CN201479739U - Device for generation of total dissolved gas supersaturation in water body and research on influence of total dissolved gas supersaturation on fish - Google Patents
Device for generation of total dissolved gas supersaturation in water body and research on influence of total dissolved gas supersaturation on fish Download PDFInfo
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- CN201479739U CN201479739U CN2009201764572U CN200920176457U CN201479739U CN 201479739 U CN201479739 U CN 201479739U CN 2009201764572 U CN2009201764572 U CN 2009201764572U CN 200920176457 U CN200920176457 U CN 200920176457U CN 201479739 U CN201479739 U CN 201479739U
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Abstract
The utility model relates to an experimental device for generation of total dissolved gas supersaturation in water body and research on influence of total dissolved gas supersaturation on fish, which comprises an autoclave, an air inlet arranged on the autoclave, an adjusting air valve, a safe air valve, a barometre, a water inlet, a water outlet, a water pool provided with a temperature controller, and a water pump, a first ball valve, a first flow meter and a water inlet which are sequentialy connected with the water pool, wherein an air compressor is connected with the air inlet; the water outlet is sequentially connected with a second ball valve, a second flow meter and a water tank; and a total dissolve gas determination apparatus and a water quality monitoring instrument are arranged outside the water tank which is communicated with the water pool through a latex tube. The whole experimental device generates a water body in which the total dissolve gas reaches the supersaturation by closely pressurizing through the autoclave, adopts water circulation, controls the water temperature to be constant and can control the measurement on main physical parameters, such as water temperature, water body pressure, gas-doped amount, flow and the like influencing the generation of the supersaturation of the total dissolve gas so as to quantitatively analyze the generation mechanism of the supersaturation of the total dissolve gas and research the influence of the experimental device on the fishes.
Description
Technical field
The utility model relates to a kind of water body total dissolved gas supersaturation generation technique, be particularly related to a kind of controllable temperature, can be used to simulate high dam and sluice and to cause the oversaturated generation of downstream water body total dissolved gas, and study its experimental provision to the fish influence, belong to the technical field of river construction to eco-environmental impact.
Background technology
Many large hydraulic engineerings sluice in the river course by outlet structure escape works such as spillway, flood discharging tunnels downstream because the comprehensive function of aspects such as its regulated flow, flood control generating needs according to the water regulation demand.Great mass of data shows that high dam sluices and makes dissolved gas such as O in the water body of downstream
2, N
2And CO
2Surpass relative saturation degree under the local atmospheric pressure Deng the gas pressure summation, will form general dissolved gas (total dissolve gas, be called for short TDG) supersaturation, cause aquatile trouble bubble illness such as fish, even cause aquatile mortalities such as fish, thereby the river aquatic ecosystem is caused serious harm.
The oversaturated generation of high dam downstream TDG main with flood discharge flow, flood-discharge energy-dissipating mode and dam under the cushion pool degree of depth etc. all multifactor relevant, belong to the aqueous vapor two phase flow problem of complexity.It relates to field such as water conservancy project hydraulics, gas-liquid interface mass transfer and has extended to the field of ecotope, and its research difficulty is very big.Therefore, at present about water body TDG supersaturation generation and all quite deficient to the mechanism research and the experimental provision of fish influence.
At present, TDG supersaturation problem in the river construction is adopted research meanses such as prototype measurement, physical model experiment, simulating lab test usually.All there be difficulty and restrictive factor in various degree in these research meanses in high dam sluices the research that causes TDG supersaturation problem.Prototype measurement requires the observer must arrive the dam field observation that is sluicing, very inconvenience.And this research means on the one hand in the high dam flood discharge many physical factors such as water flow, flow velocity, air entrainment, downstream pressure, the depth of water and physical condition all exist nonrepeatability or uncontrollability; On the other hand, also will be for guaranteeing the performance of comprehensive benefits such as river construction generating, irrigation, high dam sluicing frequency is less, and the time is short, and this has limited carrying out of Prototype Observation again.Simultaneously owing to flow velocity in the cushion pool under the dam is big, flow field, aeration field change violent, described prototype measurement means still can't be implemented high-acruracy survey to three-dimensional flow field, pressure field and aeration concentrater field in the cushion pool under the dam etc., and it is far from being enough therefore the research of high dam downstream TDG saturation problem only being relied on prototype measurement.
Adopt the main difficulty of TDG supersaturation problem in the little guide physical model experiment research river construction to be that the experimental model yardstick is little, air entrainment is few, to mix factors such as gas pressure-bearing is little, be difficult to produce the TDG supersaturation; Under the dam in the cushion pool complicated physical parameters such as current phenomenon, aeration and general dissolved gas distribution still unresolved in the law of similitude problem of model and actual prototype.And the oversaturated generation of laboratory experiment simulation water body TDG mainly contains at present: (1) mixed hot water utilizes gas dissolubility difference under different water temperatures to produce the TDG supersaturation with cold water; (2) produce the TDG supersaturation by fan blower air-blowing in high water column; (3) change gas solubility by the decompression of bleeding and produce the TDG supersaturation.More than produce the oversaturated mode of TDG or can not control water temperature constant, perhaps can not produce the TDG degree of saturation of variable concentrations simultaneously and make its TDG degree of saturation stable, perhaps too complexity is easy to operate etc. for experimental provision, all has many limitation.Therefore, at above-mentioned not enough this experimental provision of design, to satisfy the needs of laboratory experiment.
For the field study that TDG influences the fish physiological ecological, whether the dead fish that catch in the river reservoir have direct relation with its trouble bubble illness, catch whether suffer from the bubble illness fish representative, suffer from bubble illness fish quantity and whether have problem such as statistical significance and all have dispute.For this reason, need carry out repeated experiments at indoor device by experiment, with the control experiment condition, thereby analysis and research TDG supersaturation is to the fish physiological and Ecological.
Summary of the invention
The purpose of this utility model is the shortcomings and deficiencies that exist in the described prior art, provide a kind of can the simulation to cause water body TDG oversaturated device in downstream when high dam sluices, can realize water temperature, pressure, air entrainment etc. are influenced the Main physical condition of water body supersaturation general dissolved gas generation and the control of factor, and correlation water parameter in the water body measured, and then further study the influence of TDG supersaturation to fish.Can reach by the utility model water body TDG supersaturation is produced and to the quantitative study of fish influence, for protection river aquatic ecological environment, sets up ecological friendly type river construction and have important facilitation.
For realizing the purpose of this utility model, the utility model is to realize by the technical scheme that following measure constitutes.
The supersaturation of the utility model water body total dissolved gas generates and fish is influenced the experimental provision of studying, and according to the utility model, this device comprises autoclave and goes up the air inlet that is provided with, regulates air valve, safety air vavle, air gauge, water inlet and delivery port; The pond, water pump, first ball valve and second ball valve, air compressor machine, the first flow meter and second flowmeter, general dissolved gas analyzer, water quality monitor, temperature controller, the emulsion tube on tank and the outer wall thereof; Described air compressor machine connects air inlet on the autoclave, temperature controller is set in the pond, the pond is connected with pump intake, pump outlet connects first ball valve, first ball valve connects the first flow meter again, the first flow meter is connected to water inlet on the autoclave, autoclave upper water-out mouth connects second ball valve, second ball valve connects second flowmeter, second flowmeter is connected with tank, general dissolved gas analyzer and water quality monitor are arranged on outside the tank, and tank is communicated with the pond by the emulsion tube on its outer wall.
In the technique scheme, the top of described pond and tank is uncovered, and communicates with atmosphere.
In the technique scheme, its drop that is provided with between described pond and tank is not less than 1m.
In the technique scheme, the outer wall of described tank is provided with uniform scale.
In the technique scheme, emulsion tube one end on the described sink outer walls is connected with each scale on the outer wall by aperture, and this emulsion tube other end places uncovered pond to be communicated with.
Characteristics that the utility model compared with prior art has and useful technique effect:
1, adopts cycle water and make water temperature constant in the utility model experimental provision by temperature controller.
2, utilize experimental provision of the present utility model, can conveniently control water body pressure, air entrainment etc. influences the oversaturated a series of key factors of general dissolved gas, can realize the quantitative study to TDG supersaturation problem.
3, utilize experimental provision of the present utility model, degree of saturation scope, flow and the temperature of controlled TDG supersaturation water body are to simulate and to study the influence of TDG supersaturation to fish.
4, utilize experimental provision of the present utility model, can generate the TDG degree of saturation peak that can observe in the prototype measurement, remedied the problem that little guide physical model experiment is difficult to produce the TDG high degree of supersaturation.
5, the utility model experimental provision is compared in the prototype measurement, and not only having solved hurries back and forth carries out the problem of prototype measurement in different power stations; Also solved the problem that high dam sluicing frequency is few, the duration weak point can not repeat long-term measurement.
6, the installation of the utility model experimental provision and measurement are all very convenient; Material requested and equipment investment be little, take up an area of less, cost is low and simple to operate.
Description of drawings
The supersaturation of Fig. 1 the utility model water body total dissolved gas generates and fish is influenced the experimental provision structural representation of research;
Fig. 2 is experimental provision TDG degree of saturation and the pressure graph of a relation under constant air entrainment, constant water flow, steady temperature condition of Fig. 1;
Fig. 3 is two kinds of fish of experimental provision research of adopting Fig. 1 in time tolerance graph of a relation under different TDG degree of saturation.
Among the figure, 1 pond, 2 water pumps, 3 first ball valves, 4 first flow meters, 5 autoclaves, 6 water inlets, 7 air inlets, 8 regulate air valve, 8# safety air vavle, 9 air gauges, 10 delivery ports, 11 air compressor machines, 12 second ball valves, 13 second flowmeters, 14 tanks, 15 emulsion tubes, 16 general dissolved gas analyzers, 17 water quality monitors, 18 temperature controllers.
Embodiment
Below in conjunction with accompanying drawing, and by specific embodiment the utility model is described in further detail, but and do not mean that any qualification to the utility model content.
The supersaturation of the utility model water body total dissolved gas generates and to the experimental provision of fish influence research, its general structure as shown in Figure 1, among Fig. 1, described autoclave 5 is provided with air inlet 7, regulates air valve 8, safety air vavle 8#, air gauge 9, water inlet 6 and delivery port 10; Described air compressor machine 11 communicates and air-blowing in autoclave 5 with air inlet 7 on the autoclave by pipeline, and the big I of air-blowing amount is as required by carrying valve control on the air compressor machine 11; In pond 1, be provided with temperature controller 18, pond 1 is connected with water pump 2 water inlets by pipeline, water pump 2 delivery ports are connected with first ball valve 3, first ball valve, 3 other ends are connected with first flow meter 4, first flow meter 4 is connected with water inlet 6 on the autoclave by pipeline, autoclave upper water-out mouth 10 is connected with second ball valve 12 by pipeline, second ball valve 12 is connected with second flowmeter 13, second flowmeter is connected with tank 14 by pipeline again, general dissolved gas analyzer 16 and water quality monitor 17 are arranged on tank 14 outsides, emulsion tube 15 1 ends on tank 14 its outer walls are connected with each scale on the outer wall by aperture, and the emulsion tube other end places uncovered pond 1.
The utility model experimental provision adopts general dissolved gas analyzer 16 that tank 14 outsides are provided with and water quality monitor 17 can measure water quality parameters such as water body total dissolved gas degree of saturation and DO in the tank 14, water temperature, pH value, turbidity, salinity respectively; And water temperature in the temperature controller 18 control ponds 1 that are provided with in the employing pond, make it constant.
Embodiment 1
The supersaturation of the utility model water body total dissolved gas generates and fish is influenced the used instrument and equipment of experimental provision of research:
1, autoclave 5 is reequiped with sealing autoclave voluntarily by experiment, and it is 0.6Mpa that this autoclave can bear pressure, and it highly is 55cm, and diameter is 40cm; Autoclave is provided with air inlet 7, diameter that diameter is 0.8cm and is 0.8cm, highly is the safety air vavle 8# of 0.5cm, the water inlet 6 that diameter is 1.5cm for the adjusting air valve 8 of 10cm and diameter, diameter is that delivery port 10 and the range of 1.5cm is that 0.6Mpa, precision are the air gauge 9 of 0.02Mpa, and air gauge is the manometer that four directions, Fuyang City instrucment and meter plant produces;
2, air compressor machine 11 is the TA-65 piston type air compressor that Kunshan Jin Cheng mechanical ﹠ electronic equipment corporation, Ltd produces;
3, water pump is the WQ type stainless steel water pump that sky, source, Tianjin pump industry Manufacturing Co., Ltd produces;
4, the first flow meter 4 and second flowmeter 13 are the LZB-15 type glass rotameter that Shanghai silver circulation instrument company produces;
5, general dissolved gas analyzer 16 is the TDG analyzer of U.S. YSI Inc. production;
6, water quality monitor 17 is water temperature, the multi-parameter water-quality analyzer of the production of U.S. YSI Inc.;
7, temperature controller 18 is the bowl dragon humidostat that moral million instrument and meter Co., Ltds in Shanghai produce;
8, pond 1 volume settings is 1000L.
The utility model experimental provision simulation high dam causes the oversaturated principle of water body total dissolved gas to be when sluicing: a large amount of gases are dissolved in the water, form the general dissolved gas supersaturation.So under the constant condition of water temperature, flow and air entrainment, the general dissolved gas degree of saturation is directly proportional with pressure.Promptly, just can generate the general dissolved gas supersaturation water body of corresponding degree of saturation by increasing or reducing pressure in the autoclave.
It is as follows that the water body total dissolved gas supersaturation generates experimental procedure and operating condition and operating process:
1, connects each parts according to layout shown in Figure 1;
2, in pond 1, fill running water and abundant aeration 24h;
3, by temperature controller 18 control and constant experiment water temperature at 25 ℃;
4, open air compressor machine 11, open water pump 2 simultaneously, air and water are entered in the autoclave 5 by water inlet on air inlet on the autoclave and the autoclave respectively, the flow of water is controlled to be 4L/min by first ball valve 3, and air entrainment is controlled at 0.05m by carrying valve on the air compressor machine
3/ min;
5, for safety, pressure is no more than 0.2Mpa in the air valve 8 control autoclaves by regulating;
6, the water body after autoclave 5 inflation pressurization is flowed in the tanks 14 by autoclave upper water-out mouth 10, and have a large amount of micro-bubbles in the visible tank water body this moment, when pressure in the autoclave during greater than 0.1Mpa, and visible water atomization phenomenon in the tank water body;
7,0.4m scale place emulsion tube 15 on opening sink water 14 outer walls places uncovered pond 1 with the emulsion tube other end, closes other scale place emulsion tubes 15, to control the tank middle water level in 0.4m;
8, will be arranged on the general dissolved gas analyzer 16 of tank 14 outsides and the probe of water quality monitor 17, put into tank, to measure water quality parameters such as water body TDG intensity value and DO, water temperature, pH value, turbidity, salinity;
9, be higher or lower than the required intensity value of experiment as TDG degree of saturation measured value, this experiment is decided to be 130%, 125%, 115%, then reduces by autoclave adjusted air valve 8 or increases in the autoclave pressure to obtain required intensity value;
When 10, treating in the tank that water body TDG degree of saturation is stable at the required numerical value of experiment, to test fish and put into tank, the observation fish are subjected to the survival condition the TDG effect of saturation degree under and write down water quality parameters such as DO, water temperature, pH value, turbidity, salinity, and tank experiment fish is dead to stop to test after half up to putting into.
Shown in table 1-table 5, table 1 is that water temperature is that 25 ℃, flow are that 4L/min, air entrainment are 0.05m by embodiment 1 gained experimental data
3The relation of/min general dissolved gas degree of saturation and pressure.Table 2 is the experimental datas of the experiment fish being carried out different TDG supersaturation tolerances in tank 14.Table 3-table 5 is respectively that the TDG degree of saturation is 130%, 125%, 115% o'clock, puts into water quality parameter values such as tank water body DO behind the experiment fish, water temperature, pH value, turbidity, salinity.
Table 1
| Absolute pressure (Mpa) | Degree of saturation (100%) |
| 0.16 | 148 |
| 0.13 | 139 |
| 0.10 | 134 |
| Absolute pressure (Mpa) | Degree of saturation (100%) |
| 0.075 | 130 |
| 0.05 | 125 |
| 0.012 | 115 |
Table 2
| TDG degree of saturation (100%) | Experiment fingerling A quantity (tail) | The experiment fingerling A half death time | Experiment fingerling B quantity (tail) | The experiment fingerling B |
| 130 | 24 | 390min | 24 | 355min |
| 125 | 24 | 935min | 24 | 895min |
| 115 | 24 | Do not occur dead | 24 | Do not occur dead |
Table 3
| Time (h) | DO (mg/L) | pH | ℃ | TDS (NTU) | Sal (ppt) | NH 4 + (mg/L) | NO 3 - (mg/L) |
| 2 | 9.86 | 6.80 | 24.6 | 0.043 | 0.03 | 0.018 | 0.003 |
| 4 | 9.85 | 6.81 | 24.6 | 0.043 | 0.03 | 0.018 | 0.003 |
| 6 | 9.84 | 6.82 | 24.7 | 0.046 | 0.03 | 0.018 | 0.003 |
| 8 | 9.82 | 6.81 | 24.9 | 0.047 | 0.03 | 0.018 | 0.004 |
Table 4
| Time (h) | DO (mg/L) | pH | ℃ | TDS (NTU) | Sal (ppt) | NH 4 + (mg/L) | NO 3 - (mg/L) |
| 2 | 9.81 | 6.81 | 24.3 | 0.043 | 0.03 | 0.018 | 0.003 |
| 4 | 9.80 | 6.80 | 24.4 | 0.043 | 0.03 | 0.018 | 0.003 |
| Time (h) | DO (mg/L) | pH | ℃ | TDS (NTU) | Sal (ppt) | NH 4 + (mg/L) | NO 3 - (mg/L) |
| 6 | 9.80 | 6.81 | 24.4 | 0.045 | 0.03 | 0.019 | 0.003 |
| 8 | 9.79 | 6.81 | 24.6 | 0.047 | 0.04 | 0.018 | 0.004 |
| 10 | 9.78 | 6.82 | 24.5 | 0.046 | 0.03 | 0.019 | 0.004 |
| 12 | 9.79 | 6.83 | 24.6 | 0.047 | 0.04 | 0.018 | 0.003 |
| 14 | 9.77 | 6.82 | 24.7 | 0.048 | 0.03 | 0.020 | 0.003 |
| 16 | 9.77 | 6.83 | 24.8 | 0.046 | 0.03 | 0.018 | 0.004 |
Table 5
| Time (h) | DO (mg/L) | pH | ℃ | TDS (NTU) | Sal (ppt) | NH 4 + (mg/L) | NO 3 - (mg/L) |
| 2 | 8.81 | 6.81 | 24.5 | 0.043 | 0.03 | 0.018 | 0.003 |
| 4 | 8.80 | 6.80 | 24.6 | 0.044 | 0.03 | 0.018 | 0.003 |
| 6 | 8.80 | 6.82 | 24.4 | 0.046 | 0.03 | 0.018 | 0.003 |
| 8 | 8.79 | 6.81 | 24.6 | 0.047 | 0.03 | 0.018 | 0.003 |
| 10 | 8.78 | 6.82 | 24.7 | 0.047 | 0.03 | 0.018 | 0.003 |
| 14 | 8.79 | 6.83 | 24.6 | 0.047 | 0.03 | 0.019 | 0.003 |
| 18 | 8.77 | 6.82 | 24.5 | 0.047 | 0.04 | 0.018 | 0.003 |
| 24 | 8.77 | 6.81 | 24.7 | 0.046 | 0.04 | 0.019 | 0.004 |
| 32 | 8.76 | 6.82 | 24.6 | 0.047 | 0.004 | 0.019 | 0.003 |
Experimental result shows, under the constant condition of water temperature, flow and air entrainment, the general dissolved gas degree of saturation is directly proportional with pressure and the TDG degree of saturation can be stablized under the control of corresponding pressure for a long time; Water temperature is also more constant, has avoided because variations in temperature makes gas solubility change the variation that causes the TDG degree of saturation; Variations in temperature also can influence the metabolic speed of fish, makes fish different physiological signs occur under different temperatures, thereby disturbs the research of the single factor of influence of TDG supersaturation to fish.At experimentation, two kinds of experiment fish are because its kind difference to the oversaturated tolerance of TDG difference to some extent, but all shows the common phenomenon that the time-to-live shortens with the rising of TDG degree of saturation.When degree of saturation reached 130%, death had all just appearred in the experiment fish in several hours, and this experimental phenomena also obtains the identical experiment result through repeated experiments.Because each water quality parameter does not have bigger variation under each degree of saturation condition, the death of deducibility experiment fish causes owing to the TDG supersaturation damages it in view of the above.
To sum up, proportional relation according to experiment gained general dissolved gas degree of supersaturation and pressure, in actual engineering, can by the water conservancy diversion bank is set, measure such as the flow that reduces to sluice, reduce the depth of water under the dam as far as possible, reduce the current hydrostatic pressure, to reduce air entrainment, to reach to reduce the purpose of general dissolved gas degree of saturation under the dam.By the tolerance of researching fish to the general dissolved gas degree of saturation, can be for formulating the TDG degree of saturation upper limit in the quality standard of water environment, accurately estimating the high dam engineering and provide theoretical foundation to the aquatic ecotope of influence and protection downstream of aquatic ecosystem.
Claims (4)
1. a controllable temperature water body total dissolved gas supersaturation generates and to the experimental provision of fish influence research, it is characterized in that comprising autoclave (5) and go up the air inlet (7) that is provided with, regulate air valve (8), safety air vavle (8#), air gauge (9), water inlet (6) and delivery port (10); Pond (1), water pump (2), first ball valve (3) and second ball valve (12), air compressor machine (11), first flow meter (4) and second flowmeter (13), general dissolved gas analyzer (16), water quality monitor (17), temperature controller (18), the emulsion tube (15) on tank (14) and the outer wall thereof; Described air compressor machine connects air inlet on the autoclave, temperature controller is set in the pond, the pond is connected with pump intake, pump outlet connects first ball valve, first ball valve connects the first flow meter again, the first flow meter is connected to water inlet on the autoclave, autoclave upper water-out mouth connects second ball valve, second ball valve connects second flowmeter, second flowmeter is connected with tank, general dissolved gas analyzer and water quality monitor are arranged on outside the tank, and tank is communicated with the pond by the emulsion tube on its outer wall.
2. experimental provision according to claim 1, the top that it is characterized in that described pond (1) and tank (14) is uncovered, and communicates with atmosphere.
3. experimental provision according to claim 1 and 2 is characterized in that its drop that is provided with between described pond (1) and tank (14) is not less than 1m.
4 experimental provisions according to claim 1 and 2 is characterized in that the outer wall of described tank (14) is provided with uniform scale.
5. according to claim 1 or 4 described experimental provisions, it is characterized in that emulsion tube (15) one ends on described tank (14) outer wall are connected with each scale on the outer wall by aperture, emulsion tube (15) other end places uncovered pond (1).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642071B (en) * | 2009-08-31 | 2011-07-20 | 四川大学 | Water body total dissolved gas supersaturation generation and device for studying influence thereof on fish |
| CN102626058A (en) * | 2012-04-17 | 2012-08-08 | 戴会超 | Method for experimenting dissolved oxygen saturation threshold of damaging fishes |
| CN109287531A (en) * | 2018-11-30 | 2019-02-01 | 四川大学 | A kind of lower fish of measurement dissolved gas supersaturation stress avoid the experimental method of ability using tributary |
| CN109287532A (en) * | 2018-11-30 | 2019-02-01 | 四川大学 | A kind of measurement flow velocity acts on the experimental method of lower fish avoidance dissolved gas supersaturation water ability of immigrants |
| CN111264450A (en) * | 2020-03-30 | 2020-06-12 | 四川大学 | Fish exploration and vertical supersaturation avoidance TDG behavior research method and device under flowing water condition |
-
2009
- 2009-08-31 CN CN2009201764572U patent/CN201479739U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101642071B (en) * | 2009-08-31 | 2011-07-20 | 四川大学 | Water body total dissolved gas supersaturation generation and device for studying influence thereof on fish |
| CN102626058A (en) * | 2012-04-17 | 2012-08-08 | 戴会超 | Method for experimenting dissolved oxygen saturation threshold of damaging fishes |
| CN109287531A (en) * | 2018-11-30 | 2019-02-01 | 四川大学 | A kind of lower fish of measurement dissolved gas supersaturation stress avoid the experimental method of ability using tributary |
| CN109287532A (en) * | 2018-11-30 | 2019-02-01 | 四川大学 | A kind of measurement flow velocity acts on the experimental method of lower fish avoidance dissolved gas supersaturation water ability of immigrants |
| CN111264450A (en) * | 2020-03-30 | 2020-06-12 | 四川大学 | Fish exploration and vertical supersaturation avoidance TDG behavior research method and device under flowing water condition |
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