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36 results about "Groundwater depth" patented technology
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Method and system for obtaining relation between groundwater and natural vegetation system
InactiveCN102819047AClarify the meaning of hydrogeologyTo break through the bottleneck problem of the scale mismatch of research objectsOptical prospectingVegetationSensing data
The invention discloses a method and a system for obtaining a relation between groundwater and a natural vegetation system. The method comprises the following steps of: determining a vadose zone strata structure boundary of a researched area, wherein the researched area is a drought or semiarid area; acquiring remote sensing data of the researched area; acquiring vegetation coverage data and groundwater depth and hydrochemical characteristic data of the researched area, which are measured in the field; inverting the remote sensing data of the researched area by utilizing a dimidiate pixel model and acquiring a vegetation coverage image in a satellite pixel scale; generating a groundwater depth and hydrochemical characteristic image in a satellite pixel scale; generating a two-dimensional scatter diagram of a relation between the vegetation coverage and the groundwater depth and the hydrochemical concentration in a satellite pixel scale; and acquiring the relation that the natural vegetation growth is changed with the groundwater depth and the hydrochemical concentration. In the relation between the groundwater and the natural vegetation system, hwich is researched by the invention, spatial scales of research objects are matched; and the relation between the ground water and the natural vegetation system can be effectively and deeply disclosed.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Underground water sampling and detection integrated equipment and use method thereof
InactiveCN109342117ASolve the problem of sampling inspectionConvenient sampling and testingWithdrawing sample devicesTesting waterEngineeringEarth surface
The invention belongs to the fields of underground water sampling and detection, in particular to underground water sampling and detection integrated equipment and a use method thereof. Aiming at theproblem that the existing underground water sampling and detection equipment is inconvenient to sample and detect relatively deep underground water under the earth surface, the following scheme is proposed: the integrated equipment comprises a horizontal mounting table, a support frame is arranged at the bottom of the horizontal mounting table, fixing holes are formed in skirt sections of the support frame, fixing mechanisms are mounted in the fixing holes, a rotating hole is formed in the horizontal mounting table, a rotating cylinder with internal thread at the inner wall is rotationally mounted in the rotating hole, a plurality of threaded rods connected end to end are spirally matched in the rotating cylinder, a driving mechanism for driving the rotating cylinder to rotate is arrangedon the horizontal mounting table, and a guide slot arranged along a length direction is formed on the outside wall of each threaded rod. The integrated equipment is convenient to mount and fix, the continuous splicing of the threaded rod length can be performed according to the underground water depth needing to be collected, so that the relatively deep underground water under the earth surface can be conveniently sampled and detected.
Owner:广东精科环境科技有限公司
A method for optimizing groundwater depth of BP neural network based on genetic algorithm
InactiveCN109409568AImprove relevanceImprove forecast accuracyForecastingNeural learning methodsAlgorithmPredictive methods
A method for optimizing groundwater depth of BP neural network based on genetic algorithm includes collecting data, analyzing and screening independent variable by set pair, and taking samples corresponding to said target independent variable; the output result of BP neural network is obtained by setting BP neural network; setting initial parameters of genetic algorithm; individual selection operation: In the old population, the preset probability is used to select the individual to produce the next generation. The selection principle is as follows: selecting according to the fitness value ofthe individual from large to small; crossover: the generation of new individuals through the crossover of chromosomes; mutation: An individual selected from a population to mutate a segment of a chromosome to produce a new individual; the fitness is calculated and compared with the original population when the number of evolution reached the upper limit. The chromosome corresponding to the fitnessoptimal solution is the threshold value and weight value corresponding to BP neural network. The application of the embodiment of the invention can improve the accuracy of the groundwater burial depth.
Owner:ANHUI AGRICULTURAL UNIVERSITY
Small size lysimeter suitable for different groundwater depths
InactiveCN105158110AHigh measurement accuracyLow costWeighing by removing componentEvaporationData acquisition
The invention discloses a small size lysimeter suitable for different groundwater depths. The small size lysimeter comprises a measuring inner barrel, a measuring outer barrel, a weighing sensor, a data acquisition unit, a sensor support device, a lithium battery, a water supplying meter, a water supplying pipe, a fixed bolt, a positioning bolt, a handle of a barrelhead, a sealed barrelhead, and a water level control barrel of groundwater. The small size lysimeter has the advantages that the weighing sensor replaces a traditional electronic balance scale, the continuous working of an apparatus is possible, the soil evaporation and the plant evaporation in any period can be automatically monitored, and the measurement accuracy is high; a tipping-bucket rain gauge purchased by a businesslike approach is taken as the water supplying meter, the cost is low, the water supplying meter and a water level control barrel of the groundwater are integrated as a whole, the evapotranspiration research on different groundwater depths is realized, the convenience is provided for the field operation and the construction cost is greatly lowered; the structure is simple, the measurement accuracy is effectively improved due to the fact that a fixed apparatus is used for continuously monitoring data, and the outside interference is avoided, meanwhile the usage and the maintenance are convenient, and can be completed by an ordinary worker.
Owner:HOHAI UNIV
Narrow site deep foundation pit excavation supporting construction method
The invention relates to a narrow site deep foundation pit excavation supporting construction method, and belongs to the field of building construction. The construction method includes the following contents that the depth of a foundation pit is 12.1 m; the depth of underground water in a the foundation pit is 30 m; the depth of underground water outside the foundation pit is 30 m; and the coefficient for importance of a supporting structure is 1.0. The construction method comprises the steps that (1) a soil nailing and anchor spraying method is adopted for slope supporting of the foundation pit; (2) a support pile and anchor cable method is adopted for non-sloping space supporting of a forwarding station and a gallery; and (3) the support pile and anchor cable method is adopted for foundation pit supporting. According to the narrow site deep foundation pit excavation supporting construction method, it is guaranteed that surface water outside the foundation pit does not flow into the foundation pit, accumulated water inside the foundation pit and on a slope face is drained out of the foundation pit in time, and stagnantblocked water on a shallow layer of the side wall of the foundation pit can be smoothly drained out; and a retention wall is arranged on the periphery of the foundation pit, it is guaranteed that rainwater cannot wash the slope, and it is guaranteed that the accumulated water can be drained out in time.
Owner:CHINA CHEM ENG SECOND CONSTR
Method for rapidly increasing survival rate of artificially-restored poplar in arid desert area
InactiveCN102172191AIncrease chances of survivalIncrease growth rateRoot feedersForestryAridEvaporation
The invention relates to a method for rapidly increasing the survival rate of an artificially-restored poplar in an arid desert area. In the method, by means of soil suction, transpiration pulls and capillary actions of plants and the hydrotropism (a feedback mechanism of root system water induction) of the root system development of the poplar, the water evaporation waste is furthest reduced, vertical downward and horizontal development rates of a poplar root system are accelerated and the water and environment resource obtaining capacity of the artificially-restored poplar is also improved, therefore, the purpose of promoting the rapid survival of the artificially-restored poplar seedling in the arid desert area is achieved; therefore, the survival rate of the artificially-restored poplar is increased in the arid desert area with precipitation amount of less than 100 mm, evaporation capacity of more than 2000 mm and larger groundwater depth of 3-4 m, and adverse succession after artificial auxiliary measures are cancelled is avoided.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
Soil salinization critical groundwater depth calculation method
ActiveCN109061105ADefine the physical processThe mechanism of action is clearEarth material testingSoil typeSoil science
The invention relates to a soil salinization critical groundwater depth calculation method. The method comprises the steps that a soil type is determined; soil texture is determined; a soil capillaryequivalent pore diameter is calculated; a temperature range is determined; surface tension of water is determined; a salinization critical value is determined; and critical depth is calculated. According to the method, by analyzing the principle that salt is brought to the surface under the action of groundwater capillaries, the soil salinization process is elaborated, and the critical depth causing soil salinization is defined; and a calculation function of a key parameter, namely the soil equivalent pore diameter, in a rise height theoretical formula of capillary water is derived, the maximum rise height of the capillary water is used as a calculation objective, and a salinization model is constructed to determine the soil salinization groundwater critical depth. The method is clear in physical process and action mechanism, has universality for solving the soil salinization problem caused by excessively high groundwater and provides reliable theoretical and technical support for guiding reasonable development and utilization of groundwater resources and governance of soil salinization.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Quick method for relieving water deficit of plants in arid desert areas
ActiveCN102919048APromote germinationPromote the emergence of seedlingsWatering devicesCultivating equipmentsAridEvaporation
The invention relates to a quick method for relieving water deficit of plants in arid desert areas. According to the method, the stimulation effect of water supply on a soil seed bank, the range in which soil condensate appears easily, the influence of a canopy structure on condensed water and a condensing surface made of dense nylon screens are used, so that the formation of hydroscopic water in different ranges, atmospheric water vapor condensed water and soil water vapor condensed water is promoted, an effective water supply is provided for the germination and seedling emergence of the soil seed bank, the plants are helped to overcome drought, and then the aim of relieving the water deficit of the plants in the arid desert areas is fulfilled. By the method, the survival rate of annual plants in the arid desert areas in which the amount of precipitation is less than 150mm, the amount of evaporation is more than 2,000mm and the groundwater depth is large (3 to 4m) is improved, and the invalid dissipation of the condensed water is avoided.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
Composite medium PRB restoration method for chlorohydrocarbon contaminated groundwater
InactiveCN109179677AImprove reduction efficiencyRepair pollutionTreatment using aerobic processesWater contaminantsReaction layerComposite media
The invention relates to a composite medium PRB restoration method for chlorohydrocarbon contaminated groundwater. The method comprises the following steps: (1) investigating the depth, the flow rateand the flow of groundwater and the type, the concentration and the space distribution of contaminants in an area to be treated; (2) calculating the size of a groundwater contaminant plume, and defining a contaminated area according to the size of the contaminant plume; (3) excavating four parallel trenches at the downstream of the groundwater contaminant plume in a direction perpendicular to theflowing direction of the groundwater, wherein the four trenches are a gravel layer, a first reaction layer, a second reaction layer and an adsorption layer in the flowing direction of the groundwaterrespectively; (4) allowing the bottoms of the gravel layer, the first reaction layer, the second reaction layer and the adsorption layer to extend to a position below a water-containing layer of the treated area and a height from the water-containing layer to the top of each of the four layers to be more than the depth of the underwater; and (5) respectively arranging contaminant monitoring wellsat an upstream place, having a distance of 5 m to the gravel layer, of the gravel layer and a downstream place, having a distance of 2 m to the adsorption layer, of the adsorption layer.
Owner:湖南新九方科技有限公司
Artificial drainage and dewatering, cushion and low-energy replacement dynamic compaction shallow foundation strengthening method
ActiveCN106567379AEffective reinforcementImprove bearing capacitySoil preservationDynamic compactionPunching
The invention discloses an artificial drainage and dewatering, cushion and low-energy replacement dynamic compaction shallow foundation strengthening method. The method mainly comprises the construction steps that (1) surface cleaning and field leveling are carried out; (2) surveying and positioning are carried out; (3) artificial drainage and dewatering are carried out, wherein artificial vacuum well-point dewatering can be adopted; (4) a cushion, such as mountain skin stone or gravel, with the thickness ranging from 500 mm to 1000 mm is paved; (5) low-energy dynamic compaction replacement construction is carried out, wherein the manners of dynamic compaction replacement, two times of point compaction and one time of full compaction are adopted, a column hammer is firstly adopted for impact holing, layered filling and layered punching and enlarging compaction is adopted to form a replacement pillar body, and after a dynamic compaction replacement point is completed, the manners of two times of point compaction and one time of full compaction are adopted for conducting dynamic compaction until the process is completed; and (6) dynamic compaction monitoring and detecting are carried out. According to the artificial drainage and dewatering, cushion and low-energy replacement dynamic compaction shallow foundation strengthening method, the strengthening effect on shallow foundation soil is obvious, the constructing cost is low, and the practicability is high. The strengthening method is particularly suitable for shallow strengthening of large-area treatment zones with small groundwater depth and low shallow foundation soil bearing force and incapable of achieving safe walking of construction machines and engineering requiring the foundation bearing force not larger than 80 KPa.
Owner:中航蓝天工程技术有限公司
Ultra-small-bore deep-well water absorption device
InactiveCN102192159ALow costReduce difficultyPriming pumpNon-positive displacement fluid enginesEarth surfaceSubstance content
The invention relates to an ultra-small-bore deep-well water absorption device. Through the relay water absorption among water absorption pipes, underground deep water with the depth of more than 10 meters and the earth surface hole diameter of less than 100 millimeters can be absorbed directly, and the obtaining of underground water with an ideal temperature or mineral substance content at the depth of earth surface becomes possible for people. The device provided by the invention has the advantages of inventive thinking, reasonable structure and wide prospect, and is convenient to maintain.
Owner:张意立
Efficient production technology system for winter wheat in coastal salinization area
The invention belongs to the technical field of agricultural production, and particularly relates to an efficient winter wheat production technology system suitable for being applied in a coastal salinization area. Compared with winter wheat production in a sweet soil area, the system mainly has the innovation points of a technology of restraining salt through straw, a technology of applying nitrogen by stages and the like. Coastal farmland suitable for the technology system is mainly characterized in that the salt content of surface soil is smaller than 3.1 g / kg, and the groundwater depth is larger than 0.85 m. After application and popularization of the system, a significant effect is achieved.
Owner:BINZHOU UNIV
Method and device for dynamically predicting an ecological critical groundwater level in a mining area based on a single exponential model
ActiveCN109271675ARealization of dynamic estimationEasy to operateForecastingDesign optimisation/simulationVegetationSoil science
The invention relates to a method and a device for predicting an ecological critical groundwater level in a mining area based on a single exponential model. The method includes data collection step ofcollecting parameters needed for constructing soil hydrodynamic equation;an equation constructing step of constructing a soil hydrodynamic equation with vegetation water absorption by using the parameters; A curve fitting step of inversely obtaining actual and potential transpiration by using the soil hydrodynamic equation, and adopting a single exponential model to fit the relationship curves ofthe ratio of actual transpiration to potential transpiration and the groundwater table depth in different time periods; a water level estimation step of estimating a critical groundwater depth of vegetation in different months by using the relationship curve. The single index model introduced by the invention can accurately fit the relationship curve between Ta / Tp (ratio of actual transpiration to potential transpiration of vegetation) and groundwater depth, and the estimation result is more accurate.
Owner:XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
Method for evaluating groundwater pollution risk of reclaimed water irrigation
InactiveCN109064054AAvoid pollutionImage analysisGeneral water supply conservationWater sourceWater quality
The invention discloses a reclaimed water irrigation groundwater pollution risk assessment method, comprising the following steps: (1) acquiring water quality data Z and water level data L through monitoring points; (2) obtaining the infrared spectrum of the water source to be evaluated by a remote sensing infrared spectrum camera, and performing Fourier transform on the infrared spectrum to obtain the absorbance A; (3) loading geographic data through a three-dimensional engine, wherein the geographic data comprises a number C of factories, an elevation data E and a crowd amount P of an area to be evaluated; (4) taking the data collected in the steps (1), (2) and (3) into the pollution risk assessment model for risk assessment grade F; As that detection data of the monitor point and the absorbance obtained by the infrared spectrum are combine with the depth of the groundwater to calculate the grade of the pollution source, the probability of the groundwater being polluted can be obtain, and the groundwater is periodically detected at the place where the pollution source is high, the groundwater is prevented from being polluted and renovated, and the groundwater is prevented in advance.
Owner:国诚集团有限公司
Groundwater-based depth measurement method
ActiveCN110631654AReduce the impactReal-time monitoring of water level changesElectromagnetic wave reradiationLevel indicators by pressure measurementReal-time dataWater level
The invention discloses a groundwater-based depth measurement method, and belongs to the field of groundwater measurement. The groundwater-based depth measurement method uses a water level measuring device and cooperates with steps of the groundwater depth measurement method for operation. When the water level on the ground is between two safety lines, the water level measuring device can measureand record the distance between the ground surface and the ground. When the water level on the ground is at the lower end of the first safety line, the actual depth of the ground and the depth from the diving layer can be obtained in real time under the cooperation of the water level measuring device and an unmanned submersible, so that the depth data of the ground can be measured and recorded. Atthe same time, the abnormal water level detected can be subjected to real-time data feedback and corresponding emergency measures can be taken by the connection between related system to reduce the impact on the society and economy caused by abnormal changes in water levels on the ground and inaccurate measurement of water levels.
Owner:刘福东 +1
Underwater pollution source evaluation method
The invention discloses an underwater pollution source evaluation method. The method comprises the following steps: firstly acquiring image data of to-be-evaluated underwater through an unmanned detector with an infrared spectrum camera, loading geographic data through a three-dimensional engine; and computing the pollution source level F by importing the underwater depth L, the image data and thegeographic data into a level computation model. The absorbency of the underwater is acquired by loading the infrared spectrum camera on an unmanned aerial vehicle, the pollution source level is computed by loading the geographic data through the three-dimensional engine and combining the underwater depth, and then the probability that the underwater is polluted can be obtained, the periodic detection can be performed on the place with high pollution source, thereby preventing the underwater from being managed after being polluted, and the prevention in advance is made.
Owner:国诚集团有限公司
A portable groundwater depth-fixed sampling device, sampling system and sampling method
ActiveCN111257055BAccurate collectionAvoid dilutionWithdrawing sample devicesWastewaterSample dilution
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
Groundwater depth-fixed sampling probe, sampling system and sampling method using the probe
ActiveCN108956211BHigh resolutionHigh process feasibilityWithdrawing sample devicesTesting waterSoil sciencePipe
The invention discloses a groundwater depth-fixed sampling probe, a sampling system and a sampling method using the probe. The groundwater depth-fixed sampling probe comprises: a quick-connect joint; The joint is arranged at the opening; the bottom threaded cap; the inner liner, the inner liner is arranged between the top threaded cap and the bottom threaded cap, and the inner liner is provided with a plurality of holes; and the outer sleeve, The outer casing is set between the top threaded cap and the bottom threaded cap, the outer casing is set outside the inner liner, and a plurality of holes are arranged on the outer casing; wherein, the top threaded cap and the bottom threaded cap It is connected with the outer sleeve through the inner liner, and the diameter of the multiple holes on the outer sleeve is smaller than the diameter of the multiple holes on the inner liner; among them, the quick-connect joint, the top threaded cap, the bottom thread The plug cap, inner liner, and outer sleeve are made of stainless steel.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
Zoning optimization method of crop irrigation system in shallow groundwater buried area
ActiveCN110288169BImprove production efficiencyImprove water useForecastingResourcesSoil scienceWater production
The invention discloses a partition optimization method for crop irrigation systems in shallow groundwater buried areas. It includes: obtaining local historical data; using the Aquacrop model based on local historical data to obtain the first simulated yield and simulated water consumption at each growth stage of crops and wheat under different irrigation systems in different regions, and the set groundwater depth is used as the divisional boundary in different regions ;According to all the first simulated yields and the corresponding simulated water consumption in each growth stage, the second simulated yield and the stage sensitivity coefficients of different growth stages of all regional crops under each water production function model are obtained by using the set multiple water production function models or index; calculate the coefficient of determination between the first simulated yield and the second simulated yield; use the stage sensitivity coefficient or index and the determination coefficient to determine the best water production function model corresponding to each region; put the stage under the best water production function model The sensitivity coefficient or index is used as the irrigation decision-making variable, and combined with setting the irrigation quota, the irrigation system is obtained by using Aquacrop.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Quick method for relieving water deficit of plants in arid desert areas
ActiveCN102919048BPromote germinationEasy to unearthWatering devicesCultivating equipmentsAridEvaporation
The invention relates to a quick method for relieving water deficit of plants in arid desert areas. According to the method, the stimulation effect of water supply on a soil seed bank, the range in which soil condensate appears easily, the influence of a canopy structure on condensed water and a condensing surface made of dense nylon screens are used, so that the formation of hydroscopic water in different ranges, atmospheric water vapor condensed water and soil water vapor condensed water is promoted, an effective water supply is provided for the germination and seedling emergence of the soil seed bank, the plants are helped to overcome drought, and then the aim of relieving the water deficit of the plants in the arid desert areas is fulfilled. By the method, the survival rate of annual plants in the arid desert areas in which the amount of precipitation is less than 150mm, the amount of evaporation is more than 2,000mm and the groundwater depth is large (3 to 4m) is improved, and the invalid dissipation of the condensed water is avoided.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
Underground water nitrate treatment system and construction method thereof
PendingCN109485123ABuried depthWater contaminantsWater/sewage treatment by sorptionGroundwater nitrateSites treatment
The invention discloses an underground water nitrate treatment system and a construction method thereof. The underground water nitrate treatment system comprises an underground on-site treatment system and an earth surface secondary parallel treatment system. The underground on-site treatment system comprises a water supply well and a clay pile and a PRB material pile arranged around the water supply well. The earth surface secondary parallel treatment system comprises a water inlet pipe and a drainage pipe and a filter element module communicating the water inlet pipe and the drainage pipe. The filter element module is arranged in parallel. The water inlet pipe is connected to the water supply well. The underground water nitrate treatment system is suitable for a large area underground water nitrate polluted area and the groundwater depth is relatively shallow. Pre-treatment of a centralized or diffused water supply water source land is needed. After pre-treatment by the system, concentrations of nitrate, nitrite and ammonia and nitrogen in the underground water reach the type III standard of underground water quality.
Owner:WATER RESOURCES RES INST OF SHANDONG PROVINCE
A calculation method of soil profile water utilization based on profile moisture content and groundwater depth
The invention discloses a soil profile water utilization calculation method based on profile water content and groundwater burial depth. The main steps are as follows: data preparation and inspection; Calculate the moisture content of the profile; select the calculation area to calculate the soil profile water storage; finally use the difference between the soil profile water storage at the beginning and the end of the calculation period to obtain the soil profile water utilization; at the same time, use the water storage change in the groundwater depth variation zone to calculate The groundwater utilization in the saturated zone is obtained, and the soil water utilization in the unsaturated zone is further reversed to obtain the vertical distribution of water utilization in the soil profile. The invention uses the measured water content data and extends it to the entire calculation section, and calculates the groundwater utilization in the saturated zone and the soil water utilization in the unsaturated zone by segmenting the calculation area, which is the source of distinguishing the water utilization in the soil profile. Data support is provided.
Owner:WUHAN UNIV
A groundwater level dynamic simulation experiment method based on the groundwater dynamic simulation experiment platform
InactiveCN104596737BRealize simulation reproductionImprove fidelityHydrodynamic testingEarth material testingExperimental researchIn situ bioremediation
The invention relates to a groundwater level dynamic simulation experiment method based on a groundwater dynamic simulation experiment platform. Specifically, the groundwater dynamic simulation experiment platform is first set up, and then an aquifer that simulates a typical hydrogeological unit is loaded into the groundwater dynamic simulation experiment platform. medium, and finally conduct a groundwater level dynamic simulation experiment on the groundwater dynamic simulation experiment platform. The invention improves the fidelity of the simulation experiment, reduces the cost of the simulation experiment, and provides groundwater in-situ aeration technology, in-situ chemical oxidation technology, in-situ bioremediation technology, permeable reaction wall technology, and soil in-situ leaching technology. The research experiment of restoration technology such as washing restoration technology provides a reliable experimental basis and expands the universality of the simulation device.
Owner:INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
Air Control Groundwater Depth Sampler
ActiveCN112945645BSimple processRealize self-locking functionWithdrawing sample devicesAir pumpEnvironmental engineering
The invention discloses an air-controlled groundwater depth-fixed sampler, which relates to the field of groundwater sampling and includes a mounting platform, a servo motor, an air pump, and a sampling mechanism. Both the servo motor and the air pump are fixedly installed on the top side wall of the mounting platform. The top side wall of the installation platform is fixedly provided with a bracket, the side wall of the bracket is rotatably connected with a reel, the side wall of the reel is wound with a sling, and the end of the sling is fixedly connected with the sampling mechanism, The sampling mechanism is lowered to the required depth through the sling, and the air pump is controlled to inflate and deflate the two sampling tubes on the side wall of the lower end of the mounting seat successively, so that the inside of the two sampling tubes can be filled with water successively, and then in a certain After the first water sampling is completed, the sampling mechanism can be retracted to the second depth to carry out the second water sampling work, so as to realize the function of multi-layer sampling by setting out the line at one time, without the need to monitor the sampling mechanism multiple times. Take it back in the well, and put it down again, which simplifies the process and is more convenient.
Owner:青海九零六工程勘察设计院有限责任公司 +1
Method for rapidly increasing survival rate of artificially-restored poplar in arid desert area
InactiveCN102172191BIncrease chances of survivalIncrease growth rateRoot feedersForestryAridEvaporation
The invention relates to a method for rapidly increasing the survival rate of an artificially-restored poplar in an arid desert area. In the method, by means of soil suction, transpiration pulls and capillary actions of plants and the hydrotropism (a feedback mechanism of root system water induction) of the root system development of the poplar, the water evaporation waste is furthest reduced, vertical downward and horizontal development rates of a poplar root system are accelerated and the water and environment resource obtaining capacity of the artificially-restored poplar is also improved,therefore, the purpose of promoting the rapid survival of the artificially-restored poplar seedling in the arid desert area is achieved; therefore, the survival rate of the artificially-restored poplar is increased in the arid desert area with precipitation amount of less than 100 mm, evaporation capacity of more than 2000 mm and larger groundwater depth of 3-4 m, and adverse succession after artificial auxiliary measures are cancelled is avoided.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
Regional phreatic water evaporation capacity measurement method and device based on digital elevation model
InactiveCN106845091AImprove accuracyEasy accessInformaticsSpecial data processing applicationsGeomorphologyEvaporation
The invention relates to a regional phreatic water evaporation capacity measurement method and device based on a digital elevation model. The method comprises the steps that ground absolute elevation values of all grids in a to-be-measured region are acquired according to the digital elevation model (DEM) of the to-be-measured region; the groundwater depths of the grids corresponding to different ground absolute elevation values are determined according to the ground absolute elevation values of all the grids; the phreatic water evaporation capacities of the grids corresponding to the different ground absolute elevation values are determined according to the groundwater depths; the phreatic water evaporation capacity of the whole region is determined according to the number of the grids corresponding to the different ground absolute elevation values in the to-be-measured region and the phreatic water evaporation capacities of the grids corresponding to the different ground absolute elevation values. According to the technical scheme, the measurement result is high in accuracy, little data is needed, data acquisition is easy, the implementation steps are simple and clear, and manpower and material resources of site investigation can be greatly saved.
Owner:XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
A Groundwater Depth Sampler
ActiveCN108680399BWide range of sampling depthsVarious sampling methodsWithdrawing sample devicesEnvironmental engineeringMechanical engineering
The invention discloses a sampler for underground water at a fixed depth. The sampler sequentially comprises at least two connecting pipes, a sampling base pipe and a one-way water stop device from top to bottom, wherein the sampling base pipe and the connecting pipes are detachably fixed to form an interpenetrating sampling cavity; the sampling base pipe is communicated with the one-way water stop device through a sleeve type telescopic joint; the one-way water stop device comprises a funnel and a funnel bushing; the upper end of the telescopic joint and the lower end of the sampling base pipe are hermetically fixed; the lower end of the telescopic joint is in threaded connection with the funnel bushing; the funnel is arranged in the space formed by the funnel bushing and the telescopic joint; the lower part of the funnel extends out of the funnel bushing, and the upper end part of the funnel is clamped with the interior of the funnel bushing; and the funnel is tightly sealed with thelower edge of the funnel bushing. During sampling, the funnel moves upward by virtue of the thrust force of water, and the funnel is separated from the lower edge of the funnel bushing to form a water inlet channel; and when the sampling is finished, the sampler is lifted, and the funnel moves downward and is tightly sealed with the funnel bushing to reach a water stop state. The sampler is simple in structure, diverse in sampling mode, convenient to carry, easy to operate, high in controllability and capable of sampling water at the fixed depth.
Owner:广州市璞境生态保护技术有限公司
A Calculation Method for Critical Groundwater Depth of Soil Salinization
ActiveCN109061105BThe mechanism of action is clearVersatilityEarth material testingSoil typeSoil science
The invention relates to a soil salinization critical groundwater depth calculation method. The method comprises the steps that a soil type is determined; soil texture is determined; a soil capillaryequivalent pore diameter is calculated; a temperature range is determined; surface tension of water is determined; a salinization critical value is determined; and critical depth is calculated. According to the method, by analyzing the principle that salt is brought to the surface under the action of groundwater capillaries, the soil salinization process is elaborated, and the critical depth causing soil salinization is defined; and a calculation function of a key parameter, namely the soil equivalent pore diameter, in a rise height theoretical formula of capillary water is derived, the maximum rise height of the capillary water is used as a calculation objective, and a salinization model is constructed to determine the soil salinization groundwater critical depth. The method is clear in physical process and action mechanism, has universality for solving the soil salinization problem caused by excessively high groundwater and provides reliable theoretical and technical support for guiding reasonable development and utilization of groundwater resources and governance of soil salinization.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Shallow foundation reinforcement method of artificial drainage, cushion, low-energy displacement dynamic compaction
ActiveCN106567379BEffective reinforcementImprove bearing capacitySoil preservationDynamic compactionPunching
Owner:中航蓝天工程技术有限公司
A Method for Estimating the Reasonable Burial Depth of Groundwater in Artificial Forest
ActiveCN102930162BAchieve sustainable managementSpecial data processing applicationsForest industrySustainable management
The invention discloses a method for estimating ground water reasonable buried depth of a planted forest and belongs to the technical field of intersection of the forestry ecological project technology and the environmental monitoring technology. The method includes the following steps: determining a plurality of ground water sampling points in small areas representing different landforms, soils, plants and growth condition backgrounds of planted forest areas in the different areas of the planted forest, measuring actual ground water buried depth of the ground water sampling points, collecting plant types and growth condition grade of the plants that the ground water sampling points correspond to, acquiring a group of ground water reasonable buried depth ensuring normal growth of the plants under the ground of specified sample areas according to the collected information and further estimating the ground water reasonable buried depth of the planted forest. The method provides a new model and a new way for quantified checking of the ground water buried depth under the background of planted forest and provides reasonable effective accordance for sustainable management of the planted forest.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
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