CN102590469A - Flat plate tracing simulating device system and simulating method for salt water intrusion under tidal action - Google Patents

Flat plate tracing simulating device system and simulating method for salt water intrusion under tidal action Download PDF

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Publication number
CN102590469A
CN102590469A CN2012100124471A CN201210012447A CN102590469A CN 102590469 A CN102590469 A CN 102590469A CN 2012100124471 A CN2012100124471 A CN 2012100124471A CN 201210012447 A CN201210012447 A CN 201210012447A CN 102590469 A CN102590469 A CN 102590469A
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water
salt
stereotyped
dull
tank
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CN102590469B (en
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金光球
关伟强
赵忠伟
丁海波
李凌
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Hohai University HHU
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Hohai University HHU
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Abstract

The invention discloses a flat plate tracing simulating device system for salt water intrusion under tidal action. The flat plate tracing simulating device system comprises a flat plate water channel, a tidal wave generator, a salt water reservoir, a fresh water tank and a salt water tank, wherein the flat plate water channel is provided with a fresh water area, a sediment area and a salt water area along the length direction; the sediment area is filled with sediment and provided with 5-6 sample discharging-taking holes; the fresh water area, the sediment area and the salt water area are spaced by a filtering net and a water permeable inserting plate respectively; the tidal wave generator is arranged between the salt water area of the flat plate channel and the salt water reservoir; the fresh water tank is connected with the fresh water area of the flat plate water channel through a flowrate regulating device and used for injecting fresh water to the fresh water area; and the salt water tank is connected with the salt water area of the flat plate water channel through another flowrate regulating device and is used for injecting salt water to the salt water area. The full process of salt water intrusion under tidal action can be visually viewed through the device, so that the purpose of deeply exploring the mechanism of sea water intrusion is achieved.

Description

The dull and stereotyped spike analogue means system and the analogy method of salt water encroachment under the tidal action
Technical field
The present invention relates to a kind of experimental simulation device, relate in particular to the dull and stereotyped spike analogue means system of salt water encroachment under a kind of tidal action, the invention still further relates to the dull and stereotyped spike analogy method of salt water encroachment under a kind of tidal action.
Background technology
Salt water encroachment is the major issue that the coastal cities industrial and agricultural development faces, and especially at northern area, the excessive underground water of taking out has caused large-area salt water encroachment, has had a strong impact on local people's life and expanding economy.Simultaneously, salt water encroachment also produces material impact to the ecologic environment of coastland, causes the salinization of soil of large tracts of land soil, and original limnobios group is also progressively to the transition of halobios group.Along with the further aggravation of salt water encroachment, society and environmental problem that it causes are on the rise, and progressively cause people's attention, also have increasing research to begin to pay close attention to this field.
Control salt water encroachment at first will be understood the mechanism of salt water encroachment, grasps the present situation of salt water encroachment, accurately predicts the development trend of salt water encroachment.Research to the salt water encroachment problem mainly relies on numerical simulation and two kinds of means of physical simulation; Numerical simulation be on the basis of accurately understanding invasion mechanism, utilize mathematical model describe research objects such as salt solute concentration, pressure distributions in the water-bearing zone in time with the situation of change in space, physical simulation is meant through field or laboratory experiment imitation salt water encroachment phenomenon and explores the invasion rule.At present, existing mathematical model still can not well be described the salt water encroachment phenomenon, to the consideration tidal action time, therefore, is the inevitable choice of salt water encroachment research by means of physical model experiment simulation invasion effect particularly.
Receive the restriction of experiment condition and cost, existing salt water encroachment experimental simulation mainly adopts indoor model.Owing to simplify studying a question, the most experiments model is not considered tidal action, and the tidal action of research proof has material impact to analog result, so these experimental simulations result's reference value is had a greatly reduced quality; Because NaCl dissolved dilution process can't with the naked eye be differentiated, adopt the probe monitoring not only can improve experimental cost greatly, and the experiment operability is not high, the visual difficult problem that exists of experimentation.Owing to there are problems, adopt the experimental study of indoor model simulation salt water encroachment still rare, have the purpose that circumscribed numerical model can't reach further investigation seawater intrusion mechanism and only adopt.
Summary of the invention
Goal of the invention: the objective of the invention is to the deficiency to prior art, a kind of dull and stereotyped spike analogue means system that can intuitively see salt water encroachment under the tidal action is provided.
Another object of the present invention is to provide the dull and stereotyped spike analogy method of salt water encroachment under a kind of tidal action.
The 3rd purpose of the present invention is to provide a kind of method of utilizing described dull and stereotyped spike analogue means to carry out the pollutants transfer spike.
Technical scheme: the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action of the present invention; Comprise dull and stereotyped tank, tidal wave maker, salt reservoir, fresh-water tank and brine tank; Said dull and stereotyped tank sets gradually along its length and is fresh water district, silt district and salt pool; Said silt is filled with silt in the district, and is provided with 5~6 row's thief holes; Pass through filter screen and permeable plate respectively at interval between said fresh water district, silt district and the salt pool; Said tidal wave maker is arranged between the salt pool and said salt reservoir of said dull and stereotyped tank, is used for the salt solution of said salt reservoir is injected said salt pool with the form of morning and evening tides; Said fresh-water tank is connected with the fresh water district of said dull and stereotyped tank through flow regulator, is used for fresh water is injected into said fresh water district; Said brine tank is connected with the salt pool of said dull and stereotyped tank through flow regulator, is used for saltwater replenishment to said salt pool.
For the ease of the acquisition test result, said dull and stereotyped spike analogue means is arranged in the space of light sealing, also comprises illuminator, camera system and white background curtain; Said illuminator is arranged in the space of said light sealing and is used to provide light source; Said camera system is arranged on the dead ahead of said dull and stereotyped spike analogue means, is used to take process of the test and result; Said white background curtain is arranged on the dead astern of said dull and stereotyped spike analogue means as the shooting environmental background colour.
Said camera system is two and is separately positioned on distance said dull and stereotyped spike analogue means same distance, equal angular place with the camera of brand with style, has 1/3rd places overlapping in the finding a view of two cameras; At the camera lay down location, the black curtain is set, camera lens is leant out from the black curtain.
For the ease of the research of two dimension, ignore the influence that silt is invaded aspect thickness, the thickness of said dull and stereotyped tank is 1~3cm.
Further, the height of said dull and stereotyped tank is 80cm; The length in fresh water district is 5cm; The length in silt district is 340cm, and the silt height in silt district is 65cm; The length in salt pool is 5cm.
The dull and stereotyped spike analogy method of salt water encroachment comprises the steps: under the tidal action of the present invention
(1) uses NaCl and FD&C red 40 mixed solutions, pack in brine tank and the salt reservoir as seawater; In dull and stereotyped tank, add deionized water and silt;
(2) open the fresh-water tank water valve, be adjusted to needed flow; Open the tidal wave maker salt solution in the salt reservoir is injected the salt pool with the form of morning and evening tides, it is constant with the salinity that keeps salt pool salt water boundaries to open the additional salt solution of brine tank injection; Regularly in the salt reservoir, add the salt solution of high concentration, make it reach initial seawater salinity; Simultaneously, open camera and regularly take pictures, and regularly from thief hole, take a sample;
(3) salt solution in salt pool treats that to invasion of silt district and formation salt wedge salt wedge stops test when becoming constant.
Also can utilize apparatus of the present invention to carry out pollutants transfer spike simulation, the method for utilizing the dull and stereotyped spike analogue means of the present invention to carry out the pollutants transfer spike comprises the steps:
(1) in dull and stereotyped tank, adds deionized water and silt; The deionized water of in brine tank and fresh-water tank, packing into;
(2) water valve of unlatching brine tank and fresh-water tank, the height of the fresh water district on adjustment both sides and the overflow vent in salt pool makes the water level on both sides that certain water-head arranged, and according to Darcy's law, in tank, forms evenly single current;
(3) inlet through dull and stereotyped tank injects solubility pollutant or the colloid that has color in the silt district, opens camera BR pollutant migration course simultaneously;
(4) etc. pollutant moves away fully, stops experiment.
Beneficial effect: apparatus of the present invention are mainly used in flowing and the solute transfer process of the research water-bearing zone degree of depth and vertical shore line direction, are two dimensional model not considering on the basis that the along the coastline direction flows model simplification.Device adopts the organic glass wall on vertical plane, shore line, the effect of visualization of outstanding whole experiment, and adopt angle steel fixedly to prevent distortion; Device left side (landlocked direction) adopts fresh-water tank to inject firm discharge fresh water, is used for describing fixedly fresh-water flow border, makes the fresh water outflow avoid the tidal action influence; Device right side (sea is to the border) is provided with 1 salt reservoir and 1 brine tank; The employing capacity is the brine tank of 60L when not considering tidal action; Salt water encroachment situation under the simulation mean sea level effect, the employing capacity is that the salt solution Cooley of 80L is simulated the salt water encroachment rule under the different tide amplitude effects with the tidal wave maker when considering tidal action; Through the absorption test, device adopts FD&C red 40 and the seawater intrusion of NaCl solutions simulate, can guarantee that the tracer agent total amount does not decay in the experimentation; Adopt the every 15s of high-definition digital camera to gather and once test photo, guarantee the change procedure of omnidistance record salt water encroachment.Apparatus of the present invention can intuitively be seen the overall process of salt water encroachment under the tidal action, reach the purpose of further investigation seawater intrusion mechanism.
Description of drawings
Fig. 1 is apparatus of the present invention structural representation.
Fig. 2 is apparatus of the present invention and camera system layout.
Fig. 3 is the figure as a result of salt water encroachment under the different experimental conditions in the embodiment of the invention.
The interface that Fig. 4 separates for numerical simulation, experiment and Glover in the embodiment of the invention is comparison diagram as a result.Solid line is a numerical solution; Diamond spot is an experimental result; Dotted line is that Glover separates.
Embodiment
Be elaborated in the face of technical scheme of the present invention down, but protection scope of the present invention is not limited to said embodiment.
Embodiment: the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action of the present invention; Comprise dull and stereotyped tank 1, tidal wave maker 2, salt reservoir 3, fresh-water tank 4 and brine tank 5; Said dull and stereotyped tank 1 sets gradually along its length and is fresh water district 1-1, silt district 1-2 and salt pool 1-3; Be filled with silt among the said silt district 1-2, and be provided with 5~6 row's thief holes, two pitchs of holes up and down of single row of holes are 1cm; Pass through filter screen and permeable plate respectively at interval between said fresh water district 1-1, silt district 1-2 and the salt pool 1-3; Said tidal wave maker 2 is arranged between the salt pool 1-3 and said salt reservoir 3 of said dull and stereotyped tank 1, is used for the salt solution of said salt reservoir 3 is injected said salt pool 1-3 with the form of morning and evening tides; Said fresh-water tank 4 is connected with the fresh water district 1-1 of said dull and stereotyped tank 1 through flow regulator, is used for fresh water is injected into said fresh water district 1-1; Said brine tank 5 is connected with the salt pool 1-3 of said dull and stereotyped tank 1 through flow regulator, is used for saltwater replenishment to said salt pool 1-3.
Said dull and stereotyped spike analogue means is arranged in the space of light sealing, also comprises illuminator 6, camera system 7 and white background curtain; Said illuminator 6 is arranged in the space of said light sealing and is used to provide light source; Said camera system 7 is arranged on the dead ahead of said dull and stereotyped spike analogue means, is used to take test findings; Said white background curtain is arranged on the dead astern of said dull and stereotyped spike analogue means as the shooting environmental background colour, avoids other environmental backgrounds in the laboratory to be photographed.
Simulation is omnidistance main to have color spike meter and simulates whole seawater intrusion through taking pictures, and the migration process that pollutes cloud cluster, and the 5-6 that is provided with overleaf row's thief hole.
In this experiment, illuminator 6 is used two row's illuminating lamps, and the front row is 5 electricity-saving lamps, and back row is 2 cumulative lamps; And the door and the window of enclosed experiment chamber, stop the irradiation of outdoor light (particularly sunshine), reduce or avoid light round the clock to change the variation of the aberration of taking pictures that causes.
For the whole tank of taking pictures, camera system 7 needs two and is separately positioned on apart from the tank same distance with the camera of brand with style, and equal angular is taken; For better connection, two cameras all have 1/3rd places overlapping; At the camera lay down location, place the black curtain, only make camera lens from the black curtain, lean out, can avoid the shadow of camera in tank, to manifest like this, influence shooting effect.
The thickness of said dull and stereotyped tank 1 is 1~3cm; The height of said dull and stereotyped tank 1 is 80cm; The length of fresh water district 1-1 is 5cm; The length of silt district 1-2 is 340cm, and the silt height of silt district 1-2 is 65cm; The length of salt pool 1-3 is 5cm.
For seawater intrusion, use NaCl and FD&C red 40 mixed solutions, as seawater; Be equipped with needed salinity with NaCl, add a spot of FD&C red 40 as the color tracer agent; Whole process from simulation seawater intrusion directly perceived; From the thief hole at the back side of tank, extract pore water simultaneously, dilute 250 times after its electricity of measurement lead, be converted into concentration according to graticule.Move in how empty medium for pollutant, select suitable the solubility pollutant or the colloid that have color, in the fresh water district or the silt district add tracer agent, through the transition process of image studies pollutant in how empty medium.
The dull and stereotyped spike analogy method of salt water encroachment comprises the steps under the tidal action, and concrete experiment condition and parameter are seen table 1:
(1) uses NaCl and FD&C red 40 mixed solutions, pack in brine tank and the salt reservoir as seawater; In dull and stereotyped tank, add deionized water and silt, the each 10cm of gaza height;
(2) open the fresh-water tank water valve, be adjusted to needed flow; Open the tidal wave maker salt solution in the salt reservoir is injected the salt pool with the form of morning and evening tides, it is constant with the salinity that keeps salt pool salt water boundaries to open the additional salt solution of brine tank (salinity of brine tank is initially the same with the salinity of salt reservoir) injection; Because the fresh water input is arranged in this system; Therefore under of the effect of the place on seawater border at density flow; Particularly the salinity of the top water surface on the right is on the low side, in order better to simulate border, ocean (density of sea water is generally more fixed), therefore adds the salt solution of equal initial density at an upper portion thereof.In the salt reservoir, added the salt of high concentration in per 1 hour, (this is because the fresh water input is arranged in the total system always, so the salinity of salt reservoir can descend to reach initial seawater salinity; Simultaneously, open camera and regularly take pictures, at interval 15s once and regularly takes a sample from thief hole, generally is initial very fast at interval, and slack-off gradually;
(3) salt solution in salt pool treats that to invasion of silt district and formation salt wedge salt wedge stops test when becoming constant.
Table 1 salt water encroachment experiment condition and parameter
The result of salt water encroachment sees Fig. 3 under the different experimental conditions.Fig. 4 is numerical simulation, experiment and the Glover interface of a separating comparison diagram as a result.Solid line is a numerical solution; Diamond spot is an experimental result; Dotted line is that Glover separates.
The method of utilizing dull and stereotyped spike analogue means of the present invention to carry out the pollutants transfer spike comprises the steps:
(1) in dull and stereotyped tank, adds deionized water and silt; The deionized water of in brine tank and fresh-water tank, packing into;
(2) water valve of unlatching brine tank and fresh-water tank, the height of the fresh water district on adjustment both sides and the overflow vent in salt pool makes the water level on both sides that certain water-head arranged, and according to Darcy's law, in tank, forms evenly single current;
(3) inlet through dull and stereotyped tank injects solubility pollutant or the colloid that has color in the silt district, opens camera BR pollutant migration course simultaneously;
(4) etc. pollutant moves away fully, stops experiment
As stated, although represented and explained the present invention that with reference to specific preferred embodiment it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the accompanying claims definition, can make various variations in form with on the details to it.

Claims (7)

1. the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action; It is characterized in that: comprise dull and stereotyped tank (1), tidal wave maker (2), salt reservoir (3), fresh-water tank (4) and brine tank (5); Said dull and stereotyped tank (1) sets gradually along its length and is fresh water district (1-1), silt district (1-2) and salt pool (1-3); Be filled with silt in the said silt district (1-2), and be provided with 5~6 row's thief holes; Pass through filter screen and permeable plate respectively at interval between said fresh water district (1-1), silt district (1-2) and salt pool (1-3); Said tidal wave maker (2) is arranged between the salt pool (1-3) and said salt reservoir (3) of said dull and stereotyped tank (1), is used for the salt solution of said salt reservoir (3) is injected said salt pool (1-3) with the form of morning and evening tides; Said fresh-water tank (4) is connected with the fresh water district (1-1) of said dull and stereotyped tank (1) through flow regulator, is used for fresh water is injected into said fresh water district (1-1); Said brine tank (5) is connected with the top, salt pool (1-3) of said dull and stereotyped tank (1) through flow regulator, is used for saltwater replenishment to said salt pool (1-3).
2. the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action according to claim 1; It is characterized in that: said dull and stereotyped spike analogue means is arranged in the space of light sealing, also comprises illuminator (6), camera system (7) and white background curtain; Said illuminator (6) is arranged in the space of said light sealing and is used to provide light source; Said camera system (7) is arranged on the dead ahead of said dull and stereotyped spike analogue means, is used to take process of the test and result; Said white background curtain is arranged on the dead astern of said dull and stereotyped spike analogue means as the shooting environmental background colour.
3. the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action according to claim 2; It is characterized in that: said camera system (7) be two with the camera of brand with style; Be separately positioned on distance said dull and stereotyped spike analogue means same distance, equal angular place, have 1/3rd places overlapping in the finding a view of two cameras; At the camera lay down location, the black curtain is set, camera lens is leant out from the black curtain.
4. the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action according to claim 1, it is characterized in that: the thickness of said dull and stereotyped tank (1) is 1~3cm.
5. the dull and stereotyped spike analogue means system of salt water encroachment under the tidal action according to claim 1, it is characterized in that: the height of said dull and stereotyped tank (1) is 80cm; The length in fresh water district (1-1) is 5cm; The length in silt district (1-2) is 340cm, and the silt height of silt district (1-2) is 65cm; The length in salt pool (1-3) is 5cm.
6. the dull and stereotyped spike analogy method of salt water encroachment under the tidal action is characterized in that comprising the steps:
(1) uses NaCl and FD&C red 40 mixed solutions, pack in brine tank and the salt reservoir as seawater; In dull and stereotyped tank, add deionized water and silt;
(2) open the fresh-water tank water valve, be adjusted to needed flow; Open the tidal wave maker salt solution in the salt reservoir is injected the salt pool with the form of morning and evening tides, it is constant with the salinity that keeps salt pool salt water boundaries to open the additional salt solution of brine tank injection; Regularly in the salt reservoir, add the salt solution of high concentration, make it reach initial seawater salinity; Simultaneously, open camera and regularly take pictures, and regularly from thief hole, take a sample;
(3) salt solution in salt pool treats that to invasion of silt district and formation salt wedge salt wedge stops test when becoming constant.
7. the method for utilizing the described dull and stereotyped spike analogue means of claim 1 to carry out the pollutants transfer spike is characterized in that comprising the steps:
(1) in dull and stereotyped tank, adds deionized water and silt; The deionized water of in brine tank and fresh-water tank, packing into;
(2) water valve of unlatching brine tank and fresh-water tank, the height of the fresh water district on adjustment both sides and the overflow vent in salt pool makes the water level on both sides that certain water-head arranged, and according to Darcy's law, in tank, forms evenly single current;
(3) inlet through dull and stereotyped tank injects solubility pollutant or the colloid that has color in the silt district, opens camera BR pollutant migration course simultaneously;
(4) etc. pollutant moves away fully, stops experiment.
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CN103558353A (en) * 2013-11-08 2014-02-05 天津科技大学 Device and method for simulating salinity and water volume exchanging between underground water and overlying water of water reservoir
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CN104614151A (en) * 2015-02-05 2015-05-13 中国地质大学(北京) Device and method for utilizing sand launder seepage to simulate coastal zone salt-fresh water abrupt interface
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CN103063811A (en) * 2013-01-04 2013-04-24 天津大学 Indoor simulation device for migration and conversion of pollutant in artificial shore zone
CN104820079A (en) * 2013-01-04 2015-08-05 天津大学 Application of well pipe to artificial bank zone pollutant migration and transformation indoor simulator
CN103063819A (en) * 2013-01-04 2013-04-24 天津大学 Application method of indoor simulation device for migration and conversion of pollutant in artificial shore zone
CN103558353A (en) * 2013-11-08 2014-02-05 天津科技大学 Device and method for simulating salinity and water volume exchanging between underground water and overlying water of water reservoir
CN103558353B (en) * 2013-11-08 2016-01-20 天津科技大学 Simulation reservoir underground water and overlying water salinity and water quality exchanges method
CN104006946A (en) * 2014-06-10 2014-08-27 珠江水利委员会珠江水利科学研究院 Layering tracing method for river mouth salt tide salt-fresh water density stratified flows
CN104297139B (en) * 2014-10-11 2016-08-31 河海大学 A kind of indoor tidal wave maker and using method thereof
CN104297139A (en) * 2014-10-11 2015-01-21 河海大学 Indoor tidal wave generator and using method thereof
CN104614151A (en) * 2015-02-05 2015-05-13 中国地质大学(北京) Device and method for utilizing sand launder seepage to simulate coastal zone salt-fresh water abrupt interface
CN104793249A (en) * 2015-04-22 2015-07-22 中国海洋大学 Method for systematically detecting seawater intrusion
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