59 results about "Seawater intrusion" patented technology

The invention discloses an experimental apparatus and method for simulating the influence of the underground water level of a coastal reclamation area on water-salt movement. A transparent cuboid soil box is placed into a transparent underground water level control box; a moisture sensor installing hole, a salinity sensor installing hole, a temperature sensor installing hole and a sampling hole are formed in the side wall of the soil box along a direction parallel to the center line of a column body at different radial heights; a filter layer is formed at the bottom of soil in the cuboid soil box, and is wrapped with non-woven cloth; a water flow hole is formed in a side wall which is at the same height as the filter layer; a detachable grid movable plate is arranged on the side wall of the cuboid soil box; an infrared lamp or an incandescent lamp is arranged above the cuboid soil box; a water pipe and a water valve are arranged at positions, which are close to the bottom, on the underground water level control box. By adopting the experimental apparatus and method, soil water-salt movement under the condition of rising of the underground water level due to seawater intrusion in the coastal reclamation area can be simulated, real-time dynamic monitoring can be performed, and the soil water-salt movement rule can be researched by changing different experimental conditions such as different water qualities and water levels in the underground water level control box.

The invention relates to an in-situ automatic monitoring method and system for the range and degree of underground seawater intrusion, comprising: 1) establishing a standard curve corresponding to the seawater content and conductivity value in the fresh water in the monitoring area; 2) determining the seawater/fresh water The resistivity value of the boundary line is used as the criterion for discrimination; 3) The resistivity value corresponding to each electrode point in the vertical direction is measured in situ by the resistivity probe rod, so as to determine the range and degree of seawater intrusion; and determine the position of the seawater/fresh water boundary line; The electrode spacing of the rate probe rod is 2.0 cm. The monitoring method of the present invention can automatically monitor the monitoring of underground seawater intrusion, avoiding the complicated work caused by manual intervention and intervention; through in-situ real-time resistivity monitoring, the resistivity data of underground water-bearing media can be provided in real time, and delineated The range of seawater intrusion and the degree of intrusion of the intrusion area determine the seawater/fresh water boundary, achieve long-term in-situ monitoring, and provide actual basic data for the prevention of seawater intrusion.

The invention discloses a monitoring and evaluation method for seawater intrusion and soil salinization. The monitoring and evaluation method comprises the following steps: acquiring soil electric conductivity ECe of a to-be-detected area; acquiring a groundwater level L and groundwater electric conductivity ECw of the to-be-detected area; fitting a relationship of the groundwater level L and the groundwater electric conductivity ECw by using a Marquardt method according to the groundwater level L and the groundwater electric conductivity ECw, and fitting to generate a soil electric conductivity fitted value (shown in the description); selecting N monitoring points from the to-be-detected area, and respectively acquiring the soil electric conductivity ECei and the soil electric conductivity fitted value (shown in the description) of each monitoring point as well as a soil electric conductivity fitted result average value (shown in the description) of the N monitoring points so as to calculate out an evaluation result of seawater intrusion and a soil salinization disaster chain effect. According to the monitoring evaluation method disclosed by the invention, the seawater intrusion degree and the soil salinization degree of the to-be-detected area can be accurately monitored, and the influence degree of the seawater intrusion on soil salinization disaster can be accurately judged, so that the seawater intrusion and a soil salinization grade can be comprehensively evaluated.

The comprehensive control and treatment method of underground water resource intruded by sea water includes the following steps: surveying the topography and its surface features of control area in overall; finding out the main stream position and direction of alluvial fan of the quaternary system, further finding out the monadnock within nearest distance of left and right banks of main stream position of quaternary system alluvial fan; using connecting line between two monadnocks as central line of grout curtain wall, curtain grouting is started from bedrock and grouting to sea level elevation; setting diversion dam on entrance of river in the control area; setting several sunk well with large gushing water on the main stream position of quaternary system allavial fan at up-stream side of curtain wall.

The invention discloses a seawater invasion monitoring method. The method comprises the following steps of: arranging a host and distributed measuring electrodes, wherein the distributed measuring electrodes are arranged in a geological disaster seawater invasion observation well, and recording the depth of the well where each electrode is located; selecting a test electrode, electrifying the selected electrode to make the electrode form a loop through well liquid, and measuring voltages of two ends of a sample resistor which is connected in series to the interior of the loop; acquiring a conductivity numerical value of the well liquid of the electrode according to the voltages; and determining a demarcation situation of freshwater according to the conductivity numerical value and the depth of the well where each electrode is located, so as to realize monitoring of a seawater invasion situation. The invention also discloses a distributed conductivity geological disaster monitoring device. By acquisition of the conductivity numerical value of the well liquid with different depths in the geological disaster seawater invasion observation well, based on a linear relationship between the conductivity of water and salt content, according to the conductivity numerical value and the depth of the well where each electrode is located, the demarcation situation of the freshwater is determined, and the monitoring of the seawater invasion situation is finished conveniently, quickly and correctly.

The invention discloses an underground reservoir technology preventing seawater intrusion. Hydrogeologic survey serves as a mean, interfaces, positions, ranges and modes of underground seawater intrusion of islands, reefs and coastal cities are found out, an underground water-blocking curtains are built to cut off hydraulic connection between underground seawater and fresh water, an artificial underground water storage layer is built, and rainfall is fully intercepted by means of seepage-prevention ditches, radiation wells and the like. A seawater intrusion channel is cut off in a key position, seawater intrusion is prevented, the problem about fresh water resource self-supply of coastal cities, islands and reefs can also be solved, and fresh water resources are scientifically and reasonably protected, developed and used.

The invention discloses an underground reservoir technique. An underground water-block curtain is built, and fresh water resources are stored in an underground aquifer or artificial aquifer. In addition, surface runoff is formed after a seepage intercepting ditch is arranged on a water path and atmospheric precipitation is intercepted, the surface runoff is stored in the underground aquifer or artificial aquifer through natural infiltration or forced infiltration to form the underground reservoir, therefore, stored underground water can be exploited concentratedly, and the precious atmospheric precipitation, surface water and underground water resources are protected and fully utilized. The underground reservoir technique is suitable for mountainous areas lacking of water, seawater intrusion resistance and fresh water supply in islands and coastal cities, sponge cities and comprehensive treatment of small watersheds and can effectively solve the local fresh water resources shortage problem.

The invention discloses a method for discriminating seawater intrusion through micro-particle analysis. The method includes following steps: collecting a to-be-detected underground water sample, transferring particles in the underground water sample to a transmission electron microscope carrying net to prepare a transmission electron microscope sample; analyzing characteristics of the micro-particles in the sample by the transmission electron microscope; and finally discriminating whether the underground water sample is suffered from the seawater intrusion according to the characteristics of the micro-particles and salinization of the underground water exists or not, which is used as a basis for discriminating the seawater intrusion degree. Meanwhile, accuracy of discrimination of the seawater intrusion in the underground water is improved by combination between the result of the analysis of the micro-particles in the underground water and isotope characteristics of the underground water, total dissolved solids (TDS), salinity and such relative information of the underground water for comprehensive analysis. The method is simple and easy to carry out, is low in cost, can accurately detect seawater-enriched elements and compounds brought into the underground water by the seawater intrusion and meanwhile obtain abundant elementary chemical information, and is more accurate and high-efficient in result.

The invention relates to the field of solar-powered seawater desalination, and aims to provide a novel device for controlling seawater intrusion. The novel device can effectively utilize sufficient natural energy to desalt seawater for a long time and replenish a water bearing stratum, has low pollution to the surrounding environment, is free of energy consumption and has very high applicability, and the engineering is easy to realize. Therefore, the technical scheme is that the device for controlling seawater intrusion by the natural energy comprises a floating type solar-powered seawater desalination device, a wind-acting desalted water source transporting device and a coastal aquifer stored water permeating ditch, wherein the floating type solar-powered seawater desalination device comprises a condensing plate, a solar thermal collector, an empty-bottom water collecting bucket, condensate water collecting equipment and a rubber floating ring, and adopts a structure opened at the bottom, and the empty-bottom water collecting bucket is directly contacted with seawater, is a main seawater inlet channel and has functions of water volume exchange and filter residue discharge. The device is mainly applied to solar-powered seawater desalination.

The invention discloses a method for comprehensively monitoring invasion of seawater into a sandstone aquifer. A resistivity method (a high-density electrical method or a parallel electrical method),a resistivity logging method, a ground penetrating radar method or a seismic reflection method, a hydrogeochemical method, a sampling test method and the like are integrated to monitor seawater invasion, and the problems that the resistivity method is inaccurate in positioning and a pure hydrochemical method is high in cost are solved. Meanwhile, seawater invasion positioning is more accurate andreliable.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, the apparatus including a pumping pipe having opposite open end portions, a first end portion of the opposite open end portions being positioned below a sea level and a second end portion being positioned below a seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pipe from the land, wherein seawater is filled in the pumping pipe, and the well includes a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

The invention provides a method for restoring coastal wetland vegetation. The method comprises a treatment method aiming at environmental pollution and protection measure for a coastal wetland. According to the method, the treatment method for environmental pollution and the protection measure for the wetland vegetation are provided aiming at two reasons for coastal wetland vegetation deterioration, organic pollution and heavy metal pollution in the wetland are reduced through microorganisms during treatment of environmental pollution, and water quality improving plants are planted at the earlier stage to purify water; the protection measure of the coastal vegetation mainly aims at fundamentally preventing human factors from destroying wetland balance, wetland protection is enhanced, tidalinlets are built, and sand carried by tide and seawater intrusion are prevented from influencing vegetation growth.

The invention discloses an aquifer experiment simulating device. The device comprises a saltwater tank, a sand tank and a pressure-bearing cover plate, wherein the saltwater tank is communicated withthe sand tank; the saltwater tank and the sand tank are connected with the pressure-bearing cover plate to form a relatively closed pressure environment to simulate a confined aquifer; and a non-confined aquifer can be simulated when the pressure-bearing cover plate is removed. The device has the beneficial effects that a plurality of water/gas injection holes for water/gas injection are formed inthe side face of a sand filling area in the middle of the sand tank to solve the problem that the effects of various seawater intrusion treating methods cannot be simulated in the prior art; a saltwater area of the sand tank is directly connected with the large-volume saltwater tank to solve the problem that the saltwater concentration is unstable when the aquifer of a coastal zone is simulated in the prior art; in addition, the whole process of saltwater intrusion can be directly observed and recorded by the device to meet the various requirements of physical model experiments for seawater intrusion research; and the device is reasonable in structure, reliable in performance, simple and convenient to operate and strong in comprehensiveness.

The invention discloses a cohesive soil curing agent and a cohesive soil soft foundation treating method thereof, and belongs to the technical field of foundation (roadbed) treatment in building construction. Being composed of waste steel slag generated by industrial steelmaking and quick lime, the cohesive soil curing agent is low in manufacturing cost, environmentally friendly, capable of being used for treating cohesive soil different in moisture content and good in effect, achieves the effect of turning waste into wealth, solves the problems that at present, the reinforcement effect on salinized soil of saltwater intrusion regions and cohesive soil containing organic matter is poor in civil engineering construction, and has remarkable social benefits and economic benefits, wherein the organic content of the cohesive soil is smaller than or equal to 150 g/kg (15).

The invention discloses a spiral electrode resistivity probe rod based on an electrical method and a monitoring method thereof; the spiral electrode resistivity probe rod comprises a spiral probe rod,an electrode recovery device and a penetration device; the penetration device is used for assisting the spiral probe rod to rotate and penetrate into soil, and the electrode recovery device is used for recovering a spiral electrode into an annular electrode closed in a measurement state. According to the probe rod structure design provided by the scheme, after a soil sampler is drilled, manual screwing into soil can be realized through the thread type electrode design; after penetration of the probe rod is completed, the spiral electrode is converted into annular electrodes distributed at equal intervals through an electrode recovery device of the probe rod, long-term in-situ observation is completed, the time and cost of equipment installation are greatly reduced through the design of the device, and the installation efficiency is improved; the resistivity gradient of the soil can be truly reflected, the further development of a soil in-situ monitoring technology is promoted, and necessary technical and data support is provided for researching an evolution mechanism of seawater invasion and soil salinization and disaster prevention and control.

The invention provides a variable-permeability underground curtain for preventing seawater invasion and terrestrial source pollution and a construction method thereof, and the construction method comprises the following steps: determining a related area according to hydrogeological conditions of a coastal area; according to the seawater intrusion range, the position, 1/3 away from the coastline, of seawater intrusion serves as the variable-permeability underground curtain construction position; the upper portion of the variable-permeability underground curtain is of a waterproof wall structure, and the lower portion of the variable-permeability underground curtain is of a permeable wall structure. According to the technical scheme, seawater invasion can be prevented and controlled, and the underground fresh water resource quantity is increased; meanwhile, pollutant enrichment of an upstream underground water source is reduced, so that the quality of underground water in a coastal area is improved, and the discharge flux of underground fresh water is increased.

The invention provides a governing system for underground water subjected to seawater intrusion, and a construction method of the governing system. According to the conditions of geology, topography,an underground quaternary aquifer and the natural slope of the aquifer from the upstream part of an underground water area to a seawater intrusion water inlet section, a seawater-preventing dike is constructed at a seawater intrusion water inlet, and a plurality of automatic opening-closing valves are distributed on the seawater-preventing dike; and under the condition of the seawater normal waterlevel elevation or tidal wind wave water level elevation, the seawater-preventing dike can thoroughly block a seawater intrusion water inlet channel, thus seawater cannot invade the inner side of theseawater-preventing dike in an intrusion mode, and water on the inner side of the seawater-preventing dike utilizes natural hydraulic kinetic energy generated by upstream underground water of the underground water area through the downstream slope to break through valve plates of the automatic opening-closing valves to be discharged. According to the governing system, the self-cleaning function of a seawater intrusion area is achieved, thus the governing problem of the seawater intrusion area is solved, ecological self-restoration is achieved, the environment is protected, and the cost is saved.

The invention belongs to the technical filed of corrosion prevention of a seawater pipeline of a nuclear power plant, and particularly relates to a novel auxiliary anode fixing device. According to the device, an L-shaped sleeve is connected with an auxiliary anode, and a sealing ring is arranged between the sleeve and the auxiliary anode; and the top end of the sleeve is fixedly connected with aflange, and provided with a sealing cover, so that the sealing of the sleeve is achieved. The outer wall of the sleeve of the device is coated with an anticorrosion coating, and the situation that thesleeve is corroded by seawater and broken, and consequently the auxiliary anode is failed can be avoided effectively. The novel auxiliary anode fixing device has the beneficial effects that the connection position between the sleeve and the anode is sealed through a silicone ring, and the situation that the sealing between the sleeve and the anode is untight due to threads can be avoided; seawater intrusion can be avoided effectively; the occurrence of the situation can be avoided by adopting a sleeve bracket; the upper part of the auxiliary anode is in atmospheric environment, and is in threaded connection with the flange through the sealing cover, so that the interior of the sleeve is in the sealed state; and water or other substances with corrosion property in environment are preventedfrom entering the sleeve.

The invention provides an underground curtain for preventing and controlling seawater invasion and purifying residual salt water and a construction method thereof, and the construction method comprises the following steps: determining seawater invasion, an underground aquifer and other related areas according to hydrogeological conditions of a coastal region; the combined underground curtain comprises two wall bodies which are distributed front and back in the water flow direction of underground water, a top suspension type wall body is located on one side of an inland underground aquifer, and a sunken type wall body is located on one side close to seawater. The sunken wall body is arranged at the bottom of the aquifer, and the lower part is embedded into the impermeable bedrock; the upper opening of the wall body is positioned between the local sea level and the 10% seawater salinity isoline of the salt water wedge; the upper suspension type wall body is arranged on the upper portion of the aquifer and is built from the earth surface, an opening is reserved in the bottom of the aquifer, and the bottom end of the upper suspension type wall body needs to be lower than the top end of the sunken type wall body; the distance between the upper suspension type wall body and the sunken type wall body is 1/5-4/5 of the height of the sunken type wall body; by means of the technical scheme, seawater invasion can be effectively prevented and treated, and residual salt water in the upstream underground water source after the underground curtain is built is removed.