100 results about "Soil infiltration" patented technology

The utility model discloses a folding type subsurface flow wetland capable of being produced in batch, which relates to the technical field of sewage treatment, and comprises an anti-seepage film and a cushion layer which are paved in a plain soil pit, the cushion layer is filled in a closed area enclosed by the anti-seepage film, the cushion layer comprises a packing layer and a soil mellow layer, the packing layer is paved on the anti-seepage film, and the soil mellow layer is paved on the packing layer. According to the rural domestic sewage treatment device, sewage is treated through a microbial soil infiltration treatment technology, the rural domestic sewage treatment effect is considered, meanwhile, the construction difficulty is small, the occupied area is small, the construction period is shortened, and the construction cost is reduced. The system can be fully integrated into a small vegetable garden or small garden ecological system of a peasant household, protects the farmland cultivation and planting habits of the peasant household, is small in investment and low in cost, and meets the requirements of domestic sewage treatment and recycling in vast rural areas.

The invention relates to the field of disaster prediction, in particular to a hydrological data prediction method based on data analysis. The method comprises the following steps: firstly, obtaining the precipitation, soil water content and soil infiltration rate of a to-be-measured area in a preset historical time period every day, obtaining the precipitation intensity every day according to the precipitation and the precipitation of each day in a preset time domain every day, and calculating the precipitation of the to-be-measured area according to the soil water content, the soil infiltration rate and the precipitation intensity every day. The method comprises the following steps: acquiring the soil severity degree of each day, analyzing the similarity of rainfall intensity and the similarity of the soil severity degree between normal days and disaster days, screening out similar normal days from all the normal days, and constructing a disaster prediction model based on the rainfall amount, the soil water content and the soil infiltration rate of the similar normal days and the disaster days. And the debris flow disaster of the current day is predicted. The debris flow disaster prediction accuracy can be improved.

The invention relates to the technical field of rainstorm and flood disaster assessment, and particularly provides a rainstorm and flood disaster assessment method and system based on multi-scale rainfall data, and the method comprises the steps: obtaining a digital elevation model of a target region, calculating a terrain curvature distribution field and an elevation mutation characteristic field, a terrain vertical gradient zone is obtained, and multiple layers of ground precipitation observation station point groups are arranged; generating a vertical weight factor according to observation station altitude distribution, and combining a radar beam direction and a terrain slope to generate a slope direction shielding coefficient; fusing ground-based radar, satellite remote sensing and ground station data, and generating a terrain optimization precipitation field through a vertical weight factor and a slope shielding coefficient; and inputting the precipitation field into the terrain coupling flood model, and deducing disaster space distribution in combination with a water flow path network and a soil infiltration correction mechanism. According to the method, the problem of observation distortion caused by terrain shielding and rainfall vertical differentiation in alpine and valley areas is solved, and the precision and reliability of rainstorm flood disaster assessment are remarkably improved.

The invention discloses a coastal saline-alkali soil infiltration calculation method based on a temperature tracing method. Acquiring data such as soil temperature data, soil water content data, water level data and soil property parameters of different soil layers; aiming at the target depth, establishing a heat transfer model considering the soil salinity, estimating initial heat parameters of the model and determining boundary conditions; discretizing the model domain by using a finite difference format, determining a total simulation period, dividing stress periods, and discretizing each stress period into a plurality of time nodes; predicting the temperature and the water content of the target depth, and establishing a loss function by minimizing the residual sum of squares of the measured value and the calculated value of the temperature; iteratively correcting the heat conductivity coefficient and the water flux in each stress period by adopting a self-adaptive optimization algorithm; the optimization parameter of the previous stress period is used as the initial condition of the subsequent period, and full-period recursive calculation is achieved; finally, the water flux of the target depth is obtained through convergence criteria and serves as quantitative characterization of the soil infiltration rate.

The application discloses a kind of substation flood intelligent monitoring method and system, it is related to electric power system safety monitoring field.The method is by building the multi-dimensional influence factor library including the bottom elevation of discharge port and pipe network permeation loss, combined with rainfall forecast executes dynamic water balance deduction, deduce according to the dynamic correction soil infiltration capacity of early rainless days, and according to the effective pressure difference of water level and the bottom of discharge port calculates net drainage capacity;Based on the deduction result, water level height field is generated by combining three-dimensional digital model for waterlogging overflow distribution;According to water level height field and equipment elevation, determine the flooding risk, and generate dispatching instruction by taking water center as target and combining prohibited operation area to optimize equipment layout coordinates;Through man-machine interaction correction parameter and trigger GPU acceleration recalculation to realize model online evolution.The application realizes the physical mechanism simulation and space intelligent scheduling under the microscale of substation, changes passive alarm into active risk deduction.

The invention discloses a domestic sewage ecological recycling device based on soil infiltration, and relates to the technical field of sewage recycling, a recycling transfer box for transferring sewage is mounted in a small wetland box, and an upper lifting plate for controlling the height of an infiltration level control plate is mounted on the outer side of the small wetland box; the sewage treatment device has the advantages that sewage is purified through soil, microorganisms and the like in the small wetland box, so that the effluent quality reaches a relatively high standard, the infiltration layer control plate can be driven to move up and down by operating the lifting plate on the outer side of the small wetland box, the infiltration layer control plate can be driven to move up and down, and the water quality is improved. Sewage can be distributed to different soil layers according to needs, the fertile degree of soil is improved, after the percolation layer control plate is adjusted to the target height, the layer fixing plate can ensure that the percolation layer control plate is stabilized at the set height, the percolation layer control plate can be guided to the designated soil layer according to needs, and recycling of water resources is achieved.

The invention mainly relates to the technical field of water conservancy and water engineering, and provides an inference formula design flood calculation method for determining runoff production parameters based on soil classification in order to solve the problem that a method for calculating design flood based on an inference formula method is not suitable for regions lack of rainstorm flood observation data. The core idea of the method is as follows: a soil classification database is adopted to classify the soil texture of a corresponding region, software is applied to simulate the soil infiltration process under different rainfall intensities, and the stable infiltration rate after runoff production is obtained as the runoff production parameter of the corresponding region; the confluence parameters and the runoff production parameters of the corresponding soil texture types are substituted into a design flood calculation formula, design flood calculation of different soil texture type areas in corresponding areas is achieved, and the method for calculating the design flood based on the inference formula method can also be suitable for areas lacking rainstorm flood observation data.

The present invention relates to the field of disaster prediction, and specifically to a hydrological data prediction method based on data analysis. The method first obtains the daily precipitation, soil moisture content, and soil infiltration rate of the area to be tested within a preset historical time period, obtains the daily precipitation intensity based on the daily precipitation and the precipitation of each day in the preset time domain, obtains the daily soil severity based on the daily soil moisture content, soil infiltration rate, and precipitation intensity, and analyzes the similarity of precipitation intensity and soil severity between normal days and disaster days. Similar normal days are screened out from all normal days. Based on the precipitation, soil moisture content, and soil infiltration rate of each similar normal day and disaster day, a disaster prediction model is constructed, and debris flow disasters are predicted for the current day. The present invention can improve the accuracy of debris flow disaster prediction.

The application provides a method and device for treating wastewater by combining a suspended filler floating bed and a soil infiltration system, and the method comprises the following steps: S1, breeding wastewater is treated by the suspended filler floating bed after passing through a hydrolysis tank, and effluent is treated in a sedimentation tank, and wastewater of the suspended filler floating bed is returned to the suspended filler floating bed for secondary treatment; S2, wastewater of the sedimentation tank is returned to the hydrolysis tank; and S3, effluent of the sedimentation tank is introduced into a soil underground infiltration system. The system provided by the application is beneficial to further strengthening the effects of denitrification, phosphorus removal and removal of suspended solids, and solves the problems of low dissolved oxygen content of influent and wastewater in the system, which is not conducive to the growth of nitrifying bacteria, and low effective volume utilization rate. In the use process, the filler does not need to be replaced, and mechanical aeration equipment does not need to be added, and the system has the advantages of low investment cost, no need to add chemical agents for treatment, obvious effect, not easy to breed mosquitoes, simple operation and management, and beautification of the environment, and has remarkable ecological and economic benefits for promoting deep purification of breeding wastewater.

The invention provides a multistage soil infiltration system for rural sewage treatment, and relates to the technical field of sewage treatment. The invention discloses a multistage soil infiltration system for rural sewage treatment. The multistage soil infiltration system comprises a water inlet layer, a water distribution layer, an infiltration layer and a water outlet layer which are arranged from top to bottom, wherein the percolation layer comprises water-permeable zeolite layers and multiple layers of mixed soil blocks arranged between the water-permeable zeolite layers. Wherein the mixed soil block is prepared by the following method: mixing purple soil with activated aluminum oxide and iron powder, and then preparing the mixed soil block. According to the invention, the multi-step mixed soil blocks are adopted, so that the time of contact with sewage is further prolonged on the basis of reducing the use of materials, and the removal capacity of pollutants can be improved; activated aluminum oxide is adopted as a carrier in the percolation layer, so that the inhibition of pollutants such as antibiotics on the denitrification effect of the system can be reduced. In conclusion, the multi-stage soil percolation system provided by the invention strengthens the capability of removing new pollutants such as antibiotics.

The application discloses a kind of fruit tree breeding experimental devices and method thereof, it is related to breeding technical field, and cultivation separation box inside two ends equidistant fixed have lifting electric slide rail, one end of lifting electric slide rail is connected with positioning electromagnetic plate by slide rail seat, and the top of positioning electromagnetic plate is connected with connecting fixed plate by magnetic attraction, and multiple porous cultivation boxes are welded between two connecting fixed plates, and collection fixed box is connected by magnetic attraction between two positioning electromagnetic plates, the application effectively solves the problem that soil cannot be ploughed for a long time in prior art, which leads to soil compaction, affects the oxygen content and water content in soil, and improves the soil infiltration rate, avoids the occurrence of plant root rot caused by excessive moisture, and the fluffy soil can ensure the steady growth and development of plant roots, ensure the optimal growth state of plants, thereby effectively improving the seedling breeding speed of fruit trees.

The invention discloses an underground water irrigation metering method and system based on electric energy consumption, and relates to the technical field of underground water irrigation metering. According to the underground water irrigation metering method based on the electric energy consumption, historical irrigation data and current irrigation data of an irrigation area and a current underground water extraction height value and a current rainfall value after current irrigation are acquired for data analysis; obtaining a historical irrigation water pump power mean value, an irrigation water pump efficiency coefficient, a water supply loss value, a current irrigation water pump power value after the current irrigation is finished, a soil water content correction value and a soil permeation correction value, and comprehensively analyzing a current underground water extraction height value and a current rainfall value after the current irrigation is finished; according to the method, real-time and historical irrigation data analysis is combined, so that the required irrigation amount can be accurately calculated, and excessive or insufficient irrigation is avoided.

The invention discloses a method and system for constructing a comprehensive evaluation index of a soil water source conservation function, and relates to the technical field of soil water source conservation, and the method comprises the following steps: measuring a soil water retention performance index and a soil infiltration performance index; based on the measured indexes, determining the weight of each index by adopting a factor analysis method, and carrying out membership standardization processing on each index; and weighting the weight of each index and the standardized membership degree to obtain the comprehensive evaluation index of the soil water conservation function. According to the method, the soil water source conservation function can be quantitatively evaluated on the sample plot scale only through one-time or few-time soil index determination, dependence on a long-term hydrological sequence is avoided, and the data acquisition cost is remarkably reduced.

The invention discloses an under-forest soil moisture migration characteristic research system and method, and relates to the technical field of forestry soil moisture migration research. Comprising an under-forest soil sampling unit, a cylinder temperature adjusting unit, an under-forest soil infiltration research experiment unit and an under-forest soil water retention research experiment unit, the under-forest soil sampling unit comprises a soil sampling drilling machine, a soil sampling barrel and a soil sampling barrel cutter; the cylinder body temperature adjusting unit is used for heating an undisturbed soil column in the soil sampling cylinder body; the under-forest soil infiltration research experiment unit is used for carrying out infiltration experiments on the undisturbed soil column in the soil sampling cylinder at different temperatures and under different earth surface conditions; and the under-forest soil water retention research experiment unit is used for carrying out field in-situ water retention observation experiments. According to the invention, the in-situ soil column is directly obtained by adopting the soil sampling cylinder, and an infiltration experiment can be directly carried out after the in-situ soil column is cut by the soil sampling cylinder, so that forestry practitioners and researchers can repeatedly obtain a large amount of undisturbed soil in a short time to carry out infiltration experiment research, and a forestry soil research method is innovated.

The present invention discloses an intelligent greenhouse, which relates to the technical field of intelligent greenhouses, comprising a first side panel, a cover panel hinged on the upper portion of the first side panel, a second side panel vertically fixedly connected to the side end of the first side panel, two wet curtain boxes equidistantly installed on the first side panel, a plurality of ventilation boxes equidistantly installed on the second side panel, a supporting mechanism provided at the lower end of the cover panel, an external sunshade mechanism provided at the end of the cover panel, the first side panel and the second side panel form a greenhouse box body, a support frame for fixed support is installed in the greenhouse box body, a soil infiltration mechanism is connected to the lower end of the wet curtain box, the gas inside the greenhouse can be better replaced by the arrangement of the wet curtain box and the ventilation box, the humidity of the greenhouse can be better adjusted by the arrangement of the soil infiltration mechanism; the air can be better humidified by the arrangement of the filter screen and the wave plate in the wet curtain box, and the wet curtain box can be closed to isolate the greenhouse from the outside air by the arrangement of the sealing rotating plate.

The invention relates to the technical field of conduction, and discloses a grounding rod easy to vertically install, comprising: a power connection column, one end of which is sequentially provided with at least two bending assemblies in the axial direction for conductive grounding; the pointed end is fixed at one end of the tail bending assembly which is axially arranged; the guiding assembly is slidably arranged on the outer side of the bending assembly in a sleeving mode so as to guide the bending assembly during installation; wherein the bending assembly comprises a conductive rod body, a fixed block and a vertical block; when the grounding rod is installed, the grounding rod with a large length is converted into a plurality of short grounding rods, a small slenderness ratio is formed, the top ends of the short grounding rods are closer to the ground, the short grounding rods are not prone to transversely swinging when being hammered, the grounding rods are well kept at the depth of being vertically inserted into the ground, in addition, water can be well injected in the axial direction of the grounding rods, and the grounding rods are not prone to being damaged. The soil infiltration effect is improved, and the resistance value is relatively low.

The invention discloses a method for calculating the flow production of a slope unit considering the regulating effect of litter, comprising the following steps: S1, calculating the total evapotranspiration of the slope unit; S2, calculating the canopy interception; S3, calculating the throughfall of the slope unit; S4, calculating the litter interception of the slope unit; S5, calculating the soil infiltration according to the Green-Ampt model; S6, calculating the surface filling amount according to the total evapotranspiration, throughfall, litter interception and soil infiltration of the slope unit; S7, calculating the flow production of the slope unit according to the surface filling amount. The invention solves the problem that the prior art lacks a method for accurately calculating the flow production of a slope covered with litter.

The present application relates to the technical field of storm flood disaster assessment, and specifically provides a storm flood disaster assessment method and system based on multi-scale precipitation data, which comprises the following steps: obtaining a digital elevation model of a target region, calculating a terrain curvature distribution field and an elevation mutation characteristic field, obtaining a terrain vertical gradient zone and arranging a multi-layer ground precipitation observation site group; generating a vertical weight factor according to the altitude distribution of the observation site, combining the radar beam direction with the terrain slope to generate a slope-shielding coefficient; fusing ground-based radar, satellite remote sensing and ground site data, generating a terrain-optimized precipitation field through the vertical weight factor and the slope-shielding coefficient; inputting the precipitation field into a terrain-coupled flood model, combining a water flow path network and a soil infiltration correction mechanism to deduce the spatial distribution of disasters. The present application solves the problem of observation distortion caused by terrain shielding and precipitation vertical differentiation in high mountain and canyon areas, and significantly improves the accuracy and reliability of storm flood disaster assessment.

The invention discloses a rural domestic grey water residue and oil separation efficient integrated pretreatment device, and relates to the technical field of grey water pretreatment, the rural domestic grey water residue and oil separation efficient integrated pretreatment device comprises a treatment box, an inspection well and an observation hole which are connected to the treatment box, and a treatment assembly and an adjusting assembly which are arranged in the treatment box, by combining the triple effects of physical adsorption, chemical catalysis and microbial degradation of the suspended matter filler, the difficultly decomposed organic matters and colloidal impurities in the sewage are deeply treated, the degradation efficiency of difficultly decomposed pollutants is greatly improved, deposition in subsequent links is avoided, the treatment load of a subsequent soil infiltration system is reduced, the stable operation of the whole process is ensured, and the treatment cost is reduced. And the treated grey water flows along the water outlet pipe, finally flows into the water outlet channel and flows out along the water outlet. After pretreatment, the concentration of sewage pollutants is greatly reduced, the system is more adaptive to the purification capacity of a soil infiltration system, an efficient preposed guarantee is provided for an infiltration path of rural domestic sewage resource utilization, and compared with a single cavity in the prior art, the integrated design saves the occupied area.

This invention belongs to the technical field of smart agriculture and relates to an intelligent variable-controlled, high-efficiency irrigation water-saving method and system, comprising the following steps: generating a combination of plant physiological data; generating a plant water stress index that quantifies the overall water shortage level of plants; combining environmental data and soil infiltration data to generate an environmental soil data combination; calculating an environmental disturbance coefficient based on wind speed and temperature data, and determining the soil infiltration rate level based on soil infiltration data; generating the overall valve opening for controlling the global water volume; generating a sub-region water allocation ratio; inputting the overall valve opening, sub-region water allocation ratio, and environmental disturbance coefficient to generate irrigation execution commands to control the dynamic water output of irrigation equipment. This invention solves the problem that physiological indicators, soil characteristics, and environmental disturbances (such as high-temperature evaporation) are often treated separately, lacking real-time complementary analysis of multi-source data.

The application belongs to the technical field of sewage treatment, and provides a sulfur autotrophic multistage soil infiltration system and application. The system comprises a sulfur autotrophic multistage soil infiltration reactor, an intermittent micro-aeration module, a uniform water distribution module and a water collection layer. The sulfur autotrophic multistage soil infiltration reactor is sequentially provided with a nitrification unit, a denitrification unit and a phosphorus removal unit from top to bottom. The nitrification unit comprises an infiltration layer, and the infiltration layer comprises filler I. The infiltration layer of the denitrification unit comprises mixed filler II, soil mixed blocks comprise mixed filler IV, the infiltration layer of the phosphorus removal unit comprises mixed filler III, and soil mixed blocks comprise mixed filler V. The sulfur autotrophic multistage soil infiltration system has excellent COD cr and nitrogen and phosphorus removal performance, good impact resistance and anti-blocking performance, high economic benefit, small land occupation, solves the problem of insufficient nitrification, strengthens the sulfur autotrophic denitrification process, and promotes the further treatment and application popularization of decentralized sewage.

The utility model discloses soil infiltration test equipment and relates to the technical field of soil infiltration measurement. The lifting device comprises a machine frame assembly, a lifting mechanism is arranged on the machine frame assembly, and a movable transverse frame is arranged on the lifting mechanism. According to the utility model, the water retaining disc is arranged on the inner wall of the inner ring cylinder and the water retaining ring is arranged on the inner wall of the outer ring cylinder, so that added water flows down along the inner walls of the inner ring cylinder and the outer ring cylinder under the action of the water retaining disc and the water retaining ring, and the water flows along the inner walls of the inner ring cylinder and the outer ring cylinder due to the tension action of the water, so that the surface impact on earth surface soil is reduced; therefore, the generation of earth surface crust is reduced, and the accuracy of soil infiltration measurement is improved; the motor drives the threaded rod to rotate, so that the movable transverse frame vertically moves along the vertical rod, automatic lifting of the inner ring cylinder and the outer ring cylinder is achieved, the inner ring cylinder and the outer ring cylinder are pressed into earth surface soil by 15 cm, manual operation is not needed, and the test efficiency and safety are improved.

The invention discloses an infiltration method and system for calculating a straw-covered slope, and the method comprises the steps: S1, obtaining a test sample based on an indoor artificial simulation rainfall test, and obtaining a sample index based on the test sample; s2, on the basis of the sample indexes, a classic infiltration model serves as a basic framework, and a bare soil infiltration forecasting model suitable for bare soil is constructed on the basis of measured data; s3, the proportional relation between the accumulated infiltration amount of the straw-covered slope and the corresponding bare slope is calculated; s4, constructing a straw coverage infiltration model based on the proportional relation and the bare soil infiltration forecasting model; and S5, inputting measured data to be detected into the straw covering infiltration model to forecast the accumulated infiltration amount of the straw covering measure slope. According to the method, the accumulated infiltration amount of the slope with the straw covering measure is forecasted in a product form. The method has an important value for evaluating the infiltration benefit of a straw covering measure.

The utility model relates to a waterfront space ecological restoration system for coping with agricultural non-point source pollution, which comprises an ecological interception ditch, an anoxic ecological ditch, an aerobic ecological ditch and a soil infiltration bed which are sequentially distributed downwards along a slope surface, water inlets and water outlets of the anoxic ecological ditch, the aerobic ecological ditch and the soil infiltration bed are respectively positioned at two end parts in respective length directions, and the ecological interception ditch, the anoxic ecological ditch, the aerobic ecological ditch and the soil infiltration bed are sequentially communicated along the water flow direction. The method has the beneficial effects that according to research, the horizontal distance between the water surface of the narrow waterfront space and a farmland or an ecological protection red line is only 2-3m, and the space capable of implementing ecological restoration is very limited, so that the water flow path is fully prolonged by utilizing the length advantage, the contact time of sewage and filler is prolonged, conditions are provided for full biochemical reaction, and the economic benefit is increased. Furthermore, the narrow waterfront space is fully utilized to intercept and reduce non-point source pollution caused by farmland irrigation and initial rainwater, so that the problem that the nitrogen and phosphorus content of an agricultural non-point source is too high is effectively solved.

The utility model relates to the technical field of landscaping, and disclose a novel landscape soil infiltration equipment, including equipment fixed base, the front end of equipment fixed base is installed with water source connecting pipe, the top of equipment fixed base is installed with spraying assembly, the bottom of equipment fixed base is installed with fixed link, the top of fixed link is installed with fixed block, the bottom of equipment fixed base is installed with mounting plate, the surface of mounting plate is equipped with two clamping grooves, the inside sliding connection of fixed block has two buckles, the inside fixed connection of fixed block has fixed plate, both sides of fixed plate all are fixedly connected with elastic spring. The novel landscape soil infiltration equipment, through can install the setting of quick disassembly of equipment, can make equipment appear damage, directly remove it from the fixed link, and then do not take out the whole, effectively reduce the operation time of staff, and then significantly improve the operation efficiency.

The utility model discloses an intelligent pump control water tank type anti-freezing water-saving toilet system with a multi-stage liquid level early warning function, which relates to the technical field of environmental protection and comprises a toilet room, a solar panel arranged at the top of the toilet room, an anti-freezing toilet stool arranged in the toilet room, a flushing pipe connected with one end of the anti-freezing toilet stool, and a water tank connected with the other end of the flushing pipe. A drain outlet is formed in the bottom of the anti-freezing toilet, the drain outlet is connected with one end of a defecation pipe, the other end of the defecation pipe is connected to a septic tank, a cushion layer is arranged at the bottom of the water storage barrel and the bottom of the septic tank, and the septic tank and the water storage barrel are both located between the ground plane and the cushion layer; the septic tank is communicated with the outside through a slag cleaning opening and a manure cleaning opening, and the tail end of the septic tank is connected with a soil percolation treatment system. By means of the anti-freezing toilet stool, the heat-preservation water storage barrel, the liquid level controller, the solar panel and the double-layer anti-freezing septic tank, farmers can be assisted in completing water conservation, energy conservation, freezing prevention, excrement treatment and the like of the toilet.

The utility model discloses a soil infiltration water collecting device, and relates to the technical field of environment monitoring. The soil infiltration water collection device comprises a water storage tank, the top of the water storage tank is connected with a plastic basket, the top of the water storage tank is connected with a collection box, a partition plate is arranged in the collection box, a hard plastic filter plate is arranged at the top of the partition plate, and a soft plastic filter plate is arranged in the collection box. By adopting the infiltration water device, the content of trace elements brought by soil infiltration water can be effectively measured, the input flux of soil infiltration in a farmland plough layer can be accurately calculated, and a new technology is provided for accurately measuring an artificial pollution source.

The present application belongs to the technical field of sewage treatment, and particularly relates to an iron-carbon micro-electrolysis coupled soil infiltration system, application and a sewage treatment method. The technical scheme of the present application is an iron-carbon micro-electrolysis coupled soil infiltration system, which comprises, from top to bottom, a soil covering layer, a gravel water distribution layer, a substrate filler layer and a gravel supporting layer; the substrate filler layer is filled with at least iron-carbon filler. The present application further provides application of the iron-carbon micro-electrolysis coupled soil infiltration system in sewage treatment and a sewage treatment method. The present application provides a new option for removal of pollutants in domestic sewage and greenhouse gas emission reduction.

The utility model discloses a soil permeability measuring device, which relates to the technical field of soil permeability measurement and comprises a test piece, a pick-and-place hole is arranged in the test piece, a sample and a base are arranged in the pick-and-place hole, a placing plate is arranged above the base, a support column is fixedly connected onto the placing plate, and the bottom end of the support column is fixedly connected onto the base. A test piece is placed on the placing plate, a through hole is formed in the placing plate, and a collecting cylinder is placed on the base. The device is reasonable in design structure, the water storage assembly and the moving assembly are arranged in a matched mode, the electric push rod is used for controlling the water storage assembly to ascend and descend, the measuring cylinder can accurately control the amount of water conveyed into the water spraying pipe, the consistency of experiment conditions each time is ensured, the water spraying pipe can ensure that water is evenly distributed on the surface of sample soil, and the experiment efficiency is improved. The rapid permeation of water molecules is promoted, and the measurement efficiency and the data accuracy are improved.

The invention provides a forest land water-saving irrigation method based on plant water demand and soil infiltration calculation. The forest land water-saving irrigation method comprises the following steps: (1) determining an effective rainfall utilization coefficient of a forest land; (2) calculating daily evapotranspiration and soil infiltration amount of the forest land; and (3) calculating the daily irrigation volume of the forest land. According to the method, fine management of water-saving irrigation in the plant growing season and efficient utilization of water resources can be achieved, calculation of the daily water demand of vegetation is refined by applying a numerical model simulation technology based on comprehensive observation of rainfall, weather and forest land soil moisture, the daily water demand is divided into vegetation transpiration and soil evaporation, and the vegetation transpiration and the soil evaporation are calculated. In this way, the deep understanding of the vegetation water demand rule can be improved; meanwhile, the quantitative relation between the soil infiltration amount and the rainfall amount is established, the soil infiltration amount is used as the effective rainfall amount, a rainfall coefficient constant calculation method is replaced, and the difference of effective rainfall under different rainfall and vegetation conditions can be reflected more truly.