In-situ monitoring device for surface water-underground water conversion relation and flux

Abstract

The invention is suitable for the technical field of water environment monitoring, and provides an in-situ monitoring device for a surface water-underground water conversion relation and flux, and the device comprises a control platform which is located on a water bank and comprises a power supply module, a data processing module and a flow measurement module; the probe is located under the surface water surface and used for collecting data, one end of the probe is sharp and inserted into a riverbed, and the other end of the probe is exposed in the surface water; and the probe is connected with the control platform. According to the invention, the number and positions of the probes embedded into the riverbed can be adjusted according to different monitoring requirements, and the surface water-underground water conversion relation and flux at different depths of the profile can be monitored continuously in real time; a power supply mode and a data storage or data transmission module can be selected according to actual application conditions, so that the continuous observation capability of the instrument is improved; the requirement for the installation environment is low, and automatic data collection is achieved; the accuracy of the measured conclusion is high; and the equipment damage condition and the data reliability in the monitoring process can be checked.

Description

Technical Field

[0001] The invention belongs to the technical field of water environment monitoring, and in particular relates to an in-situ monitoring device for surface water-groundwater conversion relationship and flux. Background Art

[0002] Surface water and groundwater are two main forms of water bodies in the natural hydrological cycle. There is mutual transformation of water quantity, water quality and energy between the two, and they have important scientific significance for the formation, distribution and spatiotemporal evolution of water resources, the evaluation, development, utilization and management of water resources, the prevention and protection of water pollution, the protection of river basin ecological environment, and even global changes such as greenhouse gas emissions in the environment. Although the hydrodynamic mechanism and process of the mutual transformation between surface water and groundwater are easy to understand, the transformation relationship between surface water and groundwater often has temporal and spatial variability due to many factors such as natural geographical conditions, geological and hydrogeological conditions, and the development and utilization of water resources. At the same time, due to the technical level and system layout density of conventional hydrological and groundwater dynamic monitoring, it is often very difficult to accurately describe the transformation relationship between surface water and groundwater in specific areas and their spatiotemporal variation.

[0003] At present, the judgment of the transformation relationship between surface water and groundwater is mainly based on indirect methods such as isotopes, water chemistry and temperature tracing. The application of in-situ direct monitoring methods is relatively small, and the conclusions are not intuitive. Among the in-situ monitoring methods, existing devices such as traditional seepage meters, thermal pulse automatic seepage meters and ultrasonic automatic seepage meters are mainly based on small point-scale monitoring, and can only realize one-way monitoring of groundwater discharge to surface water. They cannot work for a long time, have poor accuracy and low efficiency. The measurement of profile scale requires the establishment of multiple monitoring wells to establish a monitoring profile, which is costly and difficult to achieve high-temporal and spatial density measurement. It is still impossible to measure and distinguish the transformation direction and intensity at different depths of the profile. Based on the above existing technical problems, a device is proposed to directly, in real time and with high frequency, monitor the surface water-groundwater transformation relationship and its flux at different depths of the profile. Summary of the invention

[0004] The purpose of the present invention is to provide an in-situ monitoring device for the surface water-groundwater conversion relationship and flux, aiming to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An in-situ monitoring device for surface water-groundwater conversion relationship and flux, comprising:

[0007] The control platform is located on the water bank and includes a power supply module, a data processing module and a flow measurement module;

[0008] The probe is located under the surface of the surface water and is used to collect data. One end of the probe is sharply inserted into the riverbed, and the other end is exposed in the surface water. The probe is connected to the control platform.

[0009] Further, the probe comprises:

[0010] A main pipe, the main pipe is divided into three parts: an upper pipe, a middle pipe and a lower pipe, and both ends of the main pipe are provided with external threads;

[0011] The hollow tube is nested in the main tube, and evenly distributed holes are arranged on the tube walls of the upper tube and the lower tube; gravel is filled between the hollow tube and the main tube;

[0012] Steel grit mesh, embedded in the inner wall of the main pipe, located in the upper pipe and lower pipe parts;

[0013] An upper cover, the upper cover is connected with the external thread at one end of the main pipe;

[0014] A cone tip, the cone tip being connected with the external thread at the other end of the main pipe;

[0015] Electromagnetic flowmeter, installed on the middle tube of the hollow tube, is used to record the direction and flow of water in real time;

[0016] Two pressure and temperature sensors are respectively arranged in the upper pipe and the lower pipe to monitor the pressure and temperature of surface water and groundwater respectively.

[0017] Furthermore, the lengths of the main pipe and the cone tip are 1 m and 0.2 m respectively; the lengths of the upper pipe, the middle pipe and the lower pipe are 0.1 m, 0.8 m and 0.1 m respectively; the diameter of the main pipe is 5 cm; and the diameter of the hollow pipe is 2 cm.

[0018] Furthermore, the outer side of the upper tube is evenly distributed with radial anti-entanglement thorns perpendicular to the tube wall.

[0019] Furthermore, the probe also includes a wire, which is connected from the connection between the middle pipe and the upper pipe of the main pipe and is connected to the control platform. The wire is used to transmit the electric energy provided by the control platform to the probe, and transmit the signals and data collected by the electromagnetic flowmeter and the pressure and temperature sensor to the flow measurement module of the control platform for analysis and processing.

[0020] Furthermore, the diameter of the gravel is larger than the diameter of the hole.

[0021] Furthermore, the data processing module is one of a data storage module and a data transmission module.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention can adjust the number and position of the probes embedded in the riverbed according to different monitoring requirements, and monitor the surface water-groundwater conversion relationship and flux at different depths of the profile in real time and continuously, thereby achieving flexible acquisition of in-situ data.

[0024] 2. The control platform of the present invention includes a power supply module and a data processing module. The power supply mode and the optional data storage or data transmission module can be selected according to the actual application situation, thereby improving the continuous observation capability of the instrument.

[0025] 3. The profile monitoring device provided by the present invention has low requirements for the installation environment. Compared with the traditional monitoring method of establishing a monitoring profile, it is faster and more economical. It does not require a large amount of manpower, material resources and time investment, and realizes automatic data collection.

[0026] 4. The conclusions obtained by the present invention are highly accurate: the slender structure of the probe makes it easier to bury and remove it from the riverbed and reduces the disturbance of sediments; the anti-tangling and thorn-proof design of the upper tube avoids the influence of debris in the surface water on the measurement effect; after the probe is buried, monitoring begins after it has been left to stand still for a period of time, reducing the error of collected data; the introduction of sensor elements to complete the measurement reduces human intervention and errors.

[0027] 5. The present invention adopts multi-parameter integrated monitoring, which can check the equipment damage and data reliability during the monitoring process: the hydraulic flux can be indirectly obtained according to Darcy's law from the water pressure values ​​of the sensors in the upper pipe and the lower pipe. This result is compared with the flux monitoring result of the electromagnetic flowmeter to check the correction data and whether the inspection equipment is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention.

[0029] Figure 2 It is a cross-sectional schematic diagram of the probe in the present invention.

[0030] In the figure: 1-solar panel; 2-conductor; 3-flow measurement module; 4-power supply module; 5-data processing module; 6-control platform; 7-probe; 8-upper cover; 9-anti-entanglement; 10-sensor; 11-main pipe; 12-hollow pipe; 13-electromagnetic flowmeter; 14-steel sand net; 15-cone tip. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1 and Figure 2 As shown, an in-situ monitoring device for surface water-groundwater conversion relationship and flux provided by an embodiment of the present invention includes:

[0034] The control platform 6 is located on the water bank and includes a power supply module 4, a data processing module 5 and a flow measurement module 3; the device is controlled as a whole; the data processing module 5 is one of a data storage module and a data transmission module.

[0035] The probe 7 is located under the surface of the surface water and is used to collect data. One end of the probe 7 is sharply inserted into the riverbed, and the other end is exposed in the surface water. The probe 7 is connected to the control platform 6.

[0036] In the embodiment of the present invention, preferably, the probe 7 can be made of environmentally friendly materials that are non-magnetic and non-electrical, such as organic glass, fiberglass, PVC, and carbon steel.

[0037] The control platform 6 on the shore can be connected to several probes 7, and the probes 7 are designed according to the monitoring requirements and embedded in different riverbed depths of the target profile for simultaneous monitoring, so as to achieve the purpose of real-time and continuous monitoring of the surface water-groundwater conversion relationship and flux at different depths of the profile, and achieve flexible acquisition of in-situ data.

[0038] Before using this device for in-situ monitoring, the basic information of the target profile should be mastered first, and the number and location of the probes should be reasonably designed according to the profile overview and monitoring purpose.

[0039] The device is uniformly powered by a power supply module 4 , which can be powered by an external power source or by converting light energy into power through a solar panel 1 , thereby ensuring the monitoring continuity of the device.

[0040] Data storage module or data transmission module can be selected according to actual application.

[0041] like Figure 1 and Figure 2 As shown, as a preferred embodiment of the present invention, the probe 7 includes:

[0042] A main pipe 11, wherein the main pipe 11 is divided into three parts: an upper pipe, a middle pipe and a lower pipe, and both ends of the main pipe 11 are provided with external threads;

[0043] The hollow tube 12 is nested in the main tube 11. In the upper and lower tube parts, the main tube 11 and the hollow tube 12 are provided with evenly distributed holes on their walls. Sand and gravel of different particle sizes can be selected and filled between the hollow tube 12 and the main tube 11 according to the target riverbed conditions, and the particle size of the sand and gravel is ensured so that it will not flow in through the holes. So that the upper and lower tubes can achieve water permeability and filtration of surface water and groundwater respectively; the outer wall and the upper and lower ends of the middle tube are impermeable, and only the hollow tube 12 is connected to the upper and lower tubes inside;

[0044] A steel grit mesh 14 is embedded in the inner wall of the main pipe 11 and is located at the upper pipe and the lower pipe;

[0045] An upper cover 8, wherein the upper cover 8 is connected with an external thread at one end of the main pipe 11;

[0046] A cone tip 15, wherein the cone tip 15 is connected with the external thread at the other end of the main pipe 11;

[0047] The electromagnetic flowmeter 13 is installed on the middle pipe part of the hollow pipe 12. When hydraulic exchange occurs between surface water and groundwater, the water flow process can be reflected in the hollow pipe 12, and the direction and flux of the water flow are recorded in real time by the electromagnetic flowmeter 13;

[0048] Two pressure and temperature sensors 10 are respectively arranged in the upper pipe and the lower pipe, and are used to monitor the pressure and temperature of the surface water and the groundwater respectively;

[0049] Wire 2, which is connected from the connection between the middle pipe and the upper pipe of the main pipe 11 and connected to the control platform 6. The wire 2 is used to transmit the electric energy provided by the control platform 6 to the probe 7, and transmit the signals and data collected by the electromagnetic flowmeter 13 and the pressure and temperature sensor 10 to the flow measurement module 3 of the control platform 6 for analysis and processing.

[0050] In the embodiment of the present invention, preferably, the hydraulic flux can be indirectly obtained according to Darcy's law from the water pressure values ​​of the sensor 10 in the upper pipe and the lower pipe. This result can be compared with the flux result monitored by the electromagnetic flowmeter 13 to check the correction data and whether the inspection equipment is damaged.

[0051] The upper cover 8 and the main pipe 11 as well as the cone tip 15 and the main pipe 11 can be disassembled and connected through the threads on the outer wall of the port of the main pipe 11, so as to facilitate the filling and unloading of sand of appropriate particle size into the upper pipe and the lower pipe, and the filled sand should be compacted as much as possible. The sand should be fully rinsed before filling, and the sand in the probe 7 and the pipe should be cleaned in time after the monitoring is completed. After the sand filling is completed, the wire 2 is connected. Keep the cone tip 15 downward, and slowly insert the probe 7 into the water from bottom to top to ensure that there are no trapped bubbles in the probe 7. According to the design requirements, the probe 7 is inserted into the corresponding position of the riverbed. During this process, the disturbance should be minimized to ensure that the upper pipe is completely exposed to the surface water. It needs to be left to stand for a while after the insertion. After the water flow state is stable, the switch of the control platform 6 can be turned on to start measurement.

[0052] Surface water and groundwater can enter the hollow pipe 12 through the filter of the pipe wall. At this time, the sensors 10 on both sides perform high-frequency monitoring on the pressure and temperature of surface water and groundwater. The bidirectional circulation of surface water and groundwater in the hollow pipe 12 is recorded by the electromagnetic flowmeter 13. The corresponding monitoring signals and data are transmitted to the flow measurement module 3 of the control platform 6 through the wire 2 for analysis and processing to generate monitoring data. The monitoring data is finally output to the data storage module or directly sent to the remote control center through the data transmission module.

[0053] like Figure 2 As shown, as a preferred embodiment of the present invention, the lengths of the main pipe 11 and the cone tip 15 are 1m and 0.2m respectively; the lengths of the upper pipe, the middle pipe and the lower pipe are 0.1m, 0.8m and 0.1m respectively; the diameter of the main pipe 11 is 5cm; and the diameter of the hollow pipe 12 is 2cm.

[0054] In the embodiment of the present invention, preferably, the above length dimensions can be improved according to the size of the actual measuring element assembled in the probe 7, but the probe 7 should be kept as slender as possible to facilitate the embedding and removal of the probe 7 in the riverbed and reduce the disturbance to the sediment.

[0055] like Figure 2 As shown, as a preferred embodiment of the present invention, the outer side of the upper tube is evenly distributed with vertical tube wall and radial anti-entanglement thorns 9 to prevent floating objects such as water plants from entanglement and blocking the upper tube and affecting water intake.

[0056] The working principle of the present invention is:

[0057] The in-situ monitoring device for the surface water-groundwater conversion relationship and flux is to fill the upper pipe and the lower pipe with sand of appropriate particle size. After the sand filling is completed, the upper cover 8 and the cone tip 15 are installed, and the wire 2 is connected. Keep the cone tip 15 downward, slowly insert the probe 7 from bottom to top into the water, let it stand for a period of time after insertion, and turn on the switch of the control platform 6 to start measurement after the water flow state is stable. The surface water and groundwater can pass through the filter of the pipe wall to enter the hollow pipe 12 respectively. At this time, the sensors 10 on both sides perform high-frequency monitoring of the pressure and temperature of the surface water and groundwater, and the bidirectional circulation of the surface water and groundwater in the hollow pipe 12 is recorded by the electromagnetic flowmeter 13. The corresponding monitoring signals and data are transmitted to the flow measurement module 3 of the control platform 6 through the wire 2 for analysis and processing to generate monitoring data, which are finally output to the data storage module or directly sent to the remote control center through the data transmission module.

[0058] The above are only preferred embodiments of the present invention. It should be pointed out that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These should also be regarded as the protection scope of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An in-situ monitoring device for surface water-groundwater conversion relationship and flux, characterized in that: include: The control platform is located on the water bank and includes a power supply module, a data processing module and a flow measurement module; The probe is located under the surface of the surface water and is used to collect data. One end of the probe is sharply inserted into the riverbed, and the other end is exposed in the surface water. The probe is connected to the control platform.

2. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 1, characterized in that: The probe comprises: A main pipe, the main pipe is divided into three parts: an upper pipe, a middle pipe and a lower pipe, and both ends of the main pipe are provided with external threads; The hollow tube is nested in the main tube, and evenly distributed holes are provided on the tube walls of the upper tube and the lower tube; gravel is filled between the hollow tube and the main tube; Steel grit mesh, embedded in the inner wall of the main pipe, located in the upper pipe and lower pipe parts; An upper cover, the upper cover is connected with the external thread at one end of the main pipe; A cone tip, the cone tip being connected with the external thread at the other end of the main pipe; Electromagnetic flowmeter, installed on the middle tube of the hollow tube, is used to record the direction and flow of water in real time; Two pressure and temperature sensors are respectively arranged in the upper pipe and the lower pipe to monitor the pressure and temperature of surface water and groundwater respectively.

3. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 2, characterized in that: The lengths of the main pipe and the cone tip are 1m and 0.2m respectively; the lengths of the upper pipe, the middle pipe and the lower pipe are 0.1m, 0.8m and 0.1m respectively; the diameter of the main pipe is 5cm; and the diameter of the hollow pipe is 2cm.

4. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 2, characterized in that: The outer side of the upper tube is evenly distributed with vertical tube walls and radial anti-entanglement thorns.

5. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 2, characterized in that: The probe also includes a wire, which is connected from the connection between the middle pipe and the upper pipe of the main pipe and is connected to the control platform. The wire is used to transmit the electric energy provided by the control platform to the probe, and transmit the signals and data collected by the electromagnetic flowmeter and the pressure and temperature sensor to the flow measurement module of the control platform for analysis and processing.

6. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 1, characterized in that: The diameter of the gravel is larger than the diameter of the holes.

7. The in-situ monitoring device for surface water-groundwater conversion relationship and flux according to claim 1, characterized in that: The data processing module is one of a data storage module and a data transmission module.

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