Indoor evaporation salt deposition tester for unsaturated saline soil

Abstract

The utility model relates to an indoor evaporation salt deposition tester for unsaturated saline soil. The tester comprises a programmable constant-temperature test box, a Markov bottle, a data collector, a computer, an organic glass tank, a porous plate, a water storage chamber, an automatic weighing platform, a heat insulation film, a plurality of temperature sensors, a plurality of soil water and salt sensors, a top plate and an infrared thermal imager, wherein the Markov bottle, the data collector and the computer are arranged outside the programmable constant-temperature test box, and the organic glass tank, the porous plate, the water storage chamber, the automatic weighing platform, the heat insulation film, the temperature sensors, the soil water and salt sensors are arranged inside the programmable constant-temperature test box. A halogen lamp and a digital camera. The Markov bottle is communicated with the water storage chamber through an organic glass tube; all the sensors and the automatic weighing platform are connected with a computer through a data acquisition line via a data acquisition unit. The device can monitor the changes of temperature, moisture and salt in the salinized soil in real time in the evaporation process, can monitor the moisture evaporation capacity and salt crystallization aggregation characteristics in the salinized soil, and can adjust the evaporation intensity and the evaporation temperature in the evaporation process and the moisture supply condition in the salinized soil.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation tests for saline soil, in particular to an indoor evaporation and salt accumulation tester for unsaturated saline soil. Background Art

[0002] Saline soil is widely distributed in the cold and arid regions of northwest China. Affected by the external environment, complex coupling reactions will occur in the moisture field, salt field and temperature field inside the saline soil, resulting in salt expansion, frost heaving and thaw settlement diseases of the saline soil, bringing a series of problems to the construction of infrastructure and its disease prevention and control in saline soil areas. Therefore, it is of great significance to clarify the influence of salt content, evaporation intensity and water supply conditions on evaporation characteristics and the change laws of water and salt.

[0003] Soil salinization is a process in which salts in the underlying soil or groundwater rise to the surface along the capillary, and the salts accumulate in the surface soil after the water evaporates. This process not only harms soil biodiversity, crop productivity, etc., but also leads to a decline in soil quality and a reduction in the utilization rate of agricultural resources. Under the action of evaporation, the salts in the soil continuously rise with the movement of water and accumulate on the soil surface. The continuous accumulation of surface salts increases the surface salt concentration, exacerbating soil drought and salt damage. Therefore, it is of great significance to explore the change laws of water and salt in saline soil under the action of evaporation. At present, conducting indoor evaporation tests on saline soil is a common method for studying the change laws of temperature, water and salt in saline soil under the action of evaporation. However, most of the current research only monitors the changes in temperature, water and salt in saline soil, ignoring the monitoring of salt crystal aggregation and the determination of the water evaporation amount in saline soil during the evaporation process, and not considering the influence of groundwater recharge methods on the change laws of water and salt. In fact, salts will crystallize due to the reduction of water evaporation, and the crystallized salts will affect the changes of water and salt in saline soil; due to different groundwater levels, the water sources in saline soil under the action of evaporation include direct recharge of groundwater, recharge of water vapor, and there may be no water recharge due to deep groundwater levels.

[0004] Therefore, it is very urgent to develop a test instrument that can monitor the changes in temperature, water and salt in saline soil during the evaporation process in real time, can also monitor the water evaporation amount and salt crystal aggregation characteristics in saline soil, and can also adjust the water recharge source in saline soil during the evaporation process. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide an indoor evaporation and salt accumulation tester for unsaturated saline soil that can not only monitor the changes in temperature, water and salt in saline soil during the evaporation process in real time, but also monitor the water evaporation amount and salt crystal aggregation characteristics in saline soil, and can also adjust the water recharge source in saline soil during the evaporation process, with simple operation, intuitive results and accurate test data.

[0006] To solve the above problems, a non-saturated saline soil indoor evaporation and salt accumulation tester of the present utility model is characterized in that: the tester includes a programmable constant temperature test chamber, a Mariotte bottle placed outside the programmable constant temperature test chamber, a data collector, a computer, and an organic glass tank, a porous plate, a water storage chamber, an automatic weighing platform, a heat insulation film, several temperature sensors, several soil water and salt sensors, a top plate, an infrared thermal imager, a halogen lamp, and a digital camera placed inside the programmable constant temperature test chamber; the bottom of the Mariotte bottle is provided with an organic glass tube, and the organic glass tube passes through the programmable constant temperature test chamber and is connected to the water storage chamber; the top of the organic glass tank is provided with the top plate, and the bottom is provided with the water storage chamber, and both sides of the base of the water storage chamber are provided with support rods; the support rods are placed on the automatic weighing platform; the outer wall of the organic glass tank is wrapped with the heat insulation film, and several temperature sensors and several soil water and salt sensors are arranged inside; the digital camera is arranged obliquely above the organic glass tank, and the halogen lamp is arranged directly above, and the infrared thermal imager flush with the top surface of the organic glass tank is arranged on the side of the organic glass tank; the porous plate is clamped into the water storage chamber, and a layer of filter paper is covered on the porous plate; O-ring seals are provided on the organic glass tank, the water storage chamber, and the top plate; several temperature sensors, the soil water and salt sensors, and the automatic weighing platform are all connected to the computer through data acquisition lines via the data collector.

[0007] The top surface of the organic glass tank is open, and O-ring grooves I for installing the O-ring seals are respectively embedded in the midlines of the top and bottom end faces thereof.

[0008] The embedding width and depth of the O-ring groove I are both 2 mm.

[0009] The number of the O-ring seals is 2, the inner diameter is half of the inner diameter of the organic glass tank plus its thickness, and the wire diameter is 3 mm.

[0010] Installation holes I for the temperature sensors and installation holes II for the soil water and salt sensors are reserved on the tank wall of the organic glass tank; the temperature sensors and the soil water and salt sensors are installed inside the saline soil sample in the organic glass tank through the installation holes I and the installation holes II.

[0011] Several threaded holes I are evenly distributed on the edge of the top plate; several threaded holes II are evenly distributed on the outer extending flange of the water storage chamber, and the positions and sizes of the threaded holes II are the same as those of the threaded holes I; the top plate and the water storage chamber are connected together by detachable bolts through the threaded holes I and the threaded holes II.

[0012] The top plate is a stainless - steel annular disc, and the inner diameter of the disc is equal to the inner diameter of the plexiglass tank; on the bottom end face of the top plate, there is an O - ring groove II for embedding the O - ring, and the size, embedding width, and depth of this O - ring groove II are the same as those of the O - ring groove I.

[0013] On the top end face of the water storage chamber, there is an O - ring groove III for embedding the O - ring, and the size, embedding width, and depth of this O - ring groove III are the same as those of the O - ring groove I; on the base of the water storage chamber, a drain valve is reserved.

[0014] On the porous plate, several tiny holes are evenly distributed, and it is provided with flanges. The flanges are embedded in the corresponding grooves of the water storage chamber, and the shape of the grooves matches that of the flanges; the diameter of the porous plate is equal to the inner diameter of the plexiglass tank, and the thickness is 0.5 - 1 cm.

[0015] The utility model has the following advantages compared with the prior art:

[0016] 1. Different water replenishment modes of the soil sample during the evaporation process can be realized.

[0017] In the utility model, the Mariotte bottle is used as the water replenishment device for the water storage chamber, which can simulate the water replenishment situation during the evaporation of the soil sample. When adjusting the water level line in the Mariotte bottle so that the water surface in the water storage chamber contacts the saline soil sample at the bottom of the plexiglass tank, it simulates the situation where the moisture at the bottom of the soil body is replenished in the form of groundwater; when adjusting the water level line in the Mariotte bottle so that the water surface in the water storage chamber does not contact the saline soil sample at the bottom of the plexiglass tank, it simulates the situation where the moisture at the bottom of the soil body is replenished in the form of water vapor; when no water is added to the Mariotte bottle and there is no moisture in the water storage chamber, it simulates the situation where there is no groundwater replenishment at the bottom of the soil body.

[0018] 2. Evaporation tests under different evaporation intensities and different temperature conditions can be realized.

[0019] In the utility model, the halogen lamp is installed above the surface of the saline soil sample. By adjusting its installation height, the change in the radiation intensity on the surface of the saline soil sample can be realized. At the same time, by adjusting the temperature inside the programmable constant - temperature test chamber, the change in the evaporation temperature of the saline soil sample can be realized.

[0020] 3. Dynamic monitoring of the evaporation intensity of the soil sample can be realized.

[0021] In the utility model, the amount of water replenished into the soil sample can be determined by observing the change in the water level surface in the Mariotte bottle during the evaporation process, and the change in the moisture content in the soil sample during the evaporation process can be determined by monitoring the reading of the automatic weighing platform. By comprehensively considering the change in the water level surface of the Mariotte bottle and the change in the reading of the automatic weighing platform during the evaporation process, the evaporation intensity of the soil sample during the evaporation process can be obtained.

[0022] 4. It can realize the dynamic monitoring of the crystallization and salt accumulation situation and salt accumulation thickness on the surface of the soil sample.

[0023] The digital camera in the present utility model can take pictures of the crystallization and salt accumulation situation on the surface of the soil sample in real time. At the same time, since the heat conduction coefficients and specific heat capacities of the salt accumulation layer and the soil sample are different, they will show different temperatures under evaporation conditions. The infrared thermal imager in the present utility model can determine the thickness of the salt accumulation layer through the difference in the infrared distribution between the salt accumulation layer and the soil sample.

[0024] 5. It can realize the automatic collection and recording of data such as the temperature, moisture, and salt content of the soil sample, as well as the evaporation intensity of the soil sample, the crystallization and salt accumulation situation on the surface of the soil sample, and the salt accumulation thickness during the evaporation process.

[0025] The temperature sensor, soil water and salt sensor, automatic weighing platform, etc. in the present utility model are connected to the data collector through data acquisition lines, and the measured data can be stored and recorded in real time. At the same time, the digital camera and the infrared thermal imager also have the functions of automatic photographing and automatic data storage.

[0026] In summary, the present utility model can monitor the changes in temperature, moisture, and salt content in saline soil during the evaporation process in real time, and can also monitor the water evaporation amount and salt crystallization and accumulation characteristics in saline soil. It can also adjust the evaporation intensity and evaporation temperature during the evaporation process and the water supply situation in saline soil, and has simple operation and can automatically collect and record data. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following further elaborates on the specific implementation manners of the present utility model in conjunction with the drawings.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0029] Figure 2 It is a schematic diagram of the plexiglass tank in the present utility model.

[0030] Figure 3 It is a schematic diagram of the top plate in the present utility model.

[0031] Figure 4 It is a sectional view of the bottom of the top plate in the present utility model.

[0032] Figure 5 It is a schematic diagram of the plexiglass tank connected with the top plate, water storage chamber, bolts, support rods, and heat insulation film in the present utility model.

[0033] Figure 6 It is a semi-structural schematic diagram of the plexiglass tank connected with the top plate, perforated plate, water storage chamber, bolts, support rods, and heat insulation film in the present utility model.

[0034] Figure 7This is a top view of the water storage chamber with a perforated plate in the present utility model.

[0035] Figure 8 This is a three-dimensional cross-sectional schematic diagram of the combined structure of the perforated plate, water storage chamber and support rod in the present utility model.

[0036] Figure 9 This is a semi-structural schematic diagram of the combined structure of the perforated plate, water storage chamber and support rod in the present utility model.

[0037] In the figure: 1 - plexiglass tank; 2 - perforated plate; 3 - water storage chamber; 4 - automatic weighing platform; 5 - heat insulation film; 6 - temperature sensor; 7 - soil water and salt sensor; 8 - mounting hole I; 9 - mounting hole II; 10 - top plate; 11 - bolt; 12 - threaded hole I; 13 - threaded hole II; 14 - drain valve; 15 - O-ring groove II; 16 - O-ring groove III; 17 - infrared thermal imager; 18 - halogen lamp; 19 - digital video camera; 20 - programmable constant temperature test chamber; 21 - Mariotte bottle; 22 - data acquisition line; 23 - data collector; 24 - computer; 25 - plexiglass tube; 26 - support rod; 27 - O-ring seal; 28 - O-ring groove I; 29 - filter paper. Detailed implementation mode

[0038] As Figures 1 to 9 shown, a non-saturated saline soil indoor evaporation and salt accumulation tester includes a programmable constant temperature test chamber 20, a Mariotte bottle 21 placed outside the programmable constant temperature test chamber 20, a data collector 23 and a computer 24, and a plexiglass tank 1, a perforated plate 2, a water storage chamber 3, an automatic weighing platform 4, a heat insulation film 5, several temperature sensors 6, several soil water and salt sensors 7, a top plate 10, an infrared thermal imager 17, a halogen lamp 18 and a digital video camera 19 placed inside the programmable constant temperature test chamber 20.

[0039] The bottom of the Mariotte bottle 21 is provided with a plexiglass tube 25, and the plexiglass tube 25 passes through the programmable constant temperature test chamber 20 and is connected to the water storage chamber 3; the top of the plexiglass tank 1 is provided with a top plate 10, and the bottom is provided with a water storage chamber 3. Both sides of the base of the water storage chamber 3 are provided with support rods 26; the support rods 26 are placed on the automatic weighing platform 4; the outer wall of the plexiglass tank 1 is wrapped with a heat insulation film 5, and several temperature sensors 6 and several soil water and salt sensors 7 are arranged inside; an infrared thermal imager 17 is arranged obliquely above the plexiglass tank 1, a halogen lamp 18 is arranged directly above, and a digital video camera 19 is arranged on the side of the plexiglass tank 1 flush with the top surface of the plexiglass tank 1; the perforated plate 2 is clamped into the water storage chamber 3, and a layer of filter paper 29 is covered on the perforated plate 2; O-ring seals 27 are provided on the plexiglass tank 1, the water storage chamber 3 and the top plate 10; several temperature sensors 6, soil water and salt sensors 7 and the automatic weighing platform 4 are all connected to the computer 24 through the data collector 23 via the data acquisition line 22.

[0040] Wherein: The plexiglass tank 1 is used to fill unsaturated saline soil. The height of the plexiglass tank 1 is 40 - 60 cm, the inner diameter is 20 - 30 cm, the wall thickness is 1 - 2 cm, its top surface is open, and O-ring grooves I28 for installing O-ring seals 27 are respectively embedded in the midlines of the top and bottom end faces.

[0041] The embedding width and depth of the O-ring groove I28 are both 2 mm.

[0042] The number of O-ring seals 27 is 2. The inner diameter is half of the sum of the inner diameter of the plexiglass tank 1 and its thickness, and the wire diameter is 3 mm.

[0043] Installation holes I8 for temperature sensors 6 and installation holes II9 for soil water and salt sensors 7 are reserved on the tank wall of the plexiglass tank 1; the temperature sensor 6 and the soil water and salt sensor 7 are installed inside the saline soil sample in the plexiglass tank 1 through the installation holes I8 and installation holes II9.

[0044] A number of threaded holes I12 are evenly distributed on the edge of the top plate 10; a number of threaded holes II13 are evenly distributed on the outer extension flange of the water storage chamber 3, and the positions and sizes of the threaded holes II13 are the same as those of the threaded holes I12; the top plate 10 and the water storage chamber 3 are connected together by detachable bolts 11 through the threaded holes I12 and threaded holes II13.

[0045] The top plate 10 is a stainless steel annular disc. The inner diameter of the disc is equal to the inner diameter of the plexiglass tank 1, the outer diameter is 30 - 40 cm, and the thickness is 1 - 2 cm; an O-ring groove II15 for embedding the O-ring seal 27 is provided on the bottom end face of the top plate 10, and the size, embedding width and depth of the O-ring groove II15 are the same as those of the O-ring groove I28.

[0046] An O-ring groove III16 for embedding the O-ring seal 27 is provided on the top end face of the water storage chamber 3, and the size, embedding width and depth of the O-ring groove III16 are the same as those of the O-ring groove I28; a drain valve 14 is reserved on the base of the water storage chamber 3.

[0047] A number of tiny holes are evenly distributed on the porous plate 2, and a flange is provided. The flange is embedded in the corresponding groove of the water storage chamber 3, and the shape of the groove matches that of the flange; the diameter of the porous plate 2 is equal to the inner diameter of the plexiglass tank 1, and the thickness is 0.5 - 1 cm.

[0048] The automatic weighing platform 4 selects the model AW20 produced by Beijing Huaming Tiandi Technology Co., Ltd., which has high sensitivity.

[0049] The digital video camera 19 selects the model FDR - AX60 produced by Sony Digital Products Co., Ltd., which has high pixels and clear imaging.

[0050] The infrared thermal imager 17 is of model FLIR produced by FIIR Company of the United States and can dynamically monitor the dynamic change process of the soil surface temperature.

[0051] The programmable constant temperature test chamber 20 is made of stainless steel.

[0052] A test method for an indoor evaporation and salt accumulation tester for unsaturated saline soil includes the following steps:

[0053] ① Install the perforated plate 2 at the top of the water storage chamber 3, embed the upper flange of the perforated plate 2 into the corresponding groove in the water storage chamber 3, and cover a layer of filter paper 29 above the perforated plate 2;

[0054] ② Place 1 O-ring seal 27 in the O-ring groove III 16 on the top end face of the water storage chamber 3, and then install the plexiglass tank 1 on the base at the top of the water storage chamber 3. When installing, ensure that the O-ring groove I 28 at the bottom of the plexiglass tank 1 can just be embedded into the O-ring seal 27;

[0055] ③ Install the temperature sensor 6 and the soil water and salt sensor 7 in the plexiglass tank 1 through the reserved mounting holes I 8 and mounting holes II 9, and layer the prepared saline soil into the plexiglass tank 1 according to the test plan so that the dry density of the soil sample is the same as the designed dry density in the test; to prevent layering during the test, each layer of the salt-containing soil is filled to a thickness of 5 cm, and the surface of each layer of soil is scraped and then filled again until the filling height is flush with the top surface of the plexiglass tank 1;

[0056] ④ Wrap the heat insulation film 5 around the outer wall of the plexiglass tank 1, and place another O-ring seal 27 in the O-ring groove I 28 at the top of the plexiglass tank 1, and then install the top plate 10 on the top of the plexiglass tank 1. When installing, ensure that the O-ring groove II 15 at the bottom of the top plate 10 can just be embedded into the O-ring seal 27;

[0057] ⑤ Use the bolt 11 to tightly connect the top plate 10 and the water storage chamber 3 through the threaded hole I 12 and the threaded hole II 13 to make it airtight, ensure that the O-ring seal 27 at the top of the plexiglass tank 1 can be firmly embedded into the O-ring groove I 28 at the top of the plexiglass tank 1 and the O-ring groove II 15 at the bottom of the top plate 10, and the O-ring seal 27 at the bottom of the plexiglass tank 1 can be firmly embedded into the O-ring groove I 28 at the bottom of the plexiglass tank 1 and the O-ring groove III 16 on the top end face of the water storage chamber 3, so that there is no water leakage between the plexiglass tank 1, the top plate 10 and the water storage chamber 3, and place the support rod 26 at the bottom of the water storage chamber 3 on the automatic weighing platform 4;

[0058] ⑥ Set up the digital camera 19 and the infrared thermal imager 17;

[0059] ⑦ Connect the automatic weighing platform 4, temperature sensor 6, and soil water and salt sensor 7 to the data collector 23 through the data acquisition line 22;

[0060] ⑧ Adjust the height of the halogen lamp 18, set the temperature inside the programmable constant temperature test chamber 20, start the test and collect data. The test period is 20 days. During the evaporation test, the temperature, water content, and salt concentration of the saline soil sample are dynamically monitored in real time through the temperature sensor 6 and soil water and salt sensor 7, and the temperature, water content, and salt concentration of the saline soil sample are uploaded to the computer 24. Monitor the water replenishment volume of the Mariotte bottle 21 and the change in the reading of the automatic weighing platform 4 in real time to obtain the water evaporation volume and water replenishment volume;

[0061] ⑨ Use the digital video camera 19 to monitor the crystallization and salt accumulation on the surface of the saline soil sample in real time and take pictures and upload them to the computer 24;

[0062] ⑩ Use the infrared thermal imager 17 to dynamically monitor the surface temperature change of the saline soil sample and take pictures and upload them to the computer 24.

[0063] The above content is only to illustrate the technical idea of the present utility model and cannot be used to limit the protection scope of the present utility model. Any modification made on the basis of the technical solution according to the technical idea proposed by the present utility model falls within the protection scope of the claims of the present utility model.

Claims

1. An indoor evaporation and salt accumulation tester for unsaturated saline soil, characterized in that: The tester includes a programmable constant temperature test chamber (20), a Mariotte bottle (21) placed outside the programmable constant temperature test chamber (20), a data collector (23) and a computer (24), and a plexiglass tank (1), a perforated plate (2), a water storage chamber (3), an automatic weighing platform (4), a heat insulation film (5), several temperature sensors (6), several soil water and salt sensors (7), a top plate (10), an infrared thermal imager (17), a halogen lamp (18) and a digital video camera (19) placed inside the programmable constant temperature test chamber (20); the bottom of the Mariotte bottle (21) is provided with a plexiglass tube (25), and the plexiglass tube (25) passes through the programmable constant temperature test chamber (20) and is connected to the water storage chamber (3); the top of the plexiglass tank (1) is provided with the top plate (10), and the bottom is provided with the water storage chamber (3), and both sides of the base of the water storage chamber (3) are provided with support rods (26); the support rods (26) are placed on the automatic weighing platform (4); the outer wall of the plexiglass tank (1) is wrapped with the heat insulation film (5), and several temperature sensors (6) and several soil water and salt sensors (7) are arranged inside; the digital video camera (19) is arranged obliquely above the plexiglass tank (1), and the halogen lamp (18) is arranged directly above, and the infrared thermal imager (17) flush with the top surface of the plexiglass tank (1) is arranged on the side of the plexiglass tank (1); the perforated plate (2) is snapped into the water storage chamber (3), and a layer of filter paper (29) is covered on the perforated plate (2); O-ring seals (27) are arranged on the plexiglass tank (1), the water storage chamber (3) and the top plate (10); several temperature sensors (6), the soil water and salt sensors (7) and the automatic weighing platform (4) are all connected to the computer (24) through a data acquisition line (22) via the data collector (23).

2. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 1, characterized in that: The top surface of the plexiglass tank (1) is open, and O-ring grooves I (28) for installing the O-ring seal (27) are respectively embedded in the midlines of the top and bottom end faces thereof.

3. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 2, characterized in that: The embedding width and depth of the O-ring groove I (28) are both 2 mm.

4. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 1, wherein: The number of the O-ring seals (27) is 2, the inner diameter is half of the inner diameter of the plexiglass tank (1) plus its thickness, and the wire diameter is 3 mm.

5. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 1, wherein: Mounting holes I (8) for the temperature sensors (6) and mounting holes II (9) for the soil water and salt sensors (7) are reserved on the tank wall of the plexiglass tank (1); the temperature sensors (6) and the soil water and salt sensors (7) are arranged inside the saline soil sample in the plexiglass tank (1) through the mounting holes I (8) and the mounting holes II (9).

6. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 1, wherein: A plurality of threaded holes I (12) are evenly distributed on the edge of the top plate (10); a plurality of threaded holes II (13) are evenly distributed on the outer extension flange of the water storage chamber (3), and the positions and sizes of the threaded holes II (13) are the same as those of the threaded holes I (12); the top plate (10) and the water storage chamber (3) are connected together by detachable bolts (11) through the threaded holes I (12) and the threaded holes II (13).

7. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 6, wherein: The top plate (10) is a stainless steel annular disc, and the inner diameter of the disc is equal to the inner diameter of the plexiglass tank (1); an O-ring groove II (15) for embedding the O-ring (27) is provided on the bottom end face of the top plate (10), and the size, embedding width and depth of the O-ring groove II (15) are the same as those of the O-ring groove I (28).

8. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 6, wherein: An O-ring groove III (16) for embedding the O-ring (27) is provided on the top end face of the water storage chamber (3), and the size, embedding width and depth of the O-ring groove III (16) are the same as those of the O-ring groove I (28); a drain valve (14) is reserved on the base of the water storage chamber (3).

9. The indoor evaporation and salt accumulation tester for unsaturated saline soil according to claim 1, wherein: A plurality of tiny holes are evenly distributed on the porous plate (2), and a flange is provided, and the flange is embedded in the corresponding groove of the water storage chamber (3), and the shape of the groove matches the flange; the diameter of the porous plate (2) is equal to the inner diameter of the plexiglass tank (1), and the thickness is 0.5 - 1 cm.

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