553 results about "Natural water" patented technology

The invention discloses a method for evaluating the influence of reservoir-water transfer project combined regulation on downstream ecological flow. The method comprises the following steps: step 1, collecting data of a research area; 2, constructing a water transfer project water source area natural water circulation model WEP-NHA; step 3, constructing a natural-social binary water circulation coupling model WEP-HA; 4, simulating the runoff of the water source area by using a WEP-HA model; 5, the system analyzes the change degree of the key control section water quantity and the ecological flow guarantee rate of the water source area under the condition that the reservoir and the water transfer project are overlapped. According to the method, system simulation of disturbance response of a complex system in a water source area can be achieved, the comprehensive influence of a complex water conservancy project system on water resources and the ecological environment is effectively revealed, high adaptability and predictability are achieved, the problem of regulation and storage effect simulation of a reservoir without data or with little data is effectively solved, and the method is suitable for popularization and application. And decision support is provided for scientifically formulating the water transfer scale and guaranteeing the ecological flow.

The invention provides a method for detecting the concentration of phosphite ions in a natural water medium, which comprises the following steps: detecting a to-be-detected sample solution containing phosphite ions and impurity ions by using an ion chromatograph to obtain a chromatogram of the to-be-detected sample; determining a peak area value of phosphite ions from the chromatogram of the sample to be detected; obtaining the concentration of the phosphite ions in the sample to be detected according to a linear regression equation of the peak area value of the phosphite ions and the concentration of the phosphite ions; wherein the test conditions of the ion chromatograph are as follows: an anion exchange column is selected as a chromatographic column, and the column temperature is 43-56 DEG C; the leacheate is a potassium hydroxide solution, the flow rate is 1.0-2.0 mL / min, gradient leaching is adopted, and the concentration of the leacheate is 15-18 mM within the time period of 0-14 min; the concentration of the leacheate is 33-36 mM within the time period of 16-30 min; the concentration of the leacheate is 17 to 20 mM within the time period of 32 to 36 minutes.

The invention relates to the technical field of roe breeding, in particular to a salmon roe breeding and hatching integrated device and method.The device comprises a hatching pond, and a partition plate is arranged in the center of the hatching pond and divides the hatching pond into a hatching cavity and a breeding cavity; an overflow pipe capable of sliding is arranged on the partition plate; a filter assembly is arranged in the breeding cavity and comprises a mounting frame and a filter screen; through linkage of the overflow pipe and the filter screen, automatic regulation and control of water quality purification and fry protection in the salmon egg hatching process are achieved. The self-adaptive angle adjustment of the filter screen along with lifting of the overflow pipe is matched with the clearance channel, efficient separation of fry and impurities is achieved, the survival rate of the fry is guaranteed, the hatching environment is kept clean through concentrated fishing of the impurities, hatching conditions simulating the natural water flow period are provided for salmon demersal eggs, egg adhesion is reduced, the hatching efficiency is improved, and the survival rate of the salmon is increased. And the excellent breeding target of the salmon fries is achieved.

A fungus having manganese oxidation capacity is provided. The fungus can oxidize Mn2+ in a water body into a water-insoluble manganese oxide; and the Mn2+ oxidizing fungus is Cladosporium sp. XM01 strain with the accession number of CGMCC NO. 21083. The Cladosporium sp. XM01 strain is used to oxidize Mn2+ in a natural water body, and has stable operation within a range of room temperature (15-30° C.) and a range of neutral pH (6.0-7.5) and high Mn2+ oxidation efficiency; moreover, the XM01 strain may oxidize Mn2+ cyclically, thereby achieving the in-situ remediation of water bodies or soils polluted by heavy metals or trace organic substances. The manganese oxides generated through oxidization in the growth process of the strain have a good application potential in sewage treatment, water environment restoration, soils and other fields.

The invention discloses a self-adaptive floating type aeration device for natural water aeration, and particularly relates to the technical field of water quality treatment.The water to be aerated firstly enters from an outer filter screen and then enters a supporting seat through four inner filter screens, and due to the fact that the pore diameter of the inner filter screens is smaller than that of the outer filter screen, the filtering grade is higher, and the aeration effect is better. Meanwhile, the submersible electric pump synchronously drives the eccentric wheel to rotate, that is, when the eccentric wheel rotates by a circle, the eccentric wheel is in contact with the adjacent sliding plates in sequence, the sliding plates directionally slide along the inner cavity of the supporting seat at the moment, and the folding part is in an extended (opened) state at the moment; the sliding plate drives the ejector pins on the outer sides of the vertical rods to face the outer filter screen, impurities attached to the outer filter screen are pushed out through the ejector pins, the overall collaboration with the secondary sewage interception assembly is higher, the water inlet effect affected by the impurities is avoided, the enough water inlet amount is guaranteed, and the aeration efficiency of the device is improved.

The invention discloses an ecological risk assessment method for organic pollutants in a natural water body, and belongs to the field of ecological risk assessment of the natural water body, and the method comprises the steps: building a quantitative structure-activity relationship toxicity prediction model of species based on a machine learning and feature screening method; predicting and obtaining biotoxicity data in a to-be-predicted water body by using the quantitative structure-activity relationship model, establishing a species sensitivity distribution model of pollutants in the water body according to the biotoxicity data, and calculating predicted non-effect concentration; on the basis of database retrieval, acute toxicity experiments and an inter-species relationship prediction model, collecting, predicting and supplementing toxicity data of species in the water body, and evaluating the harmfulness of pollutants in the water body by using a risk entropy method and a comprehensive scoring method respectively. According to the method, ecological risk assessment is carried out by utilizing a machine learning method, the toxicity of the persistent organic pollutants in seawater and fresh water can be effectively assessed, and the ecological risk of the organic pollutants in the water body can be effectively assessed.

The invention discloses a composite bio-based suspension purification system based on a near-natural water ecology concept, and belongs to the technical field of water ecology diversity restoration. The system is composed of an emergent aquatic plant ecological design module, a bio-based suspension core, a microorganism cultivation bed, an intelligent underwater oxygenation and aeration module, an artificial ecological fish reef and a submerged plant planting module. Wherein the bio-based suspension core is of a four-layer gradient composite structure and comprises a polyester fiber filler layer, an active carbon fiber sponge layer and a palm fiber bio-base layer, and synergistic purification of physical adsorption, chemical degradation and biological metabolism is achieved. The intelligent aeration module dynamically regulates and controls the aeration intensity through multi-parameter sensor linkage and a fuzzy PID algorithm, and the oxygen transfer efficiency is larger than or equal to 35%. According to the invention, through coupling design of aperture gradient distribution (80-92% porosity) of the four-layer gradient bio-based suspension core and a dynamic response threshold value of a fuzzy PID algorithm, collaborative optimization of carrier structure parameters and control system parameters is realized for the first time. The innovative technology not only improves the stability and diversity of an ecological system, but also strengthens the natural purification capacity of a water body, and provides a new thought for water environment protection.

The utility model discloses a fire-fighting natural water source intake water level monitor, which relates to the technical field of water level monitoring and comprises a tripod device and an aluminum alloy box staff, a telescopic pull box is fixedly mounted at the top end of the aluminum alloy box staff, and a steel wire rope is fixedly connected between the telescopic pull box and a support plate. The steel wire rope is movably sleeved with a noctilucent floating ball; both the tripod device and the aluminum alloy box staff can be adjusted within a certain range according to the liquid level height of a natural water area, the liquid level height information can be conveniently collected through the arranged noctilucent floating ball, the liquid level height information can be conveniently used at night through the arranged spotlight, and the tripod device can be folded and is convenient to carry. The portability is further improved through the arranged straps, a water source can be found conveniently, whether the selected water source meets the water taking condition or not can be reported to a commander, and in addition, barbs are additionally arranged on the side face of a fixing base of the tripod device and can be inserted into sludge to improve the stability of the tripod device.

The utility model discloses an eDNA solid state passive sampler suitable for natural water, and relates to the eDNA sampler field, the eDNA solid state passive sampler comprises a lure pole, a lure wheel and a main line, the lure wheel is fixedly arranged on a wheel seat of the lure pole, one end of the main line is wound on a line cup of the lure wheel, the other end of the main line passes through a line guide ring arranged on the lure pole, and the line guide ring is arranged on the lure pole. The device further comprises a buoy, a buoy fixing hook, a slidable buoy seat, a stainless steel nesting device and an adsorption material filter membrane. According to the solid passive sampler suitable for the eDNA in the natural water body, the design that a stainless steel nesting device and a lure rod are combined is adopted, so that the sampling process is simple and rapid, complex equipment is not needed, and rapid deployment and recovery in a field environment are facilitated; the sampler can be kept stable under different water flow conditions, the problem that the sampler is lost along with water or washed away is effectively prevented, and the sampling efficiency and the success rate are greatly improved.

The invention discloses a regional water balance health evaluation method and device based on binary water circulation. The method comprises the following steps: acquiring a natural water circulation key element data set, a social water intake key flux data set and a key evaluation index data set of each subsystem in a historical period in a target area; then carrying out pretreatment; constructing a natural water circulation health evaluation model, and inputting natural water circulation key elements to obtain a first evaluation value; constructing a social water circulation health evaluation model, and inputting social water circulation key elements to obtain a second evaluation value; constructing a cooperation system coordination degree evaluation model, and inputting key evaluation indexes of a social economic system, an ecological environment system and a water resource system to obtain a third evaluation value; and constructing a comprehensive water balance health evaluation model, inputting the obtained first evaluation value, the second evaluation value and the third evaluation value into the comprehensive water balance health evaluation model to obtain a comprehensive evaluation value, and performing evaluation analysis on the regional comprehensive water balance health state through the comprehensive evaluation value.

The invention provides a method and a device for efficiently proliferating sepiella maindroni by combining grazing and raising, and belongs to the field of aquatic animal proliferation. An efficient breeding method for sepiella maindroni integrating grazing and breeding comprises the following steps that an appropriate sea area is selected, fertilized eggs are bred in a breeding facility laid in the downstream direction of a normal fish breeding net cage, namely an empty net cage containing an artificial floating reef, the periphery of the empty net cage is provided with an algae-mussel flow blocking ecological rope, and a cover net is arranged above the empty net cage; the newly hatched cuttlefish can stay in the proliferation facility empty net cage for a long time due to the characteristics of loving reefs and drilling the net and strong space awareness, and slowly escape into natural water after gradually adapting to the proliferation environment. According to the proliferation method, cuttlefishes gradually adapt to the natural environment of the sea area, meanwhile, cuttlefish larvae are well protected enough in the fragile incubation initial stage through protection measures such as net cages, and therefore the proliferation survival rate and the maintenance efficiency are improved, and efficient proliferation is achieved.

The invention relates to the technical field of soil physical parameter in-situ measurement, and discloses a soil layer natural water content portable intelligent measuring instrument based on multi-source sensing fusion, which comprises a composite probe assembly and an intelligent measurement and control host which are physically connected, the composite probe assembly is configured to be inserted into a soil layer to be tested to construct a multi-physical field test environment, and an electrical transceiving unit and an acoustic transceiving unit are integrated in the composite probe assembly. By constructing a cross physical field excitation and multiphase parameter collaborative decoupling mechanism, a multidimensional dynamic correlation model is established by using the thermosensitive drift characteristic of the sound velocity of a mixed medium during thermal disturbance and the transient step response of a dielectric constant under an acoustic radiation force field; the problems that the coupling influence of the water content and the volume weight cannot be distinguished and the conductivity of bound water and the conductivity of free water are difficult to separate in a traditional means are effectively solved, and four independent physical quantities including the volumetric water content, the in-situ dry volume weight, the bound water content and the actual conductivity of pore water are synchronously inverted through a single probe. And the decoupling precision of the equipment on complex multi-phase soil medium parameters is improved.

The invention relates to the technical field of organic pollutant removal application, and particularly discloses a preparation method and application of a Co and N loaded Ti3Al C2 composite catalyst, and the preparation method comprises the step of successfully doping N and Co into the surface of Ti3Al C2 to synthesize a Co-N-Ti3Al C2 composite material by adopting a simple hydrothermal combined high-temperature carbonization method. Compared with a double combination of the materials, the Co-N-Ti3Al C2 has higher PMS activation and sulfonamide isoxazole (S IZ) degradation capability, and 98.6% of S IZ simulation wastewater with the concentration of 10 mg / L can be removed within 30 minutes by combining the Co-N-Ti3Al C2 with a PMS system. The high catalytic activity of the material is attributed to the strong interaction between pyridine N and Co atoms on the surface of Ti3AlC2, and meanwhile, the strong interaction is also beneficial for inhibiting leaching of Co ions in the material. The Co-N-Ti3Al C2 composite material has the advantages that the Co-N-Ti3Al C2 composite material is high in interference resistance, high in activity in natural water and high in practical applicability.

Provided herein are processes and systems related to a carbon dioxide sequestration process comprising a) calcining limestone using fossil fuel instead of an input to form a mixture comprising lime and a gas stream comprising greater than about 30 vol% carbon dioxide; and b) treating the mixture comprising lime with the atmosphere and allowing carbon dioxide from the atmosphere to react with the mixture and form a composition comprising calcium carbonate, calcium bicarbonate, or a combination thereof. Also provided herein are processes and systems related to a carbon dioxide sequestration process comprising a) calcining limestone using fossil fuel instead of an input to form a mixture comprising lime and a gas stream comprising greater than about 30 vol% carbon dioxide; and b) treating the mixture comprising lime with natural water and allowing carbon dioxide dissolved in the natural water to react with the mixture to form a composition comprising calcium carbonate, calcium bicarbonate, or a combination thereof.

The present invention relates to the technical field of fish reproduction and release facilities, and specifically to an ecologically simulated fish fry wilding training fishway and a wilding training method. A water reservoir, a water supply unit, a return water unit, a fishway body, and an inlet fishway; the water supply unit is used to supply water from the water body to the water reservoir; one end of the fishway body is connected to the water reservoir through a water discharge valve, and the other end of the fishway body is connected to the water body through an inlet fishway; a water retaining gate is provided on the inlet fishway; a first resting pool, a second resting pool, and a third resting pool are provided in the fishway body; a number of stone steps are provided on the fishway body; and at least two water retaining steps are also provided. In response to the technical problem of low survival rate of released fry, the present invention is more in line with the characteristics of the wild habitat of released fish, and can train the fry's ability to adapt to natural water bodies by adjusting the flow rate and flow rate in the fishway body, meet the needs of fish wilding training, and also meet the needs of zoned breeding in the fishway body at the same time.

The invention belongs to the technical field of biological agents and sewage treatment, and particularly relates to application of priesta aryabhattai ZZRQ1 (Priesta aryabhattai) ZZRQ1 and zeolite modified by the priesta aryabhattai ZZRQ1 in nitrogen-containing sewage treatment. According to the present invention, the P.adami ZZRQ1 has efficient heterotrophic nitrification performance, and can effectively remove NH4 < + >-N in the natural water body; the modified zeolite is used as a microbial carrier, the specific surface area of the zeolite can be increased through modification, the number of functional groups on the surface of the carrier is increased, the ammonia nitrogen removal capacity of the carrier is improved, more attachment interfaces are provided for microorganisms, and the adsorption performance of the modified zeolite is combined with the degradation performance of the Prussella aryabhattai ZZRQ1, so that the degradation performance of the Prussella aryabhattai ZZRQ1 is improved. Compared with unmodified zeolite, the modified zeolite has better capability of removing ammonia nitrogen in sewage.

The utility model relates to the field of freshwater snail capturing, in particular to a pomacea canaliculata trapping device. The device comprises a water-permeable basket body with a top cover, and one or more side walls of the basket body are provided with oval funnel channels or round funnel channels. According to the device, LED lamp luring commonly used in previous food luring tests is changed, holes are formed in the side face of the basket body, natural water flow is utilized to enable smell of luring food to be transmitted to water, and the ampullaria gigas is luring into the basket body; height differences exist between the elliptical holes and the round holes and the bottom of the basket body, so that the pomacea canaliculata cannot escape; the pomacea canaliculata gathered through food attraction can be conveniently treated in a centralized manner; according to the device, the attractant can be taken out and added at any time in the test process, the problem that the attractant effect in the later test period is reduced due to degradation of the attractant is solved, the device is simple in manufacturing method, materials are easy to obtain, cost is low, pesticide use is avoided, and the device is economical, practical and environmentally friendly.

The invention provides a device and a method for improving transparency of a natural water body by utilizing a microalgae biological membrane, and belongs to the field of water treatment, and the device comprises a water tank, rollers, a microalgae attachment matrix, a water distribution device and a lighting device. The transparency of the natural water body is effectively improved through the microalgae biological membrane. The microalgae biological membrane secretes macromolecular extracellular polymeric substances, can adsorb suspended particulate matters and soluble organic matters in water, and inhibits the reproduction of other planktons through nutrition competition, so that the turbidity is reduced. In addition, the device is designed as up-flow water inlet, so that the contact between the water body and the microalgae biological membrane is enhanced, and the treatment effect is improved. LED lamps and a heating device are adopted to keep a proper growth environment, and meanwhile, a photovoltaic power generation system is arranged, so that green and environment-friendly effects are achieved. The method is simple and easy to implement, low in cost and convenient to manage and maintain, and a novel and effective technical scheme is provided for improving the transparency of the natural water body.

The invention provides a cascade water-light complementary scheduling method for a water-light load multi-uncertainty distribution network system. The method belongs to the field of power system dispatching optimization. A cascade hydropower station power generation model, a photovoltaic power generation model and a distribution network system model are combined to establish a cascade water-light complementary power generation joint optimization scheduling model; converting the cascade water-light complementary power generation joint optimization scheduling model into a two-stage robust optimization model, and performing linearization processing; decomposing the two-stage robust optimization model into a main problem and a sub-problem; loosening the decomposed sub-problem and constructing a new objective function to obtain an infeasible test sub-problem; and iteratively solving the main problem, the sub-problems and the infeasible test sub-problems to obtain a day-ahead scheduling plan. According to the method, multiple uncertainties of natural incoming water and photovoltaic output of the small hydropower station are considered, the power generation flexibility of the cascade hydropower station is excavated to improve the photovoltaic absorption capacity, and efficient solution of the model is realized by providing a linearization method of the hydropower model and a sub-problem feasibility test method.

The utility model discloses a micro-power nitrogen removal tank. The micro-power nitrogen removal tank comprises a first chamber, a second chamber, a fluid discharge channel and a gas supply unit, wherein the first chamber is used for reducing oxygen content; the second chamber is used for removing nitrogen; the first chamber is provided with a water inlet, the upper part of the first chamber is communicated with the upper part of the second chamber, and the lower part of the second chamber is communicated with the lower part of the fluid discharge channel; the gas supply unit is communicated with the lower part of the fluid discharge channel and is used for introducing gas into the fluid discharge channel; during application, aerobic bacteria can be added into the first chamber, and anaerobic bacteria can be added into the second chamber; sinking the micro-power nitrogen removal tank added with the strain into a sewage water body; the micro-power nitrogen removal tank disclosed by the utility model can realize flowing of an internal water body only under the action of airflow, is extremely low in energy consumption, and can assist in realizing removal of total nitrogen under the condition that the ecology of a natural water body is not changed.

The utility model discloses a cooling water waste heat recovery system for cultivation, and relates to the technical field of cooling water waste heat recovery, the cooling water waste heat recovery system for cultivation comprises a temperature adjusting device and a first pipeline, the temperature adjusting device is provided with a first water flow channel, an outlet of the first water flow channel is used for being communicated with a cultivation pool, and the first pipeline is provided with a second water flow channel. The temperature adjusting device is used for heating water flowing into the first water flow channel, an inlet of the first pipeline is used for being communicated with a circulating cooling water outlet of a thermal power plant, and an outlet of the first pipeline is selectively communicated with the inlet of the first water flow channel and one of the breeding ponds. According to the cooling water waste heat recovery system for breeding, the waste heat of the circulating cooling water is used for fishery breeding, recycling of the waste heat of the circulating cooling water can be achieved, energy is saved, huge economic benefits can be generated, meanwhile, a natural water area can be prevented from being affected by heat pollution, and the environment is protected.

The invention discloses a method and a system for co-processing rain sewage wastewater in the non-ferrous metal resource recycling industry, the rain sewage wastewater comprises rainwater, general production wastewater, acidic wastewater and acidic wastewater, and the method comprises the following steps: carrying out coagulating sedimentation, filtration and low-pressure reverse osmosis desalination treatment on the rainwater and the general production wastewater; concentrated water of reverse osmosis is used as a liquid preparation of lime milk of waste acid wastewater and acidic wastewater; the method comprises the following steps: carrying out vulcanization reaction on waste acid wastewater and acid wastewater, carrying out neutralization treatment with lime milk, softening, filtering, resin softening, reverse osmosis and evaporative crystallization treatment, taking evaporated steam condensate as reuse water, and carrying out resource utilization on salt obtained by evaporative crystallization. According to the invention, zero discharge of wastewater generated in the non-ferrous metal recovery process can be realized, no wastewater is discharged to the outside, and natural water and soil are ensured not to be polluted.

The invention belongs to the technical field of computer vision monitoring, and relates to a bridge pier anti-collision facility operation state visual monitoring method and system. The method comprises the following steps: acquiring an anti-collision facility video stream under natural water flow, tracking feature points and mapping the feature points into physical plane coordinates; performing time sequence analysis on the coordinates, and extracting a connection gap signal and a vertical displacement signal; constructing a structure health dynamic model, converting a connection gap signal into a connection looseness index reflecting a connection toggle clip state, and converting a vertical displacement signal into a relative floating state attenuation index reflecting a unit buoyancy state; and the indexes are compared with a preset threshold value, so that whether the anti-collision facility has the risk of dynamic loosening or leakage water inflow or not is judged. According to the invention, buoyancy loss in the anti-collision device and dynamic looseness of the connecting structure can be effectively identified, and the bridge protection safety is improved.

The invention discloses self-cleaning photovoltaic power generation equipment which comprises a base, a frame is fixedly connected to the base, a hydraulic push rod is arranged on the base, a first water pump is arranged beside the base, a water storage tank is arranged on the base, and a second pipeline is fixedly connected to the water storage tank. A second water pump is fixedly connected to the second pipeline, a third pipeline is fixedly connected to the second water pump, a nozzle is fixedly connected to the tail end of the third pipeline, a rubber plate is fixedly connected to the hydraulic push rod, a third groove is formed in the frame, a filter screen is arranged on the base, and a photovoltaic power generation panel is fixedly connected into the frame. Through the structure, the water consumption can be remarkably reduced, the utilization rate of water resources can be effectively improved, dependence on natural water sources is reduced, the cleaning efficiency is improved, the cleanliness of the surface of the photovoltaic power generation panel is guaranteed, and the photoelectric conversion rate of the photovoltaic power generation panel is remarkably improved.

The invention discloses a Fe-N-C catalyst and application thereof in degradation of perfluorinated and polyfluoroalkyl substances, and belongs to the technical field of water treatment. The preparation method comprises the following steps: taking nitrogen-doped carbon derived from pine cones as a substrate, dissolving aminated pine cones, FeCl36H2O, sodium acetate and polyethylene glycol in ethylene glycol, reacting at 200 DEG C for 10 hours, putting in an inert gas atmosphere, and calcining at 900 DEG C for 2 hours; the Fe-N-C catalyst which simultaneously contains Fe nano particles (Fe NPs) and Fe-N single atoms (Fe SAs) and has different sizes and double sites is prepared. The catalyst and PMS are mixed and then added into water, and perfluoro and polyfluoroalkyl substances in the water can be degraded; the catalyst can activate PMS to promote formation of a non-free radical pathway, depends on a degradation mechanism of Fe (IV) = O and singlet oxygen (O), the degradation rate of PFOA within 2 hours reaches 90.5%, and the catalyst also shows relatively strong tolerance in different natural water bodies; a key thought is provided for designing the efficient catalyst, and a new technical direction is expected to be provided for environmental treatment of persistent organic pollutants such as PFOA.

The present invention relates to a method for predicting the breakthrough time of water drive in carbonate oil reservoirs based on an agent model, comprising the following steps: S1: selecting and disclosing a data set of actual production history of a certain oil reservoir; S2: dividing the natural water drive of the oil reservoir into four types of water drive according to the production dynamics of the oil reservoir; S3: using a finite element conceptual model to simulate and calculate the relevant parameters of the oil reservoir to obtain a numerical simulation sample data set; S4: constructing four types of water drive breakthrough time prediction sub-models; S5: constructing a training set of four types of water drive breakthrough time prediction sub-models; S6: training each type of water drive breakthrough time prediction sub-model to finally obtain a trained prediction model; S7: correcting the trained prediction model to obtain a final carbonate oil reservoir water drive breakthrough time prediction model. The use of this technical solution can solve the shortcomings of the existing methods for predicting the breakthrough time of water drive in oil reservoirs, such as long time consumption, poor adaptability and pertinence, and can effectively guide the specific development work of actual oil wells.

The invention belongs to the field of petroleum geology and fluid geochemistry, and discloses a method for limiting opening duration of a natural horizontal hydraulic fracturing tensible fracture in a reservoir. The method comprises the following steps: determining that a horizontal tensional fracture is developed in rock, collecting a rock sample, making a fluid inclusion slice, determining the characteristics of filling blocky crystals in the fracture, combining fluid inclusion lithofacies observation and laser Raman spectroscopy analysis technologies, and selecting a methane-rich fluid inclusion combination as a research object. And carrying out subsequent microscopic temperature measurement analysis and PVT simulation, combining a PVT simulation result with a basin evolution history, and finally obtaining the opening duration of the natural horizontal hydraulic fracturing tensible fracture on the basis of judging the existence of the ultra-quiet rock fluid pressure. The method is low in cost and high in operability, and a certain judgment basis is provided for enrichment and loss of shale gas and tight sandstone gas.

The invention discloses a natural-artificial coupling virtual water network digital twinborn model construction method and system. The method comprises the following steps: acquiring historical monitoring data of a natural water network and an artificial water network; preprocessing the historical monitoring data to obtain a standardized data base plate; constructing a natural water network model and an artificial water network model based on the standardized data base plate of the natural water network; and based on the natural water network model and the artificial water network model, constructing a natural-artificial coupling virtual model through a graph theory algorithm. According to the method, effective integration of natural water network data and artificial water network data is realized, a comprehensive and accurate data basis is provided for subsequent model construction, the comprehensive cognition and analysis capability of the whole water network system is improved, the constructed model can realize comprehensive and accurate simulation of natural and artificial water network systems, and the construction efficiency is improved. Real-time interaction and sharing of water flow, water quality and other information between a natural water network and an artificial water network are achieved, and a powerful tool is provided for reasonable allocation and management of water resources.

The invention discloses a construction and verification method of a watershed water resource comprehensive simulation and configuration model, and belongs to the technical field of water resource planning and configuration. On the basis of a natural-social binary water circulation structure, flow generation, flow concentration and allocation modules are coupled, a topological relation is determined by dividing calculation units, and a model is constructed with the minimum water shortage rate and the optimal water supply fairness as targets; establishing a multi-source database containing meteorological information, land utilization information, reservoir information and water consumption unit information; performing iterative calibration and verification on natural water circulation and social water circulation parameters by using historical data; and coupling the model which is verified to be reliable with underlying surface and climate scene data of a future planning year, and operating and outputting a water resource optimal configuration scheme. The method solves the problems that an existing model is low in coupling degree and poor in precision, and high-precision simulation and scientific configuration of a drainage basin water resource system are achieved.

The invention discloses a preparation method of manganese-based hydrotalcite and application of the manganese-based hydrotalcite in removing thallium pollution. According to the invention, the manganese-based hydrotalcite is prepared by adopting a nucleation crystallization method by accurately regulating and controlling the hydrotalcite laminate element composition, the interlayer ion species and the atomic proportion. The prepared manganese-based hydrotalcite realizes high-selectivity specific adsorption of thallium pollutants through surface hydroxyl complexing, interlayer anion exchange, electrostatic interaction and oxidation-reduction reaction. Even in a complex adsorption environment, such as interference of different pH values, various common metal cations and organic matters, the manganese-based hydrotalcite can still keep the adsorption efficiency higher than 95%, and in a natural water environment, thallium pollutants can be effectively reduced to be lower than the national surface water discharge standard (0.1 microgram / L).