A seawall wave monitoring system

Abstract

The utility model discloses a kind of seawall overwave monitoring systems, belong to marine hydrology monitoring technical field.The system includes shore-based observation module, overwave monitoring module, wave monitoring cage, data receiving transmitter and cloud server, the shore-based observation module, overwave monitoring module, wave monitoring cage are connected with data receiving transmitter, the data receiving transmitter is connected with the cloud server.The utility model solves the problem that traditional seawall overwave actual measurement technique is difficult, low in accuracy, poor in timeliness, can be widely applied to sea embankment safety evaluation, marine disaster early warning and related scientific research work.

Description

Technical Field

[0001] This application relates to the field of marine hydrological monitoring technology, specifically to a seawall wave crossing monitoring system. Background Technology

[0002] The impact of waves on seawalls, especially the overtopping process, is a significant factor affecting the stability of seawalls and the safety of the environment behind them. It can lead to seawall breaches, farmland inundation, infrastructure damage, and loss of life and property. With global climate change, rising sea levels, and the increasing frequency of extreme weather events, wave overtopping has become more frequent and intense. The complexity and unpredictability of wave conditions further exacerbate the overtopping process, posing a greater threat to the safety of coastlines and marine structures.

[0003] Research on wave overtaking involves multiple disciplines, including fluid dynamics, ocean engineering, and meteorology. Through theoretical research, numerical simulations, and experimental observations, scientists and engineers attempt to understand and predict the mechanisms of wave overtaking in order to improve the design of seawalls and breakwaters and enhance their wave resistance. However, related research often lacks support from measured data on wind waves and their overtaking processes. Typically, monitoring stations focus on wave size, tide level, and wind conditions, making it difficult to measure the overtaking process in real time. Furthermore, seawalls are mostly located in low-lying or mid-high tide areas, and the wind and wave behavior in front of the seawall is relatively complex due to seawall reflections and water depth. Therefore, discussing overtaking at the seawall crest using numerical simulations or experimental observations has relatively low reliability.

[0004] Located on the southeastern coast of China, Zhejiang Province is severely threatened by strong typhoons and their accompanying storm surges and giant waves during the summer and autumn seasons. Due to the diversity of topography, sea conditions, and typhoon paths, the height, frequency, and energy distribution of overtopping waves exhibit significant regionality and uncertainty. Furthermore, in related seawall safety projects, the ecological construction of seawalls often alters the original seawall morphology, and the overtopping process varies among seawalls with different structural forms.

[0005] Therefore, the lack of measured data to elucidate the wave-overtaking behavior characteristics of seawalls has long hindered the provision of safe and accurate seawall crest elevations and toe erosion prevention recommendations for the Anlan Seawall. This has become a major problem restricting the development of seawall engineering. Conducting research on seawall wave-overtaking observation technology is of great significance for improving the flood control capacity of seawalls and optimizing their design and management. Utility Model Content

[0006] In view of this, the present invention provides a seawall wave overpass monitoring system, which can monitor the wave overpass process at the site in real time and obtain key data on seawall wave overpass under special hydrological conditions such as daily conditions or storm surges.

[0007] According to a first aspect of the embodiments of this application, a seawall wave overpass monitoring system is provided. The system includes a shore-based observation module, a wave overpass monitoring module, a wave monitoring cage, a data receiver and transmitter, and a cloud server. The shore-based observation module, the wave overpass monitoring module, and the wave monitoring cage are all connected to the data receiver and transmitter, and the data receiver and transmitter are connected to the cloud server.

[0008] The shore-based observation module includes a high-definition camera for observing wave morphology in front of the dike, wave overpass process and the stability of the revetment behind the dike.

[0009] The wave monitoring module includes a first pressure sensor for recording the thickness and impact pressure of the water flow at the location, a water collection device for collecting the wave water, and a second pressure sensor for measuring the water pressure in the wave measuring tank to count the wave volume.

[0010] The wave monitoring cage includes a cage frame for fixing to the toe of the dike or below the average low water level of the beach, and a high-precision tidal wave recorder for monitoring wave conditions.

[0011] Optionally, the shore-based observation module also includes a dike support rod, on which the high-definition camera is mounted.

[0012] Optionally, the high-definition camera is embedded in the rear support rod of the dike and housed in a waterproof housing equipped with a windshield wiper.

[0013] Optionally, several high-definition cameras are arranged from top to bottom on the support rods behind the dike, and the cameras are preset to monitor the sea conditions in front of the dike, the waves crossing the top of the dike, and the condition of the revetment behind the dike.

[0014] Optionally, the first pressure sensor is evenly distributed along the observation profile on the top of the embankment.

[0015] Optionally, the water collection device is arranged on the inner side of the top of the dike, and by presetting the tilt angle of the water collection device, the water collected by the device is concentrated in the water collection device.

[0016] Optionally, the second pressure sensor is arranged inside the water collection device.

[0017] Optionally, the water collection device is equipped with a drainage device. When the water level in the water collection device exceeds a certain limit, the drainage device will be activated to drain the water.

[0018] Optionally, the wave monitoring cage is placed below the average low tide level near the shore and fixed to the beach or the toe of the dike using pile foundations.

[0019] Optionally, a high-precision tidal wave recorder is installed inside the wave monitoring cage.

[0020] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0021] This invention provides a method for monitoring the wave-crossing process of seawalls in scientific research on seawall engineering. By using real-time video recordings, data from a first pressure sensor, a second pressure sensor, and a high-precision tidal wave recorder, it can provide more comprehensive and accurate wave-crossing measurement data. By comparing and analyzing the elements, it greatly improves the reliability of the relevant data.

[0022] The seawall wave overpass monitoring system of this utility model establishes a brand-new system for monitoring the wave overpass process of seawalls, and optimizes the problems of traditional seawall front wave monitoring systems that are difficult to measure wave overpass related data and have incomplete data.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] Figure 1 A framework diagram of a seawall wave monitoring system provided for an embodiment of this utility model.

[0026] Figure 2 A schematic diagram of the layout of the wave monitoring module provided in this embodiment of the utility model.

[0027] The attached figures are labeled as follows:

[0028] 1. Shore-based observation module; 11. Embankment support rods; 12. High-definition camera;

[0029] 2. Wave monitoring module; 21. First pressure sensor; 22. Water collection device; 23. Second pressure sensor; 221. Water collection frame; 222. Water collection tank; 223. Drain outlet;

[0030] 3. Wave monitoring cage; 31. Cage frame; 32. High-precision tidal wave recorder; 33. Current velocity sensor;

[0031] 4. Data receiver / transmitter; 41. Cable;

[0032] 5. Cloud server. Detailed Implementation

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0034] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0036] refer to Figures 1-2 This utility model provides a seawall wave overpass monitoring system. The system includes a shore-based observation module 1, a wave overpass monitoring module 2, a wave monitoring cage 3, a data receiver and transmitter 4, and a cloud server 5. The shore-based observation module 1, the wave overpass monitoring module 2, and the wave monitoring cage 3 are all connected to the data receiver and transmitter 4 via cables 41. The data receiver and transmitter 4 is connected to the cloud server 5.

[0037] The shore-based observation module 1 includes a high-definition camera 12 for observing the wave morphology in front of the dike, the wave overpass process, and the stability of the revetment behind the dike.

[0038] In one embodiment, the shore-based observation module 1 further includes a dike support rod 11, on which the high-definition camera 12 is mounted.

[0039] In one embodiment, considering that in stormy weather, low visibility, rain blurring the lens, and strong winds and rain can also damage the camera structure, the high-definition camera 12 is embedded in the embankment support rod 11 and placed in a waterproof housing equipped with a rain wiper.

[0040] The dike support rod 11 is made of ∅800 hollow pipe pile, with a ground length of about 10-20m, which meets the requirements for stability, camera installation and cable routing, and also meets the current wave monitoring requirements of the seawall.

[0041] The high-definition camera 12 is adjusted according to the actual layout in front of the seawall to meet the scene capture needs of different areas and has night vision function.

[0042] Furthermore, the HD camera 12 has an image resolution of approximately 1920*1080; the lens has 30x optical zoom and 10x digital zoom; the lens diameter is approximately 72mm, and the viewing angle is approximately 80° diagonally; it operates on 36V DC power; the HD camera 12 uses a high-definition wide-angle camera with night vision function; and it has electronically adjustable angle and zoom functions.

[0043] Furthermore, the high-definition camera 12 can be equipped with a pan-tilt unit, thereby allowing adjustment of the direction and angle of the high-definition camera 12.

[0044] The wave monitoring module 2 includes a first pressure sensor 21 for recording the thickness and impact pressure of the water flow at the location, a water collection device 22 for collecting the wave water, and a second pressure sensor 23 for measuring the water pressure in the wave measuring tank to count the wave volume.

[0045] In one embodiment, after selecting the wave monitoring area, a water collection device 22 for collecting wave water is set up in the area.

[0046] The water collection device 22 includes a water collection frame 221 with a preset tilt angle, a water collection tank 222 for measuring the amount of water flowing over the waves, and a drain outlet 223 for draining water.

[0047] Specifically, the water collection device 22 can be made of stainless steel or other waterproof materials and is installed in areas of the seawall where overtopping is frequent. The length and width of the water collection device 22 can be selected according to the common overtopping situations in the monitoring area and the size and form of the seawall. Generally, a length and width of 5 to 10 m are selected. The water collection device 22 can be preset with a certain tilt angle (usually around 5°) to ensure that the water can be collected into the water collection tank 222 on its own, which is convenient for the measurement of overtopping water volume.

[0048] Specifically, the water collection frame 221 is set on the top of the dike with a steel base to ensure that the structure can withstand the impact of the waves; the water collection frame 221 is preset with a certain inclination angle to encourage the water from the waves to collect into the water collection trough 222.

[0049] Furthermore, the water collection device 22 can collect the water from the waves into the water collection tank 222. The water collection tank 222 has a drain outlet 223 that can be actively opened / closed. The opening / closing of the drain outlet 223 can be remotely controlled by preset upper limit of water collection value of the water collection tank 222 or by cloud server 5.

[0050] Specifically, the drain outlet 223 can be equipped with a valve with a sensor or an automatic control module. When the water pressure in the water collection tank 222 exceeds the preset upper limit of water volume, the valve can be automatically opened to open the drain outlet and drain the water collection tank until it is empty or drained to the preset lower limit of water volume.

[0051] In one embodiment, a second pressure sensor 23 is disposed in a water collection tank 222 and is evenly distributed along the axis of the water collection tank to record the average water level in the water collection tank in order to count the amount of water flowing over the waves.

[0052] Specifically, 3-5 second pressure sensors 23 can be evenly arranged along the axis of the water collection tank. By calculating the average water level, a relatively stable and accurate water level height can be obtained, ensuring the reliability of the monitoring of the water volume. The opening / closing of the drain outlet 223 of the water collection tank can also be controlled according to the measured data of the second pressure sensor 23. If the water pressure measured by the second pressure sensor 23 exceeds a certain limit, that is, the water volume of the water collection tank exceeds the limit, the drain outlet will be opened to drain the water collection tank until it is empty or drained to the preset lower limit of water volume.

[0053] In one embodiment, the pressure sensors 21 are arranged in a uniform array within the monitoring area on the top of the dike to record the water flow thickness and the impact pressure of the overpass waves at that location.

[0054] Specifically, the pressure sensors 21 are evenly arrayed at the observation position on the top of the dike and fixed by a device. Each pressure sensor unit is 10cm×10cm, and one is installed at a interval of 10cm (which can be adjusted according to measurement needs). They are used to record the water flow thickness and the impact pressure of the overcurrent at that location. In order to ensure the comprehensiveness of the recorded wave train, the frequency of the pressure sensors is set to 4Hz to prevent missed measurements. In order to ensure the reliability of the data, a minimum threshold is set to prevent residual water or splashing water from the previous wave train from accidentally triggering the pressure sensors. The recorded data is transmitted to the cloud server 5 via the data receiver and transmitter 4. The overcurrent morphology and impact position can be discussed by statistically analyzing the pressure distribution in the area.

[0055] In one embodiment, the first pressure sensor 21 has a square grid drawn with reflective paint around its periphery for calibrating distance and improving the accuracy of wave overtopping monitoring.

[0056] Furthermore, a grid was drawn in the monitoring area on the top and back of the dike. A 0.5m*0.5m square grid was drawn around the sensor using a waterproof, colorfast, and reflective paint that is suitable for nighttime or dark weather. This facilitates data correction such as video data positioning in the later stages.

[0057] The wave monitoring cage 3 includes a cage frame 31 fixed below the average low water level of the dike toe or beach surface, and a high-precision tidal wave recorder 32 for monitoring wave conditions.

[0058] In one embodiment, the wave monitoring cage 3 includes a cage frame 31 fixed to the toe of the dike or below the average low water level of the beach.

[0059] Specifically, the wave cage frame 31 can be constructed of stainless steel, and the size of the data acquisition sensors to be installed as needed can be prefabricated, and waterproof and corrosion-proof measures can be taken.

[0060] Furthermore, the wave cage frame 31 needs to maximize the permeability of the frame while ensuring strength and stability, so as to prevent the frame from affecting the water flow and avoid deviations in the measured data.

[0061] In one embodiment, the wave monitoring cage 3 further includes a high-precision tidal wave recorder 32 for monitoring wave conditions, which can perform long-term observation of pressure and wave characteristics in nearshore shallow water areas as needed.

[0062] Specifically, the high-precision tidal recorder 32 can be an RBRduet3 TD|tide16 tide meter from RBR Corporation of Canada. It can perform simple and flexible measurement settings, obtain the average value of pressure readings over a long period of time, and provide accurate tide readings with a sampling rate of up to 16Hz. It can also obtain temperature values. At the same time, it can output data in Matlab, Excel, OceanDataView and TXT formats.

[0063] Furthermore, depending on the actual situation, the wave monitoring cage 3 can also be equipped with hydrological monitoring equipment such as a flow velocity sensor 33; the wave monitoring cage 3 can adopt multiple combined observation methods, and combine the measured data of the shore-based observation module 1 and the overpass monitoring module 2 to integrate, discuss and analyze wave characteristics and overpass process, thereby improving the reliability and completeness of overpass monitoring results.

[0064] In one embodiment, the sensor inside the wave monitoring cage 3 needs to have anti-fouling measures. A protective net that does not affect wave behavior can be set up to prevent the sensor probe from being attached or blocked by organisms, mud, sand, debris, etc., thereby reducing measurement errors and ensuring that the instrument values ​​are normal.

[0065] Furthermore, to facilitate the operation and maintenance of the monitoring system, each sensor should support on-site plug-and-play replacement and be able to be calibrated independently in the laboratory, with calibration parameters stored inside the probe, eliminating the need to calibrate the entire device.

[0066] Furthermore, the shore-based observation module 1, the overtopping monitoring module 2, and the wave monitoring cage 3 can be connected to the data receiver and transmitter 4 via data cable 41, and the sensor data can be wirelessly transmitted to the cloud server 5 in real time.

[0067] The data receiver transmitter 4 can use a 5G signal module to upload live video and measured data to the cloud server 5 via 5G network signal, so as to remotely view the relevant wave measurement data of the cloud server 5.

[0068] The method of using the seawall wave crossing monitoring system provided by this utility model is as follows:

[0069] Step 1: Determine the location of the seawall overtopping observation point and confirm that the observation conditions are good and the supporting facilities are complete. It should be ensured that the selected seawall front is not significantly obstructed, that the seawall overtopping phenomenon is frequent, and that the seawall structure has research value, so as to facilitate the study of a universally applicable seawall overtopping mechanism in later stages. The system should be built on a seawall near an existing hydrological station to confirm the completeness of nearshore hydrological data in the overtopping observation area, so as to facilitate the integration and research of subsequent measured data. Determine the measurement parameters required for the relevant research, ensuring that the sensor settings can effectively acquire relevant parameters and guarantee their accuracy.

[0070] Step 2: Set up the shore-based observation module 1, the overtopping monitoring module 2, the wave monitoring cage 3, and the data receiver and transmitter 4 in the selected area according to relevant requirements, calibrate the monitoring data of each sensor, and complete the construction of the overtopping monitoring system.

[0071] Step 3: Monitor the wave overpass process of the target seawall and return the data to the cloud server 5.

[0072] Step 4: Data processing and analysis are performed on the server to conduct subsequent research on the wave overtaking process.

[0073] As a preferred embodiment of this utility model, in step one, in addition to routine monitoring of daily working conditions, the observation time should be concentrated in the typhoon season each year, that is, from July to September each year, so as to monitor the overtopping process of strong typhoons and the accompanying storm surges and giant waves on the seawall project, and then study its related mechanisms.

[0074] Preferably, the monitoring system should be checked and calibrated before and after each typhoon or storm surge event to ensure the stability of the system's monitoring of overtopping waves under extreme conditions.

[0075] Preferably, the area surrounding the seawall should have long-term deep-water wave stations, nearshore tide gauge stations, and wind speed stations. The availability of deep-water stations capable of providing effective wave data is a fundamental requirement for site selection and forms the basis for addressing the seawall overtopping problem in the project—discussing the overtopping mechanisms of extreme waves such as storm surges. If long-term tide gauge and wind speed stations are nearby, project costs can be saved, and the tide data provided by these stations can verify the monitoring system's data. Furthermore, it can ensure the continuity of tide and wind speed data in front of the seawall under extreme weather conditions, preventing data interruptions due to instrument damage during observation.

[0076] Preferably, the selected seawall structure and its leading edge wave behavior are representative. Because the selected seawall section and its leading edge wave behavior can represent the characteristics of the seawall in the region, they can provide some answers to the long-standing problem of seawall overtopping, even with limited funds, time, and resources, and provide valuable experience for subsequent research and engineering implementation.

[0077] Preferably, the seawall should be free from significant obstructions and have complete supporting facilities in the surrounding area. The absence of significant obstructions along the selected seawall's front edge ensures the stability of the nearshore hydrological conditions in the selected area; the selected seawall should include a management building and be close to residential areas to ensure the safekeeping of wave observation equipment during normal times, convenience during observation, and the feasibility of providing living and emergency shelter for observation personnel; simultaneously, it should serve as the location of the control terminal for the intelligent hydrological system, ensuring the stability of data collection and retransmission for the monitoring system.

[0078] As a preferred embodiment of this utility model, in step two, corrosive materials are used to lay the pipe piles and wave cages to ensure their strength and increase their durability. In order to meet the requirements of the wave monitoring module in front of the pond, a grid is drawn on the top of the dike according to a certain pattern using reflective and corrosion-resistant paint to facilitate the monitoring of the wave crossing process.

[0079] Preferably, the wave cage frame 31 can be equipped with a protective net that does not affect wave behavior, preventing the sensor probe from being attached or blocked by organisms, mud, sand, debris, etc., reducing measurement errors and ensuring normal instrument values; to facilitate the operation and maintenance of the monitoring system, each sensor probe should support on-site plug-and-play replacement, and can be independently calibrated in the laboratory, with calibration parameters stored inside the probe, eliminating the need to calibrate the entire device.

[0080] Preferably, considering that most instruments are located in seawater or are subject to the impact of seawater, although the equipment has adopted certain anti-corrosion measures, it is still necessary to carry out necessary equipment debugging and instrument position correction before and after each typhoon to ensure the feasibility of long-term observation. In addition, the attachments and debris on the wave cage frame 31 protective net need to be cleaned regularly to ensure the safety of the equipment. The general maintenance procedure is to monitor the equipment weekly, calibrate the instruments and clean up debris monthly and before the typhoon, and calibrate the instruments, debug the equipment, and clean up debris after the typhoon.

[0081] Preferably, a suitable observation area is selected, a wave monitoring module 2 is constructed, and a water collection device 22 is fixed to the top of the dike in the target observation area using a device. The sensor spacing needs to be determined according to the actual dike cross-section, with an installation interval of approximately 10cm; for the dike top area, considering data verification, 1-2 locations need to be installed as needed. To ensure the comprehensiveness of the recorded wave train, the pressure sensor frequency is set to 4Hz to prevent missed measurements; to ensure data reliability, a threshold is set on the terminal to prevent residual water from the previous wave train or splash water from accidentally triggering the sensor.

[0082] As a preferred embodiment of this utility model, in step four, the development process and mechanism of seawall overtopping can be studied by combining relevant measured data from nearby hydrological stations under different hydrological conditions.

[0083] As can be seen from the above embodiments, this application has constructed a seawall wave monitoring system. By adopting a multi-sensor synchronous monitoring method, it effectively improves the measurement efficiency of the water conditions in front of the seawall, realizes the remote reading and cloud storage of measured data, and achieves the technical goals of multi-source acquisition, remote transmission, and long-term monitoring. At the same time, based on this seawall wave monitoring system, the stability of the equipment under extreme sea conditions such as typhoons is improved, providing reliable and comprehensive measured data support for studying the impact of extreme sea conditions on coastal water conditions.

[0084] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0085] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A seawall overtopping monitoring system, characterized by, The system comprises a shore-based observation module, a wave-over monitoring module, a wave monitoring cage, a data receiving transmitter and a cloud server, the shore-based observation module, the wave-over monitoring module and the wave monitoring cage are connected with the data receiving transmitter, and the data receiving transmitter is connected with the cloud server; wherein: The shore-based observation module comprises a high-definition camera for observing wave patterns in front of the dike, wave-over processes and stability of the revetment behind the dike; The wave-over monitoring module comprises a first pressure sensor for recording water flow thickness and impact pressure at the location, a water collecting device for collecting wave-over water, and a second pressure sensor for measuring water pressure in the wave-over measuring tank to count wave-over amount; The wave monitoring cage comprises a cage frame for being fixed below the average low water level of the dike foot or the beach, and a high-precision tide wave recorder for monitoring wave conditions.

2. The seawall overtopping monitoring system of claim 1, wherein, The shore-based observation module further comprises a post behind the dike, and the high-definition camera is installed on the post.

3. The seawall overtopping monitoring system of claim 2, wherein, The high-definition camera is embedded on the post behind the dike and placed in a waterproof housing provided with a rain wiper.

4. The seawall overtopping monitoring system of claim 2, wherein, A plurality of high-definition cameras are arranged from top to bottom on the post behind the dike, and the cameras are preset to monitor sea conditions in front of the dike, wave-over on the dike top and the state of the revetment behind the dike.

5. The seawall overtopping monitoring system of claim 1, wherein, The first pressure sensor is uniformly arranged along the observation profile on the dike top.

6. The seawall overtopping monitoring system of claim 1, wherein, The water collecting device is arranged inside the dike top, and by presetting the water collecting device inclination, it is ensured that the wave-over water collected by the device is concentrated in the water collecting device.

7. The seawall overtopping monitoring system of claim 1, wherein, The second pressure sensor is arranged in the water collecting device.

8. The seawall overtopping monitoring system of claim 6, wherein, A drainage device is arranged in the water collecting device, and when the water in the water collecting device exceeds a certain limit, the drainage device will be opened to perform drainage action.

9. The seawall overtopping monitoring system of claim 1, wherein, The wave monitoring cage is placed below the average low tide level near the shore and is fixed to the beach or the dike foot by pile foundation.

10. The seawall overtopping monitoring system of claim 1, wherein, The high-precision tide wave recorder is arranged in the wave monitoring cage.

Images