63 results about "Ground water quality" patented technology

The invention relates to the technical field of remote monitoring, in particular to a remote monitoring method and system for intelligent water purification equipment. The system comprises a sensing execution unit, a data routing unit, an intelligent central unit and an interactive service unit. The intelligent central unit is used for comparing underground water quality data collected in real time with corresponding month threshold values over the years, water quality fluctuation caused by natural changes such as seasonal replacement can be accurately distinguished, the water quality data interpretation accuracy is improved, when the water quality data deviates from a normal range and influences of natural laws are eliminated, the system introduces real-time weather data, and the water quality data interpretation accuracy is improved. And the analysis module considers the effect of weather on water quality by means of a dynamic structure equation model and resets a threshold value. The intelligent self-adaptive mechanism can effectively distinguish water quality abnormity caused by non-natural laws, for example, normal fluctuation of water quality after rainstorm is recognized, accuracy and intelligence of water quality monitoring are enhanced through multiple times of accurate judgment, and abnormity can be quickly recognized and early warned.

The invention relates to an inshore water quality day-by-day kilometer-level inversion method, system, device and medium, and belongs to the technical field of water quality monitoring, the method comprises the following steps: obtaining remote sensing image data, meteorological reanalysis data and ground water quality site measured data, preprocessing, carrying out space-time matching fusion, using the fusion data as a sample to carry out model training, and obtaining a model training model; obtaining a space model; a spatial model offshore water quality spatial distribution diagram; and constructing a CNN-BiLSTM mixed time sequence model, and training the CNN-BiLSTM mixed time sequence model by taking historical water quality data of a ground water quality station and the offshore water quality spatial distribution map as samples to obtain a prediction model. The method is suitable for red tide early warning, pollution tracing and marine ecological management, breaks through monthly monitoring limitation, and realizes day-by-day kilometer-level water quality dynamic tracking; remote sensing large-range coverage and site high-precision data are fused, and the problem of inshore environment heterogeneity is solved; the time-space double-model cascade architecture significantly improves the generalization ability under complex hydrological conditions.

The invention relates to an underground water quality on-line automatic monitoring station which comprises a monitoring station main body, a multi-parameter sensor, a pump and a solar power supply system, the multi-parameter sensor and the pump are arranged underground, a plurality of layers of partition plates are arranged in the monitoring station main body, a plurality of mounting layers are formed from top to bottom, and a control box is mounted at the top of the uppermost partition plate; a monitoring instrument is installed on the monitoring station body, a voltage stabilizer and a UPS are sequentially arranged at the position of a partition plate below the monitoring instrument and electrically connected with a battery pack to form a standby power supply system, a reagent container is arranged at the position adjacent to the battery pack, a measuring pool is arranged at the bottom in the monitoring station body, and a liquid outlet of the measuring pool is communicated with a waste liquid and waste water collecting device. According to the invention, through reasonable partition arrangement of multiple layers of partition plates, real-time monitoring and data uploading of underground water are realized, dual-power-supply guarantee is provided, operation is stable, waste liquid is collected, treated and detected in a centralized manner, and secondary pollution is effectively avoided.

The invention discloses an underground water quality grading prediction method based on multi-source data fusion and machine learning, and the method comprises the steps: S1, building a sample set: collecting underground water samples of all sampling points in a target region in the same time period, carrying out the analysis to obtain a water quality index, and forming an attribute vector of the underground water sample with a non-water quality index; determining an EWQI value of the groundwater sample, performing water quality grade division according to the EWQI value, and taking the water quality grade as a label of the sample; s2, dividing the sample set into a training set and a verification set; s3, training a prediction model based on machine learning by using the training set, and preventing overfitting in the training process by using the verification set to obtain a trained prediction model; and S4, predicting a to-be-predicted groundwater sample by using the trained prediction model to obtain a predicted water quality grade. According to the method, the water quality index and the non-water quality index are combined, the prediction model is established based on machine learning, and the groundwater quality grade can be rapidly and accurately predicted.

The invention relates to the technical field of geological survey, and discloses a groundwater environment monitoring and early warning method, which comprises the following steps of: coupling a real-time early warning module and a prediction early warning module, and constructing a groundwater environment monitoring and early warning model; according to the national standard, the underground water quality current situation and the real-time and prediction early warning result, an early warning level is delimited, and different colors are given to represent color block warning levels; according to a simulation result, judging an early warning line of the underground water specific pollutants, and if a relatively high early warning level is displayed, carrying out pollutant inversion; possible pollutants speculated by the pollutant inversion module are identified; an early warning decision is made for possible pollutant types and enterprise types; and after the sudden pollution event is effectively disposed, early warning feedback is timely carried out. According to the groundwater environment monitoring and early warning method, the groundwater quality real-time early warning grade and the distribution range of pollutants in the groundwater in different time periods in the future are determined, and a scientific basis is provided for reasonably developing and utilizing groundwater resources.

The present invention provides a method and system for dynamic water quality monitoring based on groundwater level, which relates to the technical field of dynamic water quality monitoring. The method includes: calculating a correction coefficient based on historical data, seasonal variations, rainfall, and geological activities; adjusting the annual average change rate by the correction coefficient to obtain the final groundwater level change trend; setting water quality anomaly monitoring points in areas where the groundwater level has abnormal changes according to the final groundwater level change trend to obtain corresponding abnormal water quality data; regularly collecting water samples from the abnormal water quality data according to the abnormal water quality data, detecting various indicators of the water samples, including chloride content, conductivity, and total dissolved solids, and analyzing the changes in water quality to evaluate the water quality status of groundwater. The present invention improves the robustness to data quality problems, thereby more accurately reflecting the actual situation of groundwater quality.

The invention provides a liquid crystal pollutant underground water detection system based on fluorescence tracing, and relates to the technical field of underground water environment monitoring and pollution prevention and control. According to the system, three types of core structures BAs, CBAs and FBAs of the LCMs serve as targets, a specific fluorescent probe is designed, a water sample is accurately obtained through an underground water in-situ sampling module, and after fluorescence signal amplification and anti-interference processing are conducted, LCMs type recognition and concentration quantification are achieved in combination with a machine learning algorithm. The core innovation lies in the structural adaptive design of the targeted fluorescent probe, the underground water quality anti-interference technology, engineering in-situ detection integration and multi-component synchronous analysis. Practice verification shows that the detection limit of the system to BAs, CBAs and FBAs LCMs is as low as 0.01-0.05 ng / L, the response time is less than or equal to 30 min, the turbidity resistance and ion interference resistance are high, the system is adaptive to engineering scenes such as in-well monitoring and leachate tracing, rapid screening and dynamic tracking of underground water LCMs pollution can be realized, and engineering technical support is provided for underground water pollution prevention, control and restoration.

The invention discloses a wetland groundwater quality environment monitoring method and system, and relates to an image processing and data processing technology, and the method comprises the steps: integrating an imaging probe to an induction buoy, and carrying out the vertical arrangement of the induction buoy in a groundwater monitoring well; acquiring effective water level data of each underground water monitoring well based on the sensing buoy chain at any monitoring moment; image acquisition is carried out by utilizing the triggered imaging probes in the induction buoy chain; according to the image data acquired at each water level, extracting morphological characteristics of the particulate matters retained in the image data at different water levels; identifying particulate matter types under different water levels according to the extracted morphological features; and based on the obtained effective water level data, establishing a corresponding longitudinal coordinate so as to establish a current water level-water quality correlation map according to the identified particulate matters. According to the invention, the water quality of the wetland underground water can be detected in a more intuitive manner, so that the monitoring efficiency of the underground water is improved.

The invention relates to the technical field of underground water quality analysis, in particular to a quantitative sampling device for underground water quality analys.The quantitative sampling device comprises a water diversion mechanism, a standing detection mechanism is arranged on the side face of the water diversion mechanism, and the standing detection mechanism communicates with the interior of the water diversion mechanism; a separable pre-embedded water diversion mechanism is arranged at the bottom of the water diversion mechanism, the pre-embedded water diversion mechanism communicates with the interior of the water diversion mechanism, and quantitative extraction equipment is arranged on the front face of the water diversion mechanism. During use, the drainage pipe and the sampling pipe are arranged on the two symmetrical faces of the flow dividing bin respectively and used for being connected with an external pump and a standing detection mechanism, underground water can be guided into the flow dividing bin to make contact with a probe of the standing detection mechanism, and real-time detection analysis is achieved; the quantitative water taking pump quantitatively pumps deep underground water through the spring pipe for detection and analysis, and the effect that standing detection and quantitative sampling detection can be carried out at the same time is achieved.

The present invention discloses a multifunctional device for groundwater quality detection and water level measurement and a method for use thereof. One end of a probe rod is connected to the top of the connecting chamber. The probe rod is hollow and has the hollow conduit disposed therein. The upper end of the hollow conduit is connected to the air extraction device, and the lower end of the hollow conduit passes through the connecting chamber to the top of the water quality detection chamber. The bottom of the connecting chamber is openably connected to the top of the water quality detection chamber. An integrated detachable test tube bundle is disposed inside the water quality detection chamber. The lower portion of the water quality detection chamber is connected to the water intake chamber, and an integrated detachable water intake tube bundle is disposed inside the water intake chamber. A groundwater level measuring device is installed at the lower end of the water intake chamber, and an alarm device is disposed inside the water level measuring device. Advantages: The device of the present invention can simply and conveniently detect groundwater quality, measure groundwater level, and obtain groundwater samples outdoors in situ. It is simple to operate, low in cost, and widely applicable.

The invention relates to the technical field of underground water sampling, in particular to an underground water quality monitoring and sampling device which comprises a sampling box, a buoyancy component is fixedly mounted on the lower side of the sampling box, a sampling shell is fixedly mounted on the lower side of the buoyancy component, and a sampling component is rotatably mounted on the upper side of the sampling shell. An anti-turbulent flow assembly is fixedly mounted on the lower side of the sampling shell; the worm drives the worm gear to rotate, the worm gear drives the driving rod to rotate, the driving rod drives the driving gear to rotate, the driving gear drives one of the connecting gears to rotate, and therefore the multiple sets of connecting gears are driven to perform linkage movement; the six anti-spoiler plates are driven to move and are parallel to one another, large-particle sediments which do not participate in detection at the bottom of the sampling well are separated, then sampling water is sucked into the sampling well through the one-way suction nozzle, and the situation that the sampling water is mixed and polluted due to turbulent flow generated in the suction process is prevented.

The invention is applicable to the technical field of pollution remediation, and particularly relates to a remediation method for polluted underground water in a storage yard based on coupling and blocking of a permeable reactive barrier, and the method comprises the following steps: acquiring site hydrogeological conditions and distribution conditions of pollution plumes, and constructing a stretching arm type water stop guide wall; constructing a lifting type PRB system, wherein the lifting type PRB system is constructed in a closure area of two downstream arms of the arm-expanding type water stop guide wall; the PRB filler is determined according to the water quality, the flow and the flow velocity of the underground water, the lifting type PRB system is filled with the PRB filler, and the polluted underground water is repaired through the PRB filler. Polluted underground water at the bottom of the tailing pond and around the tailing pond is blocked, guided and converged by the aid of the arm-expanding type water-stopping and flow-guiding wall, the polluted underground water is guided into the lifting type PRB system, and the polluted underground water naturally flows through the PRB system under the converging action of the water-stopping and flow-guiding system. Therefore, the underground water flowing to the downstream through the PRB system reaches the underground water environment quality standard requirement or meets the ecological function requirement of regional underground water.

The present invention discloses an experimental method for evaluating the long-term impact of chemical grouting of porous and fractured rock formations on groundwater quality, comprising the following steps: construction of a model system, pretreatment of test materials and filling of a grouting model, slurry selection and closed grouting, grouting body infiltration, and water quality analysis and hydrochemical analysis and evaluation of the filtered water. The method of the present invention has the characteristics of replaceable grouting materials and adjustable infiltration flow rate; it can realize long-term real-time dynamic monitoring and recording of infiltration flow rate through digital flow and velocity meters, and measure the permeability coefficient of the grouting body; by analyzing the water quality information of the grouting body leachate, it is possible to explore the pollution effect of grouting on the groundwater environment and the interaction between the slurry and the geological body; the method also provides a subsequent hydrochemical analysis template of the grouting body leachate, thereby constituting an indoor systematic evaluation of grouting pollution.

The invention discloses an underground water multi-pollutant rapid prediction and diagnosis system, which comprises a multi-parameter sensing and data acquisition module used for acquiring underground water quality parameters in real time; the edge pretreatment unit is used for carrying out edge pretreatment on the underground water quality parameters; the off-line synthetic data engine is used for generating synthetic training data of transient extreme working conditions; the feature engineering processing unit is used for constructing interaction features based on a geochemical mechanism; the AutoML reasoning unit is used for deducing and outputting a pollutant concentration predicted value through a model; and the physical-data dual-drive fault diagnosis module is used for diagnosing the authenticity of pollution according to three-dimensional calculation results of the physical residual calculated by the physical residual calculation unit, the mean square error of the sensor data calculated by the data reconstruction error unit and the difference between the observed value and the predicted value calculated by the statistical test unit. And judging whether to give an alarm according to the diagnosis result. According to the scheme, the specific pollutants can be accurately identified, and the authenticity of pollution can be accurately identified.

The invention discloses a water quality evolution intelligent analysis system suitable for groundwater investigation, and particularly relates to the technical field of groundwater environment evolution analysis, organizing and calling behavior monitoring of a multi-strategy prediction model is realized based on a model pool construction module, and whether the model is in a gaming polarization state is judged by combining a polarization identification module; the dynamic weight adjusting module is used for adjusting the model participation weight, the entropy constraint module is introduced for inhibiting the weight representation imbalance, the error correction module is used for dynamically feeding back and correcting the prediction error, and the path memory module is used for realizing the storage and reuse of the regulation and control strategy in the polarization state; according to the method, dynamic identification and weight adjustment control of model behavior polarization are realized by constructing a multi-strategy model pool and a polarization identification mechanism, the evolution stability of the system is guaranteed by combining entropy constraint and an error correction mechanism, and the response intelligence and the strategy reuse capability are improved by introducing a path memory module. Therefore, the accuracy, the stability and the self-adaptive capability of the groundwater quality evolution analysis are enhanced.

The utility model discloses an underground water quality detecting and sampling device which comprises a sampling component connected with a pay-off component and used for sampling underground water; the sampling assembly comprises a first electric push rod, a connecting block, a sampling rod, a sampling hole, a baffle ring and a connecting plate; a shell of the first electric push rod is fixedly connected with the sampling rod, a plurality of sampling holes which are uniformly distributed are formed in the sampling rod, and the sampling rod penetrates through a plurality of baffle rings. The utility model relates to the technical field of underground water sampling, in particular to an underground water quality detecting and sampling device which realizes automatic sampling through the cooperation of a pay-off assembly and a sampling assembly. The transverse adjusting assembly and the vertical adjusting assembly can accurately control the sampling position, so that the representativeness of the sample is ensured; automatic sampling reduces the risk that personnel directly contact a polluted water source, and the operation safety is improved.

The invention relates to the technical field of water quality monitoring and sampling, and particularly discloses an underground water quality monitoring and sampling device which comprises a sampling box body, the bottom of the sampling box body is fixedly connected with universal wheels with brakes, and the universal wheels with the brakes are uniformly distributed at the bottom of the sampling box body; a freezing fan is fixedly connected to the center position of the bottom of the sampling box body, the freezing fan is communicated with a first placement barrel through a pipeline, the bottom of the first placement barrel is fixedly connected with the bottom of the inner wall of the sampling box body, and a second placement barrel is fixedly connected to the part, located on one side of the first placement barrel, of the inner wall of the sampling box body; a sampling device is fixedly connected to the part, away from one side of the second placement cylinder, of the bottom of the inner wall of the sampling box body, a first electric guide rail is fixedly connected to the top of the inner wall of the sampling box body, the underground water quality monitoring and sampling device is fixed by pushing the sampling box body with brake universal wheels to a sampling point, and the problem that traditional equipment is inconvenient to move is solved.

The invention relates to the technical field of underground monitoring well maintenance, and discloses an underground monitoring well unblocking and desilting process which comprises the following steps: S1, clogging judgment: monitoring the water level and the water quality of an underground monitoring well, and on the premise that the current underground monitoring well simultaneously meets the periodical fluctuation abnormity of the underground water level and the abnormal water quality of the underground water, determining the clogging of the underground monitoring well; verifying whether the current underground monitoring well is clogged or not through a video, and if so, carrying out the next step; s2, desilting operation is conducted, specifically, scrubbing and piston flushing are conducted on the inner pipe wall of the current underground monitoring well in sequence, and then water body replacement and washing are conducted; and S3, desilting effect evaluation: the current desilting effect of the underground monitoring well is evaluated, if the current desilting effect is judged to be unblocked, the process is ended, and if the current desilting effect is judged to be clogged, the process jumps to the step S2. In addition, the invention further discloses an underground monitoring well unblocking and desilting device which is applied to the step S2. According to the method, a complete underground water desilting and unblocking process is formed through underground monitoring well clogging judgment, desilting operation and desilting effect evaluation.

The present invention discloses a device and method for monitoring surface and groundwater in the oasis-desert transition zone. The device is provided with a monitoring pole and a monitoring well, and a pressure-type water level meter and an environmental tracer are installed in the monitoring well. A plurality of multi-function cartridges are provided for releasing the gas and collecting groundwater samples. The monitoring methods include S1, monitoring point placement, S2, dynamic monitoring, and S3, dynamic monitoring correction. The invention can realize the monitoring of surface water level, groundwater level, evaporation rate, etc., and further, environmental trend. By releasing tracers, the flow direction and velocity of groundwater can be monitored, and at the same time, the groundwater is sampled. By further monitoring groundwater quality, the surface water and groundwater quality in the oasis-desert transition zone will be improved. Realizing simultaneous, high-speed automatic monitoring of sewage water, and real-time monitoring of the changing trends of water resources in the oasis-desert transition zone. It is extremely predictable.

The present invention discloses an intelligent groundwater water quality supervision method and system. The method includes heterogeneous sensing acquisition, water quality benchmark modeling, sewage source tracing enhancement, water quality prediction and early warning, and groundwater water quality supervision. The present invention relates to the technical field of water quality supervision, specifically an intelligent groundwater water quality supervision method and system. The present invention adopts a comprehensive groundwater water quality supervision method combining water quality benchmark modeling, enhanced pollution source tracing, and dynamic threshold water quality prediction and early warning, effectively improving the perception ability, identification ability, and response ability of groundwater pollution incidents, and realizing the supervision transformation from "passive response" to "active prediction"; an improved spatio-temporal graph convolutional network method combined with a spatio-temporal dynamic baseline algorithm is used for water quality benchmark modeling; an improved adversarial generation network method for virtual and real source tracing modeling is used for pollution source tracing enhancement.

The present invention relates to the field of new generation information technology, and discloses a method, system, equipment and medium for controlling groundwater quality monitoring equipment. The method comprises: connecting a sampling device to obtain sampling device information; obtaining a groundwater sampling task and determining sampling task monitoring parameters; performing task interval time span analysis and establishing an identification control relationship; performing matching analysis based on the operating status and sampling data and the sampling task monitoring parameters, performing control identification, and locating the equipment layout to perform equipment control operations. The present invention solves the technical problems in the prior art of high failure rate, high energy consumption and inability to centrally manage groundwater quality monitoring equipment during continuous operation, and achieves the technical effects of realizing equipment standby, sleep wake-up, remote control and multi-device network management, improving equipment operation stability, reducing energy consumption and improving management efficiency.

The invention provides a groundwater pollution risk assessment method based on a groundwater environment background value, and aims to solve the problems that the influence of a natural process and human activities on a groundwater environment is difficult to discriminate in the prior art, the background value is inaccurate to determine, the risk management mode is extensive and the like. The method comprises the following steps: dividing a human activity influence area and a natural dominant area by constructing a human activity quantification model and a judgment model, and determining an underground water environment background value; introducing an underground water dynamic field activeness index, and establishing a water quality dynamic threshold model associated with the activeness; dividing main control factor subareas of different groundwater qualities according to the activeness-water quality discrimination relation and the pollution source analysis result; and the zoning result is verified by adopting methods such as isotopic tracing or specific pollutant analysis, a risk management and control strategy matched with the characteristics of each zone is provided, scientific improvement of underground water background value determination is realized, and a refined technical support is provided for underground water environment protection and restoration work.

This invention relates to the field of pollution monitoring technology, specifically to a multivariate dynamic monitoring platform for groundwater in mining areas. This platform includes a data acquisition module for acquiring sample environmental hydrological disturbance data sequences and sample hydrological and water quality data sequences; an evaluation value acquisition module for acquiring complex and sensitive evaluation values ​​of environmental hydrological disturbance responses corresponding to each hydrological and water quality type; and a gain compensation and decision tree model construction module for compensating the traditional information gain of the corresponding hydrological and water quality type based on the complex and sensitive evaluation values ​​of environmental hydrological disturbance responses, obtaining a target information gain, and using the target information gain as a node splitting criterion to conduct supervised learning training on the sample hydrological and water quality data combination to generate a binary classification decision tree model for groundwater pollution identification and monitoring in mining areas. Furthermore, this invention can improve the accuracy of the decision tree model for pollution identification and monitoring.

The invention discloses a water quality-water quantity-ecology coupled groundwater environment risk early warning method, and belongs to the technical field of groundwater resource management and ecological environment protection. According to the method, an underground water environmental risk early warning PQLRT model is constructed based on five types of underground water environmental risk early warning indexes, namely an underground water pollution risk P, an underground water quality change trend Q, an underground water level change trend L, an ecological risk R and an ecological evolution trend T; giving grade values 1-3 to the five types of early warning indexes respectively; carrying out weighted summation on the five index equal weights to form an underground water environment risk score; and according to the underground water environment risk score, an equal-distance grading method is adopted to divide into five early warning levels: no alarm, light alarm, medium alarm, heavy alarm and huge alarm. According to the invention, based on multi-source data fusion and factor weight construction, multi-dimensional risk identification, graded early warning and driving element determination of underground water environment risks are realized, and technical support is provided for sustainable utilization and ecological safety management of underground water resources.

The utility model discloses a movable polluted groundwater well washing device, which relates to the technical field of environment monitoring and comprises a box body, a box cover is hinged on the upper surface of the box body through a hinge, a storage battery, a variable-frequency governor and a flow meter are arranged on the inner wall of the box body, and the variable-frequency governor and the flow meter are electrically connected with the storage battery through leads. A well washing device body and two supporting frames are arranged outside the box body, and a winding roller is installed between the two supporting frames. According to the underground water quality pollution detection device, underground water needing to be detected can be pumped through the well washing device, new water is returned, the obtained water quality has representativeness, the accuracy of the underground water quality pollution detection result is guaranteed, the movable power source is used for supplying power to the well washing device, meanwhile, the pumping speed of the well washing device can be controlled, and the water quality pollution detection accuracy is improved. The amount of the pumped underground water can be monitored, and the polluted underground water well washing device is integrally designed, so that the convenience and practicability during subsequent use and movement can be improved.

The invention belongs to the technical field of intelligent monitoring, and particularly relates to a wellhead integrated underground water automatic monitoring terminal. Comprising a sampling cavity arranged in a wellhead casing, and underground water enters the sampling cavity through a water inlet hole in the wellhead casing; the three-electrode probe assembly is mounted in the sampling cavity and comprises a working electrode, a reference electrode and an auxiliary electrode; the electrochemical workstation module is used for applying a sine disturbance voltage signal superposed on the steady-state open-circuit potential to the three-electrode probe assembly; the model identification module is used for generating a Nyquist diagram scatter sequence according to the original electrochemical impedance spectroscopy data sequence to form an equivalent circuit model identification result; the water quality calculation module is used for calculating underground water quality indexes according to the identification result of the equivalent circuit model; and the communication module is used for uploading the underground water quality index to a remote underground water monitoring platform. The method has the advantages of being compact in structure, high in intelligent degree, high in calculation efficiency and high in adaptability.

A ground water and waste water quality improvement system using three-phase alternate current comprising of a water flow meter, an electric water purifier, a multi-substance filtration set, a water tank and a water pump, discharging electric current through electrodes for activating redox reactions, resulting in suspended sediments in the water that are filtered by the multi-substance filtration set. As regards the ground water quality improvement, a filter press is added for confining the sediments from backwash. As for the waste water quality improvement, a hydrocyclone separator is added for separating heavy sediments before entering the multi-substance filtration set. Afterwards, the filtered water is stored in the water tank before being delivered to the water pump in order to pump and dispense the water for use. This water quality improvement system helps remove odours, colours and minerals that are dissolved in and contaminate water, and kills germs with no need for chemicals, minimising environmental impacts and helping in mounting space saving and construction budget saving when compared with traditional water treatment systems.

The utility model relates to an underground water quality surveying and sampling device which comprises a sampling pipe, a conical pipe bottom fixedly connected to the bottom of the sampling pipe, a water inlet pipe fixedly connected to the bottom of the conical pipe bottom, a hollow screw-in valve element in threaded connection with the bottom end of the water inlet pipe, a valve ball arranged at the top of the screw-in valve element, and an elastic assembly abutting against the valve ball and arranged in the conical pipe bottom. The screw-in valve element is screwed in to push the valve ball to compress the elastic assembly to adjust the water inlet pressure. According to the underground water quality surveying and sampling device, the screwing-in valve element capable of screwing in and adjusting the elastic assembly is used for adjusting the water pressure resistance of the valve ball, so that a water sample can eject the valve ball open to enter the sampling pipe only when the target depth is reached in water, deep water sample collection is achieved, and the water quality surveying accuracy is improved.

The invention discloses a groundwater remediation system based on an oxidation reaction zone. The groundwater remediation system comprises a general control integration subsystem, a groundwater circulation well subsystem, a chemical injection subsystem and a monitoring subsystem. The groundwater circulating well subsystem comprises a plurality of groundwater circulating wells distributed at the downstream of the polluted area, each groundwater circulating well forms a vertically flowing hydraulic influence area in a respective vertical area, and the hydraulic influence areas corresponding to the plurality of groundwater circulating wells are connected in series to form a hydraulic oxidation reaction zone; the monitoring subsystem monitors underground water quality condition data of the upstream and the downstream of the underground water circulation wells and transmits the monitoring data to the general control integration subsystem, and the general control integration subsystem controls the chemical injection subsystem according to the monitoring data and adjusts chemical injection parameters of each underground water circulation well. The type and concentration of underground water pollutants are monitored in real time, the injection amount and the medicament type are precisely adjusted in a targeted mode, further outward diffusion of the pollutants is greatly prevented, and effective control over the pollution plume is achieved.