Experimental device for simulating carbon dioxide flux of lakes and reservoirs

Abstract

The utility model discloses an experimental device for simulating carbon dioxide flux of lakes and reservoirs, which is characterized in that a culture container is arranged on a base, and a culture water body is filled in the culture container; a substrate is laid at the bottom of the culture container, aquatic plants are planted in the substrate, a water inlet and an air inlet are formed in the upper portion and the lower portion of the left side of the culture container respectively, and a water outlet and an air outlet are formed in the upper portion and the lower portion of the right side of the culture container respectively. A probe of the carbon dioxide concentration real-time monitor is also respectively placed in the air and the culture water body of the culture container; a top cover is arranged at the top of the culture container; a controllable light source is mounted below the top cover. The device can realize a tracking monitoring simulation experiment on the carbon dioxide flux of the lake and reservoir water body, can set different working conditions such as temperature, illumination, gas concentration, aquatic plant, water body exchange times and the like, and is beneficial to calculation of the carbon dioxide flux.

Description

TECHNICAL FIELD

[0001] The utility model belongs to carbon flux experimental device, concretely relates to a kind of experimental device of simulating lake carbon dioxide flux. BACKGROUND

[0002] Lake water carbon dioxide flux is usually monitored by gas analyzer and collected water sample in situ observation work, but natural water carbon flux is susceptible to plant distribution, temperature and other influences and appears spatial and temporal non-uniform variation, and traditional in situ observation method is difficult to realize flux tracking monitoring in overall range, therefore cannot accurately measure lake water carbon dioxide flux.In addition, many cities are trying to achieve the purpose of improving lake water quality and reconstructing aquatic ecosystem by planting underwater plants, accelerating water flow and other measures, but cannot grasp the future change of reconstructed lake carbon dioxide flux during implementation process, and it is difficult to fit into the current double carbon emission reduction target.Therefore, there is an urgent need for a new type of experimental device for simulating lake carbon dioxide flux to solve the above problems. UTILITY MODEL CONTENT

[0003] Utility model purpose: in view of the problems existing in prior art, the utility model provides a kind of experimental device for simulating lake carbon dioxide flux.The experimental device includes but is not limited to the advantages such as small size, no limit experimental scene, etc.;At the same time, it can meet the real-time monitoring of air and water carbon dioxide;Temperature control rod is provided in the device, which can meet the discussion of carbon dioxide flux state under different temperature conditions.In addition, different concentrations of carbon dioxide concentration and other gases are introduced during the experiment, which can achieve the state of dynamic balance of air carbon dioxide concentration in the device, and realize the experimental demand of different gas concentration conditions, and it is easy to collect water sample test and replace aquatic plant operation, to achieve the purpose of studying the influence of planting different aquatic plants on carbon dioxide flux.

[0004] Technical solution: In order to achieve the above object, the utility model relates to an experimental device for simulating lake and reservoir carbon dioxide flux, which comprises a culture container and a carbon dioxide concentration real-time monitor, the culture container is arranged on the base, the culture container is internally provided with culture water and laid base; the culture container left side upper and lower two places each are provided with water inlet and air inlet, right side upper and lower two places each are provided with water outlet and air outlet, the temperature control stick connected with external power supply is put into the culture water through the outlet hole, the probe of the carbon dioxide concentration real-time monitor also is put into the air and culture water of culture container respectively, the culture container top is equipped with the top cover, and the controllable light source is installed below the top cover. The material of the culture container is transparent organic glass, and the water inlet, water outlet, air inlet and air outlet are provided with switches. The carbon dioxide concentration real-time monitor can carry out real-time monitoring and record to the carbon dioxide concentration of air and water body simultaneously. The top cover and controllable light source are connected through buckle, which is used for dismounting and replacing. Mainly include base, experimental container, aquatic plant, temperature control stick, light source, air and water body carbon dioxide concentration real-time monitoring probe. The experimental container is placed above the base, the base is laid in the container, and the aquatic plant is planted, and the water body is introduced from the water inlet arranged on the left side of the container; the water temperature is set through the temperature control stick, and the light and dark ratio is adjusted; the water flow (exchange frequency) is changed by controlling the ratio of water inlet and water outlet; the value is recorded through the monitoring probe during the experiment and is used for subsequent flux conversion; the top cover is arranged on the upper end of the experimental container, and the cover is provided with a sealing rubber ring to achieve the purpose of container sealing.

[0005] Preferably, the base is made of wood board, which can safely bear the experimental device.

[0006] Preferably, the material of the experimental container is transparent organic glass, and the base and plant culture state in the container can be observed; the container is provided with water inlet hole, water outlet hole, air inlet hole, air outlet hole, temperature control stick outlet hole and carbon dioxide probe outlet hole; the sealing ring is arranged around the outlet hole to achieve the purpose of container sealing, and the power cord and signal line pass through the outlet hole to connect the real-time recorder and indoor power supply; the container upper end is provided with a cover.

[0007] Preferably, the base is the nutrient soil or lake and reservoir sediment with known soil carbon concentration.

[0008] Preferably, the aquatic plant is the plant after the initial water body is washed, and the lake and reservoir own plant or the plant to be planted in the future can be selected.

[0009] Preferably, the water inlet hole and water outlet hole are distributed to the two sides of the container, and the end outside the container is provided with a switch; the air inlet hole and air outlet hole are both distributed to the upper side of the water hole, and the end outside the container is also provided with a switch.

[0010] Preferably, the temperature control rod is a waterproof heat pipe with refrigeration and heating, the temperature control range is 5-35 DEG C, the power supply line is connected with indoor power supply through the outlet hole, and the effect of constant temperature control is realized.

[0011] Preferably, the carbon dioxide real-time monitor is connected with two probes, is respectively air carbon dioxide concentration monitoring probe and water carbon dioxide concentration monitoring probe, and the measurement range is 0-10000ppm;The probe is placed in the container, the power supply and the signal line are connected with the data recorder and the display screen through the outlet hole, the carbon dioxide concentration recording frequency of minute, hour or day can be realized, the purpose of real-time monitoring and recording is achieved;The display screen synchronously displays the carbon dioxide concentrations of air and water, and is used for intuitively observing the experimental numerical value change in the container.

[0012] Preferably, the top cover is also composed of transparent organic glass, the shape is box cover, and the length and width are slightly larger than the size of the container by about 1cm;A rubber sealing ring is pasted in the cover.

[0013] Wherein, the top cover is provided with stepless adjustment visible light source, the light source is connected with the top cover through buckle, adopts 220V indoor power supply, and the light intensity range is 500-8000lx.

[0014] Wherein, the top cover is provided with outlet hole in a corner, and the power line of the visible light source in the inside is connected with the timing switch and indoor power supply through the outlet hole, so that automatic switching is realized.

[0015] Working principle: the utility model discloses a base, the transparent organic glass made experimental container, substrate, aquatic plants, temperature control rod, carbon dioxide real-time monitoring probe, light source, inlet and outlet water and inlet and outlet air are set up, utilize the mutual cooperation between them, thereby can realize the tracking monitoring of lake and reservoir water body carbon dioxide flux, and set up different temperature, illumination, gas concentration, aquatic plants, water body exchange frequency etc.

[0016] Three groups (parallel experiments) of the experimental containers for simulating the carbon dioxide flux of the lake and reservoir are placed in the laboratory, and after the initial experimental water body is used to flush the containers, the containers are fixed on the base; 3-5 cm of the lake and reservoir sediment with a known concentration is laid on the bottom of each container, and aquatic plants are planted according to the needs; the initial experimental water is poured into each device through the water inlet as the culture solution; after the temperature is controlled and adjusted according to the needs, the temperature control rod is connected to the water body; the carbon dioxide concentration probe is calibrated, and after the concentration data recorder and real-time display screen are installed, the two probes are placed in the air and water in the container respectively; the light device is set as the light-dark ratio, and the long-term flux experiment is started. During the experiment, different water exchange conditions can be set by opening and closing the water inlet and outlet; in addition, the air carbon dioxide concentration rising condition in the future scenario can be set by opening and closing the air inlet and outlet. In addition, the top cover can be opened to collect water samples in the container for analysis of other indicators.

[0017] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0018] Compared with the use of gas analysis for single-point flux monitoring in the in-situ observation work of the conventional method, due to the uneven spatial distribution of aquatic plants in the lake and reservoir and the mutual matching of different types; in addition, the in-situ observation work is mostly monitoring of the water body at fixed time points, and it is difficult to consider tracking monitoring under different temperature changes; the experimental device can realize real-time monitoring of the carbon dioxide flux during the cultivation of aquatic plants, the connection of the cultivation container, the planting of aquatic plants and the carbon dioxide concentration probe, the molding of the aquatic plant conditions in different regions of the lake and reservoir, and the sampling of the water sample from the top cover, the water body can be supplemented or accelerated from the water inlet, and the lake and reservoir hydrodynamic conditions under natural conditions are molded; the spatiotemporal variation of the carbon dioxide concentration of the lake and reservoir water body is monitored in the laboratory, and then the carbon dioxide flux of the whole lake and reservoir is calculated.

[0019] Compared with the use of conical flasks or beakers to cultivate aquatic plants in the light incubator of the conventional method, due to the fact that only water flow can be generated by shaking in the conical flask; the carbon dioxide concentrations of the air and water in the conical flask and beaker devices need to be determined by opening the air permeable film, bottle plug and other sealing devices. The experimental device can realize unified control of functions such as light, temperature, water flow and real-time monitoring of carbon dioxide during the cultivation of aquatic plants in the lake and reservoir; through the external controller of the light source, the light intensity can be constant or simulate day and night changes during the experiment, different concentrations of air gas can be input to realize the setting of future scenarios, and the water flow can be kept constant during the experiment to achieve a dynamic balance similar to the reservoir; a single control environment variable is realized to explore the influence on the dynamic carbon dioxide flux of the lake and reservoir water body. In addition, the experimental device can set the size of the limited experimental space according to the needs, and the device structure is simple and practical. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit the utility model.

[0021] Figure 1 This is a schematic diagram of the combined structure of the simulated carbon dioxide flux device of this utility model;

[0022] Figure 2 This is a schematic diagram of the split structure of the simulated carbon dioxide flux device of this utility model;

[0023] Figure 3 This is a schematic diagram illustrating the changes in carbon dioxide concentration in the air and water inside the container under specific operating conditions in this embodiment.

[0024] In the picture:

[0025] 1-Base, 2-Cultivation container, 3-Cultivation water, 4-Base, 5-Aquatic plants, 6-Water inlet, 7-Water outlet, 8-Air inlet, 9-Air outlet, 10-Temperature control rod, 11-Real-time carbon dioxide concentration monitor, 12-Top cover, 13-Controllable light source. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "comprising" or "including," and similar words used in this disclosure, mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, but does not exclude other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1As shown, the new device needs to be assembled before the experiment, usually 1 - base, 2 - culture container, 3 - culture water, 4 - substrate, 5 - aquatic plants, 6 - water inlet, 7 - water outlet, 8 - air inlet, 9 - air outlet, 10 - temperature control rod, 11 - real-time carbon dioxide concentration monitor is integrated, 12 - top cover, 13 - controllable light source is integrated. 2 - culture container is placed above 1 - base, 4 - substrate needs to be added to 2 - culture container first, the amount of 4 - substrate added is to pave the bottom of the container, the thickness is about 3-5 cm, or the thickness can be determined according to the roots of the planted plants. 5 - aquatic plants are planted in 4 - substrate, 3 - culture water is added through 6 - water inlet, 7 - water outlet is in closed state at this time, the volume of 3 - culture water added is usually determined by the volume of the sample to be taken during the whole experiment, the total volume of the sample taken during the whole experiment does not exceed 5% of the total liquid. 6 - water inlet, 7 - water outlet, 8 - air inlet and 9 - air outlet are all connected by glass glue after the holes of 2 - culture container are opened and cannot be detached, 8 - air inlet and 9 - air outlet remain closed during the assembly of the experimental device. 10 - temperature control rod is placed into the water body, the power cord is connected to the indoor power supply to realize the temperature control requirement; the data recorder and real-time display of 11 - real-time carbon dioxide concentration monitor are pasted on the outer wall of the container, the air probe is placed in the air in the container, and the water probe is placed in the middle position of the water body in the container. 12 - top cover and 13 - controllable light source are connected using buckles, or 13 - controllable light source can be replaced according to the light intensity requirement to meet the requirements of different experiments.

[0029] The use process of the embodiment of the new device is as follows: first, 4 - substrate is laid on the bottom of 2 - culture container placed above 1 - base, the laying thickness is 5 cm; the experimental requirement is Hydrilla verticillata, 5 - aquatic plants (Hydrilla verticillata) are evenly planted in 4 - substrate, the planting density is 45 plants / m 2 ; the volume of the container in this embodiment is 300 L, about 100 L of shallow lake raw water is poured into 6 - water inlet, the water body has been filtered and the initial carbon dioxide concentration has been measured before pouring, 4 - substrate is the same, 7 - water outlet remains closed during pouring. The temperature is set to 25℃, the light intensity is set to 6000lx when there is light (the light and temperature settings can be replaced according to the experimental requirements), the light and dark ratio is adjusted to 12:12h, after the carbon dioxide monitoring recorder is calibrated, it is set to measure a value every 20s, and a value is recorded and saved every 10min; all devices are placed in the culture container, the external 220V power supply is connected, after the water temperature of the culture water remains basically constant, 6 - water inlet and 7 - water outlet are opened, the water exchange frequency in the container is kept for 10 days, and then a long-term carbon dioxide flux experiment is started. Figure 3 As shown, the new device realizes the simulation experiment of carbon dioxide flux of lake and reservoir dominated by Hydrilla verticillata.

[0030] The above merely describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, some modifications and improvements can be made, and these all belong to the protection scope of the present application.

Claims

1. An experimental device for simulating carbon dioxide flux of a lake reservoir, characterized in that, The culture container (2) is provided on the base (1), and the culture container (2) is internally provided with a culture water body (3) and a substrate (4) laid therein. The substrate (4) is laid at the bottom of the culture container (2), and the aquatic plant (5) is planted in the substrate (4); the water inlet (6) and the air inlet (8) are respectively arranged at the upper and lower parts of the left side of the culture container (2); the water outlet (7) and the air outlet (9) are respectively arranged at the upper and lower parts of the right side of the culture container (2); the temperature control rod (10) connected with an external power supply is placed into the culture water body (3) through the outlet hole; the probes of the carbon dioxide concentration real-time monitoring instrument (11) are respectively placed into the air and the culture water body (3) of the culture container (2); the top cover (12) is arranged at the top of the culture container (2), and the controllable light source (13) is arranged below the top cover (12).

2. The experimental device for simulating carbon dioxide flux of a lake or reservoir according to claim 1, characterized in that, The material of the culture container (2) is transparent organic glass, and the water inlet (6), the water outlet (7), the air inlet (8) and the air outlet (9) are provided with switches.

3. The experimental device for simulating carbon dioxide flux of a lake or reservoir according to claim 1, characterized in that, The carbon dioxide concentration real-time monitoring instrument (11) can synchronously monitor and record the carbon dioxide concentrations of the air and the water body in real time.

4. The experimental device for simulating carbon dioxide flux of a lake or reservoir according to claim 1, characterized in that, The top cover (12) and the controllable light source (13) are connected through buckling, and are used for dismounting and replacing.

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