25 results about "Tide level" patented technology

The application discloses a kind of short-term prediction methods of high tide flood in coastal areas based on probability statistics. Including: obtaining the historical hourly water level observation data of target coastal area tide station and preprocessing;Climate state probability distribution model is constructed, and corresponding climate state distribution parameters are obtained;Decay persistence prediction model is constructed, and the observation abnormal value of future month is calculated according to the current month observation abnormal value;The climate state distribution parameters are adjusted by the observation abnormal value of future month;The daily cumulative flood probability is calculated based on the adjusted climate state distribution parameters;Daily cumulative flood probability is calculated day by day, and the high tide flood probability sequence of coastal cities in future several months is obtained, the warning probability threshold is set, and the date higher than the warning probability threshold in high tide flood probability sequence is marked as high tide flood high risk day.The high tide flood prediction of the application is more in line with the needs of disaster risk assessment, has more information, and can provide seasonal scale prediction, leaving time for medium and long term planning and emergency preparation.

This application discloses a method, system, and electronic equipment for guiding vessels through an immersed tunnel area in a port area, relating to the field of vessel management in port waters. The method includes: triggering vessel identification based on an electronic fence; determining the target vessel to enter the electronic fence area; determining the vessel's navigation path based on scheduling plan information; estimating the time interval for the target vessel to pass through the immersed tunnel area; acquiring tidal level data of the immersed tunnel area; and calculating the passage window period for passing through the immersed tunnel area based on the tidal level data; comparing the time interval for passing through the immersed tunnel area with the passage window period; and determining the time period for the vessel to pass through the immersed tunnel area based on the comparison results; and generating passage guidance information for the vessel during its passage through the immersed tunnel area based on real-time tidal height data during the passage period. This application solves the technical problem in related technologies where only vague prompts are provided for vessels with passage risks in immersed tunnel areas, resulting in low vessel passage efficiency.

This application discloses a method and system for assessing extreme environmental conditions in coastal engineering, relating to the fields of marine and coastal engineering technology. The method includes: establishing wave propagation deformation conversion relationships; performing quality control on multi-source wave-tide data; performing tidal level decomposition on the total water level time series; identifying multiple independent extreme wave-tide coupling events, extracting characteristic parameters to form a multi-dimensional extreme sample set, and establishing a joint distribution model; determining the target probability level and constructing an environmental profile with equal exceedance probabilities; selecting representative combined operating conditions, and using the wave propagation deformation conversion relationships to convert the representative combined operating conditions to nearshore control points to obtain design wave elements. This application, driven by multi-source wave-tide data, establishes a joint distribution model of wave height, period, and tidal level and constructs an environmental profile with equal exceedance probabilities, achieving quantitative determination of extreme design wave conditions with clear joint probability meanings, thus improving the scientific and economical nature of coastal engineering design.

The present application belongs to the technical field of ocean wave power generation, and particularly relates to a quick detachable and mounted OWC pneumatic structure, which comprises a bottom-opened rectangular air chamber, the side wall of the air chamber is provided with an embedded sliding groove matched with the wharf track, the top is provided with a valve structure, the valve structure realizes three working modes of complete closure, bidirectional conduction and only downward conduction through the cooperative action of the fixed valve piece, the moving valve piece stator and the moving valve piece flap, the air chamber can realize self-adaptive adjustment of the tidal level and quick disassembly preparation through controlling the valve mode and matching the sliding groove sliding along the track combined with the locking mechanism. The present application solves the problems of inconvenient disassembly and inability to adapt to the change of tidal level of the existing mounted OWC device, has the advantages of flexible deployment, convenient maintenance and stable energy efficiency, and is suitable for the green transformation of the existing port.

The application discloses a kind of quantitative tidal river section pollutant flux analysis method, comprising the following steps: S1, the equation of concentration variation of pollutant is established;S2, the water flux equation of river section at the time period to be studied is established;S3, based on water flux equation and the equation of concentration variation of pollutant at the section, the pollutant flux equation of river section at the time period to be studied is established;According to the pollutant flux equation, the hourly flux of pollutant at the section at the time period to be studied is calculated.The application can calculate the hourly variation process of pollutant concentration which sufficiently reflects the concentration oscillation caused by reciprocating flow by inputting tidal level and limited concentration data into the equation of concentration variation of pollutant, and based on the hourly variation data of pollutant concentration, the pollutant flux at the section at a certain time period in the future can be calculated hourly according to the pollutant flux equation, and finally the total pollutant flux at the section per day can be counted, which provides scientific support for water safety decision-making of city managers.

This invention discloses a method for estimating long-duration design tidal process lines, comprising: preprocessing and frequency analysis of historical tidal data to obtain the design high tide level, design flood tide range, and design ebb tide range; selecting a typical long-duration tidal process containing the highest tide level, and selecting a "one flood, one ebb" process at a later position as the main tidal type according to the principle of "high tide level - long duration - later high tide level", with the rest being secondary tidal types; using the design high tide level, design flood tide range, and design ebb tide range to perform same-frequency combination design on the main tidal type to obtain the design main tidal type process; using the scaling ratio of the corresponding phase points of the design main tidal type and the measured main tidal type as a benchmark, scaling the secondary tidal types accordingly to obtain the design secondary tidal type processes; and splicing the results to obtain the complete long-duration design tidal process. This invention overcomes the limitation of existing methods that can only deduce "one flood, one ebb" processes and is applicable to the calculation of any long-duration design tidal process.

The application discloses a hydrological forecasting technical field and relates to an estuary gate discharge period water level forecasting method based on a T_TIDE and MTR hybrid model, which comprises the following steps: collecting astronomical tide forecasting water level at a target time, real-time monitoring or forecasting gate dam discharge and upstream flow, inputting a pre-constructed T_TIDE and MTR hybrid model, and obtaining a final water level forecasting value; and the construction process of the T_TIDE and MTR hybrid model comprises the following steps: obtaining historical long-sequence tidal level data of a target region, using a T_TIDE model to calculate the astronomical tide forecasting water level at the target time, taking the astronomical tide forecasting water level, historical gate dam discharge and upstream flow as forecasting factors, and determining threshold variables; using a K-means clustering algorithm and combining AIC / BIC criteria to determine an optimal threshold segment number and threshold value, and constructing an MTR model; obtaining an initial T_TIDE and MTR hybrid model, calibrating and verifying the initial T_TIDE and MTR hybrid model according to historical tidal level data, and obtaining a final T_TIDE and MTR hybrid model. The application improves the precision, stability and timeliness of the estuary water level forecasting during the discharge period.

The application discloses a design water level calculation method and device for an unobserved sea area. The method comprises the following steps: acquiring measured data of a marine station adjacent to a target unobserved sea area, wherein the measured data of the marine station comprises a measured mean tidal range and a measured design water level; constructing a correction formula according to the measured data of the marine station, wherein the correction formula comprises a corresponding relationship between the mean tidal range and the design water level; training a numerical model with a tide level simulation function by using the measured data of the marine station to obtain a calibration model; calculating a simulated mean tidal range by using the calibration model; and obtaining a design water level of the target sea area according to the simulated mean tidal range and the correction formula. The design water level calculation method and device for the unobserved sea area can accurately calculate the design water level of the unobserved sea area, and have high flexibility and applicability, and can adapt to different sea area engineering layout requirements.

The application discloses a cofferdam lowering and pile cap pouring construction method and a cofferdam lowering construction device. The construction method comprises the following steps: monitoring the real-time tide level of the water area where the cofferdam is located; when the monitored tide level is smaller than a preset tide level, installing a cofferdam assembling platform, assembling the cofferdam on the cofferdam assembling platform, and assembling a bottom compartment at the bottom of the cofferdam; opening the inner-outer communication hole and the inner wall communication hole; when the monitored tide level is greater than the preset tide level, lowering the cofferdam to a self-floating state of the cofferdam through a hoisting system; when the monitored tide level is smaller than the preset tide level, lowering the cofferdam to a preset position by using the scouring force generated under the condition of the reciprocating flow flow rate of the large water area and through the hoisting system; performing bottom sealing construction at the bottom of the cofferdam; after the bottom sealing concrete reaches a preset strength, closing the inner-outer communication hole, opening the inner wall communication hole, pumping out the water in the cofferdam, and pouring the pile cap. The application can reduce the construction cost and improve the construction stability of the cofferdam lowering and pile cap pouring.

The application discloses a kind of tidal level data processing method, device, equipment, medium and product, apply in marine surveying and mapping technical field, the method includes: by acquiring satellite navigation receiving equipment in ship gathers tidal level data observation value and camera in the ship gathers image data, and according to the image data, determine the attitude angle of the ship, according to the attitude angle, determine the attitude displacement correction of the satellite navigation receiving equipment, according to the attitude displacement correction, the tidal level data observation value is corrected.Through the embodiment of the present application, the problems of high cost, complex system or error drift in the prior art and the single-antenna BDS scheme cannot correctly obtain the influence of attitude change on the real tidal level signal are solved, the attitude displacement correction of the satellite navigation receiving equipment is calculated by the camera to collect images, the tidal level data observation value is corrected, and the stability and precision required by the tidal level data observation value are achieved.

The present application provides a kind of based on unmanned aerial vehicle image's coast erosion monitoring method, belong to coast erosion monitoring technical field, the present application is by in the space and time reference control network of coastal zone monitoring region layout, adopts overall adjustment strategy to simultaneously enter unified coordinate system with multiple time phase image and is registered, utilizes octree space index organization point cloud data and extracts standard coast line position in combination with tide level-coast line response model, changes feature of coast line form is identified by persistence topological analysis, adopts hogge decomposition to reveal erosion driving force direction, topographic feature is input embedded into sediment transport physical constraint, and artificial intelligence prediction model outputs erosion rate field, based on the voxel grid method, calculates erosion volume and according to the erosion response adjustment function value dynamic adjustment sediment discharge flux correction coefficient, establishes multi-dimensional early warning index system to realize risk grade discrimination, solves the technical problem that multiple time phase coast erosion monitoring data registration accumulates large error and leads to the low precision of erosion change amount calculation.

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 application provides a calculation method suitable for mixed tide type characteristic tide level value extraction, and comprises the following steps: S1, obtaining original tide level data of consecutive years based on numerical simulation; S2, extracting high tide level data in a tidal period based on the original tide level data; S3, extracting high high tide level data which is greater than that on both sides among consecutive three high tide level data based on the high tide level data; S4, extracting ascending tide level data based on the high tide level data; and S5, calculating average high high tide level by combining the high high tide level and the ascending tide level data. The application is easy to program and realize by decomposing tide level characteristic value extraction steps, and has better applicability under the condition of large data compared with the traditional method. The rest tide level characteristic value extraction and average high tide level extraction ideas are the same, and will not be described here.

The application discloses a water level control method and system for submarine cable scour monitoring, and the method is as follows: three GNSS continuous operation reference stations are arranged along the coast and the offshore booster station platform to construct a tidal level observation network; a spatial interpolation model is constructed based on the tidal level observation network to correct the measured water level data in real time; the LSTM model is input with real-time tidal data and is corrected as a reference to obtain predicted water level correction data in a future preset time window; the tidal level accuracy of two types of data is calculated respectively, and the final water level correction data is calculated based on the calculated tidal level accuracy; the DTM time sequence of the submarine cable routing area is established for each period of final water level correction data, the scour change amount and the cumulative trend of the submarine cable routing area are analyzed through spatial superposition, and the submarine cable routing area scour heat map is formed. The application provides a unified high-precision elevation reference for each period of submarine cable scour monitoring, and ensures the consistency of the monitoring water bottom elevation accuracy of each period.

The present application relates to the field of drainage outlet structure, and particularly relates to a combined drainage outlet. The combined drainage outlet comprises a submerged dike and a water outlet buried in the submerged dike; the submerged dike has a trapezoidal cross section, and the top elevation is above the mean sea level; a first prefabricated drainage pipe extends from the coast to the submerged dike, and drains water through the water outlet. The submerged dike comprises a prefabricated tee joint, a second prefabricated drainage pipe connected to the prefabricated tee joint, and a third prefabricated drainage pipe connected to the second prefabricated drainage pipe, and the first prefabricated drainage pipe is connected to the prefabricated tee joint. The present application solves the problems of high cofferdam cost, easy impact of dredging and siltation after completion, landscape depression of the beach surface, and personnel safety risk.

The present application belongs to the technical field of ecological environment remote sensing and carbon cycle quantification, and particularly relates to a kind of based on water power-remote sensing coupling's coastal wetland horizontal carbon output estimation method and system.The method obtains multi-source remote sensing image, terrain elevation, tidal boundary, runoff boundary and measured carbon concentration data, constructs DOC, POC inversion model and total carbon concentration field;Combined with two-dimensional unsteady flow hydrodynamic model, water depth field and flow velocity field are obtained;According to the coupling relationship between water depth gradient and flow velocity direction, the active section of carbon exchange is automatically identified;The carbon concentration field is coupled with the normal flow velocity, water depth and flux correction coefficient, the instantaneous carbon flux is calculated, and the net horizontal carbon output total amount is obtained through the decomposition of rising tide-falling tide and adaptive time integration;Then, the measured data is used for parameter iteration update.The present application can improve the continuity, dynamics, accuracy and comparability of the estimation of coastal wetland horizontal carbon output.

This invention proposes a method and system for durability analysis of marine towers based on the coupling of tidal level and scour, belonging to the field of marine engineering structural health monitoring technology. Addressing the low accuracy of analysis results in existing technologies, this invention constructs a three-dimensional baseline operating condition matrix based on environmental parameters of the target sea area; collects data on the tower under healthy conditions to establish a healthy vibration baseline library; for each operating condition in the three-dimensional baseline operating condition matrix, real-time data on the tower during its service phase is collected, and the operating condition level is determined; based on the operating condition level determination results, the real-time collected data is matched with the corresponding operating condition group in the healthy vibration baseline library, and the actual offset is calculated; the real-time collected data is input into a hybrid neural network model to obtain the vibration characteristic offset caused by the current environmental factors, thereby determining the vibration characteristic offset caused by structural damage; and the current damage level is obtained based on the vibration characteristic offset caused by structural damage. This invention provides highly accurate analysis results.

This invention relates to the field of temporary wharf technology and discloses an adaptive tidal temporary wharf structure and its usage method. The structure includes a shore-side platform, prestressed square piles, a fixed steel approach bridge, a movable steel approach bridge, a main floating wharf, a secondary floating wharf, limiting sleeves, guide piles, a protective shell, position sensors, a bidirectional lead screw, a slider, and a first motor. The method includes construction deployment, component debugging, adaptive operation, and auxiliary protection steps. This structure and method, through the cooperation of position sensors and detection probes, controls the first motor to drive the bidirectional lead screw to rotate, causing the secondary floating wharf to move towards the center of the main floating wharf during high tide and expand outwards during low tide. Simultaneously, a second motor controls the angle switching of the baffle. It can adapt to different tidal force changes, preventing the floating body from swaying, tilting, and capsizing, ensuring operational stability, improving the quality and practicality of temporary wharf use, and adapting to various temporary berthing and operation scenarios.

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 present application relates to a kind of tide level acquisition method and system based on OWC wave energy conversion device.The method comprises: constructing energy loss prediction model in air chamber;Obtain the incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and aerodynamic output energy of current period;The incident wave energy and reflected wave energy are input into the model to obtain the predicted energy loss;Based on energy conservation relationship formula, solve tide level variation, and calculate current tide level.The system includes energy loss prediction module, wave energy acquisition module, water energy acquisition module, aerodynamic output acquisition module, energy loss calculation module, tidal energy solving module and tide level calculation module, and the above-mentioned method is realized in cooperation with this scheme.No external tide station is needed, and local sea area tide level can be inversed in situ, high frequency and high precision, which is suitable for OWC-breakwater fusion scene, and supports the collaborative operation of port and marine energy.

The application discloses a kind of automatic warning and regulation system of coastal tide level, belong to data processing field, the automatic warning and regulation system of coastal tide level includes: data set acquisition module, for obtaining a conventional data set containing accurate initial state and boundary driving condition by real-time tidal level data and background data fusion;At the same time, by processing the multi-source heterogeneous monitoring data representing special disaster mechanism, a parallel special driving factor data set is obtained, compared with prior art, the beneficial effects of the application are: the application innovatively designs the architecture of conventional and disaster data set separation acquisition, model automatic switching according to event identification, realizes the precision, special simulation of tide level process driven by different physical mechanism;By establishing the automatic identification and data fusion of disaster based on multi-threshold rule, the whole-process automation from multi-source information to disaster identification, to customized data set generation is realized, and the emergency response speed is greatly improved.