38 results about "Hydraulic conductivity" patented technology

The invention belongs to the technical field of hydrology and water resources, and discloses a cold and dry mountainous area drainage basin runoff simulation method based on an MIKE SHE / MIKE 11 coupling model in combination with GIS / RS data. According to the multi-source data fusion technology, a cold and dry mountainous area distributed input data set is constructed through TRMM satellite rainfall data, an MODIS LAI product and an ASTER DEM, and the rainfall space representation precision is improved by 40%. According to the model coupling mechanism, an MIKE SHE / MIKE 11 collaborative simulation framework is provided, earth surface-groundwater flow data interaction is achieved through river channel linkage, and the complex river network flood routing simulation error is reduced to 10% or below. According to the parameter partition calibration method, a drainage basin is divided into five hydrogeological regions, sensitive parameters such as a Manning coefficient and a hydraulic conduction coefficient are optimized in combination with a genetic algorithm, and the basic flow simulation precision is improved by 25%.

The application provides a soil vertical water flux monitoring method and system, and belongs to the technical field of soil water monitoring. The method comprises the following steps: collecting multi-layer soil water content and water potential data in real time, calculating soil vertical water flux of each layer by combining soil hydraulic conductivity, and determining soil water balance plane depth by detecting vertical water flux direction change. The upward evapotranspiration flux and downward seepage flux are calculated respectively based on the balance plane. The application can accurately identify the balance plane of vertical water migration direction change, realize synchronous dynamic monitoring of evapotranspiration and seepage, and effectively improve the continuity and accuracy of soil vertical water flux monitoring.

The invention discloses a dynamic monitoring system and method for soil water seepage characteristics based on multi-sensor fusion, and the system comprises a data collection module which collects the original data of soil moisture content, matrix potential and temperature through a plurality of integrated sensing units; the data preprocessing module is used for carrying out time synchronization and anomaly correction on the original data and generating water content, matrix potential and temperature data streams; the dynamic collaborative inversion module is used for resolving a soil hydraulic characteristic parameter group of each unit position in real time based on a space-time gradient change relation of a soil hydrodynamic model coupling data flow; and the space-time adaptive fusion module is used for carrying out space interpolation and time deduction by introducing a fusion algorithm taking a soil hydrodynamic model as a covariable according to the parameter groups and the temperature data streams of all the units, and generating a saturated permeability coefficient field and an unsaturated hydraulic conductivity parameter field of continuous space-time evolution. The spatial-temporal resolution and the real-time sensing capability of dynamic evolution of the soil moisture field are improved, and the requirements of precision agriculture and disaster early warning are met.

The application discloses a kind of fruit hydraulic conductivity and biomechanical parameter measurement method and device;The measurement method includes the following steps: step 1: sampling;Step 2: measure initial fruit water potential Ψ f0 With pressure chamber;Step 3: do fruit water absorption experiment;Step 4: measure fruit pressure-volume curve (P-V curve);Step 5: measure fruit stalk + calyx hydraulic resistance and fruit stalk hydraulic resistance, respectively Rc And Rs;Step 6: data processing.The fruit hydraulic conductivity and biomechanical parameter measurement method and device, the hydraulic conductivity affecting fruit water transport and the biomechanical parameters such as volume elastic modulus, cell wall coefficient of extension, critical point swelling pressure and other influencing factors affecting cell elastoplastic deformation are conveniently obtained, which is convenient for studying fruit swelling growth, and helps to deeply understand the physiological mechanism of fruit cell swelling and its response law to changes in different habitat elements.

The application discloses a kind of rice irrigation area field dynamic hydrological process simulation method and system, method includes: the spatial correlation information base of rice field and ditch is constructed;With day as step simulation cycle, according to the dynamic adjustment effective field height of rice growth stage, based on field type and water level potential energy difference calculation lateral recharge or discharge;According to the exponential decay correction of plow pan saturated hydraulic conductivity of consecutive flooding days, calculate vertical infiltration amount;Overflow drainage, lateral discharge, vertical infiltration are updated into water balance equation field water depth;According to the topological network of confluence of field spatial position and elevation, consider the peak-shaving superposition of confluence time delay, obtain sub-basin export total runoff.It realizes the whole process fine simulation of field ridge water storage, field-ditch lateral interaction, plow pan nonlinear infiltration and distributed confluence, significantly improves the precision of rice irrigation area hydrological process simulation, provides scientific basis for irrigation water resources management.

The application discloses a kind of simultaneously determining the measurement system and method of soil water characteristic curve and unsaturated permeability coefficient, comprising: sample chamber, pressure chamber, water supply side, drainage side, manual valve, differential pressure gauge, solenoid valve, PC end and electronic scale.PC end is connected with electronic scale, for recording experimental data;Sample chamber is used to place sample, pressure chamber is used to place sample chamber and pressurization, drainage side and water supply side are each provided with three burettes, and are divided into standard burette and measuring burette, wherein standard burette applies variable head method to measure permeability coefficient in permeation experiment, measuring burette is used to measure the change amount of soil water volume, differential pressure gauge is used to measure the head pressure difference of standard burette and measuring burette and connect solenoid valve to realize the automatic control of soil water inlet and drainage.The application has the advantages that: water level is adjusted using solenoid valve, to realize the automation of measurement process;SWCC curve and permeability coefficient can be simultaneously measured;Instrument cost is low, and measurement result accuracy is higher.

The application discloses a deep mine super-high confined water gushing prediction method and system and a storage medium, and comprises the following steps: constructing a three-dimensional hydrogeological parameter model; dividing the three-dimensional hydrogeological parameter model into a back-calculation target area and a non-target area according to the excavation response priority; summing up the equivalent exposed areas of the shaft and the roadway to obtain the total equivalent exposed area of the present situation of the mining area, and substituting the three-dimensional hydrogeological parameter model to obtain the initial equivalent water inflow; when the deviation between the initial equivalent water inflow and the present situation of the total measured water inflow is greater than the set deviation threshold, the local back-calculation calibration is carried out on the water conductivity parameters in the back-calculation target area to obtain the present situation calibration model; based on the present situation calibration model, the normal water inflow of the mine and the maximum water inflow of the mine are predicted in the subsequent production stage; by establishing the water inflow equivalent quantitative constraint calibration model, the present application can realize the partition parameter adjustment and guarantee the reasonable and interpretable parameters, and greatly improve the water conductivity channel identification and water inflow prediction accuracy.

The invention provides an anti-clogging composite drainage network and a preparation method thereof, and relates to the technical field of drainage networks. Comprising a net core and geotechnical cloth fixedly arranged on the two sides of the net core, the net core sequentially comprises an inner core and an outer core from inside to outside, the inner core is glass fiber reinforced HDPE, and the outer core is a polyurea coating; the geotechnical cloth is PP + ES geotechnical cloth. The problems that a net core is poor in compression resistance, low in hydraulic conductivity and low in transverse stretching, and geotechnical cloth is poor in acid and alkali resistance are solved.

The utility model belongs to the technical field of soil saturated hydraulic conductivity measurement, and particularly relates to a simple soil saturated hydraulic conductivity measurement device which comprises an upper fixing plate and a lower fixing plate, the lower fixing plate is mounted below the upper fixing plate, and a water outlet pipe is mounted at the bottom of the lower fixing plate; the lifting mechanism is used for automatically lifting the upper fixing plate and comprises fixing rods vertically installed at the four corners of the top of the lower fixing plate and springs arranged on the four fixing rods in a sleeving mode, and the top ends of the four fixing rods movably penetrate through the upper fixing plate; the upper fixing plate can be always kept suspended above the lower fixing plate through the lifting mechanism, at the moment, the distance between the upper fixing plate and the lower fixing plate is larger than the height of two overlapped cutting rings, when the cutting rings are placed, the overlapped cutting rings are directly placed on the top of the lower fixing plate, and therefore the cutting rings can be placed conveniently. The upper fixing plate does not need to be disassembled additionally, and the step of installing the cutting ring is simplified.

The invention relates to the technical field of geological disaster prevention and control safety, in particular to a regional rainfall landslide stability assessment method based on a Scoops 3D and TRIGRS coupling model. The method comprises the following steps: acquiring a multi-source geographic data set of a target area; constructing a regional three-dimensional geologic structure model based on the multi-source geographic data set; performing permeability coefficient correction on the regional three-dimensional geological structure model to obtain a vegetation correction geological parameter set; performing saturated hydraulic conductivity parameter calibration on a preset TRIGRS model based on the vegetation correction geological parameter set to obtain a hydrological parameter optimization set; and performing root enhancement factor coupling based on the hydrological parameter optimization set to obtain a biomechanical coupling parameter set. According to the method, the problem of parameter calibration deviation caused by ignoring vegetation heterogeneity of a traditional model is solved, and the precision of vegetation-covered area landslide risk assessment is remarkably improved.

This invention discloses a method for simulating complex slope runoff based on multi-source data fusion. It includes: fusing UAV LiDAR, ground-penetrating radar, and remote sensing images, and considering physical coupling relationships such as vegetation root systems, to generate a high-precision and physically consistent initial surface parameter field; identifying micro-topographic depressions using graph cutting algorithms and constructing a dynamically evolving slope overflow network based on a depression-filling-overflow mechanism; establishing a dynamic feedback control mechanism of overflow-scour-infiltration: the scour intensity calculated based on overflow data is used to correct the soil saturated hydraulic conductivity in real time, and the corrected parameters are then fed back into an improved Green-Ampt infiltration model; and outputting the spatiotemporal distribution of slope runoff through multi-timescale algorithm coupling, which can trigger early warning and invert critical rainfall conditions. This invention can simulate the dynamic feedback process of the underlying surface, improve simulation reliability, and provide technical support for flash flood early warning.

The utility model provides a cutting ring seal box for measuring saturated hydraulic conductivity, which relates to the field of soil detection and soil scientific experiment equipment and comprises a seal box body, a top cover is mounted at the top of the seal box body, a bottom cover is mounted at the bottom of the seal box body, the seal box body, the top cover and the bottom cover are cylindrical, a water inlet is arranged on one side of the top cover, and a water outlet is arranged on the other side of the bottom cover. A water inlet is formed in one side of the bottom cover, a water outlet is formed in one side of the bottom cover, pipe plugs are connected to the water inlet and the water outlet in a clamped mode, the cutting ring sealing box serves as a key accessory for soil saturation hydraulic conductivity measurement and has the remarkable beneficial effects, multiple functions are creatively integrated, and in a traditional mode, the soil saturation hydraulic conductivity measuring device is convenient to use. Different treatment processes and equipment are often needed for soil saturated hydraulic conductivity measurement and soil moisture characteristic curve measurement through a centrifugal machine, however, according to the sealing box, the cutting ring which is used for extracting undisturbed soil can be directly embedded into the box body, a special cutting ring is not needed for sampling and measurement, and the sampling workload is greatly reduced.

The invention relates to a concrete saturated hydraulic conductivity measuring device, and relates to the technical field of building material performance test.The concrete saturated hydraulic conductivity measuring device comprises a water supply tank, one side of the water supply tank is connected with a first measuring mechanism through a water supply mechanism, and the first measuring mechanism is arranged on a mounting plate; according to the invention, water is supplied to the first measuring mechanism through the water supply mechanism, and the first measuring mechanism and the second measuring mechanism are used for effective measurement; therefore, the problems that a traditional concrete saturated hydraulic conductivity measuring method can only measure one set of equipment and cannot test multiple sets of concrete saturated hydraulic conductivity at the same time, so that the measuring time is seriously influenced, the time is wasted, the automation degree and the testing efficiency are not high, and the testing cost is low in the prior art are effectively solved. The requirements of large-scale engineering test and scientific research work are difficult to meet.

The present application relates to the technical field of numerical simulation of ecological hydrological process, and discloses a sand-distributed ecological hydrological two-way coupling modeling system, which comprises initialization and discretization, ecological growth calculation and source item generation, rhizosphere biochemical environment evolution and hydraulic constitutive correction and fluid transport solving modules, a finite difference grid is constructed in the system, and a root exudate release source item is calculated based on a current water state; exudate migration is simulated to reconstruct an effective dynamic viscosity of fluid and a dynamic contact angle of a sand particle surface; the soil unsaturated hydraulic conductivity and the matric potential are corrected according to the reconstructed parameters, a fluid transport control equation is solved to update the water distribution, and the state is fed back to the ecological module to form a closed loop. Through simulation of the rheological resistance and infiltration shielding effect induced by root exudate, the present application solves the problem that the traditional model ignores the dynamic evolution of the physical properties of the medium, and improves the physical authenticity of the simulation of the hydrological process in the arid region.

1. The name of the design product: soil infiltration apparatus. 2. The use of the design product: for measuring the hydrological properties of soil, in particular the saturated hydraulic conductivity of soil. 3. The design features of the design product: in shape. 4. The picture or photo that best indicates the design features: perspective view.

The invention relates to the technical field of ecological environment management and agricultural water and soil engineering, in particular to a dry sand ecological terrace transformation method which comprises the steps that grain composition and shear characteristic data of matrix sandy soil are obtained, and the side wall dip angle and the vertical depth of an inverted wedge-shaped groove are determined; an inverted-wedge-shaped shear key shear strengthening calculation logic is constructed, and the total shear strength of the composite structure is generated; obtaining a moisture characteristic curve of the backfill improved alien soil and the matrix sandy soil, and determining an air inflow value and a saturated hydraulic conductivity; the backfill thickness and particle size grading of the improved soil dressing layer are determined, and layered backfill is completed to construct a discontinuous capillary retardation interface; presetting a safety coefficient threshold value; collecting real-time monitoring data of the ecological terraced field of the dry sand land; obtaining a stability evaluation result, and generating a corresponding irrigation regulation and control strategy or emergency drainage strategy according to the evaluation result; the problem that the shear strength is insufficient due to the fact that the sand matrix is loose is effectively solved, and the anti-sliding capacity and the overall structure stability of the side slope are remarkably improved.

The invention belongs to the technical field of groundwater environment, and relates to a multi-source heterogeneous data fused groundwater pollution risk prediction method, which comprises the following steps of: constructing a standardized multi-dimensional input data set containing a water quality state and an environment driving factor; constructing an initial hydrogeological topological graph of the underground water monitoring area; generating a dynamic physical state diagram reflecting the real-time hydraulic conduction capability; generating a node depth feature sequence capable of representing an independent change rule of each monitoring point; calculating a space source intensity attention matrix representing local emission abnormity; constructing a time conduction attention flow based on physical state constraint; and generating a global groundwater pollution risk prediction result, fusing the space source intensity attention matrix and the time conduction attention flow, and outputting the future risk probability of each node. According to the method, the problem that data adaptability and physical consistency of the model are difficult to consider due to the fact that a physical mechanism model and a data driving model are separated from each other in an existing prediction method is solved.

This invention provides a method and system for calculating rock permeability, relating to the field of permeability measurement technology. The method includes: acquiring a three-dimensional grayscale volume of the target rock; converting the three-dimensional grayscale volume into a porous solid binary volume; calculating the Euclidean distance from each pore voxel in the porous solid binary volume to the nearest solid interface to construct an Euclidean distance transformation field; extracting a pore network model and generating a pore throat section based on the Euclidean distance transformation field using a watershed segmentation algorithm; calculating the pore throat hydraulic conductivity coefficient based on the cross-sectional characteristics of the pore throat section, and backfilling the pore throat hydraulic conductivity coefficient into the pore network model to obtain a pore network model with pore throat conductivity properties; solving the pore network pressure distribution of the pore network model with pore throat conductivity properties using a dual-grid domain alternating solution method; and calculating the permeability of the target rock based on the pore network pressure distribution.

The application discloses a kind of rock-soil water supply degree and permeability coefficient measuring device, specifically related to rock-soil engineering technical field, including: bottom plate, the bottom plate top end four corners are fixed with one support rod, four The top of support rod is fixed with a top plate;Measuring tube, the measuring tube top end and bottom end are equipped with water inlet frame and water outlet frame respectively;Cleaning frame, the cleaning frame top is fixed with cleaning frame.This application pushes out the rock-soil column in the measuring tube by cleaning frame, and the water leakage hole can clean the inner wall of the measuring tube during the process of pushing out, can automatically realize the pushing out and cleaning of rock-soil column in the measuring tube, and when multistage electric telescopic rod drives the measuring tube to descend and rotate, another rock-soil column sample to be measured can be formed in the measuring tube, and then the next measurement is carried out, so that rock-soil sample is more convenient in multiple measurement process, effectively improve the efficiency of rock-soil water supply degree and permeability coefficient measurement.

The present application relates to the technical field of geological disaster prevention and control safety, and more particularly to a regional rainfall landslide stability evaluation method based on a coupling model of Scoops3D and TRIGRS. The method comprises the following steps: obtaining a multi-source geographic data set of a target region; constructing a regional three-dimensional geological structure model based on the multi-source geographic data set; correcting the permeability coefficient of the regional three-dimensional geological structure model to obtain a vegetation corrected geological parameter set; calibrating the saturation hydraulic conductivity parameter of a preset TRIGRS model based on the vegetation corrected geological parameter set to obtain a hydrological parameter optimization set; and coupling the root reinforcement factor based on the hydrological parameter optimization set to obtain a biomechanics coupling parameter set. The present application solves the parameter calibration deviation problem caused by the traditional model ignoring the heterogeneity of vegetation, and significantly improves the accuracy of landslide risk assessment in the vegetation coverage area.

The invention relates to the technical field of geological survey and leakage prevention and control, in particular to a leakage channel identification method based on multi-source data fusion and geophysical exploration, which comprises the following steps: firstly, fusing remote sensing, geological and topographic data to delineate a macroscopic leakage target area; and a stratum-structure-karst ternary coupling geologic structure model is constructed to identify a potential dominant seepage path. And then accurately positioning the spatial position of the karst channel in a target area by taking a dominant corrosion potential field in the model as a prior constraint and combining inversion of data of a high-density electrical method and an audio magnetotelluric method. And then the channel hydraulic connectivity is verified and quantified through groundwater dynamic response analysis and a tracing test. And finally, integrating all data to establish a three-dimensional visual model, endowing the unit with a dynamic equivalent hydraulic conduction coefficient, and realizing accurate identification of a leakage channel and quantitative evaluation of leakage. According to the invention, the accuracy of leakage channel identification is improved.

The present application relates to the technical field of environmental monitoring and soil analysis, and specifically relates to a detection method and system for improving the water holding function of ecological restoration, which aims to accurately measure the soil saturated hydraulic conductivity and effective water content at the regional scale, to adaptively estimate the observation error of each remote sensing pixel by collecting multi-temporal and spatial remote sensing data and ground plot monitoring data in the ecological restoration area and the control area, to obtain preliminary simulation results by running the water holding function simulation module, to dynamically correct the model state variables by using the ensemble Kalman filter algorithm to fuse the remote sensing soil moisture data at the monthly or quarterly cycle, to optimize the key parameter field of the model based on the corrected state sequence, and finally to generate the spatialized quantitative evaluation results and visual report of the water holding function improvement amount by comparative analysis. The present application realizes the indirect, large-scale and accurate measurement of the key hydraulic parameters of soil, and is mainly used for the accurate and spatialized detection and evaluation of the water holding function improvement effect after the implementation of the ecological restoration project.

The invention relates to the technical field of environment monitoring and soil analysis, in particular to a method and a system for detecting the improvement effect of an ecological restoration water retention function, and aims to accurately determine the soil saturated hydraulic conductivity and effective water content of regional scale and determine the improvement effect of the ecological restoration water retention function by collecting multiple space-time remote sensing data and ground quadrat monitoring data of an ecological restoration region and a contrast region. Self-adaptively estimating the observation error of each remote sensing pixel; operating a water retention function simulation module to obtain a preliminary simulation result, and dynamically correcting a model state variable by taking a month or a quarter as a period and fusing remote sensing inversion soil moisture data by utilizing an ensemble Kalman filtering algorithm; and optimizing a model key parameter field based on the corrected state sequence, and finally generating a spatial quantitative evaluation result and a visual report of the water retention function improvement amount through comparative analysis. According to the invention, indirect, large-range and accurate measurement of the key hydraulic parameters of the soil is realized, and the device is mainly used for accurate and spatial detection and evaluation of the water retention function improvement effect after the implementation of an ecological restoration project.

The invention relates to the technical field of soil water seepage detection, in particular to a soil water seepage detection device for geotechnical engineering, which comprises a mounting bottom plate, a round hole formed in the end surface of the mounting bottom plate, an adjusting part mounted on the left side of the end surface of the mounting bottom plate, and a fixing part mounted on the right side of the end surface of the mounting bottom plate. The round hole is located between the fixing piece and the adjusting piece, the adjusting piece is rotationally provided with one mounting plate, the fixing piece is rotationally provided with the other mounting plate, the end faces of the two mounting plates are provided with a plug connector in a matched mode, and the bottom faces of the two mounting plates are provided with an auxiliary piece in a matched mode; in the using process of the device, through mutual cooperation of the structures, soil wall collapse is prevented, an initially designed water injection boundary can be kept, accordingly, the relation between the infiltration area and time is accurately calculated, real soil infiltration rate, saturated hydraulic conductivity and other parameters are obtained, and the effect of improving the accuracy of detection data is achieved.

The invention discloses a high and cold arid region disturbed slope multi-field coupling ecological restoration system, and relates to the technical field of ecological engineering, and the system comprises a slope unit division module, a capillary fracture sensing module, an interface finger flow identification module and a restoration regulation and control module. Rasterization division is carried out on a slope area based on high-resolution topographic data and disturbance characteristic parameters through a slope unit division module, space topography and disturbance information of each unit is extracted, a potential flow indicating risk area is identified, and a slope coupling unit division graph is formed; the capillary fracture sensing module is used for acquiring the water content and pore water pressure of a soil profile, identifying a capillary water fracture zone and calculating a capillary coupling index CMI (x, y); the interface flow identification module is used for synchronously acquiring the seepage velocity and the hydraulic conductivity of a section, identifying the sudden change of a seepage path and constructing an interface flow index IFI (x, y); and the restoration regulation and control module formulates and dynamically adjusts a water management and ecological restoration strategy according to the CMI and IFI indexes of each coupling unit.

The invention discloses a ground drip irrigation opening arrangement and flow setting optimization method for efficient water retention of soil, and aims to solve the problems of low water utilization rate and poor water retention effect of a root system layer caused by empirical design in traditional drip irrigation. Soil hydraulic parameters (including matrix potential-water content relation, saturated hydraulic conductivity and the like) are measured, a three-dimensional Richards equation model is constructed for numerical simulation, a multi-working-condition drip irrigation opening arrangement scheme (such as symmetric double-circle, annular or strip-shaped) and a flow control strategy (such as pulse type or variable flow irrigation) are designed, an optimal scheme is screened out by solving the model, and the optimal flow control strategy is used for controlling the flow of the drip irrigation openings. Therefore, the water retention capacity of a specific soil area such as a root system layer is improved. The embodiment shows that compared with a traditional symmetrical circular layout, the optimized annular drip irrigation opening layout has the advantages that under the condition that the total irrigation amount is the same, the average moisture content of a root system layer can be increased by about 11%, the high moisture maintaining time can be prolonged by about 30%, the remarkable water saving effect is achieved, the implementation cost is controllable, and expandability is high.

Described herein relates to a filtration media and associated water treatment system and method for removing color from water impacted by dissolved natural organic matter (“NOM”). In an embodiment, the filtration media comprises sand, clay, zero-valent iron (“ZVI”), and perlite, wherein the composition includes between 83% and 90% sand, between 3% and 8% ZVI, between 3% and 6% perlite, and up to 5% clay by percent volume. The media may exhibit a BET surface area between 2.0 and 3.0 m2·g−1, a porosity of at least 25%, a density of at least 2.5 g·cm−3, and a saturated hydraulic conductivity between 10−3 and 10−5 m·s−1. The filtration media may be disposed within a treatment cell and configured to reduce color to below 40 Pt—Co units, including by formation of iron-organic and aluminum-organic complexes during treatment.

An information processing device (100) comprises: a position information acquisition unit (111) that acquires position information indicating the positions in the horizontal direction of a water intake point and a paddy field; a total hydraulic head curved surface information acquisition unit (113) that acquires total hydraulic head curved surface information indicating the total hydraulic head curved surface of a region including the water intake point and the paddy field, the total hydraulic head curved surface extending in a first direction along the horizontal direction and in a second direction along the horizontal direction and orthogonal to the first direction; a soil information acquisition unit (116) that acquires soil information related to the attribute of soil in the region; a groundwater path calculation unit (120) that calculates a groundwater path from the paddy field to the water intake point by applying the steepest-descent method to the total hydraulic head curved surface of the region, on the basis of the total hydraulic head curved surface information acquired by the total hydraulic head curved surface information acquisition unit (113); a hydraulic conductivity acquisition unit (121) that acquires the hydraulic conductivity along the path calculated by the groundwater path calculation unit (120), on the basis of the soil information acquired by the soil information acquisition unit (116); and a recharge degree calculation unit (123) that calculates a recharge degree indicating the degree of recharging with water at the paddy field for the water intake point, on the basis of the length of the path calculated by the groundwater path calculation unit (120) and the hydraulic conductivity acquired by the hydraulic conductivity acquisition unit (121).

The application discloses a realization method and device for coastal heterogeneous aquifer characterization based on machine learning, and comprises the following steps: obtaining a plurality of sets of hydraulic conductivity coefficients randomly generated from a parameter prior distribution and corresponding model output simulation data from a seawater intrusion numerical model; generating a large number of samples of parameter difference and simulation data difference from the prior set through pairwise subtraction between samples; training a machine learning model by using the above data, and constructing a mapping relationship between the simulation data difference and the parameter difference; inputting the difference between the observation data and the prior simulation data set into the trained machine learning model, adding the obtained output to the prior parameter set, and obtaining the update result of the prior hydraulic conductivity coefficient set; and implementing iterative updating to obtain the hydraulic conductivity coefficient after iteration. The method can identify complex features and learn nonlinear relationships from training data, and optimal inversion effect is achieved in the characterization of complex non-Gaussian coastal aquifers.

The application discloses a soil saturated permeability coefficient obtaining method, system, device and storage medium, belongs to the field of geotechnical engineering, hydrology and environmental geology, and the method comprises the steps of: calculating the effective particle size of soil based on particle size distribution data; obtaining soil porosity; and obtaining the saturated permeability coefficient based on solid-liquid two-phase fluid mechanics equations. By incorporating porosity, the effective particle size of particle distribution and water flow density and other parameters are embodied, the synergistic effect of multiple parameters is quantified and comprehensive influence is achieved, the single parameter dependency of traditional empirical formula is broken through; meanwhile, the formula is derived based on fluid mechanics theory, the simplification defect of the theoretical model is broken through, the calculation efficiency is significantly improved on the basis of ensuring the theoretical rigor. By incorporating porosity and effective particle size based on particle size distribution, and the square form of the two, the difference in the structure of non-homogeneous soil is amplified, the difference in the water flow path is reflected in combination with the fluid mechanics theory, so that the difference in the seepage characteristics is accurately quantified.