the velocity tested by the method is adopted in the fishway design, which helps echeneis naucrates flow through the fishway.
Description
technical field [0001] The invention relates to a method for testing the induced flow velocity of fish, in particular to a method for testing the swimming speed of fish used in the construction of an ecological fishway, and belongs to the field of ecological environment protection experiments in water conservancy projects. Background technique [0002] The induction flow rate test is generally based on the adjustment of the swimming direction of the fish. There are two main methods for the test. The first is to test the group. Put 10 test fish in the tank and gradually increase the flow rate until half of the test fish turn around. In the countercurrent direction, the flow velocity at this time is the induced flow velocity of the test fish population. Another test method is for individuals. Place the test fish alone in the still water of the tank, and then gradually increase the flow rate until the test fish turns to the countercurrent direction. At this time, the flow rate ...
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IPC IPC(8): A01K61/10A01K29/00
CPCA01K61/00Y02A40/81
Inventor 杨宇韩昌海宣国祥李艳富张文明范丽丽张晓红刘火箭祝龙
Owner NANJING HYDRAULIC RES INST