36 results about "Tide gauge" patented technology

The invention relates to a tide level obtaining method and system based on an OWC wave energy conversion device. The method comprises the following steps: constructing an energy loss prediction model in the air chamber; acquiring field incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and pneumatic output energy at the current time period; inputting incident wave energy and reflected wave energy into the model to obtain predicted energy loss; and the tide level variation is solved based on the energy conservation relational expression, and the current tide level is calculated. The system comprises an energy loss prediction module, a wave energy acquisition module, a water body energy acquisition module, a pneumatic output acquisition module, an energy loss calculation module, a tide energy solving module and a tide level calculation module, which cooperatively realize the method. According to the scheme, an external tide gauge station is not needed, the local sea area tide level can be inversed in situ, at high frequency and with high precision, the method is suitable for an OWC-breakwater fusion scene, and cooperative operation of a port and ocean energy is supported.

The invention relates to the technical field of offshore wind plant area marine environment monitoring, and discloses an offshore wind plant wide-area environment panoramic sensing method and system, and the method comprises the steps: S1, laying seabed bottom type comprehensive observation equipment and low-altitude meteorological observation equipment in a target area of an offshore wind plant; the seabed bottom type comprehensive observation equipment comprises an acoustic Doppler flow velocity profiler, a tide gauge and a temperature-salinity-depth instrument; the low-altitude meteorological observation equipment comprises a meteorological station and a wind measuring radar; s2, collecting field data through the seabed bottom type comprehensive observation equipment and the low-altitude meteorological observation equipment, collecting remote sensing data through the meteorological remote sensing satellite, performing inversion on the remote sensing data to obtain remote sensing inversion data, and transmitting the field data and the remote sensing inversion data to a software processing platform and the like; according to the method and the system, collaborative acquisition, precise processing and fusion prediction of air-sky-sea multi-dimensional data can be realized, and the comprehensiveness and the accuracy of offshore wind plant environment perception are improved.

The invention provides an immersed tube joint sinking butt joint underwater space positioning system and method. The immersed tube joint sinking butt joint underwater space positioning system comprises a clinometer, a mobile station group, a tide gauge, a multi-beam sonar and a monitoring data analysis and display module. The inclinometer obtains bidirectional dip angle monitoring data of the immersed tube joint; the mobile station group obtains coordinate monitoring data of positions where the mobile stations are located respectively; the tide level meter obtains tide level monitoring data in the pipe joint sinking and butt joint period; the multi-beam sonar obtains the terrain data of the underwater foundation trench in the pipe joint sinking and docking area; the monitoring data analysis and display module obtains feature point coordinates, pipe joint postures and early warning index data on a to-be-immersed pipe joint according to the inclinometer monitoring data, the mobile station group monitoring data, the tide level data, the multi-beam underwater topographic data and the immersed pipe joint coordinate data.

A self-contained tide gauge with positioning and data remote transmission function, including shell and pressure sensor, data acquisition and processing unit, storage unit, Beidou positioning communication unit and power supply unit arranged in the shell, the data acquisition and processing unit includes signal conversion device and signal amplifier, the signal conversion device is electrically connected with the pressure sensor, the signal amplifier is electrically connected with the signal conversion device, the storage unit is electrically connected with the signal amplifier, the Beidou positioning communication unit receives Beidou navigation satellite signal to realize positioning, and transmits positioning data and pressure data to the onshore control end through Beidou short message service, and the power supply unit is electrically connected with other components.The utility model discloses through increasing Beidou communication module, through Beidou short message to the onshore control end position information of self-contained tide gauge is sent in time and the tide level data of continuous back transmission acquisition is guaranteed, and the abnormality such as the instrument can be timely and effectively recovered after being fished out of water by fishing net and so on the tide data of acquisition is verified.

The present invention discloses a method for predicting extreme values ​​of coastal tide levels, comprising the following steps: obtaining several years of historical data measured by a tide gauge at a location, determining the maximum sample value every X hours, and forming independent tide level analysis data. The selected tide level analysis data is subjected to extreme value mixed distribution family parameter fitting, and the extreme value mixed distribution with the highest negative logarithmic fit is calculated and parameter values ​​are determined. The coastal tide level value under a specific return period is calculated based on the obtained optimal extreme value mixed distribution form. The method selects an extreme value mixed distribution, calculates extreme values ​​under a specific return period, uses a generalized Pareto distribution as a tail and splices it with other distributions, uses a threshold as part of a distribution parameter, and automatically selects the optimal threshold. This method avoids the empirical and subjective nature of threshold selection in traditional super-threshold extreme value analysis, and fully considers the integrity of the analysis data, providing a more reliable numerical reference for structural design and disaster prevention.

The present application relates to the technical field of offshore wind farm area marine environment monitoring, and discloses a kind of offshore wind farm wide area environment panoramic perception method and system, comprising: S1, in the target area of offshore wind farm layout seabed bottom type comprehensive observation equipment and low-altitude meteorological observation equipment;The seabed bottom type comprehensive observation equipment includes acoustic Doppler current profiler, tide gauge, temperature salinity depth instrument, and the low-altitude meteorological observation equipment includes weather station, wind radar;S2, through seabed bottom type comprehensive observation equipment, low-altitude meteorological observation equipment acquisition field data, through meteorological remote sensing satellite acquisition remote sensing data, remote sensing data is inverted to obtain remote sensing inversion data, and field data and remote sensing inversion data are transmitted to software processing platform etc.;The method and system can realize the collaborative collection of space-time-sea multidimensional data, accurate processing and fusion prediction, improve the comprehensiveness and accuracy of offshore wind farm environment perception.

The application provides a marine engineering water surveying device with positioning function, and relates to the field of water surveying.The marine engineering water surveying device with positioning function comprises a ship body, the inside of the ship body is fixedly connected with a supporting pipe, and the inside of the supporting pipe is provided with a lithium battery.The marine engineering water surveying device with positioning function is composed of a surveying device formed by cooperation of a transmitting transducer, a receiving transducer, an ultrasonic Doppler flowmeter, a tide gauge, a forward and reverse motor, a rotating plate, a temperature sensor, a pressure sensor and a main machine, basic hydrological information of the sea bottom, the shallow layer and the sea surface is collected, the marine hydrological information is collected and surveyed in a three-dimensional surveying mode, and the information collection is ensured to be effective.The GPS positioning device installed on the supporting rod regularly sends positioning information to the main machine and the shore, the position of the staff is ensured to be known by the staff on the shore, and the safety of the staff in the ship body is ensured.

The invention relates to tide gauge equipment based on Beidou No.3 short message data transmission, and relates to the technical field of tide survey, the tide gauge equipment comprises a base placed at the water bottom, a water pressure type water level gauge is installed on the base, the water pressure type water level gauge is connected with a communication cable, a floating ball is arranged at one end, away from the water pressure type water level gauge, of the communication cable, and the floating ball floats on the water surface; a float-type water level gauge is installed on the floating ball, a tide level processing system and a Beidou No.3 short message transmission system are installed in the floating ball, a communication cable is inserted into the floating ball to be connected with the tide level processing system, and the tide level processing system is electrically connected with the float-type water level gauge and the Beidou No.3 short message transmission system through cables. The water pressure type water level gauge and the float type water level gauge transmit data through different detection modes respectively, error values are reduced by analyzing the two sets of data, when the water pressure type water level gauge needs to be calibrated, the data of the water pressure type water level gauge are calibrated through the data of the float type water level gauge, and the effect of facilitating real-time transmission of monitored data is achieved.

The invention relates to the technical field of marine surveying and mapping, in particular to a multi-station water level linear interpolation method and system considering the tidal propagation direction. The method comprises the steps of obtaining synchronous water level observation data of a plurality of tide stations; on the basis of the synchronous water level observation data, calculating the tide time difference between every two stations in the tide gauge stations; determining the propagation direction of the tide in the area where the tide stations are located according to the tide time difference relation and the position coordinates of the tide stations; on the basis of the tide propagation direction, tide direction projection corrections of the water level point to be solved relative to at least two known water level points are calculated; and utilizing the tide direction projection correction and the water level value of the known water level point to obtain water level data of the to-be-solved water level point through linear interpolation calculation. According to the method, while the advantage of high calculation efficiency of a linear interpolation method is maintained, the water level calculation precision and reliability in a complex tide propagation environment are remarkably improved, and thus the universality of the method is enhanced.

The invention discloses an absolute sea surface elevation measurement system based on an offshore mobile platform, which relates to the field of marine surveying and mapping and satellite remote sensing calibration and comprises an offshore mobile platform part, a shore-based static GNSS (Global Navigation Satellite System) base station and a data processing module, the offshore mobile platform part is integrated with a GNSS antenna and receiver, an attitude sensor, a radar tide gauge and a data acquisition and storage module; the shore-based static GNSS base station provides static coordinates and GNSS observation data, and the data processing module comprises a shore-based base station resolving module for resolving to obtain three-dimensional coordinates; the offshore platform GNSS dynamic resolving module is used for resolving a dynamic position; and the absolute sea surface height calculation module is used for calculating the initial sea surface height and outputting a final result through low-pass or median filtering. The device does not need to distribute a buoy, can be directly carried on a ship, a floating platform and other mobile platforms, realizes high-precision, continuous and safe absolute sea surface elevation measurement, and is suitable for satellite altimeter calibration and other application scenes.

The invention discloses an intelligent salty-avoiding dredging system and method for an estuary reservoir. The intelligent salty-avoiding dredging system comprises a reservoir defined by an external dam and an internal dam, a reservoir gate, a silt flushing gate, a front flushing nozzle array, a flow guide groove, a plurality of rotatable sills and a monitoring control unit. The external dam is provided with an overflow weir matched with the average high tide level, and the monitoring control unit comprises a sonar detector, a water level sensor, a conductivity sensor, a tide level meter and a control module. Water is stored during flood tide, and saline water is intercepted through the sill; when the tide level is low, the bottom sill is controlled to rotate to achieve seawater directional silt flushing, and silt is discharged to the deep sea through the flow guide groove and the desilting gallery; when the water level of the reservoir drops to a threshold value, slightly opening a reservoir gate to form a salt-pressing flow field, and adjusting the opening degree of the gate through water conductivity to replace salt water; and after replacement is completed, the sluice gate is closed firstly, then the reservoir gate is closed, and salt tide blocking is achieved. Tidal energy is used for saving water and energy, the silt washing efficiency is improved through directional diversion of the sill, intelligent regulation and control are achieved in the whole process, the salt avoiding effect is good, and water consumption for dredging is low.

The utility model belongs to the technical field of tide level instruments, and particularly relates to a tide level instrument protection device for marine surveying and mapping, which comprises an outer protection cover, a flow guide plate is fixedly connected to the upper side of the outer surface of the outer protection cover, and a spiral groove is formed in the lower side of the outer surface of the outer protection cover; the flow guide plates can change the water flow direction, reduce the front impact area and guide marine organisms to slide off along the slopes, the spiral grooves can induce water flow to form axial flow, destroy water flow continuity, decompose large vortexes into small-scale turbulent flow and reduce wave resistance, and therefore the transverse swing amplitude of the buoy is reduced, and the service life of the buoy is prolonged. A honeycomb structure in the honeycomb composite buffer plate provides rigid support, energy is absorbed through plastic deformation during collision, the damper buffers the impact force transmitted into the fixing rod again, and therefore under the cooperation of the flow guide plate, the spiral groove, the honeycomb composite buffer plate and the damper, the impact force buffering strength of the protection device is improved, and the service life of the protection device is prolonged. And therefore, the protection effect on the tide level meter is improved.

The application discloses a kind of tidal flat micro wave tide gauge fixing device, belong to marine monitoring equipment technical field, including anchor rod, anchor rod is hollow structure, for installing wave tide gauge;The first end of anchor rod is provided with spiral anchor rod, for anchoring anchor rod in tidal flat argillaceous, to improve the anti-overturning ability;The second end of anchor rod is provided with range finding auxiliary structure for assisting range finder to carry out wave tide gauge distance measurement;Handle is detachably arranged on the second end of anchor rod;Support base is fixedly arranged on the outer periphery of anchor rod and is located above spiral anchor rod;Height measuring structure is inserted into the inside of anchor rod, for measuring the elevation of wave tide gauge installation position.The application can be stably fixed in soft tidal flat argillaceous by the combination of wide base with through slot and anchoring structure, to prevent equipment from tilting or sinking.

The invention relates to the technical field of submarine topography surveying and mapping, and discloses a submarine topography elevation measurement method and device, electronic equipment and a storage medium. The method comprises the following steps: determining a fixed reference difference, namely a first reference difference, between a first geoid and a second geoid according to monitoring data of a tide gauge station; calculating the reference difference between a second geoid and a reference ellipsoid at a plurality of positions of the engineering area, i.e., a second reference difference, and solving a comprehensive reference difference through a fitting mode; and finally, calculating a submarine topography elevation value taking the first geoid as the benchmark at the target position by combining the water depth at the target position and the sea water surface elevation value taking the reference ellipsoid as the benchmark. The deployment problem caused by severe sea conditions and complex submarine topography is avoided, the equipment cost is reduced, and the surveying and mapping efficiency is improved.

The application provides a tide gauge mounting and fixing device, and relates to the technical field of tide gauge mounting racks. The device comprises a fixing frame, which comprises a bottom frame and a top frame. The top frame is located at the middle part of the upper end of the bottom frame, and the two are fixedly connected through four groups of connecting columns. A mesh leakage plate is arranged at the middle part of the inner side of the bottom frame. An installation plate is arranged at the middle part of the bottom end of the top frame. The installation plate is located between the bottom frame and the top frame and at the middle part of the upper end of the mesh leakage plate. A limiting assembly comprises four groups of positioning nails, which are arranged at the bottom end of the bottom frame. The limiting assembly further comprises a ground anchor. The fixing frame is arranged in an integrated four-prism-taiprism structure and cooperates with the limiting assembly. In use, the positioning nails are pressed into the ground of the water bottom, thereby limiting and fixing the fixing frame. The ground anchor can further enhance the stability of the fixing frame installed in the water bottom, thereby effectively enhancing the stability of the tide gauge when used in the water bottom.

The invention discloses a precise positioning and depth control method for underwater drilling blasting, relates to the technical field of underwater blasting, and aims to effectively control blast hole positioning deviation through data real-time linkage calibration, collect water level data through double-source cooperation of an automatic moisture indicator and a water level pressure sensor, eliminate interference and ensure data precision. An intelligent ultra-deep value decision-making model based on machine learning is constructed, historical engineering data and current actual measurement parameters are combined, an optimal ultra-deep value is automatically output, and in the trial explosion optimization stage, an optimal parameter combination is formed by monitoring the vibration speed and observing the explosion effect and optimizing the explosion parameters; a layered charging structure and a hole-by-hole delay detonating network are adopted, the maximum single-section detonating explosive amount is hierarchically controlled according to the distance of a protected object, vibration and shock wave data are continuously monitored in the blasting process, and parameters are adjusted immediately when the data exceed the standard; and the data is fed back to the intelligent model to complete iterative optimization, so that more accurate parameter support is provided for subsequent blasting.

The invention discloses an on-site automatic comparison and measurement method and device for tide observation equipment based on a standard tide gauge well, and relates to the field of tide observation, and the method comprises the steps: obtaining and analyzing an in-well water gauge image sequence, and determining an in-well tide observation element data sequence; and acquiring and analyzing a sea surface distance data sequence outside the well to determine a tide observation element data sequence outside the well, and performing field automatic comparison and measurement on observation data of the tide observation equipment in combination with the tide observation element data sequence observed by the tide observation equipment and tidal time data recorded by the timer. According to the method, the long-term and real-time tidal observation element data sequence inside and outside the well is obtained by collecting the water gauge image sequence inside the well and the sea surface distance data sequence outside the well, field automatic comparison and measurement of observation data of tidal observation equipment can be achieved, and the problems existing in regular fixed-point manual comparison and measurement of observers are solved.

This invention provides a method for predicting water levels at multiple tide gauge stations during typhoons based on a dynamic attention graph cyclic network, comprising the following steps: acquiring water level data and meteorological data from multiple tide gauge stations during a typhoon; performing time-series feature processing on the acquired water level and meteorological data and creating a topology; defining a dynamic graph attention hierarchical aggregation network model structure and constructing a dynamic attention graph cyclic network model; training and optimizing the dynamic attention graph cyclic network model using the processed data and graph topology; and using the optimized dynamic attention graph cyclic network model to predict the water levels at multiple tide gauge stations along the coast in real time for the next A hours during a typhoon. This method effectively balances prediction accuracy and computational efficiency, solving the problems of insufficient prediction accuracy and wasted computing power.

The invention discloses a tide checking method and device for a high-voltage cable, a storage medium and electronic equipment. The method relates to the field of cables, and comprises the steps that gas information of target gas is obtained, the target gas refers to gas in a sheath buffer layer of the high-voltage cable, and the gas information comprises at least one of gas temperature information and gas component information; the gas information is processed through a humidity detection model, a detection result is obtained, and the detection result represents a humidity index corresponding to the sheath buffer layer; and determining whether the high-voltage cable is damped based on the detection result. According to the invention, the problem that the accuracy is low when the tide gauge is carried out on the high-voltage cable in the prior art is solved.

The invention discloses a mud flat miniature wave tide instrument fixing device, which belongs to the technical field of ocean monitoring equipment, and comprises an anchor rod which is of a hollow structure and is used for mounting a wave tide instrument; a spiral anchor rod is arranged at the first end of the anchor rod and is used for anchoring the anchor rod in mudflat mud so as to improve the anti-overturning capability; the second end of the anchor rod is provided with a distance measuring auxiliary structure used for assisting the distance measuring instrument in measuring the distance between the wave tide instruments. The handle is detachably arranged at the second end of the anchor rod; the supporting base is fixedly arranged on the periphery of the anchor rod and located above the spiral anchor rod. The height measuring structure is inserted into the anchor rod and used for measuring the elevation of the installation position of the wave tide instrument. Through the combination of the wide and large base with the through groove and the anchoring structure, stable fixation can be achieved in soft mud flat mud, and equipment is prevented from inclining or sinking.

The utility model relates to the technical field of tide water level detection, in particular to a water lower limiting device for a tide gauge, which comprises a steel frame, a protective cylinder for placing the tide gauge is arranged on the steel frame, and a protective cover for blocking the protective cylinder is detachably arranged on the protective cylinder. Water inlet holes used for being communicated with the outside are formed in the side wall of the protection barrel in a circumferential array mode, the steel frame provides a stable supporting structure, the steel frame can resist water flow impact, and the whole device is prevented from being washed away by water flow; the protective cylinder can fix the position of the tide gauge and can protect the tide gauge from being collided and damaged by sundries in water, and meanwhile the protective cover is arranged so that workers can block the protective cylinder conveniently. The water level in the protective cylinder is kept consistent with the outside by means of the circumferential array arrangement of the water inlet holes, and normal work of the tide gauge is not affected while the accuracy of the tide gauge for measuring the tide water level is ensured.

The invention relates to a raking device construction monitoring system and monitoring method. The monitoring system comprises a sensor module, a data collecting and processing unit, a monitoring computer and monitoring software. The sensor module comprises a winch steel wire rope encoder, a tail cable steel wire rope angle sensor and a raking device depth sensor; the monitoring system integrates signals of a mother ship GPS, an AIS, a tide level instrument and a draught sensor, and solves and displays the underwater three-dimensional position, the construction track and the working state of the raking device in real time by combining an electronic chart. According to the invention, accurate guidance and visual monitoring of raking operation can be realized, repeated or invalid construction is effectively avoided, and the operation efficiency and the resource utilization rate are remarkably improved.

The invention relates to the technical field of ocean engineering monitoring, and discloses an offshore wind plant meteorological and hydrological monitoring multi-mode power supply-communication integrated system, which comprises an underwater unit, a water surface unit and a shore-based monitoring platform, and is characterized in that data communication between the water surface unit and the shore-based monitoring platform is realized through a 4G module and a Beidou satellite; the underwater unit comprises an ADCP, a tide level meter, a noise measuring instrument, a direct-current stabilized power supply, a control circuit, a first acoustic communication machine and a water outlet alarm device. The direct-current stabilized power supply is respectively connected with the ADCP, the tide level meter, the noise measuring instrument, the control circuit, the first acoustic communication machine and the water outlet alarm device; the control circuit is connected with the ADCP, the tide level meter, the noise measuring instrument, the first acoustic communication machine, the water outlet alarm device and the like. The system can realize continuous real-time low-delay monitoring of meteorological and hydrological parameters of the offshore wind plant.

The utility model relates to the technical field of marine environment monitoring equipment, in particular to a combined type tide gauge well which comprises a first tide gauge well and a second tide gauge well, a pressure type tide level instrument and a floating water quality instrument are arranged on the first tide gauge well, a support is arranged on the second tide gauge well, a radar tide level instrument is arranged on the support, and the radar tide level instrument is connected with the first tide gauge well and the second tide gauge well. The radar tide level instrument faces the water surface; and the edge of the second tide gauge well is also provided with a roller. The combined type tide gauge well has the advantages that the combined type tide gauge well comprises the first tide gauge well and the second tide gauge well, the floating water quality meter and the pressure type tide level meter are arranged on the first tide gauge well, and the water quality meter and the pressure type tide level meter are arranged on the first tide gauge well at the same time, so that the detection efficiency is improved; and more ocean data can be obtained at the same time.

The invention provides a support for fixing instruments and equipment on the seabed. The support is used for fixing and installing tide gauge equipment for ocean survey. The device is made of a titanium alloy or aluminum alloy material, the whole device is of a regular triangular pyramid structure design, internal devices are protected, a connecting cable is arranged at the top, and unmanned recovery hooking configuration is achieved; and the iron counterweight is used for fishing by adopting a magnetic device under an unexpected condition. The device has the characteristics of being stable in structure, convenient to disassemble, assemble and transport, reusable, firm, durable, anti-rust, stable, easy to recycle and convenient and easy to use.

1. The name of the design product: tide station. 2. The use of the design product: the design product is used for observing the local sea water tide level change rule, including calculating the tide level harmonic constant, the average sea level depth datum, and providing the tide level forecast. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view. 5. The unusual surface, omit the top view.

The present invention discloses a method for calculating depth reference epochs based on GNSS and satellite altimetry, which belongs to the field of marine surveying and mapping technology. The method is used for calculating depth references, including data processing of a time series of vertical crustal deformation, calculating the linear rate of vertical crustal deformation, and data processing of a time series of absolute sea level height to obtain the rate of change of absolute sea level height; calculating a depth reference value based on tide gauge data, performing epoch reduction on the depth reference value, and verifying the epoch reduction results. The present invention more comprehensively captures the dynamic characteristics of vertical crustal deformation and absolute sea level height changes; on a long-term time scale, it can more accurately reflect the trend of sea level height changes; provides a new theoretical basis for depth reference epoch reduction, dynamically adjusts the depth reference value, avoids the problem of reference surface drift caused by sea level changes and crustal movement, and thus ensures the long-term stability and scientific nature of the depth reference.

The utility model belongs to the field of ocean surveying and mapping technology especially relates to a frame for nearshore fixed self -contained tide gauge, include: frame main part, be provided with the float ball for marking instrument position on the frame main part, the frame main part is pyramid structure, just the fixed piece for reinforcing frame main part is arranged every side's inner perimeter of frame main part, the inner chamber bottom of frame main part is fixedly connected with the sleeve for installing tide gauge, the bottom of frame main part is provided with the counterweight of preventing frame main part position, compared with prior art, the utility model has improved the structural strength and anti -deformation ability of frame main part, makes it can resist the impact of nearshore wind and current, ensures that is not easy to be damaged under the harsh environment, avoids the corrosion problem caused by traditional bolt direct contact with seawater, prolongs the service life of equipment.

The invention discloses a shoal tide level station laying device and an auxiliary installation system thereof. The shoal tide level station laying device comprises a hollow spiral pipeline and a fixing frame fixedly connected with the top of the spiral pipeline. A sludge inlet is formed in the bottom of the pipeline, an exhaust port is formed in the top of the pipeline, and the exhaust port exhausts air when sludge enters the sludge inlet; the fixing frame is used for installing a tide gauge; the radius of the device is gradually reduced from bottom to top, and the device is rotationally mounted on a shoal through an auxiliary mounting system. According to the structural design of the device, the construction difficulty is greatly reduced, the device can be directly installed on a mud beach and can be recycled, the settling volume of the tide gauge is reduced, and the damage risk and the detection error are reduced.

The invention provides an airborne laser radar-based tide-gauge-free pelagic water depth calculation method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining laser point cloud data of a to-be-measured sea area, carrying out the preprocessing and classification of the laser point cloud data of the to-be-measured sea area, and obtaining the laser point cloud data of the to-be-measured sea area; outputting submarine topography geodetic high point cloud data under the earth ellipsoid reference; dTU21 global average sea surface model data are obtained, and average sea surface geodetic height data of the sea area to be measured are obtained through interpolation; determining a depth reference plane L value of the sea area to be measured; the water depth value is calculated according to the submarine topography geodetic high point cloud data, the average sea surface geodetic height data and the depth reference surface L value, model transmission errors are reduced, dependence on a tide gauge station is avoided, seamless splicing of water depths between different sea areas can be achieved, the tide gauge station does not need to be erected in an open sea area, and the cost is reduced. And the implementation difficulty and cost of airborne laser water depth measurement are greatly reduced.