26 results about "Water table" patented technology

A flash flood simulation method includes: obtaining a water storage in a vegetation root zone and obtaining an actual evaporation at any point in the vegetation root zone within a target watershed; obtaining a total infiltration rate in an unsaturated zone based on an infiltration model; obtaining a saturation overland flow and an interflow based on a vertical distance from a wetting front to a slope surface; updating an average saturated groundwater table depth based on the interflow and the total infiltration rate of the unsaturated zone; constructing a flash flood model for the target watershed based on the water storage of the vegetation root zone, the actual evaporation, the total infiltration rate of the unsaturated zone, the saturation overland flow, the interflow, and the average saturated groundwater table depth; and simulating an event-based flood hydrograph of the target watershed based on the flash flood model for the target watershed.

The invention discloses an underwater robot dynamic cooperative control method and system fusing multi-source data, and relates to the field of general control or adjustment systems. The method comprises the following steps: controlling an inspection unmanned aerial vehicle to obtain laser point cloud and multispectral data of a reservoir dam and a water meter, and constructing a centimeter-level global space reference; adopting an anomaly detection algorithm based on mahalanobis distance to identify an abnormal water surface area, and generating a collaborative exploration task package; after the underwater robot receives the task package, centimeter-level accurate positioning is achieved through a permanent magnet mark array and visual positioning, and veneering observation is conducted on the underwater dam face; the water quality sampling unmanned aerial vehicle automatically collects stratified water body samples based on vertical water quality profile data; and collecting multivariate heterogeneous data, constructing a causal network model through principal component analysis, Bayesian reasoning and Granger causal test, and generating a comprehensive diagnosis report. The method greatly improves the positioning precision and diagnosis efficiency, and reduces the operation and maintenance cost.

The invention discloses a test method for shear creep characteristics of a rock mass structural surface in a near-dam area and a medium. The test method comprises the following steps: collecting corresponding geological exploration data and annual change data of an underground water level after water storage of a dam; designing a test load based on the collected data; designing an artificial sawtooth structural surface based on a rock surface topography instrument; carrying out a rock mass structural surface shear-seepage coupling test, and determining the shear strength of the structural surface under the action of the maximum seepage pressure and the corresponding maximum shear load; carrying out a rock mass structural plane shear creep-seepage coupling test under the dam water storage condition, controlling the shear load to be constant in the test, gradually applying seepage pressure, and recording the creep deformation of the structural plane; a rock mass structural plane shear creep-circulating seepage coupling test is carried out under the dam water storage condition, in the test, the shear load is controlled to be constant, the reciprocating seepage pressure is gradually applied, the structural plane creep deformation is recorded, and the influence of the circulating action of the seepage pressure on the rock mass structural plane shear creep characteristic after dam water storage is simulated.

The invention discloses a method for determining the position of a dam-surrounding seepage-proofing line, which comprises the following steps of: 1) drilling, and carrying out a seepage test and underground water level long-term observation in a drill hole; 2) drawing a contour line relative to the top surface of the impervious layer based on the result of the penetration test; based on the long-term observation data of the underground water level, an underground water level equal water level line is drawn; (3) based on the groundwater surface equal water level and the opposite impervious layer top surface contour line, a dam-surrounding seepage-proofing line is preliminarily planned; and (4) determining a dam-surrounding seepage prevention line. According to the method, the drilling coordinates are combined with detailed and comprehensive hydrogeological conditions such as underground water and rock-soil body permeability, and the optimal dam-surrounding seepage prevention line position is determined by comparing two schemes of the initially-planned underground water surface and the relatively-impervious layer top surface, so that the seepage prevention line position is determined on the premise that the dam-surrounding seepage safety is guaranteed. And the anti-seepage route is shortened, the engineering amount of the anti-seepage curtain is reduced, and the construction treatment cost is saved.

According to the method and device for in-situ survey of the water pressure borne by the underground structure, the value of the water pressure borne by the outer surface of a structure in an underground water-soil mixture on the unit area is measured according to the Newton's third law, namely the principle that acting force is equal to counter-acting force. Providing a measuring device at least comprising a survey hole, a load system and an underground water level control system; the acting force along the gravity direction is reduced in a step-by-step unloading mode, so that the measuring bottom plate tends to a static unbalance state and enters different self-stabilization balance states; along with the gradual increase of unloading, the counterforce of the soil spring in the reverse gravity direction is gradually reduced; recording the motion state of the measuring bottom plate under each stage of load, and obtaining a previous self-stabilization equilibrium state closest to the state by recording the violent floating motion state of the measuring bottom plate; the tiny soil reaction force in the self-stabilization equilibrium state is ignored, and according to a mechanical equilibrium equation, the total lower pressure value on the measurement bottom plate in the state is approximately taken as the underground water pressure value borne by the measurement bottom plate.

The application discloses a kind of underwater robot dynamic cooperative control method and system of fusion multi-source data, it is related to general control or regulating system field.In the method, control inspection unmanned plane obtains the laser point cloud and multispectral data of reservoir dam and water table, constructs centimeter level global space datum;Abnormal detection algorithm based on Mahalanobis distance is used to identify abnormal water surface area, and generate cooperative exploration task package;After receiving task package, underwater robot realizes centimeter level accurate positioning by permanent magnet marker array and visual positioning, and carries out surface observation on underwater dam face;Water quality sampling unmanned plane automatically collects stratified water sample based on vertical water quality profile data;Collect multi-element heterogeneous data, construct causal network model by principal component analysis, bayesian inference and granger causality test, and generate comprehensive diagnosis report.The application greatly improves positioning accuracy and diagnosis efficiency, and reduces operation and maintenance cost.

The completions process eliminates the Oil & Gas Industry's need for fracking and improves the production process. This process uses energy and electricity, instead of chemicals and hydraulic fracturing to create pathways (fractures) which enable the formation to deliver petroleum fluids to the surface. This process reduces our carbon footprint and eliminates the chemical dangers to the water table and threat of earthquakes.

The present application relates to the technical field of coal mining and discloses a method for magnetically controlling phreatic water level during coal mining. The method comprises: acquiring pre-mining information data; on the basis of a vegetation type and a soil sample from a phreatic layer, determining a vegetation growth range, the vegetation growth range comprising a water table depth range and a soil moisture content range; on the basis of the vegetation growth range and the pre-mining information data, determining the on or off state of a magnetizing device during mining; if the pre-mining water level of the phreatic aquifer is above the upper limit of a water table depth range, controlling the magnetizing device to be turned off and regulating corresponding information data; and if the post-mining water level of the phreatic aquifer is above the regulated water level of the phreatic aquifer, controlling the magnetizing device to be turned on, and regulating the magnetization intensity, so that post-mining information data is within the vegetation growth range. The present application effectively reduces the evaporation of groundwater and the occurrence of regional salinization, and can effectively protect the ecological environment and implement coal mining.

Conventional foundation systems require huge amounts of materials like concrete and steel, excavation of larger areas, heavy machinery, skilled labour as well as longer period of time for preparatory works such as excavation, formwork, reinforcement and curing. They also cause environmental disturbance as the extensive excavation disrupts the natural soil terrain, disturbs water tables and impacts drainage patterns. The proposed invention relates to a pre-engineered nail (PEN) foundation (100) and process of construction thereof. The foundation is a portable, easy to implement, low-cost, low- maintenance, modular, sustainable, environment friendly and quick solution to be used for construction of pre-engineered structures. Proposed PEN foundation (100) comprising pre-engineered node head (10) and anchoring nails (30), can be installed in shallow depths quickly. This technology eliminates the need of large excavations, heavy machinery and longer time periods for installation, functioning and maintenance.

The invention relates to the technical field of settlement monitoring, and discloses a building accurate settlement monitoring and early warning system, which is characterized in that a measuring point module is provided with a near-side representative pile, a far-side representative pile, a pressure measuring pipe and a displacement acquisition device to respectively acquire axial force, underground water level and base displacement data; a parameter calculation module calculates a bearing share asymmetry index, an underground water level equivalent drawdown and an effective stress substitution amount, and eliminates a time trend term to obtain a base displacement residual error; the period and path analysis module divides closed periods according to the periodical characteristics of the equivalent depth reduction of the underground water level, forms parameter paths in all the periods, calculates directed areas and determines net drift amount; the mapping and prediction module establishes a linear relation between a directed area and a net drift amount based on the multi-cycle data to obtain an area drift mapping amount; the judgment module checks whether the area drift mapping amount is zero or not under a predetermined significance level, if yes, output is abnormal, and if not, output is normal.

This application provides a method, system, device, and storage medium for realizing a depth-domain imaging surface. The method includes applying a total correction to preprocessed time-domain data to correct a fixed surface, obtaining a final reference surface; secondly, using the travel time information of the first arrival wave of an earthquake to invert the near-surface velocity structure, extracting the velocity and thickness of the weathering layer from the tomographic static correction, and calculating the time correction. This invention, through time-domain tomographic static correction, corrects the weathering layer data to the water table, effectively avoiding the difficulty of near-surface velocity modeling. It quickly and effectively achieves depth-domain modeling and imaging. By utilizing the concept of time-domain static correction, seismic data is corrected to the water table, thus avoiding near-surface velocity modeling and directly starting mid-to-deep modeling from the water table. This shortens the processing cycle and improves velocity accuracy, which is beneficial for seismic imaging.

A decontamination method for subsurface aquifers having per- and polyfluoroalkyl substances (PFAS) contaminants by injecting gas through a screened well or open tube through a porous media to form buoyant material where the PFAS contaminants accumulate on and / or in the buoyant material and rise to the water table or top of the aquifer with PFAS that desorbs from the buoyant material and concentrates in the shallow groundwater, and extracting or sequestering the groundwater near the water table or top of the confined aquifer and / or collecting the buoyant material for treatment. The method may include treatment of aquifer material consisting of gravel, sand, silt, clay, or fractured geologic media, or combination, and extraction through phytoremediation, groundwater extraction wells, wellpoint systems, or groundwater extraction trenches and include a seal and / or check valve near the water table in the trench to selectively permit water and buoyant material to flow upward.

The application discloses a kind of water area ecology monitoring method, device, equipment and storage medium.Firstly, the ecological hydrological data of target water area is collected by real-time remote sensing technology, including water table color, suspended solids concentration and surrounding vegetation coverage image, radiation calibration processing is carried out on vegetation coverage image to obtain radiation brightness value and apparent reflectivity, and regional growth algorithm is used to identify vegetation area image.Combined with apparent reflectivity, atmospheric correction is carried out to obtain water surface temperature.At the same time, the predicted water level height is obtained by inputting suspended solids concentration into water level prediction model.If real-time data (such as predicted water level height, real-time water table color, real-time suspended solids concentration, vegetation color or vegetation density) is inconsistent with target data, ecological early warning is triggered.The application automatically collects and processes real-time remote sensing data of target water area, efficiently extracts key ecological indicators using algorithms and integrates multi-dimensional data, improves monitoring efficiency and accuracy, and optimizes ecological early warning effect.

The application provides a groundwater-sealed cavern real three-dimensional fissure network seepage simulation method and electronic equipment, the application is based on the fissure exposed by the excavation of the groundwater-sealed cavern to model, the fissure parameters are basically consistent with the actual situation, the difference of the fissure characteristics and the fissure distribution characteristics in the excavation area is reflected, the seepage characteristics of the groundwater-sealed cavern groundwater in the water-bearing medium are truly reflected, and the fissure connectivity and the seepage distribution difference of different regions of the water-bearing medium can be more accurately characterized. The fissure network seepage model of the groundwater-sealed cavern in different stages is constructed, the change of the groundwater in the construction process of the groundwater-sealed cavern can be analyzed, the seepage quantity prediction analysis can be carried out, and the prediction analysis of the cavern seepage quantity and the groundwater level in the operation process of the groundwater-sealed cavern can be carried out.

The invention discloses an intelligent slope slippage monitoring method and system based on multi-source heterogeneous data space-time fusion, and the method comprises the following steps: arranging sensors on a slope, and collecting the data of surface displacement, deep deformation, rainfall / intensity and pore water pressure / underground water level; and unifying timestamps, eliminating abnormal values, complementing missing data, and constructing a unified time sequence framework. Based on historical data or engineering experience, a time lag window is set, and the time lag relation between rainfall and deformation data is analyzed. And combining the multi-source data in a staggered manner according to a preset time window to form a two-dimensional matrix containing rainfall, pore water pressure and deep displacement rate. And inputting the feature matrix to a landslide risk assessment model, and outputting a continuous landslide probability score. And setting a grading threshold according to the score, and outputting red, orange or green early warning information. According to the invention, through constructing the space-time dislocation characteristic matrix and outputting the continuous landslide probability score, refined evaluation and graded early warning of the slope stability state are realized.

The invention discloses an underground water stratified sampling device, and belongs to the field of underground water sampling. The device comprises a mounting cylinder, a circular plate is hinged to the mounting cylinder, an outer cylinder is inserted into the middle of the circular plate, an inner cylinder is inserted into the outer cylinder, the outer wall of the inner cylinder is attached to the inner wall of the outer cylinder, a plurality of first through holes are vertically formed in the outer cylinder in an array mode, a second through hole is formed in the side wall of the inner cylinder, and the inner cylinder can rotate and axially slide in the outer cylinder. The second through hole can be communicated with one of the first through holes or is not communicated with any one of the first through holes; the mounting cylinder is coaxially placed in the sampling well, the circular plate can swing on the mounting cylinder, so that the outer cylinder can be attached to the inner wall, located in an aeration zone, of the sampling well, and when the outer cylinder rotates to enable the first through hole to face the well wall, a water sample in the aeration zone can enter the inner cylinder; the device can be used for sampling underground water in vadose zones with different depths, and also can be used for sampling underground water under a diving surface with different depths.

The present application relates generally to methods and systems for delivering amendments like sulfate to a subsurface below a ground surface. In one embodiment a process comprises advancing a borehole from the ground surface to the subsurface below the ground surface wherein the borehole is advanced above a water table. The borehole is at least partially filled with a mixture comprising gypsum and a granular media. The borehole is then irrigated with water to at least partially dissolve the gypsum and to spread the dissolved gypsum to a desired treatment zone below the ground surface. The irrigating may comprise employing a gravity fed trickle flow using an irrigation line while the desired treatment zone may comprise one or more hydrocarbons.

The invention discloses a rock slope structure stability evaluation method, belongs to the technical field of slope stability evaluation, and aims to solve the problem that in the prior art, when the stability of a rock slope structure is evaluated, consideration of groundwater factors is insufficient. The dynamic change of the underground water level is accurately simulated through underground water numerical simulation software, boundary conditions are set in combination with meteorological data, and the fluctuation range and rate of the water level are accurately predicted, so that the influence of pore water pressure change on the effective stress and shear strength of rock can be accurately calculated, and the dissolution rate is quantified by coupling a solute transport model. The damage degree of a rock structure is evaluated in combination with a water level fluctuation period, a corrosion damage distribution diagram is drawn, an analytic hierarchy model is constructed to determine the weight of each factor including groundwater, a comprehensive index is calculated by adopting nonlinear weighted summation and is graded, the interaction between the groundwater and other factors is fully considered, safe operation of slope engineering is effectively guaranteed, and the safety of slope engineering is improved. And the stability evaluation and protection level of the whole rock slope project is improved.

This invention specifically relates to an analytical calculation method for the flow field in foundation pits within unconfined aquifers, encompassing the fields of hydrogeology and engineering geology. The method involves incorporating dimensionless hydrogeological data, the length and location of the suspended cutoff wall, and the pumping volume construction plan into an analytical solution to calculate the changes in the seepage field within the foundation pit. This invention simultaneously considers the effects of the suspended cutoff wall and the river boundary, making it more suitable for realistic foundation pit dewatering conditions compared to other current analytical methods. By introducing the instantaneous release boundary condition of the water table, it can reflect the unsteady seepage characteristics of unconfined aquifers. Utilizing dimensionless methods and Laplace transform, the complex unsteady seepage problem is transformed into a solvable analytical form, and combined with numerical inverse transform, a time-domain solution is efficiently obtained. This provides a rapid calculation tool for engineering projects and serves as an important verification method for numerical simulations.

The present application relates generally to methods and systems for delivering amendments like sulfate to a subsurface below a ground surface. In one embodiment a process comprises advancing a borehole from the ground surface to the subsurface below the ground surface wherein the borehole is advanced above a water table. The borehole is at least partially filled with a mixture comprising gypsum and a granular media. The borehole is then irrigated with water to at least partially dissolve the gypsum and to spread the dissolved gypsum to a desired treatment zone below the ground surface. The irrigating may comprise employing a gravity fed trickle flow using an irrigation line while the desired treatment zone may comprise one or more hydrocarbons.

The invention discloses an existing line roadbed settlement prediction method and system during foundation pit excavation based on water pressure, and the method comprises the steps: S100, constructing a three-dimensional fluid-solid coupling numerical model, and setting a soil constitutive relation, an initial pore water pressure field, and a boundary condition of a stratum initial ground stress field; s200, the dissipation process and the dynamic distribution condition of the internal and external pore water pressure of the foundation pit and the space descending curved surface of the underground water level under different construction stages are calculated; s300, fluid-solid dynamic coupling solving is conducted on the real dynamic load, the updated pore water pressure field at the current construction stage and the soil body effective stress state, and an additional stress field of the stratum under the action of the dynamic load and the static load is calculated; s400, superposing dynamic deformation displacement data of soil bodies close to the composite foundation and the underlying layer in each excavation and precipitation stage; and S500, generating an existing line roadbed settlement prediction curve which changes along with time and space, and outputting a final settlement prediction quantitative index. And the accuracy and reliability of settlement prediction under complex hydrogeological conditions are improved.

The present invention discloses a method for simply measuring the flow direction and velocity of groundwater using a shore water well. The method comprises the following steps: Step 1: Survey the shore water well and measure the groundwater level elevation H at the center point A of the well. A ; Step 2: Measure and locate the water line along the shore A The water level elevation point B is equal; Step 3: connect line AB, draw a perpendicular line CD through point A, and drill a hole at point E on line CD; Step 4: conduct a permeability test in the borehole to obtain the permeability coefficient K of the aquifer; Step 5: after the borehole is completed, conduct water level observation to obtain the stable groundwater level elevation H in the borehole E ; Step 6, according to H A 、H E The relative size and the principle that water flows from high water level to low water level determine the direction of groundwater flow; Step 7: According to Darcy's law of seepage v = K·i, determine the groundwater flow velocity. The present invention has the advantages of accurate and reliable measurement results and saves drilling workload and man-hours.

The invention provides a side slope building site selection method and system based on collapsible loess geographical factors, and relates to the field of building site selection, the method comprises the following steps: obtaining geographical parameters including topographic data, side slope data, geological data and seismic data; historical weather data, weather data and underground water level height are obtained; determining a first relation function according to the geographic parameters, the weather data and the underground water level height; determining an underground water level qualification identification result according to the first relation function, the geographic parameters and the historical weather data; determining an earthquake influence qualification identification result according to the earthquake data and the slope data; and building site selection is carried out according to the earthquake influence qualification identification result and the underground water level qualification identification result. According to the method, building site selection can be carried out according to the underground water level height condition and the influence condition of an earthquake on the slope top position, and the safety and rationality of building site selection are improved.

The invention discloses a method, a device, equipment, a medium and a product for determining the position relation between a buried pipeline and a diving surface, and relates to the technical field of underground water hydrogeological survey. According to the method, the pipeline elevation and the underground water level elevation corresponding to the key coordinates are extracted based on the continuity characteristics of the pipeline and the diving surface, the cutting problem of a complex space body and a curved surface can be simplified into the numerical value comparison problem, and the processing work amount of the whole process is greatly simplified. The position relation between the buried pipeline and the diving surface can be quickly and accurately found out, the visual position of the pipeline influenced by underground water is calibrated / positioned, and a specific quantitative result is output.

The utility model discloses a kind of water table water pressure monitoring alarm, it is related to water pressure technical field, including T pipe and the first threaded ring and second threaded ring respectively threaded connection in its both ends, the middle part of the T pipe is threadedly connected with alarm mechanism, the alarm mechanism includes water pressure sensor, carrier assembly and sound warning component, the alarm is installed in the water inlet end of water table, when using, water first passes through the T pipe of alarm again enters water table, water pressure sensor is located in the middle part of T pipe, real-time measurement water pressure, the digital signal of water pressure sensor is received by single-chip microcontroller inside ring shell, control instruction is sent to motor, after motor is electrified, drive fan ring rotation, and multiple through slots in the edge of fan ring pass through the through-hole of outer sleeve ring alternately, thereby produce explosive sound, sound is spread outward through loudspeaker mouth, play alarm function, water pressure sensor measures pressure at water table water inlet end, without manual inspection, achieve timely and effective monitoring, reduce unnecessary loss.

The present application relates to experimental device and method for monitoring capillary zone thickness, the device includes sand column and water level adjusting mechanism, the inside of sand column is provided with partition, sand column is provided with sand column water inlet and sand column drain on it; Sand column is provided with a plurality of pressure water head monitoring holes and a plurality of moisture content monitoring holes;The water level adjusting unit includes container, the container is provided with container water inlet, container water outlet and sand column water supply opening connected by pipeline sand column water inlet;The device of the present application can measure the maximum capillary rise height of different soils through drainage experiment, since the drainage of sandy soil is not instantaneous and has certain hysteresis, therefore, the present application can also observe the dynamic change of unsaturated zone soil moisture profile with groundwater level fluctuation by the driving of external periodic water head;The device can be used for the mechanism research of the influence of inland river flow water level sudden rise on groundwater level and the interaction of coastal groundwater and ocean.