81 results about "River flood" patented technology

The invention relates to a quick river flood forecasting method based on a physical information neural network, and belongs to the field of river flood forecasting. The method comprises the following steps: on the basis of a traditional physical information neural network (PINN), introducing a boundary condition parameter as an input variable, and enabling the PINN to learn a flood wave propagation rule under different boundary conditions. Furthermore, on this basis, a physical information neural network flood fast forecasting framework (RFF-PINN) integrated with a hydrodynamic method is provided, a numerical solution based on grid discretization is reconstructed into a continuous function in a time-space domain through a piecewise polynomial interpolation method, residual error loss between network output and a hydrodynamic model simulation value is constructed, and therefore, a flood fast forecasting result is obtained. The network parameters are optimized in cooperation with the PDE loss, and the problem that the network parameter optimization effect is reduced due to the fact that the PDE loss of the complex flow state area is difficult to converge is solved. The method has the beneficial effect that the water depth change process of each section of the river channel under any boundary condition can be accurately and quickly predicted.

The invention relates to a river flood flow monitoring method based on remote sensing image and hydrodynamic model fusion, and belongs to the technical field of flood monitoring. The method comprises the following steps: dividing flood levels in a river drainage basin by combining historical rainfall and flood conditions, drawing flood hydrographs of different flood levels, determining 24-hour design rainstorm of each level of flood, establishing a river one-dimensional hydrodynamic model by utilizing section survey data, and constructing a water level-water surface width relationship of a section to be measured; solving the model to obtain a water level-flow relation curve of riverway water rising and water recession under each level of flood, determining the recurrence level of the flood, calculating the current water surface width of the to-be-measured riverway section, obtaining the corresponding water level, and calculating the water level of the to-be-measured riverway section. And selecting a corresponding water level-flow relation curve according to the flood level of the river channel and the stage of the flood flow process, and substituting into the curve to obtain the flood flow of the section to be measured in the current time period. According to the method, through water level inversion of different levels and different stages, the accuracy of inversion of the flood peak flow by the satellite remote sensing image is improved.

The invention relates to a basin flood simulation optimization method based on a physical information neural network, and aims to construct a basin flood acceleration solution mode based on PINNs, and ensure the continuity and the physical characteristics of mass conservation during model operation, and the method comprises the following steps: simulating basin flood by using an urban flood space-time simulation model; obtaining a data set required for constructing the physical neural network; physical rules are integrated and simplified into limiting conditions, so that integration of a neural network structure is facilitated; establishing a partial differential equation (PDE) used for describing river flood routing, and taking the partial differential equation as a loss function of the physical information neural network model; constructing and training a PINNs drainage basin flood model constructed on the basis of a CNN (Convolutional Neural Network); and establishing a model evaluation index and performing evaluation. The method has the beneficial effect that the speed and precision of basin flood simulation are improved.

The invention relates to the technical field of hydrodynamic simulation, in particular to a lateral coupling method of a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model. The method comprises the following steps: collecting topographic data in a large section of a river channel and flood control protection areas on both sides of the river; constructing a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model based on the topographic data; determining a common edge of the one-dimensional hydrodynamic model and the two-dimensional hydrodynamic model; according to the relative position of the water level of each common edge in the one-dimensional cell of the river channel side and the midpoint of the common edge, combining an approximate Riemann solver to obtain the numerical flux of each common edge; obtaining a new time layer variable value of the two-dimensional hydrodynamic model by adopting an approximate Riemann solver; and obtaining a new time layer variable value of the one-dimensional hydrodynamic model according to the condition that the river flood overflows the embankment on the shared edge of the two sides of the one-dimensional cell and the numerical flux and the water level of the two sides of the one-dimensional cell, and outputting a calculation result. The stability of the model calculation process is ensured, and the reliability and practicability of the model are improved.

The invention discloses a knowledge graph-driven line storage space joint optimization scheduling model construction method. The method comprises the following steps: determining an optimal scheduling target and an overall target function of row storage space joint flood control scheduling, and setting constraint conditions; under a knowledge graph theoretical framework, constructing a response relationship between single-class line storage space scheduling and a river flood discharge state; selecting an excess peak water level exceeding a river embankment control water level as a coordination variable, decomposing the overall objective function into system association constraint equations of a river embankment, a reservoir, a flood storage and detention area and a flood drainage pump station, and reducing a multi-class line storage space joint scheduling problem into a problem of optimization scheduling of each single-class line storage space scheduling; and respectively solving by adopting an improved particle swarm algorithm to obtain an optimal scheduling process of each single-class line storage space. The method not only solves the problem that global optimum is difficult to ensure by directly applying a traditional optimization algorithm due to many row storage space optimization targets and a competitive relationship, but also reduces the calculation time of the model.

The invention relates to a mountain river flood dynamic rehearsal method, device and equipment based on big data fusion and a medium. The method comprises the following steps: acquiring a multi-source fusion data set of a target mountain river; based on the multi-source fusion data set, recognizing the flood type of the target mountain river in combination with a preset threshold rule to obtain the flood type and cause parameters; according to the flood type and the cause parameter, calculating a design flood peak flow value of each node in the target mountain river; according to each design flood peak flow value, performing section-by-section trial calculation through an energy equation to obtain a design flood surface line; and performing dynamic simulation processing on the flood routing process of the target mountain river based on the designed flood water surface line, and generating a flood routing dynamic simulation report of the target mountain river. The method can accurately adapt to the characteristics of diverse causes and complex propagation process of flood in a mountain river, and remarkably improves the refinement degree and reliability of flood rehearsal.

The invention discloses a river flood control influence analysis method based on a graph neural network, and the method comprises the following steps: S1, collecting terrain, hydrology, weather and water flow data, and constructing a graph structure model; s2, generating node and edge features, and forming a graph model; s3, inputting the graph model to a Laplacian network, and generating graph feature representation; s4, combining real-time data updating features, and constructing a dynamic graph model; s5, executing neighborhood sampling, and constructing a local subgraph; s6, inputting an attention mechanism, and generating an attention graph representation; s7, inputting a graph generation module, simulating a flood situation, and generating an expansion graph structure; and S8, training the dynamic graph model, and outputting a flood range, a risk level and flood control measures. According to the invention, graph modeling and reasoning integration of flood control analysis is realized.

The invention belongs to the technical field of unmanned aerial vehicle testing, and provides a river flood testing system based on unmanned aerial vehicle carrying, which comprises a sensor integration module used for integrating a Beidou positioning module, a radar wave depth and velocity measurement sensor, a high-resolution camera, an infrared sensor and a multispectral sensor; the data fusion module is used for fusing data from the sensor integration module; the automatic flight control module is used for planning a flight path of the unmanned aerial vehicle; the intelligent data analysis module is used for analyzing the image captured by the high-resolution camera; the environment adaptability module is used for realizing real-time obstacle avoidance and environment perception; the user interface and data visualization module is used for monitoring the state of the unmanned aerial vehicle and checking data in real time; by integrating various sensors and an advanced data processing algorithm, the real-time performance and accuracy of river flood monitoring are remarkably improved, the monitoring range is not limited by a fixed monitoring station due to the flexibility of the unmanned aerial vehicle, and a wide area can be rapidly covered.

The invention discloses a river function vulnerability evaluation method and device, a medium and a product, and relates to the technical field of hydraulic engineering and river ecological evaluation.The method comprises the steps that river basic information is obtained; determining index data of river function vulnerability evaluation; constructing a judgment matrix of the index data by utilizing an analytic hierarchy process; calculating a weight vector of the index data according to the judgment matrix; according to the river basic information and the river flood control standard, performing quantitative score assignment on the index data to obtain a score assignment result; calculating a function comprehensive score of the river according to the weight vector and the score assignment result; the function comprehensive score is used for evaluating the river function vulnerability. By introducing the analytic hierarchy process and the multi-index scoring system, a comprehensive evaluation system is constructed from four aspects of river flood control, navigation, water supply and ecology, the river function vulnerability can be reflected more scientifically and comprehensively, and a reference is provided for river management and governance.

The flood prevention device comprises a flood prevention gate mechanism, the flood prevention gate mechanism comprises a river channel body, a trash holding and cleaning mechanism is installed on the front portion of an inner cavity of the river channel body, and a U-shaped concave frame is fixedly connected to the interior of the flood prevention gate mechanism by forming an opening; and a sealing groove is formed in the inner side of the U-shaped concave frame. According to the flood prevention device and method for the river drainage basin, the flood prevention gate mechanism and the trash holding and cleaning mechanism are used in a combined mode, through the arrangement of the two mechanisms, flood prevention can be conducted on a river channel body through a gate body, and meanwhile sundries in a river are intercepted and collected through an intercepting net plate; and when the gate body and the intercepting net plate are cleaned subsequently, linkage between the structures can be used for unlocking and overturning the intercepting net plate after the gate body ascends, so that workers can conveniently clean the intercepting net plate, and the practicability is improved.

The invention provides a hydrodynamic model-based mountain river flood diversion tunnel line and scale optimization design method, which comprises the following steps of: constructing a one-dimensional hydrodynamic mathematical model of a research area drainage basin by adopting MIKE11 software, and constructing a one-dimensional hydrodynamic model of the research area drainage basin according to the one-dimensional hydrodynamic mathematical model of the drainage basin, boundary conditions and calibrated comprehensive roughness; and calculating designed flood water surface lines of different frequencies of the urban section. According to the actual situation of a city, aiming at urban flood causes and main problems existing in a current flood control system, engineering measure schemes such as flood control reservoir construction, beach retreating and river returning, river regulation, embankment heightening and flood diversion channel building are proposed, and a flood diversion tunnel route and planning optimization research is developed on the basis of a hydrodynamic model. Numerical simulation of flood disasters is completed by means of the modern information technology, a complete disaster prevention and control system is established for achieving the purposes of scientization, high efficiency and automation of disaster prevention and relief decision, the urban flood prevention capacity can be comprehensively improved, and the life and property safety of the masses is guaranteed.

The invention discloses a portable flow measuring device for hydrological measurement, and belongs to the technical field of detection. The device comprises a box body A, a box body B and a driving assembly, a radar current meter and an acoustic Doppler current meter are installed on the two sides of the box body B, and the box body A moves along a rod body or a rope through the driving assembly. The detection balance system collects environmental parameters such as water surface roughness, wind speed, particle content and water depth in real time, a radar and acoustics confidence model is constructed through normalization processing, sensor weights are dynamically distributed in combination with a height change function, and finally a high-precision detection result is output through a flow velocity model. Through multi-source data fusion and an adaptive algorithm, the problem of insufficient reliability of a single sensor in a complex environment is solved, and the system has the advantages of portability, robustness and high precision, and is suitable for river, flood and field hydrologic monitoring.

The invention discloses an embankment gushing risk evaluation method based on an embankment gushing formation mode, and the method comprises the steps: constructing the formation mode of the embankment gushing risk through employing the outboard flood occurrence probability as a triggering premise, employing a riverbed instability coefficient as a disaster-causing factor, and employing the stability degree of an embankment as a resistance capability; according to the calculation method for obtaining the embankment gushing risk according to the evaluation model, the embankment gushing risk can be quantitatively analyzed and calculated, the embankment gushing risk point can be effectively recognized, the weak river reach of the embankment can be defended in a targeted mode, passive water safety incident handling is changed into active water safety risk prevention and control, and the method is the key for guaranteeing the flood control safety of the river channel. And the method is universal for safety protection of other river dikes in the world, and has popularization significance.

The application relates to a river flood discharge capacity dynamic evaluation and hydrological early warning method. The method comprises the following steps: based on a parameter sensitive observation subset, sequentially updating an initial hidden variable in a low-dimensional hidden space through an unscented particle filter algorithm to obtain an optimized hidden variable, and inputting the optimized hidden variable into a river dynamic resistance field generator based on an initial dynamic roughness field to perform decoding processing to obtain a dynamic roughness field of a current period; based on the dynamic roughness field and a state sensitive observation subset, performing analysis and update processing on a state variable field of a hydrodynamic model through a deterministic ensemble Kalman filter algorithm to obtain an assimilated water level field and a flow velocity field; according to the water level field, the flow velocity field and the dynamic roughness field, the maximum flood discharge capacity of a section is calculated in combination with dike top elevation data, and a flood discharge capacity dynamic index is calculated based on the maximum flood discharge capacity of the section and a current actual flow. The method can realize real-time dynamic quantification of river flood discharge capacity and predictive evaluation of flood risk.

The invention discloses a device and a method for testing influence of river and canal flood on variable slope pipe network drainage and ground surface submerging, and relates to the field of urban flood. A water tank lifting assembly can ascend and descend, and a water tank can move relative to the water tank lifting assembly, so that the gradient of the water tank can be adjusted; the inspection well lifting assembly can ascend and descend and can move so that the gradient of the underground pipe network can be adjusted, the effluent weir comprises a weir plate which can move in the height direction of the testing device, and the weir plate is used for adjusting the water level in the river channel. Therefore, the gradient of the water tank is adjusted through the water tank lifting assembly, the gradient of the underground pipe network is adjusted through the inspection well lifting assembly, and the weir plate is used for adjusting the water level in the canal. The test device can accurately simulate the influence degree of the dynamic change of the water level of the canal on the drainage of the urban variable-gradient pipe network and the range and depth of surface submerging under the combined situation of different surface incoming flows and pipeline incoming flows, and provides decision support for urban flood risk management and urban drainage system design.

The present invention discloses a deformation detection method and system for a river flood control wall, which determines a corresponding warning data set according to a vertical settlement parameter, a lateral displacement parameter, and a corresponding warning threshold, and is compatible with multiple interactions of the vertical settlement parameter, the lateral displacement parameter, and the corresponding warning threshold, thereby ensuring the accuracy of the warning data set, and thus ensuring the accuracy of the warning image. Furthermore, multiple judgments are made on non-similar feature sets and warning data sets, and the recognition results of the non-similar feature sets and the deformation results of the warning data sets are output. The deformation results of the river flood control wall are determined according to the recognition results of the non-similar feature sets, the deformation results of the warning data sets, and the result matching table, realizing multi-dimensional control of the recognition results of the non-similar feature sets, the deformation results of the warning data sets, and the result matching table, ensuring multi-level control of the deformation results of the river flood control wall, and thus ensuring the accuracy of the deformation results of the river flood control wall.

The present invention discloses a portable flow measuring device for hydrological testing, which belongs to the field of detection technology. The device includes a box A, a box B and a drive assembly. Radar flowmeters and acoustic Doppler flowmeters are installed on both sides of box B, and box A moves along a rod or rope through the drive assembly. The detection and balancing system collects environmental parameters in real time, such as water surface roughness, wind speed, particle content, water depth, etc., constructs radar and acoustic confidence models through normalization processing, dynamically allocates sensor weights in combination with the height change function, and finally outputs high-precision detection results through the flow rate model. The present invention solves the problem of insufficient reliability of a single sensor in a complex environment through multi-source data fusion and adaptive algorithms. It has the advantages of portability, robustness and high precision, and is suitable for river, flood and field hydrological monitoring.

The invention relates to the technical field of river channel flood discharge, and discloses an anti-backflow river channel flood discharge flow guide device. Comprising a flood discharge mounting part, a siphon drainage part is mounted on the flood discharge mounting part, and a water diversion stop part is mounted at the bottom of the siphon drainage part; the water diversion stop part is used for preventing water in the siphon drainage piece from flowing back; a water level detection part is mounted on the flood discharge mounting piece; the water level detection part is used for detecting the river water level; the siphon drainage piece is adopted, siphon drainage work can be achieved, the drainage efficiency is guaranteed, the siphon does not need to be grooved and buried in the river channel construction process, the siphon effect is directly utilized for suction, the river channel embankment cannot be damaged, and the problems that according to an existing river channel flood discharge flow guide device, fixed point position pipe burying is mostly adopted, siphon drainage is inconvenient to achieve, and the construction cost is low are solved. And the construction difficulty is high.

The invention relates to the field of flood control risk prediction, in particular to a river flood control risk prediction analysis system based on a water conservancy model, and the system is provided with a twinborn monitoring module which is used for continuously obtaining water conservancy data of a target river region according to a preset monitoring frequency, and constructing a corresponding twinborn model; the feature recognition module is connected with the twinborn monitoring module and is used for analyzing collapse features based on a twinborn model; the type division module is connected with the feature recognition module and is used for evaluating a diffusion characterization value according to the collapse features in combination with the minimum distance between the edges of the adjacent sunken regions so as to divide the diffusion tendency types of the sunken regions; and the prediction analysis module is connected with the type division module and is used for adaptively detecting and analyzing the sunken area based on the diffusion tendency category, the detection efficiency of the dike breach is improved, and then support is provided for implementation of rapid plugging.

The utility model relates to the technical field of river flood control monitoring devices, in particular to a river flood control monitoring and early warning device which comprises a supporting column, a monitoring assembly is arranged on one side of the supporting column and comprises four guide rods, a lower floating plate is connected to the four guide rods in a sliding mode, and a lifting plate is fixedly installed on the top face of the lower floating plate. The lifting plate sleeves the guide rods and is slidably connected with the guide rods, an upper floating plate is fixedly mounted on the top surface of the lifting plate, inclined planes are arranged on the left side and the right side of the top surface of the lower floating plate, an assembly frame is fixedly mounted on the bottom surface of the lower floating plate, a monitoring module is fixedly mounted on the assembly frame, and a fixed base is fixedly mounted at the bottom ends of the guide rods. A fixing frame is fixedly installed among rod bodies at the bottom ends of the four guide rods, and a top plate is fixedly installed on the top faces of the four guide rods. According to the utility model, the automatic height adjustment operation of the monitoring module is facilitated, so that the monitoring module floats on the water surface for monitoring more smoothly.

The invention belongs to the technical field of hydrological forecasting, and discloses a river flood forecasting method, system, equipment and medium based on a hydrological model, and the method comprises the steps: obtaining the historical hydrological data of a research area, carrying out the rainfall-runoff trend analysis of the research area based on the historical hydrological data, and obtaining the historical rainfall runoff data of the research area; interpolating the rainfall capacity of the research area based on rainfall data in the historical rainfall runoff data to obtain a rainfall spatial distribution diagram of the research area; performing watershed digitization by using watershed original DEM data of the research area to obtain river network form information after sub-watershed division, and calculating a CN value of each sub-watershed; constructing a river flood forecasting model; and inputting the real-time hydrological data of the research area into the river flood forecasting model for forecasting to obtain a forecasting result, and finishing forecasting. According to the technical scheme of the invention, a numerical weather forecasting and hydrological model coupled flood forecasting system can be constructed, and the forecasting period can be effectively prolonged.

The present application belongs to the technical field of water conservancy engineering, and provides a river flood control and drainage system, including a pump station, a screen cleaner, a sand pump, a first auger loosener and a crushing assembly; the sand pump and the first auger loosener are both arranged near the riverbed, and the sand pump is located between the gate of the pump station and the grille of the screen cleaner; the first auger loosener is located on the side of the screen cleaner away from the sand pump; the crushing assembly includes a first wolf tooth roller and a second wolf tooth roller, and the rotating shafts of the first wolf tooth roller and the second wolf tooth roller are both perpendicular to the riverbed. The river flood control and drainage system of the present application can use the crushing assembly to squeeze and crush the stones and large-volume debris mixed in the flood into small-volume fragments, and clean them through the screen cleaner; the first auger loosener is used to stir the sediment in the flood to avoid sedimentation, and at the same time, it is combined with the sand pump for cleaning, thereby solving the problem of cleaning sediment and stones during flood control and drainage, and improving the continuous operation capability of the facility.

The invention discloses a self-adjusting water gate structure based on a river flood season, which comprises a gate body, a gate plate capable of moving up and down is arranged in the gate body, the self-adjusting water gate structure further comprises a blocking assembly, a shifting assembly and a fishing assembly, the blocking assembly can move up and down along with the water surface, and part of the blocking assembly can float on the water surface; and the other part of the blocking assembly can be inserted into the water surface. During use, the gate body is installed in a water body, sundries such as branches can float on the water surface due to small buoyancy, the blocking assembly can block the sundries so as to prevent the sundries from penetrating through the gate body, and when the sundries are accumulated to a certain degree, the stirring assembly can stir the sundries so that the blocking assembly can rotate, and the sundries can be prevented from penetrating through the gate body. The blocking assembly is arranged on the water surface so that sundries floating on the water surface can be taken away from the water surface, then the fishing assembly can remove the sundries on the blocking assembly, and therefore the purpose of cleaning the sundries on the water surface is achieved, and after cleaning is completed, the blocking assembly is reset for use next time.

The present application relates to the technical field of river basin water environment management and water ecological evaluation, and particularly relates to a river flood season pollution impact evaluation method and system combining river basin spatial analysis and water ecological response. The method first collects water ecological data, pre-processes the water ecological data, calculates the water ecological metabolism background value before the non-flood season or the flood season pollution event based on the diurnal variation model of river dissolved oxygen concentration based on mass balance, calculates the theoretical lag time from rainfall to pollution peak value based on the correlation between the catchment area and the response time, and delimits the flood season pollution event window period. Based on the high-frequency monitoring data of the water ecology in the flood season pollution event window period, the water ecological metabolism response index is calculated, the disturbance intensity of the pollution event on the water ecological system metabolism function is evaluated, the non-point source pollution intensity index and the point source risk evaluation value are calculated, and the pollution source investigation suggestion is comprehensively generated. The present application effectively solves the problem of difficult definition of non-point source pollution responsibility in the flood season, and realizes the accurate identification of pollution sources.

The invention relates to the technical field of river channel flood discharge, and discloses a river channel flood discharge capacity improving method and device for a plain river network district, and the method comprises the steps: obtaining the upstream and downstream water surface ratio drop, the overflowing flow, the water level of regions on both banks and the submerging condition of both banks of a target flood discharge river channel in the plain river network district in a historical flood discharge period; the upstream and downstream water surface gradient, the overflowing flow, the water levels of the areas on the two banks and the submerging conditions of the two banks are analyzed, and the flood discharge level of the target flood discharge river channel is determined; if the flood discharge level of the target flood discharge river channel does not conform to the flood discharge capacity of the flood discharge river channel design, the pump station design flow and the pump station stage number are obtained, and a multi-stage relay water lifting pump station arrangement scheme is determined based on the pump station design flow and the pump station stage number; and the pump stations in the target flood discharge river channel are scheduled and operated by using the multi-stage relay water lifting pump station layout scheme. The flood discharge capacity of the river channel in the plain river network area is improved, and flood disaster loss and influence are reduced.

The invention relates to a water level real-time monitoring mechanism for river flood control. The water level real-time monitoring mechanism comprises a vertically-arranged monitoring column, a display part vertically and fixedly installed at the top of the monitoring column and an indication assembly installed between the monitoring column and the display part. A plurality of display areas are sequentially arranged on the display part from top to bottom; the indicating assembly comprises a vertical track fixedly installed on the monitoring column, a connecting rod slidably installed in the track, a buoyancy piece fixedly installed at the bottom of the connecting rod, and an indicating piece fixedly installed at the top end of the connecting rod and used in cooperation with the display piece. The system has the advantages that full-process automation from water level monitoring, visual warning and graded triggering to equipment self-maintenance is achieved, and the real-time performance and reliability of river flood prevention monitoring are remarkably improved.

This application discloses a river functional vulnerability assessment method, equipment, medium, and product, relating to the technical fields of water conservancy projects and river ecological assessment. The method comprises: obtaining basic river information; determining indicator data for river functional vulnerability assessment; constructing a judgment matrix for the indicator data using the analytic hierarchy process (AHP); calculating a weight vector for the indicator data based on the AHP; quantifying and assigning scores to the indicator data based on the basic river information and river flood control standards to obtain a scoring result; and calculating a comprehensive functional score for the river based on the weight vector and the scoring result. The comprehensive functional score is used to assess river functional vulnerability. By introducing the AHP and a multi-indicator scoring system, this application constructs a comprehensive evaluation system for river flood control, navigation, water supply, and ecology. This system can more scientifically and comprehensively reflect river functional vulnerability and provide a reference for river management and governance.

The present application relates to the technical field of hydrological simulation, and more particularly to a rainfall-runoff-concentration-evolution whole-process dynamic simulation system and method. The method comprises the following steps: obtaining basin topographic information and extracting basin boundaries; dividing grid cells according to the basin boundaries and setting river nodes using the grid cells; collecting rainfall data using a rain measurement radar; calculating runoff using the rainfall data; inputting the runoff into a pre-trained distributed concentration model for concentration analysis and recording the concentration flow; inputting the concentration flow and the river nodes into a river flood evolution model to perform river evolution simulation and generate river concentration data; determining the amount of water entering the main river according to the river concentration data; generating a flow time series according to the amount of water entering the main river; and predicting the flood peak flow based on the flow time series. The present application realizes accurate simulation of the hydrological process of a basin based on hydrological simulation technology, and improves the accuracy and timeliness of flood prediction and early warning.

The application discloses a navigation facility. The navigation facility comprises a deep navigation channel and a semi-submersible floating ship loader. The deep navigation channel is formed at the bottom of a normal navigation channel and passes through a bridge crossing a navigation channel. The semi-submersible floating ship loader is configured to float in the deep navigation channel with a controllable draught and is used for carrying a ship through the bridge crossing the navigation channel. The technical scheme provided by the application can solve the navigation requirement under the condition that the height of an existing bridge is limited, and also meets the requirements of not affecting the normal use of the bridge, river flood discharge in flood season, fish migration and the like.

A river flood prevention early warning system comprises a master control terminal and a monitoring terminal, the monitoring terminal comprises a vertical rod arranged on a reference plane, the vertical rod is connected with a radar water level gauge through a cross rod, and the radar water level gauge is located above a monitored liquid level; the vertical rod is a hollow rod, an alarm emitter and a storage battery are arranged at the position, higher than the datum plane, of an inner cavity of the vertical rod, the alarm emitter and the storage battery are not in contact, electric contact pieces are oppositely arranged on the adjacent sides of the alarm emitter and the storage battery, the position of the alarm emitter is fixed, and the storage battery is provided with a traction rope and is fixed to the hook through a water dissolving ribbon. And the storage battery can be electrically connected with the alarm transmitter after the water-soluble cable tie is broken. On the basis of existing flood prevention equipment, an alarm emitter and a storage battery which is used in cooperation with the alarm emitter and is fixed through a water dissolving ribbon are added, and after the water level reaches a certain height, after the water dissolving ribbon is dissolved, the storage battery can make contact with the alarm emitter, and then a water level early warning signal is sent out.