44 results about "Sediment transportation" patented technology

The invention discloses a river model multi-data processing analysis method and system, and relates to the technical field of hydraulic engineering, and the method comprises the steps: extracting a motion feature vector from a digital twin model, and carrying out the preprocessing to generate a standard river motion data set; according to the method, the sediment space distribution concentration Nsc (x, y, z, t) in a three-dimensional coordinate grid is calculated through a standardized data set, and the change trend of the sediment space distribution concentration Nsc (x, y, z, t) along with time is evaluated. When the sediment space distribution concentration Nsc (x, y, z, t) is larger than 0, highlighting marking is conducted on the abnormal area through a visual interface; when the sediment space distribution concentration Nsc (x, y, z, t) is less than or equal to 0, the sediment concentration is normal. For an abnormal area, the method further calculates the sediment conveying capacity Qs and the sediment deposition rate S, accurately predicts the moving path, the sediment deposition area and the sediment deposition speed of the sediment, dynamically analyzes the sediment movement condition of the river, and can track the sediment change trend in real time in a complex dynamic environment.

The invention discloses a submarine scoured pipeline stability early warning method based on artificial intelligence, and relates to the technical field of submarine pipeline protection, and the method comprises the steps: collecting and sorting submarine pipeline historical reconnaissance data and monitoring data of a target region; and constructing a seabed-submarine pipeline local fine three-dimensional hydrodynamic-sediment numerical model on the basis of a solution Navier-Stokes equation and a sediment transportation model. According to the method, the historical reconnaissance data, the monitoring data and the numerical model result are integrated, the coupling effect of various factors can be comprehensively considered, then the dynamic characteristics of seabed scouring are more comprehensively captured, key scouring factors influencing the stability of the pipeline are more accurately recognized, and meanwhile, the scouring process and result simulated by the numerical model are combined, so that the stability of the pipeline is improved. According to the method, the stress distribution and deformation conditions of the pipeline under different scour depths can be analyzed more accurately, then an early warning signal is sent out in advance, the risk that the pipeline is damaged due to scour is effectively reduced, and the reliability and accuracy of early warning are improved.

The invention provides a freezing circle watershed hydrological prediction method and system based on multi-source data fusion, and relates to the technical field of hydrological monitoring and sediment monitoring, and the method comprises the steps: obtaining a vibration signal of the interaction of a water flow and a riverbed and meteorological data in a region, and carrying out the preprocessing; the preprocessed meteorological data and vibration signals are input into a multi-source data fusion model, sequential feature extraction is conducted on the meteorological data and the vibration signals through a multi-layer perceptron in the multi-source data fusion model, the extracted sequential features are fused through a gating circulation unit, and multi-source data fusion features are obtained; and carrying out empirical mode decomposition and Hilbert spectrum analysis on the preprocessed vibration signal to obtain a plurality of signal characteristics such as instantaneous frequency and instantaneous amplitude of the vibration signal, inputting the signal characteristics and the multi-source data fusion characteristics into a hydrological parameter prediction model, and outputting corresponding predicted values of the water flow velocity, the flow and the sediment transport capacity.

The invention discloses a river sediment scouring and silting simulation method, and belongs to the technical field of hydraulic engineering and hydrological simulation. In order to solve the problem that it is difficult to accurately simulate the river sediment erosion and deposition evolution trend in the prior art, the method comprises the steps that on the basis of actually measured topographic data and channel chart data of a target river reach, a water-sediment coupling mathematical model is constructed by adopting a non-uniform sediment unbalance sediment transportation theory, and the model interacts with a water power module and a wave module in real time through an MCT coupler; actually measuring a flood and water and sediment series data calibration verification model; and obtaining future water and sediment process data predicted by a plurality of climate modes, inputting the future water and sediment process data into the verified model, dividing river reaches according to the characteristics such as riverbed gradient and river channel curvature, and calculating the erosion and deposition amount of each sub-river reach in the future 50 years. The method can simulate water flow and sediment movement of rivers, reservoirs and lakes, can be applied to the fields of riverway regulation planning, flood control and disaster reduction decision making, reasonable development and utilization of water resources and the like, and provides important data support and scientific basis for construction and management of water conservancy projects.

The invention discloses an analysis method for sediment transportation and deposition in a large-spatial-scale watershed, and relates to the technical field of sediment deposition analysis. The method comprises the following specific steps: collecting a plurality of sediment sediment samples at each sampling point in a drainage basin; analyzing the sediment sediment sample through particle size grading to obtain a sample particle analysis result; generating a particle size grading distribution curve according to the sample particle analysis result; and through the particle size grading distribution curve, according to the proportion of each particle size component in the particle size grading distribution curve, in combination with the erosion amount and the sediment transportation ratio, carrying out sediment budget calculation. According to the method, sediment budgetary calculation is carried out on the large-spatial-scale watershed by applying a particle size grading analysis method, the heap, deposition and transportation conditions of erosion sediment of different particle size groups in the watershed are obtained, and the calculation result is accurate.

The invention relates to the technical field of submarine cable engineering equipment, and discloses a submarine cable bending limiter failure analysis method and system, and the method comprises the steps: constructing a large-scale wave water tank experiment system; a wave flow test is carried out in a large-scale wave water tank experiment system, and three-dimensional terrain evolution data of a scouring pit formed at the single-pile foundation model and dynamic strain response and displacement of the submarine cable bending limiter model are obtained; constructing a hydrodynamic force-sediment transportation-submarine cable motion coupling numerical model according to the three-dimensional terrain evolution data, the dynamic strain response and the displacement; and according to the hydrodynamic force-sediment transportation-submarine cable motion coupling numerical model and different hydrodynamic force conditions, the quantitative relation between the scour range extension and the failure threshold value of the submarine cable bending limiter is determined. According to the scheme, the tensile stress and bending response change rule of the submarine cable and the bending limiter can be quantitatively analyzed, and reference is provided for optimal design and protection of the offshore wind power pile foundation submarine cable bending limiter.

The invention discloses a reservoir desilting method and device using fixed jet flow, and relates to the technical field of water conservancy and hydropower engineering desilting. According to the method, the flow speed, pressure, mud layer thickness and gradient parameters of water around a nozzle are collected in real time; calculating a jet flow angle compensation coefficient, and identifying a nozzle direction stable state; on the basis of a nozzle set with stable direction, a nozzle group is constructed and a time sequence differential control table is established by combining a topological relation between nodes and disturbance propagation characteristics, so that ordered migration of turbulent flow disturbance is realized; sediment concentration, flow velocity and flow data are collected in a flow guide plate and a sediment discharge port area, and a desilting efficiency index is calculated and used for evaluating sediment transportation continuity and flow guide performance; and a comprehensive operation optimization coefficient is generated through a multivariable adaptive weighted fusion algorithm, and the system automatically executes adaptive regulation or sends out a manual intervention prompt. According to the method, self-monitoring, self-correction and global optimization of the fixed jet system can be achieved, and the reservoir dredging efficiency and the operation stability are remarkably improved.

The invention relates to the technical field of coastal engineering, and discloses a coastal sand transport calculation method and system for a sandy coast, and the method comprises the following steps: obtaining target parameters and initial profile data of a target coast; calculating a profile change item caused by transverse sediment transport through a one-dimensional beach evolution model; an equivalent coastal distance parameter is innovatively introduced, and the coastal sediment transport gradient is rapidly estimated; calculating an elevation change item caused by coastal sediment transportation in combination with the gradient; overlapping transverse and coastal change items to obtain complete bed elevation evolution data; iteratively calibrating the equivalent coastline distance parameter based on historical terrain data until the simulation result conforms to the actually measured shoreline change; and finally outputting the calibrated coastal sediment transportation influence prediction. And the problem of prediction deviation caused by neglecting the coastal sediment transport gradient of a traditional one-dimensional beach evolution model can be solved.

The invention discloses an in-situ suspended sediment concentration and flux prediction system based on conductivity data, and relates to the technical field of marine environment in-situ monitoring, the in-situ suspended sediment concentration and flux prediction system comprises a data processing and visualization platform, the data processing and visualization platform is in communication connection with the following modules: a data acquisition module, a data processing module, a data processing module and a data processing module, the method is used for extracting multi-dimensional water body data collected in an in-situ environment from a database. According to the method, a continuous vertical concentration-flow velocity matrix is generated through coupling corrected suspended sediment concentration data and flow velocity data, a flux prediction model is established in combination with historical data, a nonlinear relationship between sediment transportation flux and flow velocity-concentration is analyzed, and a random forest algorithm is adopted to determine the flow velocity-concentration of the sediment. The flow velocity, the conductivity interval depth and the corrected suspended sediment concentration serve as input variables, a sediment flux prediction value is output, static and dynamic comprehensive prediction of sediment fluxes at different moments and at different positions is achieved, and a quantitative analysis tool is provided for ocean sediment dynamic research and mineral environment evaluation.

The invention provides a beach sediment transportation amount prediction method, and relates to the technical field of sediment transportation amount prediction.The beach sediment transportation amount prediction method comprises the steps that firstly, a first sediment transportation distance of a first beach within a first preset duration is determined according to first geological information of the first beach; determining a first to-be-transferred sediment line and a second to-be-transferred sediment line based on two first coastlines of the first beach before and after the first preset duration and the first sediment transportation distance, and determining a distance between the two to-be-transferred sediment lines, and finally, determining the sediment accumulation rate of the first beach based on the determined distance and the sediment accumulation rate of the first beach. And obtaining the predicted first sediment transportation amount through the machine learning model. Through the technical scheme of the invention, the to-be-transferred sediment line corresponding to the coastline can be determined in combination with the geological information of the first beach, so that the predicted value of sediment accumulation after the preset time interval can be obtained according to the distance between the to-be-transferred sediment lines before and after the preset time interval and the sediment accumulation rate.

The spiral river dredging sediment conveying equipment comprises a ship body, a working bin is formed in one side of the ship body, a collecting cavity is formed in the other side of the ship body in a hollow mode, a driving assembly is installed in the working bin, one end of the driving assembly is fixedly connected with the bottom of one end face of a movable plate, and the movable plate is movably arranged in the working bin; the top of one end face of the movable plate is fixedly connected with one end of a material pressing assembly, the middle of the material pressing assembly is hinged to a support, the bottom end of the support is fixedly connected with the top end of the ship body, and the bottom of the other end of the material pressing assembly is fixedly connected with a pressing disc. A tubular spiral conveyor is arranged on the side, away from the pressing disc, of the top of the feeding hopper and fixedly connected with a plurality of supporting bases, the bottom ends of the supporting bases are fixedly connected with the bottom end of the ship body, the top of the end, away from the feeding hopper, of the tubular spiral conveyor is fixedly connected with one end of a feeding pipe, and the other end of the feeding pipe is fixedly connected with one end of a connecting hose.

The invention provides a river bed evolution equilibrium theory-based Yellow River downstream sediment transportation water demand calculation method, system and equipment and a medium. The method comprises the following steps of S1, acquiring river channel information and sediment parameters of a Yellow River downstream target river reach; calculating a comprehensive stability index of a riverbed according to the riverway information and the sediment parameters; s2, on the basis of the river channel information, the sediment parameters and the riverbed comprehensive stability indexes, balanced river channel parameters are calculated through a simultaneous water flow continuity equation, a water flow motion equation and a river facies relation; and S3, substituting the balanced riverway parameters and the sediment parameters into the sediment transport equation to obtain the saturated sediment transport capacity of the balanced riverway, and calculating the sediment transport water demand under different sediment coming scenes according to the saturated sediment transport capacity of the balanced riverway. According to the method, the sediment transportation water demand under different sediment incoming amounts and riverbed boundary conditions in the future period can be accurately calculated.

The retaining dam with the sediment separation function comprises a supporting structure arranged on the upstream face of a dam body, a protection structure and a sediment cleaning mechanism, the supporting structure comprises a supporting column arranged on the dam body and a first sediment conveying mechanism, and the sediment cleaning mechanism comprises a third sediment conveying mechanism and a second sediment conveying mechanism; a discharge port of the second silt conveying mechanism and a discharge port of the third silt conveying mechanism are respectively connected with a feed port of the first silt conveying mechanism; and a discharge port of the first silt conveying mechanism is connected with the top surface of the dam body. The protection assembly is installed on the upstream side of the gate, the upstream side of the gate can be protected through the protection assembly, silt on the upstream side of the protection assembly is conveyed into the vertical first silt conveying mechanism through the second silt conveying mechanism and the third silt conveying mechanism which are horizontally arranged, and the silt is conveyed out through the first silt conveying mechanism; the silt is timely cleaned, the silt is prevented from being accumulated below the upstream side of the dam body, and normal work of the gate is ensured.

The invention discloses a sediment source tracking method for numerical simulation of clastic sedimentary rock deposition, and the method comprises the following steps: S1, data collection: the geological data of a research area are widely collected, the topographic data cover a high-precision digital topographic measurement result, and the accurate mastering of topographic relief is ensured; geochemical data of the rock sample are obtained through an advanced analysis instrument in a professional laboratory, and the accuracy of element analysis is guaranteed; deposited layer thickness data are explored by means of various exploration means. According to the established numerical model, various factors in the sediment carrying and depositing process are comprehensively considered, the movement track of the sediment can be simulated more truly, the tracking precision is improved, refined tracking of the sediment source is achieved through multi-level tracer system construction and tracer dynamic updating management, and the tracking precision is improved. The source and movement history of the sediment can be better reflected, and the advantages of the method in the aspects of accuracy, efficiency and reliability are ensured through strict effect evaluation.

The utility model discloses a mud-water separation treatment device, which relates to the technical field of mud-water separation, and comprises a mounting platform, the inner side of the mounting platform is fixedly connected with a collecting table, and the upper side of the mounting platform, close to the left and right sides, is fixedly connected with four vortex separators which are distributed in a rectangular shape; a discharging pipe is fixedly connected to the middle of the lower side of the collecting table, stirring mechanisms are movably connected to the positions, close to the upper side, of the front wall and the rear wall of the collecting table in a sleeving mode, and a conveying mechanism is movably connected to the outer side of the vortex separator in a sleeving mode. According to the mud-water separation treatment device disclosed by the utility model, the collecting table is arranged at a high position, and then the silt discharge hole of the vortex separator is directly formed in the collecting table, so that the vortex separator directly discharges silt into the collecting table, the silt is conveyed into the silt treatment device by utilizing gravity, and a mechanism pipe can be quickly disassembled when the device is blocked; and the operation is convenient, and the problem of blockage caused by direct pipeline conveying is avoided.

The invention relates to the technical field of environmental treatment, in particular to an inland water sediment treatment system and method. The system comprises a suction unit, a temporary storage unit, a mixing unit, a curing and adding unit and a dehydration storage yard, wherein the suction unit is used for extracting bottom mud of a water body and conveying the bottom mud to the temporary storage unit, the curing and adding unit is used for injecting a stabilizer into the mixing unit, and the mixing unit enables the bottom mud, airflow and the stabilizer to form a uniform gas-liquid-solid three-phase system; high-risk exchangeable heavy metal, high-risk carbonate combined heavy metal and high-risk iron and manganese oxide combined heavy metal are directionally converted into stable mineral phases, dewatering and pennisetum hydridum planting are matched, residual heavy metal is adsorbed for a long time by means of the hyperaccumulation characteristic of pennisetum hydridum, and end ecological management and control are achieved. According to the scheme provided by the invention, the links of desilting, heavy metal curing, dewatering and repairing are integrated, so that the equipment redundancy can be effectively reduced, meanwhile, the requirement of large-scale bottom mud outward transportation and disposal can be omitted, and the transportation and landfill cost is greatly reduced.

The invention provides a water storage area hydrological condition information calculation method and device and related equipment, and the method comprises the steps: obtaining the water level data of a water inlet of a water storage area and the sediment deposition data of a target area in the water storage area; according to the water level data, the water flow speed of the target area in the target time period is calculated; calculating the sediment transport rate of the target area in the target time period according to the water flow velocity and the sediment deposition data; and hydrological condition information of the water storage area is obtained through calculation according to the water flow speed and the sediment transportation rate. Therefore, compared with a mode of manually calculating the hydrological condition information of the water storage area, the method can remarkably improve the calculation efficiency of the hydrological condition information of the water storage area.

The application discloses a ship sediment filtering system, which comprises a sea gate, a filtering device and a water pump, the sea gate comprises an input port and an output port, the input port is provided with a coarse filter grid, the inner bottom of the sea gate is provided with an inclined sedimentation plate which is inclined to the input port, the inner top of the sea gate is provided with a downwardly extending spoiler, the input end of the filtering device is connected with the output port, the input end of the filtering device is provided with a first water inlet valve, the filtering device is provided with a filter layer, the input end of the filtering device is communicated with the output end of the filtering device through the filter layer, the output end of the filtering device is provided with a first water outlet valve, the input end of the water pump is connected with the output end of the filtering device, and the output end of the water pump is connected with a ship water equipment. The application can filter the sediment in turbid seawater, deliver clean seawater to the ship water equipment, thereby guaranteeing the equipment reliability, and has high filtering efficiency. The application also provides a ship sediment filtering method.

The invention discloses a pit throwing site selection and mud throwing strength planning method and system in sea reclamation engineering. The method comprises the steps that firstly, a hydrodynamic mathematical model and suspended load sediment transportation are constructed through a two-dimensional shallow water equation and a convection diffusion equation; secondly, on the basis of the established mathematical model, a model capable of being applied to an actual project is formed through a parameterization means by combining the actual situation of the project, and finally the loss rate calculation under different pit throwing positions and mud throwing strengths is carried out through the general model. According to the scheme, multi-dimensional information such as construction time, mud blowing ship construction parameters, hydraulic reclamation construction data and soil texture detection reports is comprehensively considered, and an advanced numerical simulation technology and a flow field analysis method are introduced, so that the silt loss rate under different working conditions is accurately predicted; meanwhile, according to the scheme, direct planning of pit throwing site selection and mud throwing strength is concerned, prediction and control of the wastage rate are indirectly optimized by introducing numerical simulation and flow field analysis, and therefore systematicness and comprehensiveness of sea reclamation project planning are enhanced.

The utility model discloses channel dredging spoil mud and sand separation treatment equipment which comprises a flushing tank, the bottom of the flushing tank is communicated with a settling tank, the left side of the top of the flushing tank is communicated with a flushing water pipe, and the right side of the top of the flushing tank is communicated with a mud and sand conveying pipe. The oscillating hammer is driven by the driving motor to rotate to be in discontinuous contact with the bottom of the sieve plate, so that the right side of the sieve plate shakes up and down to shake off large gravel above the sieve plate into the separation pipe, then the large gravel falls into the coarse sand box to be collected, and the large gravel enters the coarse sand box and then is filtered through the filter plate; water containing fine gravel and soil flows into the settling tank to be settled, and fine sand grains can be discharged through the sand discharging valve pipe, so that large-particle stones and gravel in silt can be conveniently separated, coarse and fine sand can be conveniently screened, large stones are prevented from entering a pipeline to cause pipeline blockage, and the screened sand can be conveniently taken out; and the use of a user is facilitated.

The invention relates to the technical field of sediment conveying, in particular to an intermittent conveying system which comprises a conveying mechanism, a sediment receiving mechanism and a control circuit, the conveying mechanism is composed of a conveying belt, conveying wheels, a motor, a belt wheel and a belt, and the sediment receiving mechanism comprises a plurality of sediment receiving frames arranged on the conveying belt in a matrix mode. The control circuit comprises a power supply and a wheel disc conductive mechanism. The wheel disc conductive mechanism is composed of a mounting plate, a conductive rod, a driving motor and a plurality of conductive sheets. In addition, the adjacent sand receiving frames are communicated through pipelines, filter screens are arranged in the sand receiving frames, the control circuit may be provided with slide rheostats, the conveying wheels may be gears, the conveying belt may be an inner toothed belt, and the system may further comprise a conveying table. The technical effects that intermittent conveying of materials is achieved, sand is filtered, and the conveying speed is convenient to adjust are achieved.

The invention discloses a hydrogeological prospecting drilling device and method, and relates to the technical field of drilling device.The hydrogeological prospecting drilling device comprises a bottom plate, a top plate is fixedly connected to the upper portion of the bottom plate, and a prospecting fine adjustment assembly is arranged on the top plate; a threaded rod rotates to drive a transverse plate to move back and forth in the vertical direction, a second servo motor is started to drive a movable plate to move back and forth in the horizontal direction, an ore prospecting storage assembly is arranged on the movable plate, and a V-shaped block, a bending spring and a transparent storage box are movably connected to the drilling pipe. A third servo motor is started to drive a rotating thread and a drill bit to rotate, a spiral rod rotates to convey silt to the outside, an extrusion block stores part of the silt, a motor is started to drive a moving rod to push a pushing pipe, and a V-shaped block moves along a bending spring in the pushing process of the pushing pipe; sediment can be stored in the transparent storage box.

The invention discloses a sediment suction device, and particularly relates to the technical field of channel sediment cleaning, the sediment suction device comprises a sediment transportation device, a supporting plate is mounted on the sediment transportation device, a plurality of sediment suction pipes connected with one another are arranged on one side of the supporting plate, and the bottom end of the sediment suction pipe at the bottom is connected with a mud mixing frame; and a rotating rod is rotationally connected to the interior of the fixed mounting frame, and a spiral blade is fixedly arranged at the outer end of the rotating rod. A silt layer is stirred through a plurality of rotating connecting rods, thick silt is conveyed into a silt mixing frame through spiral blades to be mixed with water, silt suction is easy and convenient, the suction speed can be increased, the situation that a silt suction pipe is blocked due to the fact that the silt is too thick is avoided, and the silt suction efficiency is improved. Suction and cleaning of silt can be continuously carried out, the silt suction and cleaning efficiency is effectively improved, and the overall suction and cleaning effect is good.

The invention relates to the technical field of river channel cleaning, and discloses a height-adjustable sediment collecting device for assisting hydrological river channel cleaning, which comprises a gantry type rack, a connecting structure, a sediment collecting structure, a rotating structure, a driving structure, a water pressing structure, a pressing structure and a sediment transporting structure, wherein a sliding frame is assembled on the gantry type rack in a sliding manner, and a hydraulic cylinder is mounted on the sliding frame; wherein the connecting structure is arranged at the telescopic end of the hydraulic cylinder, and the connecting structure comprises two telescopic frames which are arranged oppositely. By introducing the forward and reverse rotation design of the reciprocating type linear driving module and the two screen drum structures, efficient dehydration treatment of the collected silt is achieved, the water content of the silt can be remarkably reduced through the innovative design, and the treated silt is easier to transport, store and reuse.

The invention relates to the technical field of coast engineering analysis, in particular to a sandy coast stability-oriented multi-factor coast system restoration optimization method, which comprises the following steps of: identifying a to-be-restored section which faces a serious erosion or degradation problem in a target sandy coast; setting a repairing target; constructing a multi-factor restoration scheme set comprising engineering measure factors and ecological measure factors; based on simulation of a preset hydrodynamic force-sediment transportation coupling model, an evaluation index of each restoration scheme simulation result is extracted; comparing the evaluation index of each repair scheme with a repair target, and calculating a comprehensive benefit value of each repair scheme; selecting the restoration scheme with the highest comprehensive benefit value as an optimal restoration scheme; and outputting an optimal repairing scheme. According to the method, each restoration scheme is converted into a physical input scene in the model by establishing the hydrodynamic force-sediment transportation coupling model, and the dynamic response of the restoration scheme to shoreline change and vegetation survival is simulated and predicted.

The invention discloses a sediment scouring and back silting balancing device for a connecting section of a seabed vertical pipe and a flat pipe, which comprises a support frame, an anti-scouring assembly and a sediment back silting mechanism, and the anti-scouring assembly is fixed at the top end of the support frame; the anti-scour assembly is arranged to be capable of reducing the flow speed of ocean currents and preventing part of silt in the ocean currents of the scour connection section from being taken away and falling around the silt back-silting mechanism. The silt back-silting mechanism is installed on the inner side of the supporting frame and can convert kinetic energy of ocean currents into kinetic energy of the silt back-silting mechanism so as to convey silt below the silt back-silting mechanism to the joint section of the vertical pipe and the flat pipe on the seabed, and by arranging the anti-scour assembly and the silt back-silting mechanism, the silt scour and back-silting balancing function of the joint section of the vertical pipe and the flat pipe is achieved; a series of problems caused by loss of support of the bottom of the vertical pipe due to suspension of the connecting section are avoided, and the connecting section is protected; the whole device can be arranged according to the actual ocean condition and the pile foundation arrangement condition and can be recycled and reused, and the economic cost is saved.

The invention discloses a slope collapse occurrence risk prediction method based on connectivity and a geographic detector, and the method comprises the steps: converting a comprehensive soil erosion index and an impact factor into characteristic parameters of a type variable in a discretization mode, carrying out the multi-collinearity analysis of all characteristic parameters, and filtering out the collinearity characteristic parameters; calculating the explanation intensity of the collapse occurrence risk of the characteristic parameters in the target area and the collapse occurrence frequency of sample points in different grids by using a geographic detector, and accumulating the product of the collapse occurrence explanation intensity and the occurrence frequency corresponding to different characteristic parameters in each grid; and obtaining a slope collapse risk space prediction distribution map about the target area. The method has the beneficial effects that by combining soil erosion and sediment transportation potential, the interpretation strength of each characteristic parameter on collapse slope occurrence is analyzed by utilizing the geographic detector, so that a high-accuracy collapse slope risk assessment result is obtained.

The application discloses a spiral river dredging and silt conveying equipment, which comprises a ship body, a working bin is formed in one side of the ship body, a collecting cavity is hollowed in the other side of the ship body, a driving assembly is installed in the working bin, one end of the driving assembly is fixedly connected with the bottom of one end surface of a movable plate, the movable plate is movably arranged in the working bin, the top of the one end surface of the movable plate is fixedly connected with one end of a material pressing assembly, the middle part of the material pressing assembly is hingedly connected with a support, the bottom end of the support is fixedly connected with the top end of the ship body, the other end of the material pressing assembly is fixedly connected with a pressing disc, the bottom of the pressing disc is provided with a feeding hopper, the feeding hopper is fixedly connected with the top end of the ship body, the top of the feeding hopper away from the pressing disc is provided with a tubular screw conveyor, a plurality of supporting seats are fixedly connected with the tubular screw conveyor, the bottom end of each supporting seat is fixedly connected with the bottom end of the ship body, the top of one end of a feeding pipe is fixedly connected with the top of the other end of the tubular screw conveyor, the other end of the feeding pipe is fixedly connected with one end of a connecting hose.

The utility model discloses a double-layer cofferdam for an anti-scouring bridge, which comprises an inner cofferdam, an outer cofferdam positioned on the outer side of the inner cofferdam and at least one protection unit positioned on the outer side of the outer cofferdam and used for conveying silt on the downstream of the outer cofferdam to the upstream of the outer cofferdam, the outer cofferdam comprises a tip upper outer cofferdam plate facing the water flow direction, two side outer cofferdam plates connected with the tip upper outer cofferdam plate through positioning columns and a lower outer cofferdam plate connected with the two side outer cofferdam plates. According to the utility model, the problem of sediment loss caused by river scouring near the cofferdam is solved.

The invention provides a multi-pit-pond area sediment transport ratio optimization calculation method and system, and relates to the technical field of water and soil conservation and sediment transport, and the method comprises the steps: obtaining grid data (such as type, area, water storage capacity, hydraulic retention time and hydrological characteristics) of pits and ponds; calculating sediment interception efficiency and a water flow delay factor; the confluence time is optimized; iteratively calculating the sediment transportation influence; and the sediment conveying ratio is optimized. According to the method, the silt conveying prediction accuracy is improved, the unique characteristics of the multi-pit pond area are reflected, and support is provided for drainage basin silt management.