351 results about "Stream gauge" patented technology

The invention provides a hydropower station natural disaster intelligent early warning and emergency decision-making method and system based on multi-source data fusion and dynamic threshold optimization, and the method comprises the steps: collecting the water regimen data of a hydropower station and a drainage basin in real time through the deployment of a water level gauge, a rain gauge, a wind speed sensor and a thunder and lightning monitoring device, and combining weather forecast data and historical hydrological data, thereby achieving the intelligent early warning and emergency decision-making of the hydropower station. And dynamically calculating a disaster threshold value, and generating a graded early warning signal. The system comprises a data acquisition module, a dynamic threshold matching module, an early warning generation module, a case retrieval module, an information issuing module and a response tracking module. The early warning threshold is dynamically adjusted through multi-source data fusion and a machine learning technology, and the early warning accuracy is improved; a historical case library is constructed by using a knowledge graph technology, and intelligent recommendation of a disaster disposal scheme is realized; and early warning information and disposal suggestions are directionally pushed through multiple channels, so that the emergency response efficiency is improved. The conversion from passive response to active early warning is realized, and the influence of natural disasters on the operation of the hydropower station is obviously reduced.

The invention discloses an automatic monitoring system and method for hydrological data and a storage medium. The automatic monitoring system comprises a multi-modal data acquisition module, an edge intelligent processing module and a cloud platform. The multi-modal data acquisition module acquires water level, water quality and meteorological data in real time through a radar water level gauge, a multi-parameter water quality meter and a rain gauge, and transmits the data to the edge intelligent processing module; the module extracts and aligns spatio-temporal features through a multi-scale spatio-temporal convolution unit, an uncertainty quantization unit is fused with Bayesian to calculate confidence, and complete data or abstract features are selectively transmitted to a cloud according to an abnormal classification judgment result; the cloud platform fuses multi-source features through a space-time attention mechanism, dynamically adjusts an early warning threshold based on a near-end strategy optimization algorithm, aggregates edge node model parameters through a federated learning framework in combination with a homomorphic encryption technology, updates a global model, and then synchronizes the global model to edge nodes to form closed-loop optimization.

The invention belongs to the technical field of water conservancy monitoring, and discloses a water conservancy water level monitoring device and method, and the method comprises the steps: a monitoring point arrangement module of a monitoring mechanism reasonably arranges the number and positions of monitoring points; the flow velocity monitoring module monitors the water velocity; the meteorological data acquisition module acquires meteorological data; the echo sounder emits sound waves, and the water depth is calculated according to the sound wave propagation time and the sound velocity in water; the pressure water level gauge, the laser water level gauge and the radar water level gauge monitor the water level of water conservancy. The echo data analysis module analyzes the echo data; the comprehensive analysis module comprehensively analyzes the water level; the predictive analysis module predicts a water level trend and potential risks. The water level of water conservancy is monitored through various water level gauges, cross validation and high precision are achieved, and the sediment deposition thickness is accurately calculated by analyzing echo data; the comprehensive analysis module comprehensively evaluates the water level; the prediction analysis module integrates various monitoring equipment data and meteorological data, and predicts the water level trend and potential risks.

The invention relates to the technical field of water level measurement, in particular to a water level precision measurement method, system and equipment applied to a water conservancy project, and the method comprises the steps: obtaining an electromagnetic wave signal emitted to the water surface by a radar water level gauge in real time, recording the electromagnetic wave signal as an emission signal, and obtaining an echo signal received at each measurement moment; water level data, measured by the radar water level gauge through the received echo signals, at each measurement moment are obtained; calculating a signal fluctuation degree and an energy loss ratio of each measurement moment, determining a first evaluation value, a second evaluation value and a water level fluctuation degree of each measurement moment, and obtaining an interference coefficient of each measurement moment; and correcting the water level data based on the water level data and the disturbed coefficients of each measurement moment and a plurality of measurement moments before the measurement moment to obtain the corrected water level data of each measurement moment. The interference influence of the multipath effect, noise and water surface fluctuation on the echo signal can be reduced, and the precision of the radar water level gauge on the water level measurement result is improved.

The invention provides an inclined non-contact water level measurement method, and relates to the technical field of water level measurement, and the method comprises the steps: transmitting a high-frequency electromagnetic wave to a target water body region through a high radio frequency transmitting module according to an inclination angle; receiving the high-frequency echo signal, carrying out multi-path interference filtering and noise suppression, obtaining an optimized echo signal, and extracting the reflection time of the optimized echo signal; deploying an environment measurement sensor, and collecting real-time environment data of the target water body area through the environment measurement sensor; and constructing a water level measurement model, synchronizing the inclination angle, the reflection time, the real-time environment data and the reference measurement height to the water level measurement model for water level calculation, and determining a real-time water level value. The technical problem that in the prior art, due to multi-path interference and environmental noise influences, the water level measurement precision is insufficient is solved, and the technical effect of improving the water level measurement accuracy and reliability is achieved.

The invention provides a geothermal well water level gauge-based water level accurate measurement and monitoring management method, which comprises the following steps of: performing integrated monitoring deployment by combining various sensors, probe fixing guide rails and double probes; deploying an edge calculation module to obtain underground measurement data; performing drift correction and anti-interference detection on the sensor, and deploying a sensor standby channel; data storage and visualization are carried out; a safety threshold value is preset, a water level prediction model is constructed, water level anomaly detection is carried out, and fault cause tracing and strategy suggestion are carried out on anomaly; equipment linkage is carried out, real-time monitoring and remote automatic control are carried out, and health scoring and service life prediction of the equipment are carried out. The precision and reliability of water level measurement can be improved, timely and effective continuous monitoring and intelligent management are achieved, meanwhile, through cooperation of anomaly detection and automatic control, faults and risks are reduced, geothermal resources are protected, and manpower and operation cost is saved.

To solve the problems that a water level gauge and a flow direction gauge are likely to be washed away and even if they are out of order, it is difficult to notice.SOLUTION: A first image analysis device 1 in a flood gate opening / closing system comprises: a flow direction detection unit 17 that compares image data having imaging information from a first camera 11 with flow direction information learning data for indicating flow direction information set by image data based on multiple images, and obtains flow direction determination information; and a water level detection unit 15 that compares image data having the imaging information from the first camera 11 with water level information learning data for indicating water level information set by image data based on multiple images, and obtains water level determination information.SELECTED DRAWING: Figure 7

The invention relates to a rapid calculation method and system for reservoir flood regulation calculation based on a dynamic reservoir capacity curve, and the method comprises the steps: collecting reservoir area data, and constructing an initial reservoir area hydraulic model; collecting alignment samples including a calibration sample and an inspection sample, and inspecting the initial reservoir area hydraulic model by adopting the calibration sample and the inspection sample to obtain a reservoir area hydraulic model; extracting actually measured flood data, dividing into a plurality of incoming water schemes, setting different reservoir outlet flows for each incoming water scheme, inputting the different reservoir outlet flows into a reservoir area hydraulic model for calculation, obtaining sample nodes, and constructing a dynamic reservoir capacity curve graph; on the basis that the water level calculation process is continuous and the highest reservoir water level is equal to the dynamic reservoir capacity curve calculation value, the process forecast of the flood regulation water level in the predicted period is obtained through backward calculation by adopting a water balance equation period by period. According to the method, rapid and accurate reservoir flood regulation calculation under the influence of dynamic reservoir capacity is realized, a session flood reservoir water level forecasting process is provided, and more accurate reservoir water level forecasting information support is provided for reservoir regulation and flood and drought disaster prevention.

The invention discloses a water depth inversion method and device, a nonvolatile storage medium and electronic equipment. The method comprises the following steps: acquiring historical remote sensing image data and historical ground water level gauge data in a target area; inputting the second historical radiation brightness value into a physical model to obtain predicted water depth information output by the physical model; correcting the predicted water depth information by using the second historical real water depth information, and updating the physical model according to a correction result to obtain a target physical model; and inputting the current radiation brightness value into the target physical model to obtain target predicted water depth information output by the target physical model. According to the method and the device, the technical problem that the precision of an inversion result is relatively low due to the influence of factors such as a cloud layer, atmosphere and an earth surface type when an existing satellite remote sensing technology is used for performing large-range water depth inversion is solved.

The invention provides a pump station water level dynamic boundary adjusting method based on a fuzzy firefly algorithm, which comprises the following steps of: presetting a target water level in an intelligent water level monitoring system, calculating water level deviation and a water level change rate, and determining a sensitive parameter; presetting a linguistic variable of a fuzzy variable to obtain a fuzzy subset about a high-sensitivity parameter, a fuzzy subset about a low-sensitivity parameter, a fuzzy subset about a dynamic boundary adjustment value and a fuzzy subset about a flow adjustment value; determining a corresponding triangular membership function according to the input variables and the output variables of the different sensitive parameters; setting a fuzzy rule, and calculating the membership degree of each input variable; determining the fuzzy quantity output of the dynamic boundary adjustment value according to the fuzzy rule activation condition and the membership function value; and performing precision on fuzzy quantity output of the dynamic boundary adjustment value by adopting a gravity center method to obtain an accurate dynamic boundary adjustment value. According to the invention, the pump station can be controlled more accurately under various dynamic hydrological conditions.

The utility model discloses a water level gauge for water conservancy informatization measurement, and relates to the technical field of water level gauges, the water level gauge comprises a stand column, a base, a ladder stand rod and a pipe clamp, the bottom of the stand column is installed on the base, the pipe clamp is installed on the stand column, a rod cylinder is welded on one side of the pipe clamp, a rod body is movably inserted in the rod cylinder, and the rod body is connected with the ladder stand rod. By arranging the rod barrel, the rod body and the electric telescopic rod, the electric telescopic rod can start the rod body to move relative to the rod barrel, so that the distance between the water level gauge and the stand column is adjusted, and the requirement for water level line changes in flood seasons and dry seasons is met conveniently; according to the water level gauge, the clamping connection structure, the installation plate and the threaded locking handle are arranged, the installation plate and the clamping connection assembly can be rapidly fixed and detached through the threaded locking handle, the water level gauge can be conveniently installed and detached, and then the water level gauge can be conveniently maintained and replaced.

The invention relates to the technical field of water level monitoring, in particular to a water level early warning device for hydrological monitoring, which comprises a first mounting shell and a second mounting shell, a rotating block is rotatably mounted in a rotating frame, and the rotating block is driven to rotate by a second driving part mounted in the rotating block; a sliding block is installed on the lower portion of the interior of the movable column through a displacement mechanism, and a radar wave collector is fixedly installed on the lower portion of the interior of the sliding block. A measuring shell is fixedly connected to the end, away from the second motor, of the movable column, a cavity is formed in the measuring shell, a radar wave generator is rotationally installed in the cavity, and an adjusting part for adjusting the angle of the radar wave generator is arranged on one side of the radar wave generator. By means of the structural design, the water levels of the two sides and the middle position of a river channel can be effectively monitored, and compared with a radar water level gauge in the prior art, the monitoring range is larger, and the monitoring effect is better.

The utility model relates to the technical field of water level monitoring, in particular to a full-scale radar water level gauge, which combines a radar water level gauge with a pressure sensor, arranges the radar water level gauge and the pressure sensor in a pressure detection cover, and mainly monitors the height of a water level through the radar water level gauge. The internal air pressure of the pressure detection cover is gradually increased under extrusion of water, when the water level rises to the blind area distance of the radar water level gauge, the radar water level gauge cannot monitor the water level height, at the moment, the internal air pressure of the pressure detection cover is detected through the pressure sensor, the internal air pressure is compared with the external atmospheric pressure, and therefore the water level height is calculated; due to the fact that a certain amount of air exists in the pressure detection cover, even if the device is wholly submerged by water, the water in the pressure detection cover does not make contact with the radar water level gauge body, sediment or sludge or sundries are prevented from making contact with the radar water level gauge body and the pressure sensor, and the service life of the product is prolonged.

The utility model relates to an integrated radar flow meter which comprises a shell, a radar flow meter, a radar water level gauge, a gyroscope, an angle adjusting unit and an extending part. The radar flow velocity meter and the radar water level gauge are both located in the shell, the gyroscope is fixed to the top of the shell, and the angle adjusting unit comprises a transverse plate, two vertical plates, a motor, a transmission part and a fixed wheel; the extending direction of the transverse plate is parallel to the horizontal plane, one ends of the two vertical plates are connected with the two ends of the transverse plate respectively, the shell is located between the two vertical plates and rotationally connected with the two vertical plates, the motor is fixed to the transverse plate, the input end of the transmission part is in transmission connection with a rotating shaft of the motor, and the output end of the transmission part and a rotating shaft of the fixed wheel are collinear and fixed to the shell. The two ends of the extending part are fixed to the river bank and the transverse plate correspondingly, and the extending direction of the extending part is perpendicular to the extending direction of the transverse plate. The integrated radar flowmeter can control the motor to adjust the levelness according to the detection result of the gyroscope, and has the advantages of being integrated, accurate in adjustment and low in maintenance cost.

The utility model discloses radar water level gauge measuring equipment, and relates to the technical field of water level measurement. A supporting shell is arranged on the upper side of the bottom shell, a mounting shell is arranged on one side of the supporting shell, a lifting mechanism is arranged in the bottom shell, a sliding groove is formed in the lower side of the mounting shell, and a driving plate is arranged on the inner wall of the mounting shell in a sliding and elastic fit mode. By arranging the driving plate, after equipment is installed, the driving plate is rotated, the driving plate drives the winding roll shaft, under traction of the steel wire rope, the driving plate drives the radar flowmeter body to move, after the radar flowmeter body overcomes tension of the tension spring and is adjusted to the needed position, the clamping bolts are connected with the corresponding threaded grooves, and the radar flowmeter body is driven to rotate. The installation of the radar flowmeter main body is completed, the installation and use of measuring weir grooves with different widths are facilitated, the use range of the equipment is improved, meanwhile, the lifting mechanism is arranged in the bottom shell, the internal structure is prevented from being damaged, and the service life of the equipment is prolonged.

The invention discloses water conservancy project dam settlement real-time monitoring equipment, and belongs to the technical field of water conservancy project dam settlement monitoring. The water conservancy project dam settlement real-time monitoring equipment comprises an intelligent inspection vehicle for movably monitoring dam settlement on a base body around a dam, and the intelligent inspection vehicle is provided with a control box for receiving and transmitting signals and controlling monitoring; a moving seat is slidably mounted on the intelligent inspection vehicle, a moving frame is fixedly connected to the moving seat, and a distance sensor used for monitoring the distance from the dam surface so as to analyze the settlement condition is mounted on the moving frame; an upper steering arm is rotationally connected to the movable frame, a lower steering arm is movably connected to the lower portion of the upper steering arm, and a radar water level gauge used for monitoring the water level change in the dam so as to assist in analyzing dam settlement is fixed to the lower steering arm; the detection equipment can move on the dam to monitor the settlement conditions of different point positions, the distance sensor and the radar water level gauge can be rapidly controlled to be unfolded through the moving frame, the upper steering arm and the lower steering arm, the monitoring range is wide, and use is convenient.

The invention discloses an intelligent precipitation control system based on a foundation pit waterproof curtain and a water level control method, and belongs to the technical field of engineering construction.The intelligent precipitation control system comprises a cloud control system, a precipitation well, a water suction pump, a precipitation well water level meter and an observation well, the observation well water level meter and the waterproof curtain, and a foundation pit is defined by the waterproof curtain; a dewatering well is arranged in a foundation pit, a water suction pump and a dewatering well water level gauge are arranged in the dewatering well, N observation wells are arranged around an outer shaft of the foundation pit, observation water level gauges are arranged in the observation wells, the dewatering water level gauges send collected water level information in the dewatering well to a cloud control system, and the cloud control system controls the water suction pump to work. According to the intelligent precipitation control system based on the foundation pit waterproof curtain, through the technologies of automatic regulation and control, real-time monitoring, remote control, self-adaptive adjustment and the like, the precipitation efficiency, construction safety and economic benefits are remarkably improved, and manual intervention and resource consumption are reduced.

The invention discloses a water conveyance canal lining plate anti-floating stability online intelligent diagnosis and automatic early warning device and method. The device comprises a high-sensitivity water pressure sensor, an automatic water level gauge, a canal section geologic structure parameter acquisition module, a monitoring and diagnosis early warning controller and a remote monitoring terminal. The high-sensitivity water pressure sensor is arranged below the water surface of a first-stage riding track monitoring well of the water conveyance canal, the automatic water level gauge is arranged in inner side canal water, the monitoring and diagnosis early warning controller is in communication connection with the high-sensitivity water pressure sensor and the automatic water level gauge, and the remote monitoring terminal is in communication connection with the monitoring and diagnosis early warning controller. According to the method, the underground water level of the first-level riding track, the water level of the channel and the geological structure parameters of the channel section are collected in real time, an analytic formula method based on Dupuff assumption is innovatively provided for calculating the characteristic water depth of the underground water infiltration line of the channel slope, and the preset critical pressure difference judgment standard is combined; on-line monitoring, intelligent diagnosis and automatic early warning of the anti-floating stable state of the lining plate of the water delivery canal and the replacement fill stratum can be achieved.

The invention provides a radar water level gauge high-stability data processing and measuring method, which comprises the following steps that 1, a radar transmits an electromagnetic wave signal to the water surface, and the electromagnetic wave signal generates an echo when encountering the water surface and is received by a radar receiver; an effective signal and an invalid signal are distinguished by detecting the intensity of the echo signal, when the invalid signal is detected, a communication signal abnormity indication is sent out, and the reflected electromagnetic wave signal is set as original measurement data; step 2, processing echoes generated in the step 1 through an echo signal processing module in the radar receiver, obtaining median filtering processing data through median filtering, synchronously removing random noise through median filtering and reserving effective signals, and improving the stability of a measurement result; a median filtering module is arranged in the echo signal processing module; and step 3, processing the median filtering processing data in the step 2 through a median filtering processing module.

The invention relates to the technical field of water level identification, in particular to a water level calculation method based on triangulation network area weighting. The method comprises the following steps: arranging a plurality of water level observation stations, and recording spatial position coordinates of the water level observation stations; obtaining a time sequence water level observation value of each water level observation station in the observation period; extracting a corresponding instantaneous water level from the time sequence water level observation value according to the sampling time; establishing a triangulation relation according to the spatial positions of the underwater measuring points and the water level observation stations, calculating the area ratio between the underwater measuring points and the adjacent water level observation stations, and automatically reconstructing the triangulation relation and updating the area ratio when the number and the positions of the water level observation stations are changed; according to the invention, accurate identification of the water level of the underwater measuring point is realized through water level calculation, so that the identification accuracy and the calculation efficiency are improved.

The invention discloses a water surface evaporation capacity monitoring system with rainfall compensation and low-temperature protection functions. The water surface evaporation capacity monitoring system comprises a control assembly, an evaporation dish, a liquid level well logging assembly, a rain gauge, a water supplementing overflow assembly, a water supplementing tower and an overflow pool. The evaporation capacity calculation unit is used for estimating the rainfall capacity according to the water level data in the liquid level logging well and the rainfall capacity sent by the rain gauge, compensating the water level difference value in the liquid level logging well, and calculating the evaporation capacity; the low-temperature protection unit periodically receives the water temperature, sent by the magnetic telescopic water level gauge, in the liquid level logging well, and when the water temperature in the liquid level logging well is lower than a preset temperature threshold value, a drainage signal is sent to the overflow pump for drainage, so that the water level of the logging body is lower than a preset water level threshold value, and the overflow pump is kept in a normally-open state till the water temperature is higher than the preset temperature threshold value. Low-temperature protection can be carried out on equipment such as pipelines and pumps according to the environment air temperature, meanwhile, the evaporation capacity is compensated through the rainfall capacity, and the measurement precision of the water surface evaporation capacity is effectively improved.

The invention discloses an anti-waterlogging early warning device for a transformer substation, which relates to the technical field of flood prevention equipment and comprises a base plate and a vertical shell fixed on the base plate. The support is installed on the vertical shell and used for supporting a monitoring assembly; the water level monitoring module comprises an ultrasonic water level gauge assembled on the vertical shell through a bracket; the data collector and the wireless communication module are assembled on the vertical shell through a mounting shell, and the wireless communication module is used for transmitting monitoring data; and the power supply module comprises a solar photovoltaic panel and a power supply box which are arranged on the vertical shell and are adjustable in angle. According to the anti-waterlogging early warning device for the transformer substation, the problem that key components of an existing anti-waterlogging early warning device are prone to being damaged by external force to cause failure of the device in severe snow and hail weather is solved.

The invention relates to the technical field of environmental monitoring, and discloses a self-adaptive data noise reduction method based on environmental characteristics and applied to a chemical industry park. The method comprises the following steps: S1, detecting environmental characteristics of the static pressure water level gauge, and starting a cleaning mode of the static pressure water level gauge based on the environmental characteristics; s2, acquiring water level information based on a static pressure water level gauge, and acquiring turbidity information based on a turbidity sensor; s3, the turbidity information is corrected based on historical tide data, and the historical tide data comprise historical water level information and historical turbidity information. The method has the advantages that the method adapts to complex tidal modes and environmental changes, the accuracy and reliability of turbidity monitoring are remarkably improved, and meanwhile certain anomaly detection and self-adaptive capacity is achieved.

The invention discloses a flood situation detection method and device based on big data hyper-fusion and a medium. The method comprises the steps of generating a corresponding ponding area list and a monitoring area list; performing spatial association on the ponding area list, the camera list and the water level gauge sensor list so as to determine the camera and the water level gauge sensor which have a spatial association relationship with the ponding area; for each ponding area, calculating the water depth of the ponding area corresponding to the ponding area according to the water depth data collected by the camera and the water level gauge sensor which have the spatial association relationship with the ponding area, and predicting the predicted ponding depth of the ponding area in the future according to the water depth of the ponding area; dividing camera monitoring grading lists of different grades according to the first camera list, the second camera list and the fourth camera list; and feeding back the gathered flood situation information and the map capturing frequency to a control center, so that the control center carries out rescue scheduling according to the flood situation information, and carries out dynamic scheduling on cameras in the ponding area and the monitoring area.

The invention relates to the technical field of measurement, in particular to a float-type water level gauge dynamic compensation detection method which comprises the following steps: collecting float angle sequence data; synchronously acquiring environment disturbance parameters; calculating the floater angle sequence data to obtain a preliminary water level value; constructing a dynamic compensation model, and outputting an inertia force correction term, a fluid damping correction term and a mechanical hysteresis correction term; the inertia force correction term, the fluid damping correction term and the mechanical hysteresis correction term are multiplied by corresponding weight factors respectively, then algebraic sum is solved, a total compensation amount is obtained, and the weight factors are dynamically adjusted and normalized according to the current wave high energy spectral density, the wind speed gradient change rate and the water temperature viscosity correction coefficient; and deducting the total compensation amount from the initial water level value, and outputting a final compensated water level value. According to the method, the problems of poor multi-physical field sensing capability and poor online parameter identification capability of a compensation method in the prior art are solved.

The invention discloses a reservoir capacity calculation method and system based on hydrodynamic simulation and non-uniform coefficient correction, and belongs to the technical field of water resource management, and the method comprises the steps: carrying out the grid division of a research region; constructing a hydrodynamic model based on topographic data, hydrological data and atmospheric data of a research area, and calculating a real-time water level; introducing a ratio between the actually measured water level and the simulated water level, and calculating a non-uniform coefficient; correcting the hydrodynamic model by using the non-uniform coefficient on the basis of hydrodynamic model calculation to obtain a corrected water level; and calculating the water volume of each grid based on the corrected water level, and accumulating the water volumes of all the grids to obtain the storage capacity. According to the method, the area of the regional grid is extracted through Arcgis software, and dynamic correction of the non-uniform coefficient is introduced, so that the storage capacity calculation precision is effectively improved.

The invention provides a rectangular open channel automatic flow measurement method and system based on multi-flow-layer water flow pressure monitoring, electronic equipment and a storage medium, and the method comprises the steps: measuring the water level information of a to-be-measured drainage basin in real time through an ultrasonic water level gauge; dividing the flow section of the rectangular open channel in the to-be-detected drainage basin into a plurality of flow layers from bottom to top; according to the water level information, the hydrodynamic pressure value of each flow layer in the flow cross section is calculated, and the hydrodynamic pressure value is converted into the water flow velocity value of the corresponding flow layer; calculating the flow of each flow layer based on a flow velocity area method according to the water flow velocity value, and accumulating the flow of each flow layer to obtain the flow of the rectangular open channel; the method has the advantages that manual intervention is not needed, operation is easy, high applicability and real-time performance are achieved, cost is low, high-cost equipment does not need to be used, the measuring effect is accurate, and the method can be suitable for the complex fluid flowing environment; the method is suitable for the rectangular open channel flow measurement field.

The invention discloses an active precipitation monitoring construction method for strong and weak permeable interbedding stratums. The method comprises the following steps that 1, a designed precipitation implementation scheme is input to a precipitation control platform to form a precipitation target; secondly, a plurality of water content measuring holes are formed in the trend of the foundation pit at intervals, an automatic water content measuring system is installed, and water content measuring data of the automatic water content measuring system are wirelessly transmitted to a precipitation control platform; thirdly, a dewatering well is dug in the inner side of the foundation pit, and an active dewatering system is installed; fourthly, observation wells are dug in the outer side of the foundation pit in the trend of the foundation pit according to the set intervals, automatic water level gauges are arranged in the observation wells, and water level data of the observation wells are wirelessly transmitted to the precipitation control platform; and 5, the rainfall control platform monitors and obtains moisture content data and underground water level data in real time, and controls the active rainfall system to actively rainfall into the rainfall target. According to the invention, real-time automatic monitoring and active precipitation control are carried out by monitoring a plurality of parameters, and the precipitation effect and the precipitation accuracy are improved.

The present invention discloses a method for detecting water leakage at the milling joint, which uses a controller, a plurality of wire reels, a water level gauge, a transmitting transducer, a first receiving transducer and a measuring tube. The distance between the joint of adjacent diaphragm wall segments and the two adjacent measuring tubes on both sides is equal. The transmitting transducer and the first receiving transducer move up and down in the measuring tubes on both sides of the joint to be detected through the corresponding wire reels respectively. When the transmitting transducer and the first receiving transducer move up a certain distance each time and the corresponding water level gauges are at the same horizontal height, the transmitting transducer emits ultrasonic signals, and the first receiving transducer receives ultrasonic signals. The first acoustic signal parameter curve along the depth direction of the joint area between the first segment and the second segment is drawn based on the ultrasonic signals received by the first receiving transducer. According to the acoustic signal parameter curve, the position of the water leakage defect section and the degree of the water leakage defect at the joint of adjacent diaphragm wall segments can be quickly and effectively judged.

The utility model discloses a water conservancy surveying water level gauge which comprises a bottom plate, a base is arranged below the bottom plate, a fixing bolt penetrates through the upper portion of the bottom plate, a supporting frame is fixed to the upper portion of the bottom plate, a motor is installed above the supporting frame, a lead screw is installed in the supporting frame, and a sliding block is installed on the outer side of the lead screw. According to the water conservancy surveying water level gauge, through cooperative use of the supporting frame, the motor, the lead screw, the sliding block and the cross rod, the motor drives the lead screw to rotate and drives the sliding block to slide on the outer side of the lead screw, the cross rod can be driven to move up and down, and therefore the height of the radar water level gauge is adjusted, and the distance between the radar water level gauge and the water surface is kept at a proper height; the radar water level gauge is prevented from being submerged when the water level of a river is too high, and when the radar water level gauge is submerged, radar beams may be interfered by impurities, bubbles and other factors in a water body, signal attenuation is caused, and the measurement precision is influenced, and the water level exploration precision can be ensured.