101 results about "Water salt" patented technology

The invention discloses a saline-alkali soil dynamic precise irrigation method based on a water-salt-carbon flux coupling model, and relates to the technical field of saline-alkali soil improvement and precise irrigation, and the method comprises the following steps: dividing soil into a surface layer, a middle layer and a deep layer, building the coupling model based on a Darcy law, a convection-dispersion equation and a first-order dynamic model, and simulating a water-salt-carbon flux dynamic state; collecting data such as soil water content, conductivity and organic carbon content through a layered sensor network, and inputting the data into the model after cleaning and fusing; the irrigation time, the irrigation amount and the water quality are optimized through a genetic algorithm in combination with the crop growth period requirements; irrigation is executed through an intelligent valve and a variable frequency water pump, and model parameters are adjusted based on real-time monitoring feedback. According to the method, multi-element cooperative regulation and control of saline-alkali soil irrigation are achieved, the soil ecological process can be accurately simulated, the water resource utilization efficiency is improved, the soil environment is improved, and crop yield increase is promoted.

The invention relates to the technical field of data twinning, in particular to a saline-alkali soil water-salt motion simulation method based on big data analysis. The method comprises the following steps: collecting saline-alkali soil multi-source monitoring data; based on the saline-alkali soil multi-source monitoring data, salt soil layer correlation feature analysis and water-salt driving factor coupling feature analysis are carried out, and salt soil layer correlation feature data and water-salt driving factor coupling feature data are obtained; simulation relation model design of saline-alkali soil water-salt movement is carried out through the saline-alkali soil level correlation feature data and the water-salt driving factor coupling feature data, and a saline-alkali soil water-salt movement simulation model is generated; based on the saline-alkali soil water-salt motion simulation model, designing saline-alkali soil farmland irrigation simulation parameters; and carrying out water-salt motion simulation prediction and feedback of the saline-alkali soil farmland irrigation on the saline-alkali soil farmland irrigation simulation parameters. According to the saline-alkali soil water-salt motion simulation analysis method, multi-driving-factor fusion and accurate spatial heterogeneity description are achieved.

The invention discloses a soil water and salt dynamic monitoring and quality evaluation method based on multispectral remote sensing, and relates to the field of geological monitoring, and the method comprises the steps: carrying out the scattering deviation correction and roughness correction of an observation spectrum through a satellite remote sensing image, an unmanned aerial vehicle multispectral image, a ground sample and meteorological driving data; the soil intrinsic reflectivity, the vegetation coverage component and the salt crusting component are obtained; a water-salt inversion model is established by combining thermal infrared and red edge wave band information, and multi-temporal soil volumetric moisture content and surface salinity index are inverted; by introducing meteorological conditions and vegetation dynamic characteristics, a water-salt coupling partial differential equation and a graph space-time constraint model are constructed, and continuous space-time distribution of soil water content and salinity is obtained; extracting salinity, moisture, vegetation response and soil health indexes, establishing a soil quality comprehensive evaluation model, and outputting high-risk plaques and a treatment priority sequence. The method realizes dynamic monitoring and quality grading evaluation of soil water and salt, and is suitable for saline-alkali soil treatment and ecological restoration.

The invention provides a rapid evaluation method and system for the soil fertility level, and relates to the technical field of soil fertility detection.The rapid evaluation method comprises the steps that an original absorbance spectral data curve is obtained by scanning a soil sample, the moisture peak absorbance, the actual peak position wavelength and the moisture synthetic frequency characteristic peak width are extracted, and a spectral data basis is provided; a water-salt optical path coupling factor is calculated, water-salt correction operation is carried out in combination with a volume correction coefficient, a virtual dry soil spectrum data curve is obtained, interference of salt on a water optical path is quantified, and a water background and salt masking are eliminated; constructing a characteristic virtual baseline of the organic matter and the total nitrogen, calculating an integral area to obtain characteristic intensity of the organic matter and the total nitrogen, and providing a physical input variable for quantitative inversion; introducing a water-salt optical path coupling factor to invert the organic matter content and the total nitrogen content, and correcting signal depression caused by salt stress; the effective fertility index is calculated and graded by combining the organic matter content and the total nitrogen content of the soil, and the actual fertilizer supply capacity of the soil is comprehensively evaluated.

The invention provides a reservoir pressure salinity scheduling method based on a physical information neural network (PINN). The reservoir pressure salinity scheduling method comprises the following steps: Step 1, salinity prediction based on a physical information neural network (PINN) model; the method comprises the following steps: in a PINN model framework, embedding a physical law of salinity conservation into a multi-layer perceptron (MLP) artificial neural network for training so as to carry out salinity prediction; step 2, establishing an estuary water-salt model based on a three-dimensional ocean numerical FVCOM model; step 3, carrying out upstream reservoir salty water pressing and light water supplementing emergency scheduling based on salinity forecast; comprising the following steps: Step3.1, establishing a multi-objective function; and Step3.2, solving a scheduling model. According to the method, the salinity momentum conservation constraint can be considered, the salinity prediction accuracy under the influence of different upstream flows and downstream tidal ranges can be improved, and the emergency scheduling of the reservoir for the salt tide invasion of the estuary drinking water source can be carried out in combination with the scheduling model, so that the water supply safety is ensured.

The invention relates to the technical field of soil drainage and salt improvement, in particular to a coastal saline-alkali soil drainage and salt improvement intelligent regulation and control method and system based on artificial intelligence, and the method specifically comprises the following steps: dividing treatment units, arranging sensing equipment, and collecting multi-source heterogeneous data to form a data set; after data cleaning and time-space synchronization are conducted, standardized feature vectors are obtained through sectional physical perception standardization processing; constructing a graph neural network micro-area irrigation volume demand prediction model, and predicting recommended irrigation volume and soil salinity variation; calculating a loss function of the model and performing iterative training on the model; and performing periodic decision regulation and control circulation on the trained model, converting the output of the multi-source heterogeneous data collected at each decision moment through the model into an instruction, issuing the instruction, and synchronously performing drainage regulation and control. According to the invention, water-salt environment optimization regulation and control can be realized, and an intelligent treatment closed loop is formed.

The invention discloses an intelligent irrigation regulation and control system and method for dynamic balance of water and salt in saline-alkali soil, and belongs to the technical field of intelligent agriculture. Comprising the following steps: collecting dynamic monitoring data influencing the water-salt dynamic state and storing the dynamic monitoring data in a basic database; calculating the crop evapotranspiration water demand based on the data of the basic database; in combination with the calculated crop evapotranspiration water demand and data of the basic database, salt profile estimation is achieved, a dynamic target salt threshold value is set, the self-adaptive leaching water amount is calculated, the salt return risk is evaluated, and an evaluation report at the end of the growth season is generated; based on all calculation and evaluation results, key strategy control parameters for guiding irrigation are generated and optimized by adopting a reinforcement learning algorithm; generating a self-adaptive irrigation strategy and auxiliary measure suggestions by combining all the obtained results and fusing weather forecast data; the irrigation strategy is converted into an irrigation and drainage executable instruction, and meanwhile, the execution state of irrigation and drainage is monitored to be used for achieving double-path feedback.

The invention discloses a long-distance water-salt dynamic regulation and control method and device, a medium and a product, and relates to the technical field of ecological management, and the method comprises the steps: periodically obtaining monitoring data through a real-time monitoring network; determining the opening degree of a flow valve based on a partial pressure technology according to the water pressure and flow data of each node of the water delivery pipe network, and dynamically adjusting the water pressure and flow of each shunt branch in the water delivery pipe network according to the opening degree of the flow valve; according to the water content of the artificial soil layer, a water supplementing strategy is determined based on a vegetation water demand model; according to the salinity value of the artificial soil layer, on the basis of a salinity accumulation risk model, salt control closed-loop control based on a high salinity water active suction band-off mechanism is carried out; according to the invention, dynamic, accurate and closed-loop management of moisture and salinity can be realized.

The invention relates to the field of specific calculation models, and discloses a natural regulation type salinized soil desalination simulation and multi-objective optimization configuration method, which comprises the following steps of: 1, data acquisition and earlier stage processing; 2, constructing a water and salt migration model; step 3, simulation analysis and scheme optimization; 4, carrying out substitution model training and multi-objective optimization; the final scheme is directly used for guiding engineering implementation, and specifically comprises the steps of determining the terrain adjustment amplitude, the position and depth of a drainage ditch, the micro-topographic relief scale, the earth filling and digging volume and shallow guide and drainage path configuration. The method has the beneficial effects that the natural drainage capacity of regional underground water can be remarkably improved, the effect that evaporation drives salt to move upwards is weakened, the rainfall infiltration capacity is improved, and the natural leaching effect is enhanced. The method is suitable for areas such as mud flats, salt pans and natural reserves where artificial engineering measures are not suitable to be taken, and has the advantages of low cost, high stability, ecological friendliness and the like.

The invention provides a comprehensive benefit evaluation method and system for saline-alkali soil improvement based on drainage basin water-salt balance, and belongs to the technical field of agricultural ecological management. The method comprises the following steps: collecting and preprocessing geographical partition data, soil hydrological data, crop salt tolerance data and irrigation management data; constructing a salt migration-yield coupling model, namely establishing a salt migration dynamic equation, substituting the preprocessed data into the salt migration dynamic equation, and calculating the downstream salt concentration; a yield response model is established, the downstream salinity concentration and the preprocessed data are substituted into the yield response model, and the upstream treatment area increased yield and the downstream reduced yield are calculated; and calculating the net benefit value of saline-alkali soil improvement according to the upstream treatment area yield increase and the downstream yield reduction. According to the method, the salinity increment, exceeding the salt tolerance threshold value, of the soil of the treatment area is considered, overall systematic evaluation is carried out on upstream and downstream yield changes, and therefore reliable guidance is provided for selection and optimization of irrigation measures.

The invention discloses a dual-function coupling device for synchronously enhancing photo-thermal evaporation water-salt separation and super capacitor performance. An upper electrode, a water conveying layer and a lower electrode are arranged above a water tank from top to bottom and are tightly attached to each other; the front extending section of the water conveying layer penetrates through a heat insulation layer arranged on the top of the water tank to make contact with seawater in the water tank, the rear extending section of the water conveying layer reaches a side salt precipitation layer arranged on the outer side of the water tank, the upper electrode serves as a photo-thermal / evaporation interface, seawater in the water conveying layer serves as electrolyte, and the water conveying layer serves as a diaphragm. The upper electrode, the water conveying layer and the lower electrode are tightly attached to form a supercapacitor structure, the device can synchronously perform solar photo-thermal evaporation water-salt separation and supercapacitor energy storage, and meanwhile, the device shows a synergistic enhancement effect when working; heat generated in the charging and discharging process of the supercapacitor can improve the evaporation rate to promote water-salt separation.

The present invention provides a method and device system for preparing sodium carbonate and / or sodium bicarbonate and co-producing ammonium sulfate from sodium-based wastewater. According to the phase equilibrium law of a multi-component water-salt system, through the regulation of crystallization kinetics and supersaturation, the sodium-based wastewater does not need to be evaporated and crystallized to produce sodium sulfate solid. Instead, the wastewater after simple pretreatment is directly treated to achieve gradient crystallization separation of sodium sulfate, ammonium sulfate and sodium bicarbonate, thereby obtaining high-quality sodium bicarbonate, sodium carbonate and ammonium sulfate products.

The invention discloses a saline-alkali soil water-salt-fertilizer real-time monitoring system and method based on the Internet of Things, and relates to the technical field of saline-alkali soil monitoring. Multi-parameter sensor nodes are arranged in a preset area to collect soil salinity, moisture, conductivity, pH value and ground temperature information; acquiring a remote sensing image, terrain elevation and land utilization type data, and performing preprocessing and spatial registration; based on the spatial position relation, the hydrological connectivity and the irrigation and drainage structure, establishing a spatial graph structure required by graph neural network input; deploying a model on the constructed graph, and predicting the future salinity trend or saline-alkali risk grade of each monitoring unit; utilizing adjacent node features and an edge weight propagation mechanism to realize prediction extrapolation of a data sparse region; based on a prediction result and an agronomic rule, generating a multi-objective optimization regulation and control scheme through an evolutionary strategy algorithm; and displaying the prediction map, the risk map and the regulation and control suggestions, and triggering early warning and control linkage when the threshold value exceeds the limit.

The application of "a unit type tidal wetland restoration method based on a target" belongs to the technical field of wetland ecosystem restoration methods. The unit type tidal wetland restoration method based on a target comprises the following steps: (1) determining a target; (2) constructing an ecological unit on the tidal wetland to be restored through microtopographic modification; (3) applying biochar materials and salt-resistant ecological materials in the ecological unit; and (4) configuring waterfront plants in the ecological unit. The restoration method utilizes natural tidal fluctuation to adjust the water and salt conditions of the ecological unit (salt reduction of more than 80%) and to maintain the target water level (0-2 m) as needed, optimizes the soil microbial community structure (soil bacterial richness is increased by more than 200%), improves the plant germination rate and survival rate in the process of tidal restoration (the germination rate is more than 90%, and the survival rate is increased to more than 62%), and enriches the plant configuration varieties in the riparian zone (≥12).

Methods of separating water, salt, CO2, and crude oil from wastewater, the methods comprising: providing gas / oil separation system that produces a waste saline water stream and a CO2 stream; providing an electrochemical cell having an anode, a cathode, and three electrodialytic compartments; feeding a fresh water stream to the anode to produce H+ and O2; feeding the waste CO2 stream and O2 to the cathode to produce bicarbonate (HCO3—) and hydroxide ions (OH−); feeding the waste saline water stream to a center electrodialytic compartment; wherein the sodium Na+ from the waste saline water stream reacts with the bicarbonate to form NaHCO3 and the chloride (Cl−) from the waste saline water stream reacts with the H+ to produce hydrochloric acid; and producing salt and desalinated water.

The invention relates to the technical field of water-salt distribution, and discloses a simulation system and method for water-salt evolution of an island aquifer under the influence of underground structures, and the method comprises the steps: prefabricating standard dyeing seawater by adopting NaCl and carmine; diluting standard dyeing seawater in proportion to prepare saturated sand column standard samples with different salinity gradients, and collecting profile images of the saturated sand column standard samples; extracting the average gray value of the section image of each saturated sand column standard sample and the corresponding global temperature and salinity; fitting the average gray value, the global temperature and the salinity corresponding to the saturated sand column standard sample, and establishing a global temperature coupled salinity inversion model; acquiring an experiment profile image and an experiment global temperature of the sea island aquifer water-salt evolution experiment under the influence of the underground structure; and generating a two-dimensional salinity distribution data field according to the salinity inversion model, the experimental profile image and the experimental global temperature. The full-profile image of the aquifer to be measured is collected in real time, the relation between the light intensity and the salinity is established, interpolation processing is not needed, and the simulation result is more accurate.

The invention relates to the technical field of environment monitoring, in particular to a water-salt ratio dynamic monitoring method and system for farmland, and the method comprises the following steps: collecting multi-point tension and conductivity data, carrying out the ratio judgment, delaying the collection if a threshold value is exceeded, synchronously updating a data set, converting salt, calculating the change of the water-salt ratio, and fitting a trend to obtain change information. Evaluating water stress in combination with crop parameters, judging a water demand period, superposing predicted rainfall to generate an interference result, and calculating a water-salt change acceleration recognition intervention point. According to the method, through the water stress index constructed by fusing the transpiration potential base value of the crop and the water content of the root layer, accurate identification of the water demand period of the crop is realized, comparison with the predicted rainfall time interval is carried out, and trend key points influenced by rainwater disturbance are screened; a continuous acceleration change section is identified through a water-salt ratio acceleration sequence formed by a change rate difference value, and an intervention demand point is marked in time under the condition that a continuous trend is enhanced.

The application discloses a power plant water-energy-salt cascade reuse system for flue gas drying integrated coupling, to solve the problems of low resource utilization efficiency and high energy consumption in the zero discharge technology of power plant wastewater. Through the technologies of circulating cooling water cascade reuse, desulfurization wastewater efficient concentration treatment, desulfurization concentrated water flue gas drying treatment and intelligent monitoring and control unit, the efficient reuse of water, salt and energy in the wastewater is realized. The wastewater is treated through multiple membrane processes such as ultrafiltration, nanofiltration and reverse osmosis, so that the cascade water quality reuse for different purposes is realized. The calcium and magnesium ions are extracted through chemical precipitation and used as industrial raw materials, effectively alleviating the membrane pollution problem of subsequent processes. The high-salinity wastewater is dried by flue gas waste heat to produce industrial salt, realizing the recovery of salt resources. The system adopts an intelligent monitoring and control system, realizes real-time monitoring and automatic adjustment, optimizes the operation efficiency of each treatment unit and reduces energy consumption. The application realizes near-zero discharge of wastewater and efficient reuse of resources, and has significant economic and environmental benefits.

The invention relates to the technical field of saline-alkali soil improvement, in particular to a saline-alkali soil sand-peat layered improvement structure and an improvement regulation and control method.The saline-alkali soil sand-peat layered improvement structure sequentially comprises a dry branch and fallen leaf covering layer, a sand-peat mixed layer, a peat layer and a mineral gleying layer from top to bottom, and an irrigation pipeline layer is arranged in the sand-peat mixed layer and / or the peat layer; the mixing mass ratio of the sandy soil to the peat soil in the sand-peat mixing layer is (3-5): 1, the particle size of the sandy soil is 0.1-0.5 mm, and the content of organic matters in the peat soil is 30-50%. According to the sand covering-peat layered improved structure for the saline-alkali soil and the improved regulation and control method, through the design of the sand covering-peat layered structure, the dry branch and fallen leaf covering layer, the sand-peat mixed layer, the peat layer and the mineral gleying layer are arranged, water and salt migration and organic matter distribution are optimized, the local microbial activity of soil is induced to be improved, and the soil quality is improved. The improvement effect is dynamically evaluated by combining an enzyme activity threshold value in a CASH system.

The invention discloses a saline-alkali cultivated land improvement method and system based on dynamic irrigation and drainage regulation, and relates to the technical field of irrigation and drainage regulation, and the method comprises the steps: obtaining soil salinity data, soil moisture data and crop growth data of a cultivation region, extracting salinity migration parameters and water demand parameters, and constructing a water-salt coupling model; performing gridding zoning on the region by combining the salinity concentration distribution and the crop growth period, and calculating the irrigation water amount and the irrigation time of each regulation and control unit; in the irrigation process, root zone salinity and underground water level data are collected, the salinity return moment is recognized, drainage delay is calculated, and the initial drainage moment is obtained; the leaching depth is determined according to vertical distribution of salt in the root zone, evaluation indexes are established in combination with the growth period, drainage time sequences of adjacent regulation and control units are coordinated, and coordinated drainage moments are obtained; and generating an irrigation and drainage regulation and control instruction according to the irrigation and drainage parameters, and outputting and executing. According to the method, dynamic regulation and control of the irrigation and drainage process are achieved, salt drainage efficiency is improved, and salt return is inhibited.

The invention relates to the technical field of analogue simulation, in particular to a root zone salt directional migration simulation method which comprises the following steps: acquiring profile parameters and correcting a feature trajectory, carrying out water-salt simulation to extract an attenuation trend, identifying an outward migration path and outputting a simulated layer. According to the method, a root zone profile environmental parameter map is constructed by a sensor time sequence, and anomaly elimination and substitution are performed on continuous data, so that more stable feature input is formed, a reliable data basis is provided for subsequent simulation, and a concentration decreasing region in a non-root zone direction is extracted in a simulation stage; the directivity of water and salt changes in the space is clearly expressed, a consistent migration route can be automatically screened out from a dynamic change relation by identifying path points continuously keeping an outward migration trend in a time sequence, and a structured salt migration expression mode can be formed by binding a path number and an original layer and uniformly outputting the path number and the original layer. And the relevance, the integrity and the searchability of the outward moving path of the root region are improved.

The invention discloses a WSRS framework-based ecological safety assessment method for a drainage basin in an arid region, relates to the technical field of ecological assessment, and solves the technical problems that the prior art is not adaptive to a coupling process of water, salt, evapotranspiration and underground water and lacks key factors, and an assessment method lacks weight uncertainty description and robustness analysis. The method comprises the steps of S1, acquiring multi-source data of a target drainage basin, and performing data preprocessing; s2, constructing a WSRS evaluation index system, and carrying out standardization processing on indexes; s3, based on the standardized indexes, determining the comprehensive weight of each index by adopting a subjective and objective combination weighting method; s4, performing comprehensive evaluation based on the comprehensive weight, and quantifying uncertainty of an evaluation result by adopting a cloud model to obtain an ecological safety index; s5, constructing a composite stress model and correcting an ecological safety index; and S6, carrying out risk grade division and result visualization. The method has the advantages that the arid region process adaptability is high, the evaluation result is stable and explainable, and the like.

This invention provides a method, apparatus, equipment, and medium for quantitative assessment of salinity migration in composite landscapes. The method includes: acquiring landscape unit distribution information and groundwater monitoring well distribution information within each landscape unit of the composite landscape within a target time period; analyzing soil salinity storage changes, salinity centroid location, and lateral water-salt flux of groundwater based on the landscape unit distribution information and groundwater monitoring well distribution information within each landscape unit to determine multidimensional characteristic parameters of water-salt migration in the composite landscape; determining the lateral flux and spatiotemporal distribution characteristics of salinity in the composite landscape based on the multidimensional characteristic parameters of water-salt migration in the composite landscape to obtain salinity migration assessment results; and implementing zoned management and optimized water resource management based on the salinity migration assessment results. This invention realizes the transformation from single static monitoring to dynamic multidimensional characteristic analysis, providing refined quantitative indicators for accurately assessing the laws of water-salt transport.

The application provides a soil fertility level rapid evaluation method and system, relates to the soil fertility detection technical field, and provides the spectrum data basis through scanning soil samples to obtain the original absorbance spectrum data curve and extracts the water peak value absorbance, the actual peak wavelength and the water combined frequency characteristic peak width; calculates the water salt optical path coupling factor and carries out water salt correction operation to obtain the virtual dry soil spectrum data curve in combination with the volume correction coefficient, quantifies the interference of the salt on the water optical path and eliminates the water background and the salt masking; the characteristic virtual baseline of organic matter and total nitrogen is constructed, and the integral area is calculated to obtain the characteristic intensity of organic matter and total nitrogen, so that physical input variables are provided for quantitative inversion; the water salt optical path coupling factor is introduced to invert the organic matter content and the total nitrogen content, the signal suppression caused by the salt stress is corrected; the effective fertility index is calculated in combination with the organic matter content and the soil total nitrogen content, and is classified, so that the comprehensive evaluation of the actual fertilization capacity of the soil is realized.

The present invention relates to a digital twin scenario-based system for the water-salinization dynamics of an irrigation area, which solves the technical problems of complex systems and low precision. The system comprises a twin data acquisition module; a twin space modeling module for mapping the collected physical parameters into twin entities in a virtual space to construct an irrigation area model, including an engineering layout model, a water-salinity dynamic distribution model, and a water control system model; a salinization analysis and prediction module for analyzing and predicting the salinization of the irrigation area; a salinization control module comprising a player strategy supply module, a strategy evaluation module constructed based on expert knowledge and a historical database, and a distributed expert manual evaluation module. The player strategy supply module is a technical solution for manipulating a variety of control strategies for a virtual space irrigation area water control system, which is obtained through crowdfunding by the general public in a twin virtual space based on the water-salinization dynamic parameters of a certain irrigation area. The system effectively solves the problem and can be used for irrigation area salinization control.

The present application relates to the field of agricultural data analysis, and more particularly to a farmland water-salt evolution law mining system based on time series trajectory clustering, which comprises the following steps: collecting and preprocessing original farmland water and salt data to obtain a two-dimensional time series trajectory set; analyzing the water-salt lag accumulation effect of the two-dimensional time series trajectory set to obtain a first optimization factor; analyzing the local water-salt trajectory fluctuation degree of the two-dimensional time series trajectory set to obtain a second optimization factor; jointly modifying the original single-step distance based on the first optimization factor and the second optimization factor to obtain a final time series similarity distance; and clustering and dividing the final time series similarity distance to extract the farmland water-salt evolution law, thereby solving the problem that the existing dynamic time warping algorithm cannot represent the asynchronous lag difference of farmland water and salt, resulting in the wrong clustering of different water-salt evolution mechanism plots.

The utility model discloses a material test temperature zoning control device under a water-salt-temperature coupling environment effect, which comprises a main test box temperature zoning control device, a protective shell is arranged on one side of the main test box temperature zoning control device, a base plate is arranged in the protective shell through a support, and the base plate is provided with a water inlet and a water outlet. And an inner test box is arranged above the base plate. The temperature zoning control device can be used for performing temperature zoning control on a sample in the inner test box and simulating the working conditions of a buried engineering structure material in an underground water salt environment and an overground low-temperature environment; the temperature gradient and temperature zone control of an engineering structure material in a frozen area above a soil body freezing front surface and an unfrozen area below the freezing front surface is realized; by adjusting and controlling the temperature gradient of a low-temperature freezing area at the top of a sample in the inner test box and the temperature gradient of an unfrozen area at the bottom of the inner test box, the movement of a freezing front surface position and the control of freezing depth are realized, so that the test can accurately and truly simulate water-salt temperature environment working conditions of areas with different freezing depths.

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.

This invention discloses a sensor-based data analysis and processing method for saline-alkali land improvement, relating to the field of agricultural management technology. The method includes: acquiring sensor data and improvement management records of the target saline-alkali land, and correlating them to form an operational dataset to be analyzed, containing sensor change information and management operation information; constructing counterfactual baseline response characteristics when management operation events have not occurred based on counterfactual candidate control data, and mapping these characteristics to actual response characteristics to generate net contribution analysis data; determining the net contribution data of management operation events to the improvement status of saline-alkali land based on the net contribution analysis data, and verifying the consistency of the net contribution data according to the expected response characteristics, thereby generating saline-alkali land improvement analysis and processing data. This invention, by constructing baseline response characteristics when management operation events have not occurred, forms a soil index reference for similar operations that have not been implemented, reducing the interference of water and salt disturbance and plot differences on the judgment of improvement effectiveness.

The application discloses a kind of live water salt agglomerate elimination equipment, it is related to live water salt production equipment technical field, the equipment is aimed at solving artificial salt pouring material elimination salt agglomerate, there is technical problem of great labor intensity, low capacity, low degree of automation production, the equipment includes first conveying frame, first conveying shaft rotatable being installed in first conveying frame inside, first conveying belt being installed in first conveying shaft outside, first dust cover being fixedly connected on the upper end of first conveying frame;Wherein, first conveying frame right side is sequentially provided with weighing bin, vibration fluidized bed bottom shell and second conveying frame, the ground of second conveying frame rear side is provided with rotary dehumidification fan, the equipment uses the cooperation of fluidized bed plate and vibration motor, flow state is uniform, the cooling effect of live water salt is better, effectively prevent salt material and external air cross infection, salt material particle is little damaged, uses the cooperation of air-cooled water cooling unit and rotary dehumidification fan, and salt is cooled and cooled down.