155 results about "Groundwater recharge" patented technology

The invention discloses a simulated experiment device of infiltration and seepage which comprises a simulation case with a water storage tank and a horizontal soleplate; a water-supplying chamber, a simulation chamber with a water-bearing layer, and a water drainage chamber are arranged in the simulation case; an infiltration device arranged at the top of the simulation case is installed in the simulation chamber; an infiltration case with an infiltration rain fall plate at the bottom and an infiltration liquid supplying case positioned at the top of the infiltration case are arranged in the infiltration device, and the top of an infiltration liquid pipe located in the infiltration case is communicated with the bottom of the infiltration liquid supplying case; a tracer injection case is arranged at the top of the simulation case and at the upstream end of the simulation chamber, and the tops of at least three tracer control pipes positioned in the water-bearing layer of the simulation chamber and provided with control valves are respectively communicated with the bottom of the tracer injection case. The invention with a reasonable structure provides intuitive information on the physical process that water infiltrates the ground surface to supply the ground water, the ground water recharge method, seepage characteristics of steady movement of ground water, in order to conduct the relevant experiment and parameter measurement.

The invention provides a trough for simulating groundwater pollution. The simulated trough at least comprises a trough which is internally filled with an aquifer medium, an aquifuge medium and a lens which are used for simulating typical hydrogeology unit; the simulated trough is provided with an underground water recharge area, a runoff area and a discharge area sequentially from the trough head and the trough body to the trough tail; a hydraulic control device supplies water from the underground recharge area located at the trough head; the runoff area at the trough body comprises a water-distribution and water-rock interaction section containing a porous barrier and a pollution restoration device; the water is discharged out from the discharge area located at the trough tail; the hydraulic control device comprises at least two water boxes with adjustable height; the two water boxes are arranged at two ends of the trough body respectively; a water level difference exists between the two water boxes so as to provide an underwater power field; a plurality of monitoring holes and contamination injection holes are arranged above the trough; and the monitoring holes are connected with the monitoring system. The simulated trough for simulating the groundwater pollution has the advantages of integrating simulating, monitoring and restoring functions into a whole.

The invention relates to the field of controlling underground water inrush disaster for mining projects and relates to a comprehensive treatment method of mine water inrush. The method includes the steps of setting a mine hydrogeology observation network; measuring a mine underwater supply area, a mine drainage area and a mine runoff area; exploring and measuring a water guide passage and fissures of the mine underwater supply area; determining and implementing a grouting curtain blocking scheme of the mine underwater supply area; designing and implementing a drainage treatment scheme of the mine drainage area, and after implementing the grouting curtain blocking scheme, performing underwater drainage treatment in the mine drainage area; implementing a scheme for dynamic monitoring of mine underwater level and information-based dredging and blocking treatment, during underwater drainage treatment in the mine drainage area, and dynamically monitoring the underwater level in the mine runoff area to finish the scheme.

The invention relates to a groundwater recharge system structure for foundation pit dewatering. The purpose of the invention is to provide a groundwater recharge system structure for foundation pit dewatering which is capable of reducing and retarding surrounding stratum settlement and ground settlement caused by foundation pit dewatering under the state of an enormously thick confined aquifer, and simultaneously capable of overcoming the shortcomings such as recharge well blockage and water outflowing at the outer side in the prior art, improving the recharge efficiency and also prolonging the service life of the recharge system. The groundwater recharge system structure is matched with a foundation pit depressurizing system in use, and comprises a recharge well and a recharge device, wherein the recharge well comprises a well pipe; a water stop layer, a water-resisting layer and a filter layer are orderly arranged on the outer wall of the well pipe from top to bottom, a mudjacking pipe is reserved outside the well pipe, a sedimentation pipe is arranged at the bottom of the well pipe, a two-layer wind filter is arranged at the upper part of the sedimentation pipe, and a water suction pump is arranged in the well pipe 2-6m away from the bottom of the well, and the like; the recharge device comprises a recharge pipeline, a water release pipeline, an exhaust pipeline and the like.

The invention discloses an urban hydrological simulation system and a simulation method, which relate to the technical field of urban precipitation management. The invention includes a rainfall floodmanagement model, the simulation system includes a time-varying precipitation unit, a surface water evaporation unit, a snow cover and melt unit, a depression interception unit, a soil seepage unit, agroundwater recharge unit, a groundwater and drainage pipe exchange unit, a slope catchment unit, a LID control unit, a region editing unit that are associated with the rainfall flood management model, and the simulation system further comprise a storage module, an aquifer editing module and a groundwater flow editing module. The invention has comprehensive simulation function and can provide comprehensive and representative analysis data through a complete functional system unit structure. The influence of DCIA and TIA setting on runoff generation in urbanization region is analyzed under thepremise of comprehensive consideration of parameters. More objective and accurate reference and opinions are provided for urban planning.

The invention discloses a groundwater recharge and infiltration promoting method, and belongs to the technical field of groundwater artificial recharge. According to the method, a recharge tank is artificially dug and built on a high-permeability soil layer, coarse sand serving as an inverted filter backfill material is filled in the recharge tank, exhaust pipes capable of exhausting air in a vadose zone are arranged in the recharge tank and at the periphery of the recharge tank, and the exhaust pipes at the periphery of the recharge tank are exhausted by a vacuum pump. The exhaust pipes and an air extractor are arranged, so that the average infiltration rate of the recharge tank is improved by 4-5 times when groundwater is artificially recharged, and the effect is durable and obvious.

The invention provides an improved method and device for measuring and real-time monitoring the pressure of water in pores of an underground soil layer. The invention is characterized in that the detection can be realized by pressing a water-permeable water pressure sensor which is protected by a solid shell into underground by virtue of pressure, the water pressure sensor is arranged in a hollow cavity of the solid hollow bullet shell, the rear end of the bullet shell cavity is open so as to form a ventilating channel, a water permeating hole which penetrates the shell walls and is communicated with the hollow cavity is arranged on the bullet shell, a water-permeable mud-blocking layer is arranged between the water permeating hole and/or the water pressure sensor, and the rear end of the bullet shell is provided with a splicing type hollow probing rod in a flexible connection mode, thus the detection of the pressure of water in the pores of underground layer can be realized without excavating and drilling. Furthermore, the method is simple, the detection cost is low, the detection is accurate, the detection of the pressure of water in the pores in multiple different height layers above the maximum depth can be realized, and a new detection method for pressure of the water in the underground pores, especially the pores in the undisturbed soil, can be created.

The invention provides a comprehensive treatment method for acid mine water of small abandoned coal mines. A slurry is injected into a grouting filling layer, a plugging surface layer is formed afterthe slurry is solidified, the underground water supplementary amount of atmospheric precipitation to underground mined-out areas of the abandoned mines in a target area is reduced, and a permeable reactive barrier, a continuous alkali production pool and a constructed wetland section are continuously arranged at mine wellheads of the small abandoned coal mines with relatively good maintenance conditions; a drainage canal collection system is built around surface rivers in the target area; coal gangue piles in the target area are subjected to closed treatment. The integrated technical scheme realizes comprehensive treatment of the acid mine water in a number of small abandoned coal mines distributed in the target area, and has the advantages of high practicability, low cost and good effect.

The invention discloses a foundation pit groundwater recharging system. The foundation pit groundwater recharging system comprises a back wash unit, a water pumping well, a one-level water storage tank, an aeration unit, a one-level filter, a two-level filter, a two-level water storage tank and a recharge well. The water pumping well, the one-level water storage tank, the aeration unit, the one-level filter, the two-level filter, the two-level water storage tank and the recharge well are sequentially connected. The back wash unit is connected with the one-level filter and the two-level filter. The foundation pit groundwater recharging system further comprises a control treatment unit and a water level monitoring unit which is connected with the water pumping well, the two-level water storage tank and the recharge well. The control treatment unit comprises a water pumping control subunit connected with the water pumping well, a water treatment control subunit connected with a recharge water quality treatment system and a recharge and flow control subunit connected with the recharge well. According to the foundation pit groundwater recharging system, the effect that land subsidence surrounding a foundation pit due to rainfall is avoided can be ensured, and meanwhile, optimization of recharge water quality is further really achieved. After recharge of recharge water is finished, drop of the water level of regional groundwater, water quality reduction and pollution do not occur, blocking of the recharge well is also avoided, and the recharge effect is good.

The invention discloses an LID (low impact development) type rainwater ditch and a design and calculation method for the same, and is applicable to various rainwater drainage ditches such as drainage ditches, farmland drainage ditches and floodwater drainage ditches on two sides of a slope and two sides of a road. The rainwater ditch comprises a ditch, storage dams, overflow ports, a rubble layer, a sandy soil layer, ecological slopes and the like. The sandy soil layer is laid on a bed of the ditch, the rubble layer is laid on the upper side of the sandy soil layer, and the storage dams are longitudinally continuously arranged along the ditch and are separated from one another by a certain distance, so that a series of reservoirs which are continuously distributed are formed along the ditch. The design and calculation method includes designing and calculating layout spacing of the water storage dams and the sizes of the overflow ports. The LID type rainwater ditch and the design and calculation method have the advantages that the LID type rainwater ditch has multiple functions of 'drainage, water storage, infiltration and decontamination', and is incomparable to a hard rainwater ditch only with a drainage function; the LID type rainwater ditch is high in water storage capacity and drainage speed which are deficient in a wetland bed type rainwater ditch; the rainfall flood runoff volume can be obviously reduced, the groundwater recharge can be improved, non-point surface pollutants of rainwater can be reduced, and environments can be beautified.

The present invention discloses a groundwater recirculation method for water source heat pump energy-saving air-conditioning cooling water system, and the pumped groundwater can be fully recirculated to an underground same water bearing bed. The present invention is characterized in that measurements of a recirculation well arranged in influence scope of precipitation of a pumping well, smoothed recirculation channel by the enhanced granular diameter of filling granules 4 provided between pipelines and a well hole, and secondary well cleanout dredging of the recirculation channel are adopted. Cooling water entries into a filtering layer by gaps of filtering pipes, and then smoothly entries into the underground water bearing bed, the problems of the easy taken out of the water and difficult recirculation ordinarily existed in the existing underground water source air heat pump air-conditioning system are thoroughly resolved. Meanwhile, the present invention has the characteristic of easy construction, and can be widely used for the underground water source heat pump energy-saving air-conditioning system currently vigorously promoted by the State and is suitable for the tailings clamped with a gravel layer of water bearing bed of the groundwater heat exchanging system of the ground source heat pump or the deep hole of large diameter with a depth within 100 m and the gravel layer.

The present invention discloses an ozone-permeable reactive barrier repair system and a method for groundwater repair by using the system, and belongs to the technical field of groundwater pollution repair. According to the present invention, based on a characteristic of difficult repair of petroleum polluted groundwater, groundwater of a petroleum polluted groundwater pollution region is subjected to ozone reinforcement aeration, and a permeable reactive barrier is installed below water flow of the groundwater. With the present invention, groundwater polluted by petroleum and organic matterscan be effectively repaired while volatile components in groundwater and soil can be effectively treated; characteristics of strong adaptability to water quality of petroleum polluted groundwater, high stability, easy operation, simple treatment process, and continuous operation are provided; water quality of the treated water is good; only adsorbent replacement according to a prompt is required;and characteristics of economy, saving and high treatment efficiency are further provided.

A recharge type urban rainwater flood comprehensive utilization system is capable of meeting urban ecological water utilization requirements and sustainably regulating urban rainwater systems, is system engineering giving priority to rainwater storage and equipped with retention and water storage facilities and can be widely used for the field of urban rainwater flood utilization and groundwater recharge. According to monitoring of the underground water level and underground funnels and analysis on rainfall and confluence, key recharge areas are determined, and depression soakaway pits, seepage wells and deep recharge wells are arranged reasonably, so that rainwater is retained dispersedly and recharged insitu. By means of connection among permeation pipelines, underground rivers and open channels and by the aid of manual control measures of gates, water pumps and the like, a water body can flow in a connecting loop, and accordingly recharge time is prolonged, self-cleaning capacity of the rainwater is enhanced and contradiction between high rainwater flood generation speed and seepage recharge slowness is effectively overcome. Comprehensive regulation of the urban rainwater, surface water and underground water is achieved by combining groundwater recharge with planning of earth surface lake water systems, so that investment in engineering facilities is lowered, and disasters of surface subsidence and the like caused by groundwater recession are effectively relieved. Retention and regulation capabilities are enhanced by building a water ecologically-friendly park on the loop, and the goal of ecological city construction is promoted by means of combining the water ecologically-friendly park with construction of surface water systems and ecological river embankments on two banks.

The invention discloses a refrigerant recovery device and a method of a heat pump of an air-conditioner and an outdoor unit of the air-conditioner. The recovery device comprises a compressor, a multiported valve, an outdoor heat exchanger, a gas-liquid separator, a throttling part, a liquid side stop valve and a gas side stop valve. The output end of the compressor is respectively connected with the outdoor heat exchanger and the gas side stop valve through the multiported valve. The input end of the compressor is connected with the gas-liquid separator which is connected with the gas side stop valve through the multiported valve. The outdoor heat exchanger is connected with the liquid side stop valve through the throttling part and the liquid side stop valve is connected with the gas side stop valve through a junction pipe. According to the invention, the junction pipe connects the liquid side stop valve with the gas side stop valve in the outdoor unit of the air-conditioner, therefore, not only is refrigerating and heating test run detection of the outdoor unit on a production line guaranteed, but also the refrigerant recovery effect of the outdoor unit is guaranteed so that the reliability of the outdoor unit is further improved. For the outdoor unit with large groundwater recharge, the refrigerant recovery time is shortened and the production efficiency is improved greatly.

The invention relates to a groundwater feeding system used to collect rain and avoid blooding ground, wherein the invention is characterized in that: it arranges garage parking; arranges cover plate above the road, to form the rail collecting system with roof of garage parking, cover plate and parks. Said part has water pools to collect the rain; the upper water pool of water pool can keep the water level; the circumference of park is arranged with baffle wall, to avoid the rain to flow into the road, and leak abundant rain into ground, to feed the groundwater.

The invention discloses a groundwater recharge simulation experiment method, which is realized on a groundwater recharge simulation experiment platform. The experiment platform comprises a dynamic water level simulation device, an aeration zone simulation device, a rainfall irrigation simulation device and a groundwater recharge simulation device. The evolution of a groundwater flow field during the recharge process is simulated by adding different pollution sources to the aeration zone simulation device. Various potential groundwater quality pollution influencing factors during the groundwater recharge process are simulated in a pollution correlation simulation device, and various key parameters are obtained.

The invention discloses a vegetation evapotranspiration monitoring device suitable for a complex surface. According to the vegetation evapotranspiration monitoring device disclosed by the invention, by regulating air flows at the inlet and the outlet and combining a stirring fan, the air humidity condition in a hood box of the vegetation evapotranspiration monitoring device is regulated, and water vapor is prevented from condensing; a base of the vegetation evapotranspiration monitoring device is provided with telescopic seat legs and a soft transparent sealing material and does not have a need of ensuring strict sealing when being mounted, so that the mounting difficulty is greatly weakened, and the vegetation evapotranspiration monitoring device is suitable for being mounted and used under the complex surface condition; as being mounted on the ground surface, the vegetation evapotranspiration monitoring device has small influence on the underground hydrology process including groundwater replenishment and soil moisture movement. The invention also discloses a vegetation evapotranspiration monitoring method suitable for the complex surface. According to the vegetation evapotranspiration monitoring method disclosed by the invention, the evapotranspiration rate of vegetation is determined by determining variations of temperature and humidity of air in the sealed box body caused by vegetation evapotranspiration and a humidity difference of exchanged air; the accuracy is high, and dynamic variation of vegetation evapotranspiration can be captured. The vegetation evapotranspiration monitoring device has a simple and clear structure, is flexible in size, convenient and simple in mounting and low in cost and can be widely applied to the fields including the ecological field, the meteorological field, the hydrological field and the agriculture and forest field.

The invention relates to a critical burial depth computing method for a groundwater recharging vegetation. The critical burial depth computing method comprises the following steps: collecting data; establishing a rule model of known soil; computing effective aperture; computing the maximum lifting height of tubular billet water; computing the critical burial depth of the groundwater recharging vegetation. Through analyzing the functional relationship between underground water and a vegetation root system, the computing method elaborates the physical process of the groundwater recharging surface vegetation and defines the critical burial depth of the groundwater recharging surface vegetation; by taking the thickness of a diving activity layer and the thickness of the vegetation root layer as the computing goal, the determined critical burial depth computing method for a groundwater recharging surface vegetation is structured, and thus the technical blank is filled. The method has clear physical process and function mechanism, and also has the technical university for the vast arid region and semi-arid region; besides, the method provides reliable theoretical and technological supports for the reasonable development and utilization of underground water resource and water containing layer of underground water.

The invention discloses a model test device and a test method for monitoring an effect of tunnel water inrush on groundwater environment. The device comprises a whole model frame of a groundwater test, wherein a groundwater channel model is arranged in the whole model frame of the groundwater test, an inlet end of the groundwater channel model is connected with a water tank mounted at the top of the whole model frame, and an outlet end is connected with a tunnel model; a layer of fine stone is paved on the upper surface of the groundwater channel model; a groundwater level monitoring device is placed on a frame of the tunnel model; a CT(captive test) detection device which is vertical to a groundwater channel is arranged in the whole model frame of the groundwater test, the whole model frame of the groundwater test is made of antiseptic wood materials, besides two layers of insulated paint are brushed on the inner side of the whole model frame, and the whole model frame is coated with waterproof cloth to form a leakproof combination; a flume used for storing excurrent groundwater caused by the water inrush is placed outside the opening of a tunnel, and the groundwater is drawn back to the water tank through a water pump to be recycled.

The invention provides an isolation processing method of polluted groundwater. The isolation processing method comprises the following steps: an anti-seepage curtain separated moderately-strong permeable layer is established through a vertical anti-seepage system and a horizontal drill hole or an adit, and a vertical and horizontal draining device and a monitoring system are arranged in a weak permeable layer to change and control the groundwater seepage path to control the groundwater leakage amount of the weak permeable layer, so that the requirement that the permeability coefficient reaches 10<-7> cm/s is met, and the influence of groundwater seepage pollution on the surrounding environment can be completely controlled. The isolation processing method combines a vertical anti-seepage technology, a horizontal and vertical groundwater draining and dynamic monitoring technology and a dynamic groundwater control technology, and thus has a high application value, and is especially suitable for seepage control of polluted groundwater in a tailings impoundment and other polluted groundwater.

An underground water recharge well anti-jamming system, the invention relates to an underground water recharge well device and aims at solving the problems that once the recharge well is jammed the recharged water quantity into a single well becomes less and less and the water even cannot recharged; the well pipe filtering device is arranged underground and then the cleaning and maintaining are inconvenient as these works obstruct the application of underground water-supply heat pumps. A first well (1) of the invention is connected through pipelines with a first-class cyclone desander (2), two second-class filters (3) are connected in parallel, then one end is connected through the pipeline with the first-class cyclone desander (2) and the other end is connected through pipeline with a water-supply heat pump heat-exchanging mechanism (6) which is connected with pipeline with a second well (5). With the first-class cyclone desander and the second-class filters of the invention, the suspension substances in the first well can be filtered to prevent thin sands, etc. suspension substances from jamming the second well and to avoid the problem that the recharged water quantity into the single well becomes less and less and the water even cannot recharged, so as to lead the underground water-supply heat pump to be applied well.

The invention relates to the field of engineering model tests, and discloses a device for simulating a coupling effect of a foundation pit excavation stress field and an underground water seepage field. The device comprises a model case, a rainfall device, a water supply tank, two variable waterhead cases and a foundation pit excavation model box located in the model case, a displacement sensor isarranged on the foundation pit excavation model box, soil pressure sensor and water pressure sensors are arranged around the foundation pit excavation model box, a pressure measuring hole is formed in the model case, the pressure measuring hole is connected with a water pressure data collection device through the water pressure sensors, a drip hole is formed in the bottom of the rainfall device,a water pump is arranged in the water supply tank, the water pump is connected with the rainfall device through a rainfall conduit, and the bottom of the variable waterhead case is respectively connected with the water supply tank and the model case through a water supply tank connecting pipe and a model case connecting pipe. The device disclosed by the invention can simulate the mutual influenceof the stress field and the seepage field in an foundation pit excavation process under different underground water feeding conditions, and realizes the measurement of an underground water flow fieldand foundation pit settlement under different foundation pit excavation working conditions by the same experimental device.

The invention discloses a simulation testing system of groundwater recharge and an establishment method thereof and belongs to the technical field of environmental protection. The simulation testing system structurally comprises a model frame and a water supply tank, wherein the model frame comprises a test soil tank and test water tanks, the test water tanks are arranged at the two ends of the test soil tank so as to adjust the water level of underground water in the test soil tank, the adjacent faces between the test water tanks and the test soil tank are water-permeable faces, a recharge well is arranged in the test soil tank, an osmotic pressure sensor and a temperature sensor are arranged in a soil layer of the test soil tank and are connected with a control platform, and a water supply tank is communicated with the recharge well through a water supply pipeline. The simulation testing system is simple in structure and lifelike in simulation, can visually show the recharge process of the underground water and facilitates the study on the influence rule of recharge pressure to an underground water seepage field and a spatio-temporal evolution rule of a rainfall curved-surface shape.

The invention relates to a magnetic field-based in-situ repair method for polluted groundwater, belongs to the technical field of water treatment, and provides a groundwater in-situ repair method capable of solving the problems that nano-iron has low possibility of movement in groundwater and cannot be recycled after repair. The magnetic field-based in-situ repair method comprises the following steps: 1) digging one or more injection wells in the upstream of a polluted groundwater area; 2) digging a ditch-shaped trough in the downstream of the groundwater area; 3) arranging a magnet in the ditch-shaped trough, and reserving a certain area to serve as an iron-rich area; 4) injecting an nano-iron suspension into the polluted groundwater area, wherein nano-iron in the nano-iron suspension moves towards the magnet through the polluted area under the action of magnetic force; 5) starting an extraction pump to extract iron in the iron-rich area. The magnetic force of the magnet provides power for movement of the nano-iron in the groundwater, nano-iron can be enriched in the surface of the magnet after repair, and secondary pollution caused by repair can be avoided only by extracting out the nano-iron.

The invention discloses an automatic efficient pumping and recharging convertor which comprises a pipeline, wherein two ends of the pipeline retract radially; at least one pair of open pores are formed in the pipe wall; a rod object is assembled in the pipeline; the rod object is fixedly connected with a cylinder; the cylinder is in sliding fit with the inner wall; the height of the cylinder is larger than the diameter of each horizontal open pore; the lower end of the rod object is fixedly connected with a cylindrical piston; and the diameter of the cylindrical piston is larger than the inner diameter of a lower opening of the pipeline. Head pressure in a pumping and irrigation process is used for pushing the cylindrical piston to move, and bi-directional purposes of pumping and recharging can be realized by one pipeline. The head loss is small, the efficiency is high, the defect that a pump pipe loosens due to the fact that two pipes collide during recharging or re-spreading is avoided, a small diameter well can meet the recharging or pump lifting requirement, the well completion cost is reduced, attachments on the filter pipe wall can be effectively washed away under the condition that the stable state of the pump pipe is guaranteed, recharge well blocking is reduced, and the service life of a recharge well is prolonged. The automatic efficient pumping and recharging convertor can be widely applied to submerged pump connection, rain flood groundwater recharge, ground source heat pump water cyclic utilization, well repair, groundwater recharge and water supply diversion.

The present invention discloses a subsurface flow exchange simulation measurement method under different groundwater recharge conditions. The method comprises following steps: laying a clay layer anda quartz sand layer in sequence on the bottom of a water tank, and laying a water pipe with holes on both sides of the inner wall of the water tank; placing a river channel shape control panel in thecenter of the water tank and inserting into the quartz sand layer, and taking out the quartz sands inside the control panel, to form an artificial simulated river channel; taking out a control panel,injecting colored water into the water tank, and injecting clean water into the water pipe with holes, and in a subsurface flow exchange area, exhibiting a different shade of color by the quartz sandsalong with the lateral subsurface flow exchange; recording a migration trajectory of the color by a camera and a display; and discharging water in the water tank when color data of the subsurface flow exchange area no longer changes. The method avoids manual injection of a tracer agent, has high efficiency and high speed; can simulate lateral replenishment of groundwater to surface water; can continuously measure and obtain high-precision data, and can reuse test materials; and has sensitive measurement, and intuitively and accurately simulates the lateral subsurface flow exchange transient processes.