A test device and method for monitoring interception of arbor vegetation canopy layer

Abstract

This invention relates to an experimental device and method for monitoring canopy interception in arbor vegetation. The device includes a test chamber with an internal partition connected to a sleeve. The sleeve has a top opening for the trunk of the plant under test to pass through, with the diameter of the top opening larger than a set value for the trunk diameter to allow only branch runoff rainwater to enter the sleeve. The sleeve has a bottom opening with a sealing element for a sealed connection with the trunk of the plant under test. A penetrating rainwater collection assembly is located around the outer periphery of the sleeve. The bottom end of the sleeve is connected to a first rainfall monitoring element via a water supply pipe. The penetrating rainwater collection assembly is connected to a second rainfall monitoring element via a water supply pipe. A rain nozzle is located at the top of the test chamber and connected to a water supply mechanism. The experimental device of this invention provides accurate measurement results and has strong applicability.

Description

Technical Field

[0001] This invention relates to the technical field of vegetation canopy interception monitoring experimental devices, specifically to an experimental device and method for monitoring canopy interception of arbor vegetation. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] The rainwater interception function of vegetation canopy is crucial for maintaining ecological balance and sustainable development. Firstly, vegetation canopy effectively mitigates the impact of rainwater, preventing soil erosion and water loss, and maintaining ecosystem stability. Secondly, vegetation canopy promotes rainwater infiltration and retention, replenishing groundwater resources and maintaining the balance of the hydrological cycle. Furthermore, vegetation canopy purifies water quality and protects the health of aquatic ecosystems by intercepting pollutants in rainwater.

[0004] During rainfall, rainwater passing through the vegetation canopy is divided into three parts: one part is absorbed or adsorbed by the branches and leaves of trees (canopy interception); another part flows along the branches and trunks into the ground (branch and trunk runoff); and the remaining rainwater falls to the ground through the gaps between branches and leaves (throughfall). Since canopy interception is difficult to measure directly, the rainfall interception amount is usually calculated using the water balance method: Canopy interception = Total rainfall - Throughfall - Branch and trunk runoff. Currently, based on the principle of the water balance method, some experimental devices and methods for monitoring canopy interception in small trees have been proposed, but many are destructive to the vegetation. For example, the device and method disclosed in CN103076250A require pruning the tree canopy layer by layer. These techniques not only damage the vegetation, but also the parameters are not measured under the natural growth conditions of the vegetation, leading to significant errors in the results. After rainfall, some rainwater adsorbed on the surface of branches and leaves easily slides off to the ground under its own weight or the influence of the external environment; this is called drip rainfall. Because drip rainfall is difficult to monitor and its volume is relatively small, existing studies often neglect it, leading to inflated canopy interception monitoring results. Therefore, existing experimental devices and methods for monitoring canopy interception in arbor vegetation have certain shortcomings. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an experimental device and method for monitoring the interception of tree canopy, which can conduct non-destructive tests on vegetation and monitor drip rainfall, with more accurate measurement results.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide an experimental device for monitoring canopy interception of arbor vegetation, comprising a test chamber, an internal partition connected to a sleeve, a top opening for the trunk of the vegetation to be tested to pass through, the diameter of the top opening being larger than a set value for the diameter of the trunk of the vegetation to be tested so that only branch runoff rainwater can enter the sleeve, a bottom opening at the bottom of the sleeve having a sealing element for sealing connection with the trunk of the vegetation to be tested, a penetrating rainwater collection assembly on the outer periphery of the sleeve, a bottom end of the sleeve being connected to a first rainfall monitoring element via a water supply pipe, the penetrating rainwater collection assembly being connected to a second rainfall monitoring element via a water supply pipe, and a rain nozzle at the top of the test chamber being connected to a water supply mechanism.

[0008] Optionally, the sleeve includes a cylindrical body, with a plurality of first opening and closing plates hinged to the top of the cylindrical body. One end of each first opening and closing plate is hinged to the top of the sleeve, and the other end of the plurality of first opening and closing plates forms a top opening for the trunk of the vegetation to be tested to pass through.

[0009] Optionally, the sleeve includes a cylindrical body, with a plurality of second opening and closing plates hinged to the bottom end of the cylindrical body. One end of the second opening and closing plates is hinged to the bottom end of the sleeve, and the other end of the plurality of second opening and closing plates is provided with a rubber sealing strip and forms a bottom opening for the trunk of the vegetation to be tested to pass through.

[0010] Optionally, the rainwater harvesting assembly includes a support frame fixed to the outer periphery of the sleeve, on which a waterproof tarpaulin is laid;

[0011] Furthermore, the support frame includes multiple support rods distributed circumferentially around the outer periphery of the sleeve. One end of the support rod is hinged to the sleeve, and the other end of the support rod is provided with a water collection section. The outer end of the water collection section is bent upward. The support rod is also hinged to one end of a telescopic rod, and the other end of the telescopic rod is hinged to the sleeve to drive the support rod to rotate. The upper surface of the multiple support rods is covered with a waterproof cloth.

[0012] Optionally, the partition is detachably connected to a lifting mechanism installed at the bottom of the test chamber.

[0013] Optionally, the sleeve is formed by splicing a first semi-cylinder and a second semi-cylinder, and correspondingly, the partition is formed by splicing a first plate portion and a second plate portion, with the first plate portion fixed to the first semi-cylinder and the second plate portion fixed to the second semi-cylinder.

[0014] Optionally, the test chamber is equipped with a fan to apply wind load to the vegetation under test.

[0015] Optionally, the test chamber is also equipped with a circular guide rail, and the fan is slidably connected to the circular guide rail to apply wind load to the vegetation to be tested from different directions.

[0016] Optionally, the water supply mechanism includes a water storage tank, which is connected to a flow pump via a water delivery pipe, and the flow pump is connected to a rain sprinkler head via the water delivery pipe.

[0017] Secondly, embodiments of the present invention provide a method for monitoring the interception of tree canopy as described in the first aspect, comprising the following steps:

[0018] The sleeve is fitted around the trunk of the plant to be tested, which is placed in the test chamber, through the top and bottom openings. The plant to be tested is a potted plant in its natural growth state. The bottom opening is sealed to the trunk of the plant to be tested through a sealing element.

[0019] The water supply unit supplies water to the rain sprinklers, which then spray water onto the vegetation to be tested to simulate a rainfall process.

[0020] The sleeve collects rainwater runoff from the branches of the vegetation under test through the top opening and obtains the branch runoff volume in real time through the first rainfall monitoring element.

[0021] The rainwater collection component collects rainwater from the vegetation under test and obtains the amount of rainwater in real time through the second rainfall monitoring element;

[0022] The water supply system stops working, collects dripping rainwater through the rainwater collection components, and obtains the amount of dripping rainwater through the second rainfall monitoring element;

[0023] The total rainfall was obtained by measuring the working time and flow rate of the water supply system. The canopy interception of the vegetation under test was obtained based on the total rainfall, branch runoff, throughfall, and drip.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The experimental apparatus and method of the present invention includes a sleeve with a top opening and a bottom opening, which can be fitted around the trunk of the plant to be tested. A waterproof cloth is connected to the outer periphery of the sleeve via a support frame. A rain nozzle is provided at the top of the test chamber and is connected to a water supply mechanism. The water supply mechanism and the rain nozzle can simulate the rainfall process. The sleeve can collect runoff rainwater from the branches and trunk through the top opening, and the waterproof cloth can collect penetrating rainwater and dripping rainwater. The rainfall is measured by a first rainfall monitoring element and a second rainfall monitoring element to obtain the canopy interception amount. The sleeve is fitted around the trunk of the plant to be tested, and the entire experimental process does not require damage to the plant to be tested. The plant can be tested in its natural growth state, and the measurement results are more accurate.

[0026] 2. The test apparatus and method of the present invention, after the rain nozzles stop raining, can continue to collect dripping rainwater through the waterproof cloth and detect the amount of dripping rain, further improving the accuracy of the canopy interception detection results.

[0027] 3. The test apparatus and method of the present invention form a top opening through multiple first opening and closing plates and a bottom opening through multiple second opening and closing plates. Moreover, the coverage area of ​​the support can be adjusted by telescopic rods, thereby adjusting the coverage area of ​​the waterproof cloth. At the same time, the sleeve and partition can be height adjusted by lifting mechanism, which meets the test requirements of trees of different sizes and improves the applicability of the entire test apparatus.

[0028] 4. The test apparatus and method of the present invention, in which the fan is slidably connected to the annular guide rail, can simulate wind loads on the vegetation under test from different directions, further improving the applicability of the entire test apparatus. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0031] Figure 2 This is a cross-sectional view of the overall structure of Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic diagram of the assembly of the sleeve, support frame, and waterproof cloth in Embodiment 1 of the present invention;

[0033] Figure 4 This is a schematic diagram of the partition structure in Embodiment 1 of the present invention;

[0034] Figure 5 This is a schematic diagram of the assembly of the fan and the annular guide rail in Embodiment 1 of the present invention;

[0035] The components are as follows: 1. Test chamber, 2. Vegetation to be tested, 3. Electric lifting rod, 4. Partition, 5. Cylinder, 6. First opening and closing plate, 7. Second opening and closing plate, 8. Waterproof cloth, 9. Support rod, 10. Telescopic rod, 11. First water supply pipe, 12. First rain gauge, 13. Second water supply pipe, 14. Second rain gauge, 15. Box cover, 16. Rain nozzle, 17. Third water supply pipe, 18. Water storage tank, 19. Flow pump, 20. Circular guide rail, 21. Fan, 22. Fixing ring. Detailed Implementation

[0036] For ease of description, the words "upper" and "lower" appearing in this invention only indicate that they are consistent with the upper and lower directions of the accompanying drawings and do not limit the structure. They are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Example 1

[0038] This embodiment provides an experimental device for monitoring canopy interception in arborescent plants, such as... Figures 1-2 As shown, the test chamber 1 is open at the top, and potted trees in their natural growth state are placed inside the test chamber 1 as the vegetation to be tested 2.

[0039] The test chamber 1 is equipped with multiple lifting mechanisms, which are fixed to the upper surface of the bottom wall of the test chamber 1. In this embodiment, the existing electric lifting rod 3 can be used as the lifting mechanism.

[0040] Multiple lifting mechanisms are fixedly connected to the partition 4. The partition 4 divides the internal space of the test chamber 1 into an upper and lower layer. The lifting mechanisms can drive the partition 4 to move up and down, thereby adjusting the volume of the upper and lower layers.

[0041] A sleeve passes coaxially through the partition 4, and the partition 4 is fixedly connected to the sleeve. The sleeve is used to be set on the outer periphery of the trunk of the vegetation to be tested.

[0042] In this embodiment, in order to adapt to the tree trunk of the vegetation to be tested, the sleeve is a cylindrical sleeve. In order to facilitate the placement of the tree trunk inside the sleeve, the sleeve is composed of a first semi-circular cylinder and a second semi-circular cylinder spliced ​​together by bolts, and a sealing strip is provided at the splicing surface to seal the splicing surface of the first semi-circular cylinder and the second semi-circular cylinder.

[0043] Correspondingly, such as Figure 4 As shown, the partition 4 is composed of a first plate and a second plate. The first plate has a semi-circular groove at the splicing surface, and the second plate has a semi-circular groove at the splicing surface. The two semi-circular grooves are spliced ​​together to form a through hole through which the sleeve passes.

[0044] Both the first plate and the second plate are detachably and fixedly connected to the lifting part of the corresponding electric lifting rod 3 by bolts.

[0045] The first semi-circular cylinder is directly fixed to the semi-circular groove of the first plate, and the second semi-circular cylinder is directly fixed to the semi-circular groove of the second plate. Alternatively, to improve the fixing strength, the first semi-circular cylinder is fixed to the inner ring surface of the first fixing semi-circular ring, and the first semi-circular fixing ring is detachably fixed to the upper surface of the first plate by bolts. The second semi-circular cylinder is fixed to the inner ring surface of the second fixing semi-circular ring, and the second fixing semi-circular ring is detachably fixed to the upper surface of the second plate by bolts.

[0046] The first semicircular fixing ring and the second semicircular fixing ring together form the entire fixing ring 22.

[0047] The top of the sleeve has a top opening with a diameter larger than that of the trunk of the vegetation to be tested. The difference between the top opening and the trunk diameter is set to ensure that the top opening only allows rainwater runoff from the branches to enter the sleeve, while other penetrating rainwater cannot enter the sleeve.

[0048] The sleeve has a bottom opening with a sealing element so that when the tree trunk to be tested passes through the bottom opening, the bottom opening is sealed to the tree trunk through the sealing element.

[0049] Preferably, the sealing element can be a rubber sealing strip.

[0050] To meet the experimental needs of different vegetation types and improve the applicability of the entire experimental setup, such as... Figure 3 As shown, the sleeve includes a cylindrical body 5 with open ends. Multiple first opening and closing pieces 6 are hinged to the open top end of the cylindrical body 5. When the multiple first opening and closing pieces 6 are closed, they can form a frustum-shaped structure. One end of the first opening and closing piece 6 is hinged to the top of the cylindrical body 5, and the other ends of the multiple first opening and closing pieces 6 form a top opening.

[0051] Rotating the first opening piece 6 allows adjustment of the size of the top opening.

[0052] The bottom end of the cylinder 5 is hinged with a plurality of second opening and closing pieces 7. When the plurality of second opening and closing pieces 7 are closed, they can form an inverted frustum-shaped structure. One end of the second opening and closing piece 7 is hinged to the bottom end of the cylinder 5 through a hinge. The other ends of the plurality of second opening and closing pieces 7 form a bottom opening and are fixed with a rubber sealing strip, which can contact the trunk of the vegetation 2 to be tested through the rubber sealing strip.

[0053] In this embodiment, both the first hinge piece 6 and the second hinge piece 7 are positioned and fixed by the frictional force at the hinge pivot.

[0054] Preferably, two first opening and closing pieces 6 and two second opening and closing pieces 7 are provided. It can be understood that four or other quantities of the first opening and closing pieces 6 and the second opening and closing pieces 7 can be provided, and those skilled in the art can set them according to actual needs.

[0055] The outer cylinder surface of the sleeve is provided with a rainwater collection component to collect rainwater from the vegetation under test. The rainwater collection component includes a support frame, on which a waterproof cloth 8 is laid. The coverage area of ​​the waterproof cloth 8 is larger than the coverage area of ​​the canopy of the vegetation under test 2. Rainwater from the vegetation under test 2 is collected through the waterproof cloth 8.

[0056] In this embodiment, the support frame includes a plurality of support rods 9, which are equally spaced along the circumference. One end of each support rod 9 is hinged to a sleeve, and the other end is provided with a water collection section. The outer end of the water collection section is bent upward so that the waterproof cloth 8 laid out can also be bent upward at the radial outer end, thereby preventing the collected penetrating rainwater from sliding down the waterproof cloth 8 and realizing the collection of penetrating rainwater.

[0057] Below the support rod 9 is a telescopic rod 10. One end of the telescopic rod 10 is hinged to the support rod 9, and the other end is hinged to the sleeve. The telescopic movement of the telescopic rod 10 can drive the support rod to rotate, thereby adjusting the coverage area of ​​the circumference of the outer ends of multiple support rods 9 to meet the experimental needs of different vegetation 2 to be tested.

[0058] The telescopic rod 10 can be made using existing technology, including a fixed part and a telescopic part that telescopically connects to the fixed part. The fixed part is provided with a plurality of first fixing holes distributed along the axial direction, and the telescopic part is provided with second fixing holes that match the first fixing holes. The telescopic part and the fixed part are locked and fixed by the first fixing holes, the second fixing holes, and fixing bolts and nuts.

[0059] The upper surface of the support rod 9 is covered with a waterproof cloth 8 for collecting penetrating rainwater. The radial outer edge of the waterproof cloth 8 is bent upward to prevent the collected penetrating rainwater from slipping off the waterproof cloth.

[0060] One of the second opening and closing plates 7 is connected to one end of the first water supply pipe 11, so that the first water supply pipe 11 is connected to the internal space of the sleeve. The other end of the first water supply pipe 11 is connected to the first rainfall monitoring element set inside the test chamber. In this embodiment, the first rainfall monitoring element is a first rain gauge 12. The branch and trunk runoff of the vegetation 2 to be tested can be obtained in real time through the first rain gauge 12.

[0061] The waterproof cloth 8 is connected to one end of the second water supply pipe 13 in the water collection section. The other end of the second water supply pipe 13 passes through the partition 4 and is connected to the second rainfall monitoring element. In this embodiment, the second rainfall monitoring element is a second rain gauge 14. The second rain gauge 14 can obtain the penetration rainfall of the vegetation 2 under test in real time. After the rainfall stops, the second rain gauge 14 can also obtain the drip rainfall of the vegetation 2 under test.

[0062] The first rain gauge 12 and the second rain gauge 14 are placed on the bottom wall of the test chamber.

[0063] Furthermore, in order to meet the adjustment requirements of the second opening and closing piece 7 and the waterproof cloth 8, both the first water supply pipe 11 and the second water supply pipe 12 are made of flexible pipes, such as transparent silicone pipes or rubber pipes.

[0064] The test chamber 1 has a lid 15 that is detachably fixed to the top opening by bolts. The lid 15 is also detachably fixed to a rain nozzle 16 by bolts. After the lid 15 is fixed to the test chamber 1, the rain nozzle 16 is located at the top of the internal space of the test chamber 1 and is used to spray water onto the plant 2 to be tested inside the test chamber 1 to simulate the rainfall process.

[0065] Different rainfall conditions, i.e. rainfall coverage, can be simulated by changing the arrangement and / or density of the rain nozzles 16.

[0066] The coverage area of ​​the rainfall nozzle 16 covers the entire canopy of the vegetation 2 to be tested.

[0067] The rain nozzle 16 is connected to one end of the third water supply pipe 17, and the other end of the third water supply pipe 17 is connected to the water storage tank 18. A flow pump 19 is installed on the third water supply pipe 17. Different rainfall intensities and rainfall amounts are controlled by adjusting the flow rate of the flow pump 19 and the pumping time.

[0068] The flow rate of the flow pump 19 is predetermined, and the total rainfall of the vegetation to be tested 2 can be obtained by measuring the pumping time.

[0069] like Figure 5 As shown, an annular guide rail 20 is also provided above the internal partition 4 of the test chamber 1. The annular guide rail 20 is fixedly connected to the inner side of the test chamber 1. A fan 21 is slidably connected on the annular guide rail 20. The fan 21 is used to apply wind load to the plant 2 under test. The fan 21 slides along the annular guide rail 20, which can adjust the relative position of the fan 21 and the plant 2 under test to simulate applying wind load to the plant 2 under test from different directions, further improving the applicability of the entire test device.

[0070] Example 2

[0071] This embodiment provides a method for monitoring the interception of tree canopy vegetation using the experimental device described in Embodiment 1, comprising the following steps:

[0072] Step 1: Set up the test chamber 1 and adjust the fan 21 to the required position according to the wind direction requirements of the test.

[0073] Step 2: Place the plant to be tested 2 inside the test chamber 1, wherein the plant to be tested 2 is a potted tree plant in its natural growth state.

[0074] Step 3: Install sleeves around the trunk of the plant to be tested 2, and place the first rain gauge 12 and the second rain gauge 14 at the bottom of the test chamber. Connect the first rain gauge 12 to the second opening and closing plate 7 through the first water supply pipe 11, and connect the second rain gauge 14 to the waterproof cloth 8 through the second water supply pipe 13.

[0075] Step 4: Fix the sleeve to the partition 4 via the fixing ring 22, then fix the partition 4 to the electric lifting rod 3, and raise the partition 4 and the sleeve to the set height via the electric lifting rod 3.

[0076] Step 5: Rotate the first opening and closing piece 6 to adjust the size of the opening at the top of the sleeve so that the difference between the diameter of the opening at the top and the diameter of the trunk of the plant to be tested 2 reaches the set value, which is 1.2-1.5 times the diameter of the raindrop, preferably 2mm-5mm. Then wrap sealing tape around the outer periphery of the multiple first opening and closing pieces 6 to seal the gaps between adjacent first opening and closing pieces 6. Rotate the second opening and closing piece 7 so that the rubber sealing strip at the bottom of the second opening and closing piece 7 fits tightly against the trunk of the plant to be tested 2. Then wrap sealing tape around the outer periphery of the multiple second opening and closing pieces 7 to seal the gaps between adjacent second opening and closing pieces 7.

[0077] Step 6: Adjust the length of the telescopic rod 10 so that the opening range of the waterproof cloth can cover the entire canopy of the vegetation 2 to be tested.

[0078] Step 7: Install the cover 8 at the top opening of the test chamber 1. At this time, the rain nozzle 16 is directly above the vegetation 2 to be tested. Connect the third water supply pipe 17, the flow pump 16, and the water storage tank 18.

[0079] Step 8: Set the fan's operating speed according to the wind speed requirements of the test, and then set the flow rate of the flow pump.

[0080] Step 9: Start the flow pump 16 and fan 21. The fan 21 applies wind load to the vegetation under test 2. The flow pump 16 drives the water in the water storage tank 18 to flow into the rain nozzle 16 through the third water supply pipe 17 and spray it onto the vegetation under test 2 through the rain nozzle 16 to simulate the rainfall process.

[0081] During rainfall, the runoff from the branches of the vegetation under test 2 enters the sleeve through the opening at the top of the sleeve. The sleeve is used to collect the runoff, and the first rain gauge 12 is used to obtain the runoff volume in real time. The penetrating rainwater from the vegetation under test 2 enters the waterproof cloth 8. The waterproof cloth 8 is used to collect the penetrating rainwater, and the second rain gauge 14 is used to obtain the penetrating rain volume in real time.

[0082] When the flow pump 16 is turned off, the rainfall stops. The branch runoff and penetration rainfall during the entire rainfall process can be obtained through the first rain gauge 12 and the second rain gauge 14. The total rainfall can be obtained through the working time and flow rate of the flow pump 16.

[0083] After the rainfall stops, continue to monitor the rainfall collected by the second rain gauge 14. At this time, the monitored rainfall is the drip rainfall. When the rainfall collected by the second rain gauge 14 no longer changes over time, stop the experiment and obtain the final drip rainfall.

[0084] The canopy interception of the vegetation to be tested = total rainfall - through rainfall - branch runoff - drip rainfall.

[0085] The experimental apparatus and method of this embodiment do not require damage to the vegetation to be tested during the entire experimental process. The vegetation to be tested is tested under natural growth conditions. Moreover, the amount of dripping rain is taken into account when calculating the canopy interception, so the measurement results are more accurate. Furthermore, the monitoring is real-time, which can obtain the dynamic change process of the canopy interception of the vegetation to be tested over time.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A test device for monitoring canopy interception of arbor vegetation, characterized in that, The test box is internally provided with a partition plate, the partition plate is connected with a sleeve, the top of the sleeve is provided with a top opening for the trunk of the vegetation to be tested to pass through, the diameter of the top opening is greater than the diameter of the trunk of the vegetation to be tested to ensure that only the branch runoff rainwater can enter the sleeve, the bottom of the sleeve is provided with a bottom opening, the bottom opening is provided with a sealing element to be sealingly connected with the trunk of the vegetation to be tested, the outer periphery of the sleeve is provided with a penetrating rainwater collecting assembly, the bottom end of the sleeve is connected with a first rainfall monitoring element through a water conveying pipe, the penetrating rainwater collecting assembly is connected with a second rainfall monitoring element through a water conveying pipe, the top of the test box is provided with a rainfall nozzle, and the rainfall nozzle is connected with a water supply mechanism; The sleeve comprises a barrel, a plurality of first opening and closing pieces are hinged to the top end of the barrel, a plurality of second opening and closing pieces are hinged to the bottom end of the barrel, one end of the second opening and closing pieces is hinged to the bottom end of the sleeve, and the other end of the second opening and closing pieces is provided with a rubber sealing strip and forms a bottom opening for the trunk of the vegetation to be tested to pass through; The penetrating rainwater collecting assembly comprises a support frame fixed on the outer periphery of the sleeve, and a waterproof cloth is laid on the support frame; The support frame comprises a plurality of support rods distributed in the circumferential direction on the outer periphery of the sleeve, one end of the support rod is hinged to the sleeve, the other end of the support rod is provided with a water collecting section, the outer end of the water collecting section is bent upward, the support rod is further hinged to one end of an extension rod, the other end of the extension rod is hinged to the sleeve to drive the support rod to rotate, and a waterproof cloth is laid on the upper surfaces of the plurality of support rods; The partition plate is detachably connected with a lifting mechanism installed at the bottom of the test box.

2. A test device for monitoring canopy interception of arbor vegetation according to claim 1, characterized in that, One end of the first opening and closing piece is hinged to the top end of the sleeve, and the other end of the plurality of first opening and closing pieces forms a top opening for the trunk of the vegetation to be tested to pass through.

3. A test device for monitoring canopy interception of arbor vegetation according to claim 1, characterized in that, The sleeve is composed of a first half-cylinder and a second half-cylinder, and correspondingly, the partition plate is composed of a first plate part and a second plate part, the first plate part is fixed with the first half-cylinder, and the second plate part is fixed with the second half-cylinder.

4. The test device for monitoring the canopy interception of arbor vegetation according to claim 1, characterized in that, The test box is internally provided with a fan to apply wind load to the vegetation to be tested.

5. A test device for monitoring canopy interception of arbor vegetation according to claim 4, characterized in that, The test box is further internally provided with a circular ring-shaped guide rail, and the fan is slidingly connected with the circular ring-shaped guide rail to apply wind load to the vegetation to be tested from different directions.

6. A test device for monitoring canopy interception of arbor vegetation according to claim 1, characterized in that, The water supply mechanism comprises a water storage tank, the water storage tank is connected with a flow pump through a water conveying pipe, and the flow pump is connected with the rainfall nozzle through a water conveying pipe.

7. A method for testing the device for monitoring the canopy interception of a tree vegetation according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: The sleeve is sleeved on the outer periphery of the trunk of the vegetation to be tested placed in the test box through the top opening and the bottom opening, wherein the vegetation to be tested is a vegetation in a natural growth state in a pot, and the bottom opening is sealingly connected with the trunk of the vegetation to be tested through the sealing element; The water supply mechanism supplies water to the rainfall nozzle, and the rainfall nozzle sprays water to the vegetation to be tested to simulate the rainfall process; The sleeve collects the branch runoff rainwater of the vegetation to be tested through the top opening and obtains the branch runoff volume in real time through the first rainfall monitoring element; The penetrating rainwater collecting assembly collects the penetrating rainwater of the vegetation to be tested and obtains the penetrating rainfall volume in real time through the second rainfall monitoring element; The water supply mechanism stops working, the penetrating rainwater collecting assembly collects the dripping rainwater, and the second rainfall monitoring element obtains the dripping rainfall volume; The total rainfall volume is obtained through the working time and flow of the water supply mechanism, and the canopy interception volume of the vegetation to be tested is obtained according to the total rainfall volume, the branch runoff volume, the penetrating rainfall volume and the dripping rainfall volume.

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