CN217132684U - In-situ observation device for endogenous static release in shallow lake - Google Patents
In-situ observation device for endogenous static release in shallow lake Download PDFInfo
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- CN217132684U CN217132684U CN202220341897.4U CN202220341897U CN217132684U CN 217132684 U CN217132684 U CN 217132684U CN 202220341897 U CN202220341897 U CN 202220341897U CN 217132684 U CN217132684 U CN 217132684U
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Abstract
The utility model provides an endogenous static release's of shallow lake normal position observation device, including floating case, a plurality of membrane dialysis sample thief and dispenser, it passes through the cable connection with adjustable length to float case and dispenser, and is a plurality of membrane dialysis sample thief is fixed on the dispenser, and membrane dialysis sample thief is equipped with a plurality of mutual separated's dialysis in the vertical direction and gathers the cell be fixed with two wireless dip angle detectors that are arranged in impressing the balancing weight and the symmetry setting of membrane dialysis sample thief in the deposit on the dispenser. The utility model discloses an original position observation device of endogenous static release in shallow lake can survey sediment pore water and overlying water concentration gradient and synchronous water quality parameter in shallow lake normal position, guarantees that the observation condition is real environmental condition.
Description
Technical Field
The utility model belongs to the technical field of geography and environmental science, especially, relate to an original position observation device of endogenous static release in shallow lake.
Background
The problem of lake eutrophication is increasingly serious under the background of global climate change. Shallow lakes, which are typical lake types in the middle and lower reaches of the Yangtze river in China, are more prone to eutrophication and more difficult to recover from a eutrophic state to a poor state than deep lakes due to the presence of a large amount of endogenous load. The determination of the amount of endogenous load is therefore particularly important in the study and management of shallow lakes.
The endogenous load of the shallow lake is generated simultaneously by two modes of sediment static release and disturbance release. The concentration of nutrient salts such as nitrogen, phosphorus and the like in the pore water of the sediment is higher than that of overlying water of the sediment, so that continuous gradient diffusion is formed at the water-soil interface, and the release is static. Disturbance release is the release of nutrient salts in the sediment interstitial water and sediment particles into the overburden water of the sediment during resuspension of the sediment under the influence of wind, lake currents or waves. The re-suspension process of disturbance release is intermittent and occurs when the shear stress on the deposit exceeds a threshold.
The observation of the endogenous load in shallow lakes is usually made for only one of static and turbulent release. The previous observation of static release mainly comprises an indoor static release simulation method, an indoor water-soil interface concentration gradient method and an underwater in-situ simulation method. The indoor static release simulation method is characterized in that a sediment columnar core sample is placed in a laboratory, the change of the concentration of nutrients in the overlying water along with time is continuously monitored, and the endogenous load is estimated; the indoor water-soil interface concentration gradient method is also used for collecting a sediment columnar core sample to a laboratory, sediment pore water at different depths is collected by a separation or dialysis method, the concentration of nutrient salt is measured, the vertical distribution of the concentration of the nutrient salt is obtained, and the static diffusion flux of the nutrient salt on the water-soil interface is calculated by Fick law; the underwater in-situ simulation method is mainly used for deep water areas such as gulf and the like with small disturbance and is difficult to implement under the condition that the shallow lake is frequently disturbed by wind waves.
The prior lake endogenous static release observation method mainly takes ectopic observation under a laboratory environment as a main part and cannot restore the real environmental condition; the traditional in-situ observation method needs a standing condition with low disturbance and cannot be applied to shallow lakes.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model discloses an original position observation device of endogenous static release in shallow lake can survey endogenous load's static release and synchronous quality of water parameter in shallow lake.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides an endogenous static release's of shallow lake normal position observation device, includes floats case, a plurality of membrane dialysis sample thief and dispenser, it connects to float the case and dispenser, and is a plurality of membrane dialysis sample thief is fixed on the dispenser, and membrane dialysis sample thief is equipped with a plurality of dialysis collection cells of mutual separation in the vertical direction be fixed with on the dispenser and be used for the balancing weight and the two wireless dip detectors of symmetry setting that are arranged in impressing the membrane dialysis sample thief into the deposit.
Furthermore, the dispenser is in a spool shape and comprises an upper fixed circular ring sheet, a cylindrical barrel and a lower fixed circular sheet which are sequentially arranged from top to bottom, a plurality of membrane dialysis sampler fixing holes are uniformly distributed on the lower fixed circular sheet along the circumferential direction of the lower fixed circular sheet, the membrane dialysis sampler fixing holes are positioned outside the cylindrical barrel, the lower end of the membrane dialysis sampler penetrates through the membrane dialysis sampler fixing holes, and the upper end of the membrane dialysis sampler is detachably connected with the lower end surface of the upper fixed circular ring sheet; and the two wireless inclination angle detectors are symmetrically fixed on the upper end surface of the upper fixed circular ring piece.
Further, go up the lower terminal surface of fixed ring piece and go up and have a plurality of downwardly extending's fixed block, it is a plurality of along its circumference equipartition on the fixed ring piece the fixed block sets up with a plurality of membrane dialysis sample thief fixed orificess relatively, is equipped with the slot on the lower terminal surface of fixed block, is equipped with the fixed orifices that runs through the slot on the fixed block, is fixed with the picture peg on the up end of membrane dialysis sample thief, is equipped with the screw on the picture peg, and the picture peg is inserted and is established in the slot, and the membrane dialysis sample thief can be dismantled with last fixed ring piece through the screw rod of wearing to establish fixed orifices and screw and be connected.
Furthermore, a balancing weight sleeve-mounted column positioned in the cylindrical barrel is arranged on the upper end face of the lower fixing wafer, the balancing weight is arranged on the balancing weight sleeve-mounted column, a connecting column is fixed on the upper end face of the balancing weight sleeve-mounted column, and a hanging ring is arranged at the upper end of the connecting column.
Further, go up four fixed slots of periphery side equipartition of fixed ring piece, four be fixed with fixed turbidity sensor, dissolved oxygen concentration sensor, pH sensor and temperature detection sensor on the fixed slot respectively float incasement and be equipped with control box and battery, control box and battery electric connection, fixed turbidity sensor, dissolved oxygen concentration sensor, pH sensor and temperature detection sensor pass through cable electric connection with the control box, and the cable is worn to establish rings and is connected with the control box.
Furthermore, the periphery of the upper fixed ring piece is connected with a plurality of ropes, the ropes are uniformly distributed on the upper fixed ring piece, and the other ends of the ropes are fixedly connected with the lifting rings.
Furthermore, a plurality of fixing needles are fixed on the dispenser, the upper ends of the plurality of fixing needles are fixedly connected with the upper fixing circular ring piece, the lower ends of the plurality of fixing needles penetrate through the lower fixing circular ring piece, and the lower ends of the plurality of fixing needles and the lower end surface of the membrane dialysis sampler are positioned in the same plane; and a plurality of through holes are uniformly distributed on the upper fixed circular ring piece and the lower fixed circular ring piece.
Further, a plurality of the fixed needles are respectively positioned between two adjacent membrane dialysis samplers.
Furthermore, an anchor is connected to the lower end face of the floating box through a rope.
The in-situ observation device for the endogenous static release in the shallow lake is suitable for the shallow lake and does not need underwater operation; a plurality of membrane dialysis samplers can be put in at the same time, whether the putting device is in a horizontal position or not is judged through a wireless inclination detector, the putting device is adjusted to the horizontal position through ropes, the depth of all the membrane dialysis samplers inserted into sediments is the same, and the water-soil interfaces are guaranteed to be clear and uniform; the membrane dialysis sampler is provided with a plurality of dialysis collecting cells which are separated from each other in the vertical direction, so that water samples with different heights can be collected, and the concentration gradient measurement is more accurate; the fixing needle fixes the dispenser at the dispensing position, the protective film dialysis sampler is free from disturbance of water flow and wind wave, and the protective film dialysis sampler is free from disturbance of wind wave and water flow after dispensing; in-situ observation is carried out on the concentration gradient of the sediment pore water and the overlying water, so that the observation condition is guaranteed to be a real environment condition; the through hole can ensure that water flow passes through the dispenser during dispensing so as to ensure the sinking stability of the dispenser.
The utility model discloses an in situ observation method of endogenous static release in shallow lake is fixed in the dispenser normal position with the membrane dialysis sample thief and puts in to the deposit, makes the cell of every 0.5cm layering of membrane dialysis sample thief vertical direction and deposit pore water and upper cover water reach concentration balance under furthest keeps the normal position ambient condition, will put in the dispenser and take out with the membrane dialysis sample thief after treating that the dialysis reaches balance, survey NH4 + 、NO3 - 、NO2 - 、PO4 3- 、Fe 2+ Plasma concentration, calculating the static release flux of the ions at the water-soil interface by Fick diffusion law; meanwhile, the sensors connected to the sampler synchronously obtain water physicochemical parameters such as turbidity, dissolved oxygen concentration, pH, temperature and the like so as to analyze influence factors of endogenous static release flux change.
Drawings
FIG. 1 is a schematic overall view of the in-situ observation device for the endogenous static release in shallow lakes according to the present invention;
fig. 2 is a three-dimensional structure diagram of the dispenser according to the present invention;
FIG. 3 is a top view of a dispenser according to the invention;
fig. 4 is a bottom view of the dispenser according to the present invention.
The device comprises a 1-lifting ring, a 2-dispenser, a 3-wireless inclination detector, a 4-counterweight, a 5-through hole, a 6-fixing needle, a 7-screw, an 8-membrane dialysis sampler, a 9-rope, a 10-turbidity sensor, a 11-floating box, a 12-control box, a 13-battery, a 14-anchor, a 15-cable, a 16-dissolved oxygen concentration sensor, a 17-pH sensor, a 18-temperature detection sensor, a 21-upper fixing circular ring sheet, a 22-cylindrical cylinder, a 23-lower fixing circular sheet, a 24-counterweight block sleeved column, a 25-connecting column, a 211-fixing block and a 231-membrane dialysis sampler fixing hole.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, an in-situ observation device for endogenous static release in a shallow lake comprises a floating box 11, a plurality of membrane dialysis samplers 8 and a dispenser, wherein the floating box 11 is connected with the dispenser 2, an anchor 14 is connected to the lower end face of the floating box 11 through a rope, the membrane dialysis samplers 8 are fixed on the dispenser 2, the membrane dialysis samplers 8 are provided with a plurality of dialysis collection cells which are separated from each other in the vertical direction, and a clump weight 4 for pressing the membrane dialysis samplers 8 into sediments and two symmetrically arranged wireless dip angle detectors 3 are fixed on the dispenser 2; the dispenser 2 is in a spool shape and comprises an upper fixed circular ring piece 21, a cylindrical barrel 22 and a lower fixed circular piece 23 which are sequentially arranged from top to bottom, a plurality of membrane dialysis sampler fixing holes 231 are uniformly distributed on the lower fixing wafer 23 along the circumferential direction, the plurality of membrane dialysis sampler fixing holes 231 are positioned outside the cylindrical barrel 22, the lower end of the membrane dialysis sampler 8 is penetrated by the membrane dialysis sampler fixing holes 231, a plurality of fixing blocks 211 extending downwards are uniformly distributed on the lower end surface of the upper fixing ring piece 21 along the circumferential direction, the plurality of fixing blocks 211 are arranged opposite to the plurality of fixing holes 231 of the membrane dialysis sampler, the lower end surface of the fixed block 211 is provided with a slot, the fixed block is provided with a fixed hole which penetrates through the slot, an inserting plate is fixed on the upper end face of the membrane dialysis sampler, a screw hole is formed in the inserting plate, the inserting plate is inserted into the inserting groove, and the membrane dialysis sampler 8 is detachably connected with an upper fixing circular ring piece 21 through a screw 7 penetrating through a fixing hole and the screw hole; the two wireless inclination angle detectors 3 are symmetrically fixed on the upper end surface of the upper fixed circular ring piece 21; a balancing weight sleeving column 24 positioned in the cylindrical barrel 23 is arranged on the upper end face of the lower fixing wafer 22, the balancing weight 4 is arranged on the balancing weight sleeving column 24, a connecting column 25 is fixed on the upper end face of the balancing weight 4 sleeving column 24, and a hanging ring 1 is arranged at the upper end of the connecting column 25; four fixing grooves are uniformly distributed on the outer peripheral side of the upper fixing circular ring piece 21, a fixed turbidity sensor 10, a dissolved oxygen concentration sensor 16, a pH sensor 17 and a temperature detection sensor 18 are respectively fixed on the four fixing grooves, a control box 12 and a battery 13 are arranged in the floating box 11, the control box 12 is electrically connected with the battery 13, the fixed turbidity sensor 10, the dissolved oxygen concentration sensor 16, the pH sensor 17 and the temperature detection sensor 18 are electrically connected with the control box 12 through a cable 15, and the cable 15 penetrates through the lifting ring 1 to be connected with the control box; a plurality of ropes 9 are connected to the peripheral side of the upper fixed circular ring piece 21, the plurality of ropes 9 are uniformly distributed on the upper fixed circular ring piece 21, and the other ends of the ropes are fixedly connected with the hanging ring 1; three fixing needles 6 are fixed on the dispenser 2, the upper ends of the three fixing needles 6 are fixedly connected with an upper fixing circular ring piece 21, a lower fixing circular piece 23 penetrates through the lower end of the three fixing needles 6, the lower ends of the three fixing needles and the lower end surface of the membrane dialysis sampler 8 are positioned in the same plane, and the three fixing needles 6 are respectively positioned between two adjacent membrane dialysis samplers 8; a plurality of through holes 5 are uniformly distributed on the upper fixed circular ring piece 21 and the lower fixed circular piece 22.
The observation method of the in-situ observation device for the endogenous static release of the shallow lake comprises the following steps:
s1, fixing the membrane dialysis sampler 8 on the dispenser 2, adjusting the weight of the balancing weight 4, then slowly sinking the dispenser to the lake bottom sediment to enable the membrane dialysis sampler 8 below the lower fixed wafer to be inserted into the sediment, and meanwhile ensuring that the dispenser is not sunk into the sediment;
s2, judging whether the dispenser is in a horizontal position or not by observing the wireless inclination angle detector 3, and if not, adjusting the dispenser 2 to the horizontal position through the rope 9;
s3, throwing the anchor 14 into the sediment at a certain distance from the dispenser 2, and then placing the floating box 11 on the lake surface;
s4, after 24-72 h of putting, taking out the putting device 2, and reading the stored water physicochemical parameters from the control box 12; recording the water-soil interface position when the membrane dialysis sampler 8 is taken out from the dispenser 2, slightly wiping a large amount of soil or sediments on the surface of the membrane dialysis sampler 8 by using wet filter paper, and then removing the film on the outermost layer to ensure that the filter membrane is clean and has no mud; s5, the cleaned membrane dialysis sampler 8 is horizontally placed on a clean table top, covered with a layer of clean preservative film, samples in the dialysis collection chamber are sequentially taken out and loaded into a sealed centrifuge tube (about 0.4ml of samples can be collected) from top to bottom by a pipette gun, and the samples are stored by acid or other reagents, refrigerated or frozen;
and S6, measuring the sample to obtain the vertical distribution of the ion concentration, fitting an exponential curve of the concentration distribution to obtain the concentration gradient of the water-soil interface, and calculating the endogenous static release flux according to the Fick law.
The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention should be regarded as the protection scope of the present invention for those skilled in the art.
Claims (8)
1. The in-situ observation device for endogenous static release in shallow lakes is characterized by comprising a floating box, a plurality of membrane dialysis samplers and a dispenser, wherein the floating box is connected with the dispenser, the membrane dialysis samplers are fixed on the dispenser, a plurality of dialysis collection cells which are separated from each other are arranged in the vertical direction of the membrane dialysis samplers, and a balancing weight used for pressing the membrane dialysis samplers into sediments and two wireless dip angle detectors which are symmetrically arranged are fixed on the dispenser.
2. The in-situ observation device for the endogenous static release in a shallow lake according to claim 1, wherein the dispenser is in the shape of an I-shaped wheel and comprises an upper fixed circular ring piece, a cylindrical barrel and a lower fixed circular piece which are sequentially arranged from top to bottom, a plurality of membrane dialysis sampler fixing holes are uniformly distributed on the lower fixed circular piece along the circumferential direction of the lower fixed circular piece, the membrane dialysis sampler fixing holes are positioned outside the cylindrical barrel, the lower end of the membrane dialysis sampler penetrates through the membrane dialysis sampler fixing holes, and the upper end of the membrane dialysis sampler is detachably connected with the lower end surface of the upper fixed circular ring piece; and the two wireless inclination angle detectors are symmetrically fixed on the upper end surface of the upper fixed circular ring piece.
3. The in-situ observation device for the endogenous static release in shallow lakes according to claim 2, which is characterized in that a plurality of downwardly extending fixed blocks are uniformly distributed on the lower end surface of the upper fixed ring piece along the circumferential direction of the upper fixed ring piece, the fixed blocks are arranged opposite to the fixed holes of the plurality of membrane dialysis samplers, slots are arranged on the lower end surface of each fixed block, fixed holes penetrating through the slots are formed in the fixed blocks, an inserting plate is fixed on the upper end surface of each membrane dialysis sampler, screw holes are formed in the inserting plate, the inserting plate is inserted into the slots, and the membrane dialysis samplers are detachably connected with the upper fixed ring piece through screws penetrating through the fixed holes and the screw holes.
4. The in-situ observation device for the endogenous static release in a shallow lake according to claim 2, wherein a counter weight block sleeving column positioned in the cylindrical barrel is arranged on the upper end surface of the lower fixing wafer, the counter weight block is arranged on the counter weight block sleeving column, a connecting column is fixed on the upper end surface of the counter weight block sleeving column, and a hanging ring is arranged at the upper end of the connecting column.
5. The in-situ observation device for the endogenous static release in shallow lakes according to claim 2, wherein four fixing grooves are uniformly distributed on the periphery of the upper fixing ring piece, a fixed turbidity sensor, a dissolved oxygen concentration sensor, a pH sensor and a temperature detection sensor are respectively fixed on the four fixing grooves, a control box and a battery are arranged in the floating box, the control box is electrically connected with the battery, the fixed turbidity sensor, the dissolved oxygen concentration sensor, the pH sensor and the temperature detection sensor are electrically connected with the control box through cables, and the cables are connected with the control box through hanging rings.
6. The in-situ observation device for the endogenous static release in a shallow lake according to claim 4, wherein a plurality of ropes are connected to the periphery of the upper fixed ring piece, the plurality of ropes are uniformly distributed on the upper fixed ring piece, and the other end of each rope is fixedly connected with the hanging ring.
7. The in-situ observation device for the endogenous static release in a shallow lake according to claim 2, wherein a plurality of fixing pins are fixed on the dispenser, the upper ends of the plurality of fixing pins are fixedly connected with an upper fixing ring piece, the lower ends of the plurality of fixing pins are penetrated by a lower fixing ring piece, and the lower ends of the plurality of fixing pins and the lower end surface of the membrane dialysis sampler are positioned in the same plane; and a plurality of through holes are uniformly distributed on the upper fixed circular ring piece and the lower fixed circular ring piece.
8. The in-situ observation device for the endogenous static release in shallow lakes according to claim 7, wherein a plurality of said fixed needles are respectively located between two adjacent membrane dialysis samplers.
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| CN202220341897.4U CN217132684U (en) | 2022-02-18 | 2022-02-18 | In-situ observation device for endogenous static release in shallow lake |
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| CN202220341897.4U CN217132684U (en) | 2022-02-18 | 2022-02-18 | In-situ observation device for endogenous static release in shallow lake |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980288A (en) * | 2022-12-16 | 2023-04-18 | 华南理工大学 | Layered in-situ monitoring device for water quality and sediment dissolved oxygen in tidal river network area |
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- 2022-02-18 CN CN202220341897.4U patent/CN217132684U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980288A (en) * | 2022-12-16 | 2023-04-18 | 华南理工大学 | Layered in-situ monitoring device for water quality and sediment dissolved oxygen in tidal river network area |
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