39 results about "Surficial sediments" patented technology

The invention discloses a seabed sediment classification method and product based on seabed surface sediment acoustic characteristics, and relates to the field of seabed acoustic detection. The method comprises the following steps: firstly, acquiring actual measurement data of seabed sound reflection of a measurement area in a marine environment, and performing inversion to obtain seabed surface sediment characteristic parameters; by analyzing the uncertainty and correlation of the characteristic parameters of the seabed surface sediments, acoustic characteristic parameters of the seabed surface sediments are screened out; constructing a deep neural network model based on the acoustic characteristic parameters of the seabed surface sediments, wherein the deep neural network model comprises a seabed acoustic-physical information neural network model and a sediment attribute prediction neural network model; expanding the training sample set according to the actual measurement data of seabed sound reflection and the acoustic characteristic parameters of the seabed surface sediments, and training and testing the deep neural network model; the trained seabed sediment classification model is adopted to perform seabed sediment classification of the measurement area, fine classification of the seabed sediment can be realized, and classification continuity and classification precision are improved.

The invention belongs to the field of marine geology, and particularly discloses an inversion method and application of seabed deposition rate and formation porosity distribution. The method comprises the following steps: obtaining a possible distribution range of the stratum porosity n changing along with the depth z in a to-be-researched region; obtaining the porosity of the surface sediment sample; according to the distribution range and the porosity of the surface sediment, assuming m possible change relations of the stratum porosity along with the depth at the position where research is planned to be carried out; calculating a corresponding average mass deposition rate Rsi for each assumed relationship that the porosity of the stratum changes along with the depth, and then simulating the distribution condition of the porosity of the seabed stratum under the deposition rate Rsi in numerical software; and comparing the formation porosity obtained by simulation under each Rsi condition with the corresponding assumed formation porosity distribution along with the depth, and if the two are consistent, determining that the formation porosity distribution along with the depth obtained by simulation is the actual formation porosity distribution at the position. The method is low in cost, convenient, fast and convenient to popularize.

The invention provides an experimental method for researching sediment erosion characteristics under complex hydrodynamic conditions. The experimental method comprises the following steps: collecting sediment samples on site through a columnar sampler; carrying out an annular water tank simulation experiment according to the sediment sample to obtain a bottom shear force on a sediment-water interface in the simulation experiment; hydrodynamic parameters in a real state are monitored and collected, shearing force of hydrodynamic acting on the sediment-water interface in a natural state is calculated, the bottom shearing force of the sediment-water interface in a simulation experiment is compared with the shearing force of the hydrodynamic acting on the sediment-water interface in the natural state, and erosion characteristics in the natural state are predicted. According to the invention, the sampler and the annular water tank are combined for use, so that the disturbance to a sediment-water interface in the sampling and experiment process is reduced, the integrity of a surface sediment structure is ensured, and the accuracy of a simulation experiment is improved.

The invention discloses a wetland nitrogen cycle optimization method and system based on machine learning, and belongs to the technical field of ecological engineering.The method comprises the steps that according to a comprehensive environment data set, a transverse lateral infiltration path and a vertical priority flow path are recognized, spatio-temporal evolution simulation is conducted through a cellular automaton model, and a nitrogen migration path is constructed; analyzing the interaction between the water flow driving flux and the underground water level on the path resistance, and determining the broadening degree of the transverse lateral seepage path; if the widening degree exceeds a preset threshold value, integrating the water body turbulence intensity data and the flow velocity shear effect value, and obtaining a bubble escape rate and a surface sediment disturbance frequency; calculating the nitrogen saturation and the spatial distribution of the sediment particle suspension amount, and obtaining the total re-release flux through flux overlay analysis; and constructing a nitrogen loss flux model in combination with the fluctuation rule, simulating the change of the nitrogen loss proportion, and determining the net nitrogen loss flux. According to the invention, fine monitoring of the dynamic change of wetland nitrogen can be realized.

The invention relates to the technical field of environment detection, and provides a device and method for detecting eutrophic pollutants in water sediment, the device comprises a base, a connecting table is fixedly mounted in the base, a plurality of sampling mechanisms are obliquely connected to the connecting table, and a motor is fixedly mounted at the upper end of the connecting table; the output end of the motor penetrates through the connecting table downwards to be provided with a driving gear, and the driving gear is meshed with the sampling mechanism. The device is put above a sampling position, a motor drives a driving gear to rotate, a plurality of sampling mechanisms meshed with the driving gear obliquely extend downwards in a threaded cylinder along the direction of the threaded cylinder, and meanwhile, a first electric push rod extends a sampling drill to the outer side of the bottom of a sampling pipe, so that the plurality of sampling mechanisms rotationally and obliquely pierce into water sludge; sampling of multiple point positions can be conveniently conducted at a time, the sampling precision and the data reliability can be conveniently improved, sludge is drawn into the sampling pipe through the sampling drill, and surface sediments at different positions of the sludge are sampled.

The invention discloses a method for extracting and detecting magnetic minerals in surface sediments in a floating rice planting area, which comprises the following steps: S1, collecting the surface sediments in the floating rice planting area, and fully dispersing surface sediment samples on paper; s2, wrapping a super-strong magnet with a plastic film, and suspending the super-strong magnet above the sediment sample for repeated adsorption; s3, the adsorbed particles are placed in clear water again, magnetic separation is repeatedly conducted for four to six times, and further purification is conducted to obtain magnetic minerals; s4, carrying out pretreatment on the obtained magnetic mineral sample, and carrying out iron and oxygen element identification on the magnetic mineral by utilizing a scanning electron microscope and an energy spectrum analyzer; s5, identifying ferrite magnetic minerals in the surface sediment by using X-ray diffraction; and S6, drawing a low-temperature chi-T curve, a high-temperature chi-T curve and a hysteresis loop to determine the type of the ferrite magnetic minerals. The magnetic minerals such as Fe3O4 and Fe2O3 in the surface sediments in the floating rice planting area can be simply, conveniently, quickly, efficiently and accurately extracted and detected.

The invention provides a lake surface sediment sampling device which comprises a sample storage pipe, and one end of the sample storage pipe along the axial direction of the sample storage pipe is provided with a sampling port; the moving structure is arranged in the sample storage tube and can reciprocate along the axial direction of the sample storage tube; the plugging assembly is fixed with the sample storage tube; the matching piece is arranged on the sample storage pipe and can reciprocate along the axial direction of the sample storage pipe; the blocking assembly comprises a baffle plate which can do reciprocating motion along the radial direction of the sample storage tube and is used for blocking the sampling port, and a driving part for providing power for the baffle plate; the matching piece comprises a first abutting structure used for abutting against the moving structure and a second abutting structure used for abutting against the baffle. The matching part is configured in a manner that the moving structure moves upwards in the axial direction of the sample storage pipe under the action of external force until the moving structure is propped against the first propping structure and drives the matching part to continuously move upwards, so that the second propping structure is separated from the baffle, and the baffle can move under the driving of the driving part and blocks the sampling opening.

The present invention relates to an unmanned vehicle for deploying and recovering a DGT device on a mudflat and an operating method thereof, belonging to the technical field of unmanned vehicles. The vehicle comprises a frame, a guide rail well mounted on the frame, an electric gate mechanism disposed at the bottom of the guide rail well, a DGT fixture and a DGT vibrating compactor disposed in order from bottom to top within the guide rail well. The bottom of the DGT fixture is used for detachably securing the DGT device. When the electric gate mechanism is opened, the DGT fixture can freely fall onto the mudflat. The DGT vibrating compactor can vibrate and press the DGT fixture downward, pressing the DGT device into the surface sediment of the mudflat. A DGT recovery machine is mounted on the frame for recovering the DGT fixture from the mudflat. The DGT recovery machine is equipped with an image transmission camera for capturing and locating the DGT fixture on the mudflat. The present invention is remotely operated, replacing manual deployment and recovery of the DGT device on the mudflat, saving time and effort and ensuring the personal safety of operators.

The present application relates to the technical field of seabed sediment collection, and discloses a seabed surface layer sediment layered collection device, wherein the collection cylinder is composed of multiple segments in a splicing mode, and the inside of the collection cylinder is provided with multiple layered intercepting boxes. The collection cylinder is composed of multiple segments in a splicing mode, so that the collection depth of the collection cylinder can be adjusted according to actual needs. The splicing ring seat, limiting groove and limiting bolt are used to facilitate the quick combination and connection between multiple collection cylinders, so that the connection is stable, and the subsequent quick taking of samples is facilitated. By adjusting the length of the single-segment collection cylinder, the requirements of different sampling layer spacings in layered sampling can be met, so that the flexible application conditions are met. By arranging multiple layered intercepting boxes in the collection cylinder, the internal space of the collection cylinder is divided into multiple groups of collection cavities, so that the samples with different layer spacings can be stored separately in layers during layered sampling.

The application discloses a kind of multi-point mobile deep-sea sampling drill chassis wheel train coupling dynamics simulation methods, comprising the following steps: 1) establish multi-point mobile deep-sea sampling drill three-dimensional model and import RecurDyn multi-body dynamics analysis software to carry out entity replacement;2) add the constraint and initial stress between each component, such as fixed pair, moving pair, rotary pair;3) add the contact between chassis and guide wheel, supporting wheel, tug, transmission wheel and track, and mesh division is carried out on the wheel train part of hydraulic chassis in the software, and flexible treatment is carried out, and the soil parameters simulating surface sediment at 6000m in deep sea and the hydrodynamic force received by drill are added;4) finally, the rigid-flexible coupling dynamics simulation of multi-point mobile deep-sea sampling drill chassis wheel train is carried out, and the impact result received by chassis wheel train is observed after simulation, which provides theoretical basis and data support for the safe release of multi-point mobile deep-sea sampling drill.

The utility model discloses an intertidal zone surface sediment sampler which comprises a supporting plate, a vertical pipe is fixedly connected to the top of the supporting plate, scale marks are arranged at the bottom of the front side of the vertical pipe, a handle rod is fixedly connected to the top end of the vertical pipe, and a rotary supporting assembly is fixedly connected to the bottom of the supporting plate. The two sides of the rotary supporting assembly are fixedly connected with triangular shovel boxes with the bottoms of conical structures, and the two triangular shovel boxes are symmetrically arranged. According to the utility model, a series of structures are arranged, so that the two triangular shovel boxes can be conveniently inserted into intertidal zone surface sediments in an electric driving extrusion closing manner, and then stable shovel holding sampling is carried out, the collected surface sediments can be stably limited and prevented from leaking, and the sampling stability is improved; the sampling depth is conveniently limited, the limiting position is flexibly and accurately adjusted according to surface sampling requirements of different depths, personnel can conveniently and accurately control the sampling depth of surface sediments, and the sampling accuracy is improved.

The invention discloses a shallow lake multilayer environment DNA and surface sediment combined sampling method. The method comprises the following steps: S1, acquiring basic geographic information and water physical and chemical parameters of a lake; s2, on the basis of the environment data obtained in the S1, lake layout candidate sampling points are divided; s3, carrying out cleaning treatment on the sampling device; s4, respectively collecting water samples of different water layers of the lake; s5, collecting a lake surface sediment sample, and sealing and storing the lake surface sediment sample and the water sample collected in S4 in different chambers; s6, marking the sealed water sample and sediment sample; and S7, synchronously recording environment parameters and operation logs of the whole sampling process. Compared with the prior art, the shallow lake multilayer environment DNA and surface sediment combined sampling device and the sampling method thereof have the advantages that high-quality combined acquisition of a water body vertical section and a sediment interface eDNA sample is realized, and a reliable sample basis is provided for accurate monitoring of a lake ecosystem.

The invention discloses a method and a system for determining heavy metal pollution characteristics of water sediment, and relates to the technical field of environment monitoring and water environment governance, the system is characterized in that surface sediment samples are regularly collected at different positions of water in a mine area and an industrial gathering area, and a metal element data set and a reference data set are established; calculating a single-factor pollution index, and judging whether single metal exceeds the standard or not; integrating the single-factor pollution indexes to obtain a comprehensive pollution index, and determining the overall pollution level; whether manual input pollution exists or not is judged by calculating the geocumulative index; according to the method, correlation analysis, principal component analysis, factor analysis and GIS space statistics are combined, multi-dimensional indexes are extracted, pollution source analysis coefficients are calculated, agricultural non-point source or industrial emission dominant pollution types are determined, and corresponding prevention and control strategies are generated. According to the method, multilevel feature recognition and source analysis of sediment heavy metal pollution can be realized, and a scientific basis is provided for water area pollution treatment and risk management and control.

The invention discloses a seabed modified gel injection vehicle for deep-sea mining and a using method, and relates to the technical field of deep-sea resource development, the seabed modified gel injection vehicle comprises a vehicle body, a walking chassis, a gel injection mechanism and a driving mechanism, the vehicle body is provided with a gel storage cabin, and the gel storage cabin is used for storing a gel material; the walking chassis is arranged at the bottom of the vehicle body and used for supporting the vehicle body to walk on the seabed. The gel injection mechanism is mounted on the vehicle body, is communicated with the gel storage cabin and is used for injecting a gel material into sediment on the surface layer of the seabed; the driving mechanism is in transmission connection with the gel injection mechanism and used for driving the gel injection mechanism to execute injection action, plume generation is effectively inhibited, the overall efficiency of deep-sea mining is improved, and the marine ecological environment is protected.

The invention discloses a surface sediment sampler for fishery environment monitoring, and relates to the technical field of sediment sampling, the surface sediment sampler comprises a sampling pipe, one end of the sampling pipe is provided with a mounting plate, one side of the mounting plate is fixedly provided with a connector, the sampling pipe is in threaded connection with the connector, one side of the mounting plate is fixedly provided with a hollow rod, and the hollow rod is in threaded connection with the connector. A hollow rod is arranged in the mounting plate, a fixing plate is fixedly installed at the end, away from the mounting plate, of the hollow rod, grips are symmetrically installed on the two sides of the fixing plate, the movable rod is slidably connected into the mounting plate and the connector, the movable rod is slidably connected with the hollow rod, and a handle is fixedly installed on one side of the movable rod; pistons are fixedly mounted at the ends, away from the mounting plate, of the moving rods; by arranging the sampling pipe, when the sampling pipe is used for sampling sediment in a shallow water area and encounters a plant root system, the plant root system can be conveniently cut off, the sampling pipe is prevented from being inserted too difficultly, a worker can conveniently operate the sampling pipe, and convenience and practicability are improved.

This invention relates to the field of aquatic environmental ecological risk assessment and pollution control technology, and specifically discloses a method for assessing the risk of heavy metal release from sediments and constructing quality benchmarks based on phase equilibrium partitioning and DGT technology. The method includes the following steps: S1, Sample collection and pretreatment: Sampling points are set up in the target water area, and surface sediment samples are collected using a mud grabber. Simultaneously, a columnar sampler is used to collect undisturbed columnar sediment samples for deploying the DGT device; S2, Obtaining dynamic information on heavy metals at the sediment-water interface; S3, Calculation and relationship establishment of key parameters: a. Calculating the solid phase recharge coefficient R of heavy metals in the sediment: R = C_DGT / C_Peeper. This method for assessing the risk of heavy metal release from sediments and constructing quality benchmarks based on phase equilibrium partitioning and DGT technology can obtain dynamic flux and bioavailability information of heavy metals at the sediment-water interface in situ and at a microscale, avoiding the disturbances and low spatial resolution of traditional sampling methods.

The invention discloses an anchor type emission type surface sediment sampling device, and relates to the technical field of sediment sampling, the anchor type emission type surface sediment sampling device comprises an anchor type sediment collecting device, a remote electromagnetic emission device, a portable telescopic recovery device and an intelligent sampling control system, the anchor type sediment collecting device comprises an anchor rod as a main body supporting structure, a camera and a motor module are fixedly installed on the top of the base. The anchor type device adopts the design of a hinge type anchor fluke and a permeable collecting net, the stress angle is optimized through the front end of a shovel-shaped sheet, the shovel-shaped sheet is accurately embedded into surface sediment (the depth is smaller than or equal to 20 cm), and low-disturbance sampling and safe recycling are achieved in combination with a sliding type air cylinder and an inflation floating module; the remote electromagnetic launching device improves the projection speed (greater than or equal to 25m / s) and the sub-meter precision through a multi-stage acceleration electromagnetic coil and intelligent angle adjustment; the intelligent system integrates a water sensor, a fuzzy-PID algorithm and a buoy sonar module, dynamically regulates and controls the sampling process and feeds back data in real time.

The utility model discloses a lake and reservoir surface sediment collecting device which comprises a box body, the top of the box body is provided with a moving plate through a lifting mechanism, the top of the moving plate is provided with a spiral feeding rod through a rotating mechanism, the bottom of the moving plate is fixedly provided with a barrel body, and the surface of the barrel body is provided with a falling hole in a penetrating mode. And a collecting mechanism is arranged on the surface of the barrel. The spiral feeding rod and the barrel are driven by the lifting mechanism to descend to a certain depth according to needs, the spiral feeding rod is driven by the rotating mechanism to rotate, surface sediments can be conveyed through the spiral feeding rod and fall into the collecting cabinet through the falling hole, and then the surface sediments can be collected. The lifting mechanism drives the spiral feeding rod and the barrel to ascend, the box can be taken out by pulling the hanging bracket, the purpose of conveniently lifting the spiral feeding rod is achieved, and the height of the spiral feeding rod can be flexibly adjusted.

The invention discloses a floating rice planting area surface sediment mercury concentration rapid detection method, which comprises: S1, obtaining magnetic parameter data of a target floating rice planting area surface sediment, and obtaining physicochemical index data of the target floating rice planting area surface sediment; s2, inputting the obtained magnetic parameter data and physicochemical index data of the surface sediment of the target floating rice planting area into an MDN artificial intelligence model, and training and constructing the MDN artificial intelligence model; and S3, predicting the mercury concentration in the surface sediment of the floating rice planting area to be detected through the magnetic parameters, the physicochemical indexes and the constructed MDN artificial intelligence model. According to the method, the relationship among environmental magnetic parameters, physicochemical indexes and the floating rice planting area surface sediment mercury concentration is established through artificial intelligence, a floating rice planting area surface sediment mercury concentration rapid detection model is constructed, and a new method and a new thought are provided for floating rice planting area surface sediment mercury concentration detection.

This application belongs to the field of marine geology, specifically disclosing an inversion method and application for seafloor sedimentation rate and stratigraphic porosity distribution. The method includes: obtaining the possible distribution range of stratigraphic porosity *n* with depth *z* within the proposed study area; obtaining the porosity of surface sediment samples; based on the distribution range and the porosity of the surface sediments, assuming *m* possible stratigraphic porosity variations with depth at the proposed study location; and for each assumed stratigraphic porosity variation with depth, calculating the corresponding average mass sedimentation rate *R*. si Then, the deposition rate R is simulated in numerical software. si The porosity distribution of the seafloor strata below; will be shown in each R si The simulated formation porosity distribution with depth is compared with the corresponding assumed distribution under the given conditions. If they match, the simulated formation porosity distribution with depth is the actual formation porosity distribution at that location. This application is low-cost, convenient, quick, and easy to promote.

The present invention relates to the technical field of sampling equipment, and discloses a precise positioning surface sediment sampler, comprising a sampler body (1), at least two groups of sampling mechanisms (2) arranged on the circumference of the sampler body (1), a sample mixing mechanism (3) connected to the sample outlet end of the sampling mechanism (2), a sample storage mechanism (4) for storing samples, and a four-wheel drive mechanism (5) arranged at the bottom of the sampler body (1); at least two groups of extension brackets (11) are extended from the circumference of the sampler body (1), and a moving mechanism (12) is arranged in the extension bracket (11), and each moving mechanism (12) is used to drive a group of sampling mechanisms (2) to move relative to the sampler body (1), thereby realizing multi-point precise positioning sampling; the sampler realizes multi-point precise sampling through the cooperation of the multiple groups of sampling mechanisms and the moving mechanism, and is easy to operate and compact in structure.

This invention relates to the field of deep-sea sampling technology, specifically to an in-situ, high-fidelity sampling device and method for shallow seabed sediments. The device includes a sampling cylinder with a sampling chamber at its lower end. A ball groove is formed through the lower end of the sampling chamber, and a ball valve is located inside the ball groove. A rotating shaft is fixedly connected to both ends of the ball valve, and a bevel gear is fixedly connected to one end of the rotating shaft. A motor is located on the inner edge of the sampling cylinder, and a bevel gear meshing with the bevel gear is fixedly connected to the output shaft of the motor. A pressure-reducing assembly is located at the upper end of the sampling cylinder. The pressure-reducing assembly includes a pressure-reducing cavity located at the upper end of the sampling cylinder, with multiple bladder walls inside the pressure-reducing cavity. A ball groove is formed at the lower end of the pressure-reducing cavity, and a ball valve is located within the ball groove. This invention stabilizes the in-situ pressure in the sampling chamber, preventing structural damage to the sample due to sudden pressure changes, and achieving in-situ high-fidelity sediment sampling.

The present invention discloses a natural gas collection device applicable to submarine mud volcanoes, which comprises a collection unit, a heating unit and a suction unit. The collection unit includes a collection cover and a collection blanket covering the outer wall of the collection cover. The edge of the bottom of the collection blanket extends outward to form a protruding part. The heating unit is arranged below the protruding part of the collection blanket. The suction unit is connected to the collection cover. The collection unit is used to cover the submarine mud volcano for natural gas collection. The heating unit is used to heat the natural gas hydrate in the shallow surface sediments so that the natural gas hydrate decomposes into water and natural gas. The suction unit is used to suck the natural gas collected by the collection unit. The present invention can effectively collect the natural gas released by the mud volcano in a slow eruption state and the natural gas generated by the decomposition of the natural gas hydrate in the shallow surface sediments, which will help to alleviate the current energy crisis, seawater acidification and greenhouse effect.

The invention discloses a heavy metal pollutant damage assessment method, device and system, and a storage medium. The method comprises the following steps: S1, acquiring a historical surface water hyperspectral remote sensing image of a predetermined area; s2, obtaining surface sediment data according to the historical surface water hyperspectral remote sensing image; s3, training a BP neural network model according to the historical surface water hyperspectral remote sensing image and the surface sediment data to obtain a heavy metal inversion model; s4, inputting the surface water hyperspectral remote sensing image of the target area into the heavy metal inversion model to obtain pollution characteristic information of heavy metal; and S5, performing pollutant damage assessment according to the pollution characteristic information of the heavy metal. By adopting the technical scheme, the damage of the heavy metal pollutants in the surface water can be evaluated.

The utility model relates to the technical field of sediment sampling, and discloses a shallow water surface sediment sampling device which comprises a steel wire rope and a sampling mechanism, the sampling mechanism comprises a sampling box, a sampling cover, a rotating assembly and a limiting assembly; the rotating assembly comprises a first rotating block, a second rotating block, a rotating seat, a guide seat, a connecting rope and a first waterproof motor; the limiting assembly comprises a first limiting seat, a second limiting seat, a second waterproof motor, a gear, a limiting rack and a limiting block; through arrangement of a steel wire rope and a sampling mechanism, a sampling box and a sampling cover are matched to sample shallow water surface sediments, through arrangement of a rotating seat, a guide seat, a connecting rope and a rotating block, the sampling cover can be connected with the sampling box, and through arrangement of a gear, a limiting rack and a limiting block, a first limiting seat and a second limiting seat can be connected; the sampling cover is fixedly connected with the sampling box, so that the original form of shallow water surface sediments is kept, and the sampling success rate is increased.

This invention relates to the field of marine mineral resource exploration and evaluation technology, specifically to a method for identifying shallow-surface zircon resource potential areas in marine areas based on zircon grade data simulation analysis. The method includes the following steps: S1: Collecting shallow-surface sediment samples from the seabed to obtain zircon grade and marine environmental parameters; S2: Constructing a multivariate regression model of zircon grade and environmental factors; S3: Establishing a spatial probability distribution model of zircon grade; S4: Establishing an index fusion system and evaluating the resource potential value of each region; S5: Iteratively optimizing the potential area classification threshold and correcting parameters; S6: Generating a potential distribution heatmap and outputting the boundary coordinates of high-potential areas and a resource estimation report. This invention, by constructing a discrimination system integrating data modeling, uncertainty quantification, and visualization delineation, achieves high-precision identification and quantitative assessment of shallow-surface zircon resource potential areas in marine areas.

The invention discloses a seafloor surface sediment fidelity sampler, comprising an in-situ sampling packaging module and a pressure maintenance module, wherein the in-situ sampling packaging module comprises a penetration component, a sampling component and a pressure sensor, wherein the sampling component comprises an air bag and a sampling barrel, wherein the upper end of the sampling barrel is connected to a sealing end cap, wherein a water storage chamber is arranged at the lower end of the sealing end cap, wherein a flow-stopping channel is connected to the lower end of the water storage chamber, wherein the lower end of the flow-stopping channel is connected to a water inlet channel, wherein the inner wall of the flow-stopping channel is arranged in an inclined manner, wherein a one-way ball is arranged in the flow-stopping channel, wherein the diameter of the one-way ball is greater than the inner diameter of the water inlet channel, wherein the lower end of the water inlet channel is connected to a storage chamber, wherein a coarse filter screen is arranged between the water inlet channel and the storage chamber, wherein the lower end of the storage chamber is connected to a high-pressure valve group, wherein the lower end of the high-pressure valve group is connected to the penetration component. In the present invention, the sampling component is driven to penetrate into the seafloor surface layer by the penetration component, so that sediment and overlying water enter the sampling barrel, and then the coarse filter screen delaminates them and stores them in the storage chamber and the dewatering chamber respectively.

The invention provides an in-situ quantitative evaporation capacity monitoring device which comprises an evaporation container, a water storage container, a water body storage bag and a connecting pipe, the evaporation container is embedded underground, and the top of the evaporation container is flush with the ground surface; the water storage container is embedded underground, and a plurality of fine holes are formed in the water storage container; the fine holes penetrate through the container wall of the water storage container; the water body storage bag is arranged in the water storage container; one end of the connecting pipe is communicated with the evaporation container, and the other end of the connecting pipe penetrates through the water storage container and is communicated with the water body storage bag. In the application, the water body storage bag is communicated with the evaporation container through the connecting pipe, and the water body storage bag is completely submerged in the water storage container, so that the evaporation process in a natural state can be effectively simulated, and the evaporation capacity of the surface layer loose sediment underground water can be obtained by calculating the reduction of the water volume in the water body storage bag; and a plurality of pores are distributed on the water storage container, so that pore water in the water storage container is kept horizontal with external surface sediments all the time, and the monitoring precision and reliability are improved.

The application discloses a net cage fish culture environment carrying capacity evaluation method and system based on sedimentation flux, and relates to the technical field of culture environment regulation and control. The method comprises a culture fish population biomass model, a relationship model between the sedimentation flux of the biological sediment in the net cage culture area and the culture fish population biomass, and an organic matter and inorganic matter decay model in the surface sediment. The method selects the organic carbon content in the surface sediment of the seabed as an environmental index, and according to the threshold value of the organic carbon content in the surface sediment, the stocking quantity of the culture fish capable of making the organic carbon content in the surface sediment reach the threshold value at the end of the culture period is predicted as the environmental carrying capacity of the net cage culture. The application can provide a direct basis for the production decision of the net cage fish culture, maintain a good water environment, and realize the sustainable development of the net cage culture industry.

The embodiment of the invention provides an in-situ collection device for surface sediments and overlying water and a collection method of the in-situ collection device. Wherein the in-situ collection device comprises a rotary rod supporting piece, a sediment collection unit and a covering water collection unit. The sediment collecting unit comprises a mud collecting barrel, the mud collecting barrel is connected to one end of the rotating rod supporting piece, and a mud inlet is formed in the side wall face of the mud collecting barrel; the overlying water collecting unit is slidably and detachably arranged on the rotating rod supporting piece in a penetrating and sleeving manner, and the overlying water collecting unit can abut against the mud collecting barrel. The sludge inlet is formed in the side wall of the sludge sampling barrel, so that sediments enter the sludge sampling barrel from the side direction under the condition that the surrounding environment is not disturbed, and interface disturbance caused by vertical insertion is effectively avoided; the in-situ collection device for the surface sediment and the overlying water has the advantages of being high in in-situ sampling precision, small in environmental disturbance, capable of accurately obtaining layered samples and the like.