Individual mode-based fishway fish passing simulation method
A simulation method and individual technology, applied to the simulation of the process of fish passage through low water head when predicting upward migration of fish, in the field of eco-hydraulic simulation, it can solve the problems of predicting the effect of fish passage in fish passage and the difficulty of predicting the effect of fish passage
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Embodiment 1
[0046] This embodiment is a fishway simulation method based on individual models, such as figure 1 shown.
[0047] In this embodiment, a research method combining fish behavior experiments with a two-dimensional hydraulic model is used to simulate the process of fish passing through the fishway.
[0048] The concrete steps of described method are as follows:
[0049] Step 1, the step of obtaining fish swimming ability data: Obtain the critical swimming speed of the target fish passing through the fish pass through indoor experiments and relative critical swimming speed .
[0050]
[0051] in, is the critical swimming speed, is the relative critical swimming speed, BL is the fish body length.
[0052] The indicators of fish swimming behavior characteristics mainly include critical swimming speed, which reflects the long-term swimming ability of fish, and is an important indicator for designing the mainstream of fishway ponds and determining the distance between p...
Embodiment 2
[0114] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment on the determination of the critical swimming speed. The assay method of the critical swimming speed of the target fish described in the present embodiment comprises the following sub-steps:
[0115] Conduct critical swimming speed pre-test: select one fish and place it in the experimental area of the critical swimming speed tank, and increase the speed by 0.4 every 2 minutes on the basis of adapting to the initial flow rate of the critical swimming speed tank. BL / s Increase the speed of the water flow until the experimental fish is fatigued, record the water flow rate that causes the experimental fish to be fatigued, and it is the critical swimming speed of the target fish U crit The estimated value of , where BL is the body length of the experimental fish; this sub-step uses at least three fish to repeat the experiment three times, and takes the average value of ...
Embodiment 3
[0125] This embodiment is an improvement of the above-mentioned embodiment, and is a refinement of the method for obtaining the flow rate of flow in the above-mentioned embodiment. The acquisition method of the flow tendency rate described in this embodiment is as follows:
[0126] The flow rate experiment was carried out in a conventional rectangular water tank, and the size of the flow rate tank was 8m×0.4m. In the experimental area, a measurement section was set every 0.7 m along the water flow direction, and 30 measurement points were set for each section, and the flow velocity was measured with a current meter.
[0127] Set at least 8 flow rate gradients in the flow rate tank; put 1 fish in each experiment, and measure at least 8 fish under each flow rate condition; put a single experimental fish in the experimental area before the experiment, and adapt to static water for 1 hour;
[0128] Adjust the flow rate, and adjust the flow rate to the target flow rate within 5 mi...
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