CN111512933A - Air-entrapping drip irrigation system - Google Patents

Air-entrapping drip irrigation system Download PDF

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Publication number
CN111512933A
CN111512933A CN202010453474.7A CN202010453474A CN111512933A CN 111512933 A CN111512933 A CN 111512933A CN 202010453474 A CN202010453474 A CN 202010453474A CN 111512933 A CN111512933 A CN 111512933A
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drip irrigation
emitter
water tank
flow
water
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CN111512933B (en
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李�浩
马秋妍
曹引波
刘杨
孙秀路
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Farmland Irrigation Research Institute of CAAS
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Farmland Irrigation Research Institute of CAAS
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F7/00—Aeration of stretches of water
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Wood Science & Technology (AREA)
  • Botany (AREA)
  • Soil Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses an aerated drip irrigation system which comprises a header and an irrigator, wherein the header comprises a first water tank, a second water tank, a variable frequency pump, a filter, a valve and a pressure gauge; the positions of the first water tank and the second water tank close to the bottom are communicated through a water pipe; the irrigator comprises a plurality of groups of irrigation platforms, a plurality of drip irrigation belts are arranged on the groups of irrigation platforms, and a plurality of irrigation drippers are arranged on the drip irrigation belts; a drainage groove is arranged below the drip irrigation tape, the drainage groove is obliquely arranged, and the lower end of the drainage groove is connected with the first water tank; the blockage degree of the irrigator can be effectively relieved through air-entrapping treatment, the uniformity of the drip irrigation system is improved, and the service cycle of the irrigator and the drip irrigation system is prolonged.

Description

Air-entrapping drip irrigation system
Technical Field
The invention belongs to the field of drip irrigation, and particularly relates to an air-entrapping drip irrigation system.
Background
The drip irrigation technology is one of advanced modern water-saving irrigation technologies and has important significance for relieving water resource shortage. In addition to saving irrigation water, drip irrigation pipe networks can be used to transport fertilizer, gas and heat as a closed piping system, such as: drip irrigation water and fertilizer integration technology and the like. The air-entrapping drip irrigation technology is characterized in that oxygen is conveyed to a plant root zone by means of a drip irrigation system, so that the low-oxygen stress effect on crop roots during irrigation can be effectively relieved, the soil gas environment of the crop root zone is improved, the activity of soil enzymes is improved, the microbial community is influenced, the aerobic respiration and nutrient absorption of crop roots can be promoted, the water utilization efficiency is improved, the crop yield is increased, and the crop quality is improved.
At present, drip irrigation systems are mainly aerated by mechanical air (venturi tube, air compressor, etc.) and chemical air (peroxide, such as H2O 2). And the bubbles generated by different air-entrapping devices have obvious influence on the performance of the drip irrigation system. Research shows that because the size of the bubbles generated by the methods is large and is influenced by factors such as connector types, dripper flow, pipeline diameters, drip irrigation tape laying lengths and the like, the movement of the large bubbles in the drip irrigation system is unstable, and the bubbles are easy to fuse, break and escape, so that the bubbles are not uniformly distributed along the drip irrigation tape, thereby influencing the uniformity of the drip irrigation system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an air-entrapping drip irrigation system, irrigation water is subjected to air-entrapping treatment by adopting micro-nano bubbles, so that the blockage process of a drip irrigation emitter can be effectively relieved, and the service life of the drip irrigation system is prolonged; when the micro-nano bubbles are attached to the surface of an object, the friction resistance generated in the flowing process can be reduced, the flow speed in the flow channel of the irrigator is increased, the deposition of impurities in the flow channel of the irrigator is reduced, and the blockage of the irrigator is further reduced; the aeration treatment significantly increases the emitter life.
The invention provides the following technical scheme:
an aerated drip irrigation system comprises a header and an emitter, wherein the header comprises a first water tank, a second water tank, a variable frequency pump, a filter, a valve and a pressure gauge; the positions of the first water tank and the second water tank close to the bottom are communicated through a water pipe; the first water tank and the second water tank are provided with micro-nano bubble generators, and the micro-nano bubble generators are connected with the first water tank and the second water tank to provide micro-nano bubbles; a water delivery pipe is arranged in the second water tank and is connected with a drip irrigation belt of the irrigator, and a variable frequency pump, a filter, a valve and a pressure gauge are sequentially arranged on the water delivery pipe along the water flow direction; the irrigator comprises a plurality of groups of irrigation platforms, a plurality of drip irrigation belts are arranged on the groups of irrigation platforms, and a plurality of irrigation drippers are arranged on the drip irrigation belts; drip irrigation zone below is equipped with water drainage tank, water drainage tank slope sets up, and the low one end of water drainage tank is connected with first water tank.
Preferably, the dropper system further comprises emitter clogging degree monitoring; the monitoring process comprises the steps of enabling the emitter to stably run for 30 minutes under rated pressure, then sequentially placing rain gauges under the emitter at a monitoring point every 5 seconds, sequentially taking out the rain gauges 12 minutes later according to the placing sequence and time intervals, and then measuring the water quantity in the rain gauges by using the rain gauges.
Preferably, emitter clogging monitoring is expressed as a mean flow ratio Dar:
Figure BDA0002508411200000021
in the formula: q. q.siThe flow of the ith douche in the blockage monitoring process is expressed in the unit of L/h; q. q.snewThe average flow of the douche before the test is started, L/h; n is the number of the douches to be measured.
Preferably, the working pressure of the air-entrapping dropper system is stabilized at 0.1 MPa.
Preferably, the degree of emitter clogging is influenced by the factors of the duration of irrigation, the aeration treatment, the type of emitter and the rated flow rate of the emitter.
Preferably, the flow and pressure of the emitter satisfy the following relations:
qe＝kpm；
in the formula: q. q.seThe flow of the irrigation emitter is expressed in the unit of L/h; p is the working pressure in MPa; k is a flow coefficient; m is a flow state index; coefficient of variation, Cv, is calculated as:
Figure BDA0002508411200000023
in the formula: sq is the standard deviation of the flow of the irrigation emitter, and the unit is L/h;
Figure BDA0002508411200000022
is the average flow L/h of the douche.
Preferably, the emitter mean flow ratio Dra reflects the degree of emitter mean flow reduction, with smaller Dra indicating greater emitter mean flow attenuation and greater clogging; it is generally believed that clogging of the emitter occurs when Dra ≦ 75%.
Preferably, the drip irrigation system adopts a Leisinsen uniformity coefficient Cu and a statistical uniformity coefficient Us to evaluate the influence of the blockage of the irrigation emitter on the performance of the drip irrigation system, so that the monitoring accuracy of the blockage degree of the irrigation emitter is improved, and the Kelissen uniformity coefficient is as follows:
Figure BDA0002508411200000031
in the formula CuThe kris-sen uniformity coefficient,%; x is the number ofiIs the observed value of the water yield of the ith douche in unit (ml);
Figure BDA0002508411200000033
is the sample mean, in units (ml); and N is the number of monitoring points.
And (3) counting uniformity:
Figure BDA0002508411200000032
wherein Us is statistical uniformity coefficient,%; s is the sample observation and standard deviation.
Preferably, in order to quantitatively analyze the statistical relationship between the average flow ratio Dra of the emitter and the influence factors such as air entrainment (AI), Emitter Type (ET), emitter rated flow (EQ), irrigation duration (T) and the like, multiple linear regression analysis is performed to obtain a regression equation:
Dra＝1252.325+10.033AI+18.864EQ-27.119ET-9.493T
(R2＝0.877,P<0.01)。
in T tests of regression coefficients of various influence factors such as air entrainment (AI), emitter type (EQ), emitter flow rate (EQ), irrigation duration (T) and the like, the significance of T values is that P is 0.000<0.001, and the change of Dra is obviously influenced by the influence factors. Therefore, the multivariate linear regression analysis result shows that the air-entrapping treatment, the type of the irrigator, the flow rate of the irrigator and the irrigation time have obvious influence on the clogging of the irrigator; in the multiple linear regression analysis, the larger the absolute value of the normalization coefficient is, the larger the influence of the corresponding independent variable on the dependent variable is, so that the influence factors are ranked from large to small according to the influence degree on the emitter blockage: the irrigation time, the type of the irrigation emitter, the rated flow of the irrigation emitter and whether the gas is added or not. Therefore, when the emitter and the irrigation water source are in certain conditions, the aeration treatment has an important influence on the blockage of the drip irrigation emitter.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the air-entrapping drip irrigation system, the irrigation water is subjected to air-entrapping treatment by adopting the micro-nano bubbles, so that the blockage process of a drip irrigation emitter can be effectively relieved, and the service life of the drip irrigation system is prolonged; when the micro-nano bubbles are attached to the surface of an object, the friction resistance generated in the flowing process can be reduced, the flow speed in the flow channel of the irrigator is increased, the deposition of impurities in the flow channel of the irrigator is reduced, and the blockage of the irrigator is further reduced; the aeration treatment significantly increases the emitter life.
(2) According to the air-entrapping drip irrigation system, the clogging degree of an irrigator can be effectively relieved through air-entrapping treatment, the uniformity of the drip irrigation system is improved, and the service cycle of the irrigator and the drip irrigation system is prolonged.
(3) According to the air-entrapping drip irrigation system, the influence of the clogging of the irrigator on the performance of the drip irrigation system is evaluated by adopting the Richardson uniformity coefficient Cu and the statistical uniformity coefficient Us, and the accuracy of monitoring the clogging degree of the irrigator is improved.
(4) The invention relates to an aerated drip irrigation system, which limits the flow q of an emittereAnd the pressure p, the accuracy of the monitoring result of the irrigation emitter is improved, the use stability of the drip irrigation system is further improved, and the service life is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the drip irrigation system of the present invention.
FIG. 2 is a table of coefficients from a regression equation for regression analysis of emitter clogging influencing factors in accordance with the present invention.
FIG. 3 is a plot of the Krisesen uniformity coefficient Cu of the drip irrigation system of the present invention as a function of irrigation time.
Fig. 4 is a graph of the statistical uniformity coefficient Us of the drip irrigation system of the present invention as a function of irrigation time.
Fig. 5 is a relationship between the uniformity coefficient and the average flow rate ratio of the drip irrigation system of the present invention.
In the figure: 1. a first water tank; 2. a second water tank; 3. a micro-nano bubble generator; 4. a variable frequency pump; 5. a water delivery pipe; 6. a filter; 7. a valve; 8. a pressure gauge; 9. a drip tape.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, the aerated drip irrigation system comprises a header and an emitter, wherein the header comprises a first water tank 1, a second water tank 2, a variable frequency pump 4, a filter 6, a valve 7 and a pressure gauge 8; the positions of the first water tank 1 and the second water tank 2 close to the bottom are communicated through a water pipe; the first water tank 1 and the second water tank 2 are provided with micro-nano bubble generators, and the micro-nano bubble generators are connected with the first water tank 1 and the second water tank 2 to provide micro-nano bubbles; a water delivery pipe 5 is arranged in the second water tank 2, the water delivery pipe 5 is connected with a drip irrigation belt 9 of the irrigation emitter, and a variable frequency pump 4, a filter 6, a valve 7 and a pressure gauge 8 are sequentially arranged on the water delivery pipe 5 along the water flow direction; the irrigator comprises a plurality of groups of irrigation platforms, a plurality of drip irrigation belts 9 are mounted on the groups of irrigation platforms, and a plurality of irrigation drippers are arranged on the drip irrigation belts 9; 9 below of drip irrigation zone are equipped with water drainage tank, water drainage tank slope sets up, and the low one end of water drainage tank is connected with first water tank 1.
The dropper system also comprises an emitter blockage degree monitoring device; the monitoring process comprises the steps of enabling the emitter to stably run for 30 minutes under rated pressure, then sequentially placing rain gauges under the emitter at a monitoring point every 5 seconds, sequentially taking out the rain gauges 12 minutes later according to the placing sequence and time intervals, and then measuring the water quantity in the rain gauges by using the rain gauges.
Emitter clogging degree monitoring is expressed by an average flow ratio Dar:
Figure BDA0002508411200000051
in the formula: q. q.siThe flow of the ith douche in the blockage monitoring process is expressed in the unit of L/h; q. q.snewThe average flow of the douche before the test is started, L/h; n is the number of the douches to be measured.
The working pressure of the air-entrapping dropper system is stabilized at 0.1 Mpa.
The degree of the blockage of the douche is influenced by the factors of the douche time length, the air-entrapping treatment, the type of the douche and the rated flow of the douche.
The flow and the pressure of the douche satisfy the following relational expressions:
qe＝kpm；
in the formula: q. q.seThe flow of the irrigation emitter is expressed in the unit of L/h; p is the working pressure in MPa; k is a flow coefficient; m is a flow state index; coefficient of variation, Cv, is calculated as:
Figure BDA0002508411200000052
in the formula: sq is the standard deviation of the flow of the irrigation emitter, and the unit is L/h;
Figure BDA0002508411200000053
is the average flow L/h of the douche.
The emitter average flow ratio Dra reflects the emitter average flow reduction, with smaller Dra indicating greater emitter average flow attenuation and more severe clogging; it is generally believed that clogging of the emitter occurs when Dra ≦ 75%.
The drip irrigation system adopts a Leisinsen uniformity coefficient Cu and a statistical uniformity coefficient Us to evaluate the influence of the blockage of the irrigation emitter on the performance of the drip irrigation system, so that the accuracy of monitoring the blockage degree of the irrigation emitter is improved, and the Kelissen uniformity coefficient is as follows:
Figure BDA0002508411200000061
in the formula CuThe kris-sen uniformity coefficient,%; x is the number ofiIs the observed value of the water yield of the ith douche in unit (ml);
Figure BDA0002508411200000063
is the sample mean, in units (ml); and N is the number of monitoring points.
And (3) counting uniformity:
Figure BDA0002508411200000062
wherein Us is statistical uniformity coefficient,%; s is the sample observation and standard deviation.
Example two:
as shown in fig. 2, in the first embodiment, preferably, in order to quantitatively analyze the statistical relationship between the average emitter flow rate Dra and the influencing factors such as air entrainment (AI), Emitter Type (ET), emitter rated flow rate (EQ), and irrigation duration (T), a multiple linear regression analysis is performed to obtain a regression equation:
Dra＝1252.325+10.033AI+18.864EQ-27.119ET-9.493T
(R2＝0.877,P<0.01)。
in T tests of regression coefficients of various influence factors such as air entrainment (AI), emitter type (EQ), emitter flow rate (EQ), irrigation duration (T) and the like, the significance of T values is that P is 0.000<0.001, and the change of Dra is obviously influenced by the influence factors. Therefore, the multivariate linear regression analysis result shows that the air-entrapping treatment, the type of the irrigator, the flow rate of the irrigator and the irrigation time have obvious influence on the clogging of the irrigator; in the multiple linear regression analysis, the larger the absolute value of the normalization coefficient is, the larger the influence of the corresponding independent variable on the dependent variable is, so that the influence factors are ranked from large to small according to the influence degree on the emitter blockage: the irrigation time, the type of the irrigation emitter, the rated flow of the irrigation emitter and whether the gas is added or not. Therefore, when the emitter and the irrigation water source are in certain conditions, the aeration treatment has an important influence on the blockage of the drip irrigation emitter.
EXAMPLE III
As shown in fig. 3-4, on the basis of the first embodiment, a comparison test is performed, wherein one group is an aerated drip irrigation system, the other group is a non-aerated drip irrigation system, and the non-aerated drip irrigation system is consistent with the aerated system except that no micro-nano bubble generator is arranged at the head part; under the condition of air entrainment, the influence of the blockage of the irrigator on the hydraulic performance of the system, the Kelisson uniformity coefficient Cu and the statistical uniformity coefficient Us change along with the running time, and the change process of the Kelisson uniformity coefficient Cu and the statistical uniformity coefficient Us along with the working time is similar to that of the average flow ratio Dra; the system uniformity coefficient decreases with increasing irrigation time, and the uniformity coefficient varies differently from emitter to emitter. Wherein, the larger the rated flow of the same type of irrigator is, the more stable the uniformity coefficient is kept. And under the same rated flow, the uniform coefficient of different types of douches has different descending speeds. The uniformity coefficient of the columnar irrigator is reduced more obviously than that of the internally-inlaid piece type drip irrigation tape 9, and the uniformity coefficient of the irrigator without the pressure compensation function is more stable. The test group after air-entrapping treatment has better uniformity coefficient stability within the same working time.
According to the ASAE standard EP458, when the Us is 80% -90%, the system performance is evaluated to be 'excellent', and when the Us is less than 60%, the system performance is evaluated to be unqualified. Therefore, the time for the system statistics uniformity coefficient Us of the aerated drip irrigation system to be unqualified is obviously longer than that of the unaerated drip irrigation system. Particularly, the Us of the drip irrigation tape 9 is still slightly lower than 80% under the condition of air-entrapping treatment, so that the system performance is still qualified. The Us of the test group without gas filling treatment is reduced to nearly 40 percent, and the system performance is obviously unqualified and is not suitable for continuous use; the air-entrapping treatment is beneficial to keeping the drip irrigation system in good uniformity and effectively delaying the service life of the drip irrigation system.
Example four
As shown in fig. 5, the relationship between the uniformity coefficient Cu and the statistical uniformity coefficient Us of the drip irrigation system kris-senes and the average flow ratio Dra, and the Dra, Cu and Us all present a certain linear relationship; there is a significant difference in the effect of aeration on Cu and Us under the same conditions of the drip irrigation system Dra, and this difference is inversely related to Dra size. From the whole, both Cu and Us are superior to non-aerated treatment under aerated treatment conditions. Particularly, when the Dra is about 95%, after inflection points appear on Cu and Us, the positive effect of air-entrapping treatment on Cu and Us is more obvious along with the reduction of the Dra, which shows that the air-entrapping treatment can reduce the sensitivity of both Cu and Us of the drip irrigation system to the change of the Dra, and simultaneously shows that the air-entrapping treatment not only can delay the blockage of an emitter, but also can make the blockage degree of the emitter more uniform, thereby reducing the problem of the uniformity reduction of the drip irrigation system caused by the blockage of the emitter.
According to the air-entrapping drip irrigation system, the irrigation water is aerated by adopting micro-nano bubbles, so that the blockage process of a drip irrigation emitter can be effectively relieved, and the service life of the drip irrigation system is prolonged; when the micro-nano bubbles are attached to the surface of an object, the friction resistance generated in the flowing process can be reduced, the flow speed in the flow channel of the irrigator is increased, the deposition of impurities in the flow channel of the irrigator is reduced, and the blockage of the irrigator is further reduced; the aeration treatment obviously prolongs the service life of the irrigator; the blockage degree of the irrigator can be effectively relieved through air-entrapping treatment, the uniformity of a drip irrigation system is improved, and the service periods of the irrigator and the drip irrigation system are delayed; the influence of the clogging of the irrigator on the performance of a drip irrigation system is evaluated by adopting a Richardson uniformity coefficient Cu and a statistical uniformity coefficient Us, so that the accuracy of monitoring the clogging degree of the irrigator is improved; by limiting the flow q of the emittereAnd the pressure p, the accuracy of the monitoring result of the irrigation emitter is improved, the use stability of the drip irrigation system is further improved, and the service life is prolonged.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. An aerated drip irrigation system comprises a header and an emitter, and is characterized in that the header comprises a first water tank (1), a second water tank (2), a variable frequency pump (4), a filter (6), a valve (7) and a pressure gauge (8); the positions of the first water tank (1) and the second water tank (2) close to the bottom are communicated through a water pipe; the first water tank (1) and the second water tank (2) are provided with micro-nano bubble generators (3), and the micro-nano bubble generators (3) are connected with the first water tank (1) and the second water tank (2) to provide micro-nano bubbles; a water delivery pipe (5) is arranged in the second water tank (2), the water delivery pipe (5) is connected with a drip irrigation tape (9) of the irrigator, and a variable frequency pump (4), a filter (6), a valve (7) and a pressure gauge (8) are sequentially arranged on the water delivery pipe (5) along the water flow direction; the irrigator comprises a plurality of groups of irrigation platforms, a plurality of drip irrigation belts (9) are mounted on the groups of irrigation platforms, and a plurality of irrigation drippers are arranged on the drip irrigation belts (9); drip irrigation zone (9) below is equipped with water drainage tank, water drainage tank slope sets up, and the one end that water drainage tank is low is connected with first water tank (1).
2. The aerated drip irrigation system according to claim 1, wherein the drip tube system further comprises emitter clogging monitoring; the monitoring process comprises the steps of enabling the emitter to stably run for 30 minutes under rated pressure, then sequentially placing rain gauges under the emitter at a monitoring point every 5 seconds, sequentially taking out the rain gauges 12 minutes later according to the placing sequence and time intervals, and then measuring the water quantity in the rain gauges by using the rain gauges.
3. The aerated drip irrigation system of claim 2, wherein emitter clogging is monitored using a mean flow ratio Dar of:
Figure FDA0002508411190000011
in the formula: q. q.siThe flow of the ith douche in the blockage monitoring process is expressed in the unit of L/h; q. q.snewThe average flow of the douche before the test is started, L/h; n is the number of the douches to be measured.
4. The aerated drip irrigation system of claim 1, wherein the aerated drip tube system is operated at a pressure of 0.1 Mpa.
5. The aerated drip irrigation system of claim 2, wherein the degree of emitter clogging is influenced by the length of irrigation time, aeration treatment, emitter type, and emitter flow rating.
6. The aerated drip irrigation system according to claim 1, wherein the flow rate and pressure of the emitter satisfy the following relationships:
qe＝kpm；
in the formula: q. q.seThe flow of the irrigation emitter is expressed in the unit of L/h; p is the working pressure in MPa; k is a flow coefficient; m is a flow state index; coefficient of variation, Cv, is calculated as:
Figure FDA0002508411190000012
in the formula: sq is the standard deviation of the flow of the irrigation emitter, and the unit is L/h;
Figure FDA0002508411190000013
is the average flow L/h of the douche.
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Citations (7)

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