9 results about "Groundwater recharge" patented technology

The application provides a kind of intelligent layered control well system and control method suitable for multiple aquifers, relating to foundation pit dewatering and groundwater recharge technical field, it includes well pipe, pumping and irrigation device, controllable plugging component, pore pressure sensing unit, pressure sensing unit and wellhead control device, controllable plugging component is set in well pipe corresponding to aquiclude of aquifer, including annular waterproof layer and spherical inflatable grouting bag, pore pressure sensing unit detects pore water pressure of target aquifer and non-target aquifer respectively, pressure sensing unit detects the pressure of grouting bag acting on well wall, wellhead control device determines the plugging effectiveness in real time based on the pore pressure change of non-target aquifer during pumping and irrigation process, and automatically triggers grouting supplement when determining that plugging is insufficient, the application realizes flexible switching of multiple working conditions in single well and dynamic maintenance of plugging reliability through active dynamic closed-loop control, effectively reduces the number of wells, reduces construction cost, and reduces disturbance to surrounding groundwater environment.

This invention relates to the field of well cover technology for groundwater recharge wells, and more particularly to an intelligent well sealing device for groundwater recharge wells. The device includes a well cover with a layered structure, comprising an upper cover and a lower cover, forming a sealed equipment housing space. Within this space are a microprocessor, an alarm, a power supply, and a communication module. An anomaly sensor is located at the contact surface between the upper cover and the wellhead mounting base. A water level sensor is located at the lower end face of the lower cover. The microprocessor is electrically connected to the alarm, communication module, water level sensor, and anomaly sensor via wires. All components—the microprocessor, alarm, communication module, water level sensor, and anomaly sensor—are electrically connected to the power supply via wires. This invention combines intelligent detection technology with a traditional well cover structure, enabling real-time, remote monitoring of the status of groundwater recharge wells.

The application discloses a kind of multifunctional compound planting system evapotranspiration process dynamic monitoring device and method, lysimeter measuring cylinder is arranged in the upper portion of lysimeter filter layer, soil evaporation barrel and intercropping crop lysimeter barrel are buried in the soil of lysimeter measuring cylinder top portion, soil moisture sensor is connected to the outer wall of one side of lysimeter measuring cylinder, automatic water supply device is connected to the bottom of the outer wall of the other side, with automatic water supply device is located in the same side, groundwater supply device and water level gauge are equipped in the bottom of lysimeter filter layer, the other side is equipped with drain pipe, drain pipe is connected with leakage device, lysimeter filter layer bottom is connected with weighing sensor, drip irrigation belt is arranged in crop row;Based on lysimeter weight, soil moisture, irrigation data, automatic water supply data, groundwater recharge data, drainage data, leakage data and meteorological data, the change of soil storage water quantity is calculated.The application can accurately characterize the evapotranspiration process of compound system.

This invention relates to a method for CT-NMR combined pore and fracture parameter inversion and storage suitability evaluation for closed coal mines, belonging to the field of carbon dioxide geological storage technology. The method includes: performing CT scanning and NMR testing on the same coal sample to obtain initial pore structure parameters and initial pore size distribution parameters; constructing a CT-NMR combined inversion model, fusing the spatial structure information from CT with the pore size distribution information from NMR, and outputting a pore and fracture parameter set covering multiple scales from micropores to fractures through iterative optimization; based on the pore and fracture parameter set, combined with geological characteristics unique to closed mines such as goaf stability, roadway tightness, and groundwater recharge impact, constructing a storage suitability evaluation index system; and conducting a graded and quantitative assessment of the target closed mine according to the evaluation index system, outputting storage suitability levels and risk management recommendations.

This invention discloses a regional groundwater environmental risk assessment system and method considering the vulnerability of risk receptors, relating to the field of hydrogeology. The system includes the following steps: S100, establishing a cross-timescale monitoring baseline, collecting groundwater recharge intensity sequences and hydrochemical sequences, extracting sedimentary pollution fingerprints through multidimensional correlation, and identifying germination areas with re-release characteristics; S200, under the constraint of the cross-timescale monitoring baseline, calculating the temporal coherence and phase residuals between the recharge disturbance sequence and the sedimentary pollution fingerprint, identifying key spatiotemporal locations triggering pollution release, and constructing a pollution release causal residual spectrum. This invention extracts pollution fingerprints through cross-timescale monitoring, identifies high-risk release areas, reconstructs pollution pathways by combining coherence analysis and phase inversion, sets threshold surfaces and precursor scores, generates pre-suppression parameters, and achieves pollution limiting and closed-loop control through frequency shifting and time inversion, thereby improving groundwater risk response and management capabilities.

The present application relates to coal mine water treatment and groundwater recharge technical field, specifically a kind of mine water recharge and increase infiltration simulation method and test system, the method includes: preparation of rock core sample and simulation mine water, set formation temperature and recharge water temperature to simulate initial temperature difference working condition;Calibration initial permeability;Simulate mine water recharge and plug evolution process, record the permeability after plugging;One or more permeability increasing treatments are performed on the plugged rock core: step-by-step pressurized hydraulic permeability increasing, pulse high pressure physical permeability increasing, chemical acid cleaning and scale removal permeability increasing, test the permeability after permeability increasing;Calculate the permeability recovery rate and permeability increasing rate, and quantitatively evaluate the permeability increasing effect;Data analysis and mechanism summary.The present application also discloses a test system for implementing the method.The present application can reproduce the real working conditions of mine water recharge, plugging attenuation and multi-method permeability increasing in laboratory, and provide reliable test basis for field recharge and permeability increasing engineering design.

This invention proposes an artificial groundwater recharge system, comprising a surface water source, an infiltration channel, a multi-stage filtration and recharge unit, and an anti-clogging unit. The infiltration channel connects the surface water source and the multi-stage filtration and recharge unit, with a length 2.5 to 4.0 times the straight-line distance, and is arranged in a tortuous pattern. A grid structure is installed at the front end of the infiltration channel. The multi-stage filtration and recharge unit includes at least a filter, multiple filter layers, a well, and multiple annular filter media layers, with the top of the annular filter media layers lower than the top plate of the confined aquifer. The anti-clogging unit includes a controller, an electric control valve, and a pumping pipe. The electric control valve and the pumping pipe are respectively connected to the controller. The electric control valve is located between the filter and the filter layers. The pumping pipe is located inside the well, and its outlet is connected to the surface water source. Pressure sensors and flow sensors on the well wall are communicatively connected to the controller. This invention achieves coordinated recharge of deep and shallow groundwater, improves water resource utilization efficiency, and simultaneously enhances filtration efficiency and reduces the risk of clogging.

The utility model belongs to foundation pit engineering construction technology field especially, and relates to a kind of integrated equipment of precipitation recharge, including filter device and precipitation tube well, further including recharge tube well, the inner wall of recharge tube well is fixedly connected with pulse assembly, sealing assembly is equipped at the pipe orifice of recharge tube well, and the pressure storage cavity is formed between recharge tube well and pulse assembly, and sealing assembly is used to seal pressure storage cavity;Pulse assembly includes the mounting ring fixedly connected with the inner wall of recharge tube well, the inner wall of mounting ring is slidably connected with pressure relief cylinder, and the outer wall of pressure relief cylinder is provided with several pressure relief holes that are evenly distributed in circumference, compressed gas is filled into pressure storage cavity by air pump, when gas pressure reaches critical value, pressure overcomes the resistance of pre-punching pressure cylinder and return spring, and pushes pressure relief cylinder to open pressure relief hole, high-pressure gas is released to form pulse instantaneously, and the problem of recharge well blockage and low recharge efficiency is effectively solved by pneumatic pulse and backflow protection, and the effect and stability of groundwater recharge are improved.

The application provides an emergency groundwater source origin analysis method combining isotope dating and water chemistry, comprising the following steps: determining the groundwater recharge, runoff and discharge conditions of a research area according to the regional hydrogeological conditions, setting sampling points in the research area, obtaining the water chemistry ion data, hydrogen and oxygen stable isotope data and radioactive isotope data of the groundwater in the research area, obtaining the basic characteristics of the water chemistry of the regional groundwater, ion spatial distribution, main control ion and source and water-rock reaction path based on the water chemistry ion data, obtaining the groundwater recharge source information and water body age information based on the hydrogen and oxygen stable isotope data and the radioactive isotope data, coupling the information obtained based on the water chemistry ion data, the hydrogen and oxygen stable isotope data and the radioactive isotope data, integrally analyzing the groundwater water chemistry genesis and evolution law of the emergency water source, and generating a tracing conclusion. The application provides a reference basis for the management and water taking of the emergency water source.