54 results about "Hydraulic conductivity" patented technology

The invention relates to the technical field of coal mine safety, in particular to a coal mine water disaster prediction system based on a data analysis and machine learning technology, which comprises a multi-source data acquisition module, a dynamic data preprocessing module, a multi-modal feature engineering module, an integrated prediction model construction module and a prediction optimization control module, the multi-source data acquisition module fuses geological and hydrological data, micro-seismic data and equipment working condition data, the dynamic data preprocessing module constructs a noise feature library and realizes noise elimination and data standardization, and the multi-modal feature engineering module extracts dynamic causal feature vectors of a water diversion coefficient change rate and a micro-seismic energy release rate based on convergence cross mapping; the integrated prediction model construction module fuses and outputs a water disaster risk probability value through a meta-learner; and the prediction optimization control module triggers a sampling rate adjustment and disaster response linkage mechanism according to the risk probability value. The method has the advantages of high reliability, high adaptability and timely response, and is suitable for real-time prediction of water disasters in a complex coal mine environment.

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 invention discloses a complex slope runoff simulation method based on multi-source data fusion. Comprising the following steps: fusing an unmanned aerial vehicle LiDAR, a ground penetrating radar and a remote sensing image, and considering physical coupling relationships such as vegetation root systems to generate a high-precision and physically consistent initial earth surface parameter field; the method comprises the following steps: identifying micro-topographic depression through a graph cutting algorithm and the like, and constructing a dynamically evolved slope overflow network based on a depression filling-overflow mechanism; establishing an overflow-scour-infiltration dynamic feedback regulation and control mechanism, wherein the scour intensity calculated according to overflow data is used for correcting the saturated hydraulic conductivity of the soil in real time, and corrected parameters are immediately fed back to an improved Green-Ampt infiltration model; through coupling solution of a multi-time scale algorithm, spatial and temporal distribution of slope runoff is output, and early warning and inversion of critical rainfall conditions can be triggered. The underlying surface dynamic feedback process can be simulated, the simulation reliability is improved, and technical support is provided for mountain torrent early warning.

The invention relates to the technical field of rail transit construction, and discloses an analogue simulation method for a shield mud film gas check test, which comprises the following steps: S1, establishing an analogue simulation system for the shield mud film gas check test; s2, preparing slurry according to requirements; s3, measuring the porosity, density, residual moisture content, water conductivity coefficient, elastic modulus, Poisson's ratio and water holding capacity parameters of the slurry and the stratum soil body; s4, all the material parameters obtained in the S3 are substituted into an analogue simulation system of the shield mud film air closing test, and then a small amount of mud film air closing tests are used for carrying out model verification; and S5, carrying out simulation calculation analysis. According to the method, an indoor gas closing test simulation model is established on the basis of a Biot pore elasticity theory under a fluid-solid coupling condition, different water holding capacity characteristics of a mud film and a stratum are considered, and model verification is carried out through a gas migration rule and leakage flow evolution data obtained through an indoor test; and the rapid evaluation of the closeness characteristic of the mud film under complex geological conditions and shield parameter working conditions is realized.

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.

To provide an ejecta suppression and ground subsidence suppression system of liquefaction ground which confirms that a crushed shell drain composed of a crushed shell suppresses reduction in drainage performance accompanied by mixing of sand compared to a gravel drain, and is effective as a liquefaction countermeasure drain, and in which since the crushed shell is small in dry density and is extremely lightweight compared to a crushed stone, the dead weight in a ground improvement area is small, and the system has an effect for further reducing a ground subsidence amount after liquefaction.SOLUTION: An ejecta suppression and ground subsidence suppression system, ejecta being from an improvement ground surface by earthquake time liquefaction in an improved ground where a crushed shell drain is laid, includes: selecting a crushed shell having such a coefficient of permeability that a seepage pressure by an excess pore water pressure difference of the crushed shell drain laid on the ground is not higher than an effective placement pressure of the crushed shell drain, after liquefaction; laying the crushed shell drain formed of the selected crushed shell; and improving the ground.SELECTED DRAWING: Figure 1

The application discloses a numerical simulation method for evaluating ion type rare earth ore leaching efficiency, and the method comprises the following steps: setting ore solution input flow and ore solution concentration; based on the water content of the ore bed and the unsaturated hydraulic conductivity of the ore bed soil, the matric potential function of the ore bed soil is constructed through Richards equation; then the change relationship of the water content of the ore bed with time is determined; based on the change relationship of the water content of the ore bed with time, the diffusion coefficient is solved through the convection-diffusion equation, and then the ore solution output flow and the rare earth element concentration are determined; and the rare earth ore leaching efficiency is determined according to the ore solution input flow and the ore solution concentration, and the ore solution output flow and the rare earth element concentration. According to the embodiment of the application, on the one hand, the process of the ore solution entering the ore bed can be intuitively understood, and on the other hand, the reaction process of the ore solution and the ion type rare earth can be obtained, and meanwhile, a leaching efficiency evaluation method is provided, which can provide a reference for precise control of the ore washing process in the later period, and can be widely applied to the ion type rare earth ore mining technical field.

The invention relates to the technical field of measurement fixing devices, in particular to a solid waste regeneration type concealed pipe drainage inverted filter and a laying method.The solid waste regeneration type concealed pipe drainage inverted filter comprises an aggregate layer and a fine material layer, the aggregate layer is located below the fine material layer, the aggregate layer is located above a concealed pipe, and the aggregate layer and the fine material layer are integrally narrow in the lower portion and wide in the upper portion; geotechnical cloth 2 is laid among the aggregate layer, the fine material layer and the original soil layer, and the aggregate layer is in contact with the upper half part of the outer side wall of the concealed pipe. According to the invention, through the arrangement of the reverse osmosis layer, the reverse osmosis layer is composed of the aggregate layer and the fine material, the water conductivity of the reverse osmosis layer is larger than that of soil, water in the soil above the reverse osmosis layer can be absorbed into the reverse osmosis layer, and the trumpet-shaped arrangement increases the contact interface between the reverse osmosis layer and the soil, so that the reverse osmosis layer at the upper part of the concealed pipe can rapidly reach saturation; water in the reverse osmosis layer is drained into the concealed pipe under the action of gravity and pressure potential, so that the water content of soil is reduced quickly, and a good drainage effect is achieved.

The present application provides a soil column device and method for simulating soil water and salt leaching under drip irrigation conditions. The method generates simulated moisture information at different depths within the soil column device; pre-installs intelligent moisture sensors and intelligent salt concentration sensors in each soil layer of the soil column device, collects soil moisture information via the pre-installed intelligent moisture sensors, and then determines the degree of fit between the simulated moisture information and the soil moisture information; collects the salt concentration within the soil column device during drip irrigation via the pre-installed intelligent salt concentration sensor, and determines the water-salt permeability coefficient during water and salt migration within the soil column device based on the soil moisture information and salt concentration; adjusts the saturated hydraulic conductivity based on the degree of fit; and uses the adjustment result and the water-salt permeability coefficient to determine the sensitivity of the soil's saturated hydraulic conductivity to water and salt leaching. The present application's solution allows for adaptive adjustment of the leaching simulation process under the premise of dynamic changes in soil physical properties.

The present disclosure provides a method, device, electronic device, and storage medium for evaluating the conductivity of a fault zone. The method comprises obtaining an imaging logging image and / or core image of a target fault zone at a preset location, and determining the number of each diagenetic product at the preset location based on the imaging logging image and / or core image at the preset location and a diagenetic product identification model; determining a cementation weight coefficient and a strain weight coefficient at the preset location based on the number of each diagenetic product at the preset location; calculating a conductivity evaluation parameter at the preset location based on the cementation weight coefficient and the strain weight coefficient; and evaluating the hydraulic conductivity of the target fault zone at the preset location based on the conductivity evaluation parameter. This method qualitatively determines the hydraulic conductivity of the fault zone by identifying and quantitatively analyzing diagenetic products and rock fabric.

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 present disclosure relates to a method for predicting soil hydraulic properties based on an upward infiltration experiment of a cutting ring soil sample. According to the new design approach, based on an inverse process of one-dimensional water upward infiltration analytical solution of homogeneous dry soils under a boundary condition of a constant pressure, by recording the data regarding cumulative infiltration amounts and infiltration times during the upward infiltration process of the cutting ring soil sample and a time for the wetting front to reach the upper surface of the cutting ring soil sample, a saturated hydraulic conductivity of the cutting ring soil sample is measured, and the soil hydraulic properties are quickly obtained. The present disclosure overcomes the defects that the methods in the prior art for measuring soil hydraulic properties are time consuming, low in efficiency, and not suitable for rapid acquisition of large area in the field, avoids the problems of multiple solutions and non-convergence of parameters, and improves the efficiency of acquiring soil hydraulic properties, thereby providing an effective means for the investigation of soil hydraulic properties in a large area in the field.

The invention discloses a method for measuring saturated hydraulic conductivity of soil, and belongs to the field of soil detection. Acquiring a remote sensing image of the to-be-measured area, acquiring vegetation coverage data of the to-be-measured area and gradient size data of the to-be-measured area from the remote sensing image, and acquiring ground temperature data of the to-be-measured area on site; the method comprises the following steps: preprocessing vegetation coverage data, gradient size data and ground temperature data obtained from a to-be-measured area so as to obtain a vegetation coverage correction factor, a gradient correction factor and a ground temperature correction factor of the to-be-measured area; and constructing a soil saturated hydraulic conductivity measurement optimization coefficient of the to-be-measured area. According to the method, the soil saturation hydraulic conductivity optimization coefficient is constructed through the vegetation coverage correction factor, the slope correction factor and the ground temperature correction factor, and the soil saturation hydraulic conductivity reference value is regulated and controlled through the optimization coefficient, so that more accurate soil saturation hydraulic conductivity can be measured, and more accurate guidance can be provided for agricultural production.

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 present invention discloses a method and system for optimizing the permeability coefficient based on the tidal influence of offshore pumping tests, and belongs to the technical field of offshore pumping tests. The sea level height data is obtained through tidal monitoring equipment and an equally spaced sampling sequence is generated, and the water level and groundwater ion concentration in the pumping well are synchronously collected; the main frequency of the tidal signal is dynamically tracked and the time domain translation scale is quantified, and the real-time permeability coefficient is estimated based on Darcy's law; a fuzzy error prediction function and a Kalman filter optimization model are constructed to predict the permeability coefficient adjustment amount; key parameters are dynamically optimized through a discrete time parameter update model and fed back to the system. By integrating the dynamic influence of tides with the response characteristics of groundwater, the present invention solves the problem of permeability coefficient calculation errors caused by tidal fluctuations in traditional pumping tests and can quickly respond to tidal influences, significantly improving the accuracy and real-time performance of offshore hydrogeological parameter assessment.

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.

This application provides an artificial intelligence-based method and system for inverting hydraulic grid parameters. The method involves acquiring multi-source monitoring data of the target hydraulic engineering area and combining it with a pre-defined hydraulic grid physical mechanism model to establish an AI probabilistic inference framework for parameter inversion in heterogeneous media. It iteratively optimizes the implicit correlation between the spatial distribution of permeability and the dynamic change of hydraulic conductivity in the hydraulic grid physical mechanism model, generating a parameter probability distribution set. Based on this parameter probability distribution set and combined with the historical seepage field evolution pattern of the target hydraulic engineering area, the equivalent parameter values ​​of each grid unit in the hydraulic grid physical mechanism model are dynamically corrected to generate hydraulic grid parameter inversion results. This improves the accuracy and stability of hydraulic grid parameter inversion under complex working conditions, providing reliable support for engineering safety and risk early warning of reservoirs and dams.

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 present invention relates to the field of soil and water conservation technology and discloses a method for estimating and configuring soil and water conservation herb cover. The method specifically comprises the following steps: investigating and determining the herb cover in each sample plot; secondly, establishing a functional relationship between the plant's underground root density and the aboveground cover; further, measuring the soil detachment rate and saturated hydraulic conductivity to characterize the soil's soil and water conservation functions; analyzing the relationship between the two parameters and the root density to determine whether the relative soil detachment rate is ≤0.00816 and the saturated hydraulic conductivity is ≥0.54 cm·min ‑1 Root density can be used to estimate the corresponding herb cover. For grasslands with a mixture of taproot and fibrous root herbs, the same method should be used to first determine the fibrous root herb cover that corresponds to the same water and soil conservation function as described above. This can then indirectly determine the taproot herb cover. Using this calculated herb cover to optimize the herbaceous plant ratio will better maximize the soil and water conservation function of the herbs.

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.