CN207885345U - A drip irrigation system suitable for artificial reconstruction of slope landforms - Google Patents

Abstract

The utility model relates to a drip irrigation system suitable for artificially reconstructing side slope landform, which comprises a water pumping device (1), a water source transfer pipeline (2), a low-level water storage tank (3), a high-level water storage tank (4) and a drip irrigation device, wherein the drip irrigation device is provided with a water seepage pipe (8), the low-level water storage tank (3) is arranged at the lower part of the side slope, the high-level water storage tank (4) is arranged at the upper part of the side slope, the water pumping device (1) is respectively connected with the low-level water storage tank (3) and the high-level water storage tank (4) through the water source transfer pipeline (2) and is used for sending a water pump in the low-level water storage tank (3) to the high-level water storage tank (4), the high-level drip irrigation tank (4) is connected with the upper part of the drip irrigation device and is used for leading the water in the high-level water storage tank (4) to flow into the drip irrigation filling, the low-level water, the other part of water is supplied to the side slope through a water seepage pipe (8). The utility model discloses can be applied to the even irrigation under the different side slope topography, improve artificial side slope topography irrigation water availability factor.

Description

A drip irrigation system suitable for artificial reconstruction of slope landforms

technical field

The utility model relates to a drip irrigation system suitable for artificially reconstructing slope landforms, which belongs to the field of irrigation. The system and method can design a uniform irrigation system that can be applied to different slope topography, and improve the use efficiency of artificial slope topography irrigation water.

Background technique

Irrigation is one of the main means to ensure the water required for the growth and development of slope vegetation. For the vegetation on artificially reconstructed slope landforms, the initial natural drought and lack of rain are the biggest test. The water capacity is limited, so choosing an appropriate irrigation method can not only make reasonable and efficient use of limited water resources, but also make the vegetation grow into flats as soon as possible, thereby effectively reducing soil erosion. Sprinkler irrigation and drip irrigation technologies have been applied maturely, but for slope problems, such problems are often not solved very well. On higher slopes, the irrigation water will flow quickly along the slope, preventing the water from penetrating deep into the soil. Although the traditional drip irrigation can slow down, but because the water quality of the water sources near the man-made terrain is often poor, there are many impurities in the water, it is very easy to block the drip holes of the traditional drip irrigation pipes, and the traditional drip irrigation pipes have a uniform design shape, and the terrain characteristics of the slope cause The uneven distribution of the irrigation capacity of the artificial soil by the traditional drip irrigation system will make it difficult for some vegetation to grow, which will make the slope terrain meaningless, and thus cannot solve the problem of efficient use of water resources.

Utility model content

The utility model is aimed at the problem that the traditional drip irrigation technology cannot be well used in the current slope, and innovatively provides a drip irrigation method and system suitable for artificial reconstruction of high-slope slope landforms. The system designed by this method can be applied to uniform irrigation under different slope topography, and improve the efficiency of irrigation water use in artificial slope topography.

The utility model relates to a drip irrigation system suitable for artificial reconstruction of slope landforms. The drip irrigation system includes a pumping device, a water source transmission pipeline, a low-level water storage tank, a high-level water storage tank and a drip irrigation device. The drip irrigation device has a seepage pipe, wherein, The low-level water storage tank is set at the lower part of the slope, and the high-level water storage tank is set at the upper part of the slope. The pumping device is respectively connected to the low-level water storage tank and the high-level water storage tank through the water source transmission pipeline, and is used to pump the water in the low-level water storage tank to the high-level water storage tank. In the pool, the high-level water storage tank is connected to the upper part of the drip irrigation device for the water in the high-level water storage tank to flow into the drip irrigation device, and the low-level water storage tank is connected to the lower part of the drip irrigation device to collect part of the water flowing out of the drip irrigation device, and the other part of the water passes through The seepage pipe supplies water to the slope.

Among them, the drip irrigation device also includes the main water delivery pipeline for water supply, the main water delivery pipeline for return water and the distribution water delivery pipeline; The water inlet of the water delivery pipeline is connected to the high-level water storage tank, the water outlet of the main water delivery pipeline is connected to the sub-water delivery pipeline, and the sub-water delivery pipeline is connected to the seepage pipe, which is used to transport water to the seepage pipe to supply water for the slope; the sub-water delivery pipeline It is also connected with the main return water pipeline, and the main water return pipeline is connected with the low-level water storage tank for sending water back to the low-level water storage tank.

Among them, the main water supply pipeline extends laterally along the upper part of the slope, and the branch water pipeline extends from the upper part of the slope to the lower part, preferably perpendicular to the extension direction of the main water pipeline; the seepage pipe runs from the left side of the slope to the right The main water delivery pipeline extends laterally along the lower part of the slope.

Among them, the water distribution pipeline has an upper water inlet, a lower water return port and a middle water outlet; the middle water outlet is arranged on the pipeline section between the upper water inlet and the lower water return port; The upper water inlet and the middle water outlet of the distribution pipeline are connected to the seepage pipe, which is used to transport water to the seepage pipe to supply water for the slope; the lower water return port of the distribution pipeline is connected to the return main water supply pipeline.

Wherein, the drip irrigation devices are arranged in multiple rows, arranged longitudinally along the slope, preferably 1-10 rows, and there are multiple water outlets in the middle of the water delivery pipeline.

Among them, there are multiple rows of seepage pipes, and the arrangement is as follows: multiple rows are arranged laterally from the upper part to the lower part of the slope; the angle between the slope and the horizontal plane is greater than 0 degrees and less than 90 degrees, preferably 10-70 Spend.

Wherein, the seepage pipe includes a supporting hard pipe, a seepage layer and a water outlet hole, wherein the water outlet hole is arranged on the supporting hard pipe; the seepage layer is wrapped on the supporting hard pipe and covers the water outlet hole.

Wherein, the seepage layer is made of foamed polyurethane plastic.

Among them, the drip irrigation device also includes a flow rate meter, an inlet pressure gauge, an outlet pressure gauge, a return valve and a water supply valve. The water supply valve is set between the main water supply pipeline and the high-level water storage tank to cut off and/or open the water supply. The return water valve is set at the lower part of the water distribution pipeline for cutting off and/or opening the return water, the flow rate gauge and the inlet pressure gauge are set at the upper part of the water distribution pipeline, and the outlet pressure gauge is set at the lower part of the water distribution pipeline.

The utility model also relates to a method for determining the permeability coefficient of seepage pipes at different heights in a drip irrigation system. The drip irrigation system is a drip irrigation system suitable for artificially reconstructing slope landforms. It is characterized in that it includes the following steps:

(1) First determine the daily water supply Q of the slope, the unit is m ³ /d, and d is the meaning of day;

(2) Determine the seepage velocity V _i in a single seepage pipe (8), the unit is m/d; the seepage velocity V _i satisfies the following formula (1):

Q=πDL×∑V _i , (i=1,2,3,...,n) (1)

Among them, i is the number of rows of seepage pipes, i=1,2,3,...,n; L is the design length of the supporting rigid pipe in the seepage pipe, in m; D is the design of the supporting rigid pipe in the seepage pipe Diameter D, unit m;

(3) Determine the seepage coefficient k _i of the seepage layer (14) of a single seepage pipe, unit m/d; the seepage coefficient k _i satisfies the following formula (2):

P _i is the internal pressure of the i-th row of seepage pipes, unit Pa; γ is the weight of water, unit N/m ³ , which is a fixed constant; h is the average thickness of the seepage layer, unit m;

(4) In order to ensure that the seepage capacity of each seepage pipe (8) is the same at different elevations, the seepage coefficient k _i of the seepage layer (14) of the seepage pipe at different heights is determined, and the seepage layer ( 14) The permeability coefficient _ki satisfies the following formula (3):

H is the total elevation of the slope design irrigation coverage area, in m, _{and H0} is the elevation difference between the free water surface in the high-level storage tank and the main water delivery pipeline (5), in m;

(5) Since the total elevation H of the slope design irrigation coverage area and the elevation difference _H0 between the free water surface in the high-level storage tank and the main water delivery pipeline (5) are known, firstly, the first row is obtained according to formula (3). The permeability coefficient k ₁ of the seepage pipes, the first row of seepage pipes is the first row of seepage pipes (8) arranged from the upper part of the slope, and the i-th row of seepage pipes can be obtained one by one from top to bottom by formula (4). Permeability coefficient k _i , formula (4) is:

In order to achieve the above purpose, a drip irrigation system suitable for slope terrain designed by the utility model includes: a water source system, a water delivery system and a seepage system, and the water source system includes a low water storage tank, a high water storage tank, a pump device and water source transmission pipeline, the low-level water storage tank is the source of irrigation water, the so-called high-level water storage tank is the source of irrigation potential energy, and the pumping device is a device that can pump the water source in the low-level water storage tank to the high-level water storage tank The power device, the water source transmission pipeline is connected to the low-level water storage tank, the pumping device and the high-level water storage tank; the water delivery system includes a main water delivery pipeline and a sub-water delivery pipeline, and the main water delivery pipeline refers to the water supply pipeline connected to the pumping device The thicker UPVC pipeline between the main water delivery pipeline and the seepage system. The UPVC is made of vinyl chloride monomer through polymerization reaction. UPVC is an amorphous thermoplastic resin with added stabilizers and lubricants. UPVC has mature molding technology and low cost. Its fluid resistance is small and its strength meets the requirements of engineering pipelines; the seepage system refers to the seepage pipe at the end of the irrigation flow , including a supporting hard pipe and a seepage layer. The supporting hard pipe refers to the main body support of the irrigation pipe with water outlet holes made of UPVC hard pipe. All the holes in the supporting hard pipe are horizontal through circular holes, and the diameter of the hole is larger than that in the water source. The diameter of the impurity is less than a quarter of the diameter of the supporting hard tube. The distribution of the holes on the supporting hard tube is uniform, and the spacing of the holes is guaranteed to be about 5 times the diameter of the supporting hard tube. The seepage layer is a known seepage The micro-elastic soft material with strong ability is the outer wrapping layer formed by wrapping the supporting hard tube with multiple layers. The micro-elastic soft material with known permeability is low foaming volume and high-density soft polyurethane plastic (common low-density polyurethane is artificial sponge) .

Further, the seepage pipes in the seepage system are used at different heights and positions in the drip irrigation system, and the permeability coefficients of the foamed polyurethane plastic wrapping layers of the seepage layers are different. According to Darcy's formula Under the condition that the seepage velocity of the seepage layer remains constant, there is an inverse relationship between the seepage pressure difference ΔP and the permeability coefficient k. The permeability coefficient is a reference coefficient of the ability of liquid to permeate through a porous medium, so the foamed polyurethane plastics with different permeability coefficients are realized by the amount of foaming. Therefore, since the same drainage pipes on the artificial slope are all in the same horizontal plane, their elevations are equal, and different drainage pipes are arranged equidistantly on the elevation H _i , then from the bottom drainage pipe to the highest drainage pipe , the elevation of each row of seepage pipes increases _gradually , and the seepage pressure difference between the inside and outside of the pipes also increases _gradually . times, then according to the inverse proportional relationship, the permeability coefficient k ₂ of the polyurethane plastic used outside the second row of seepage pipes is about 1/2 of the permeability coefficient k ₁ of the polyurethane plastic used outside the highest row of seepage pipes; and then the seepage pressure in the third row of seepage pipes The difference ΔP ₃ is about 3 times of the seepage pressure difference ΔP ₁ in the highest drainage pipe, and the permeability coefficient k ₃ outside the third drainage pipe is about 1/3 of the permeability coefficient k ₁ of the vadose layer outside the highest drainage pipe. By analogy, the permeability coefficient _ki of the foamed polyurethane used outside the seepage pipes of all rows is designed to realize that the drip irrigation water seepage provided by the seepage pipes at different heights on the slope is approximately equal.

Furthermore, the low-foaming high-density flexible polyurethane plastic wrapping layer has a certain water seepage capacity, but it is different from the single-hole water seepage design mode of the traditional drip irrigation system, and the porous structure of the foamed polyurethane plastic makes the entire drip irrigation system resistant to impurities in the water source. The content requirements are much lower. Even if the water source contains more sediment and impurities, the possibility of all permeable pores being blocked is very low, so as to avoid the partial or overall functional failure of the irrigation system caused by the blockage of the drip holes in the traditional drip irrigation system.

The utility model has the advantages that: the structural design of wrapping the foamed polyurethane plastic on the outside of the seepage pipe makes it possible to greatly reduce the probability that the seepage hole will be blocked by impurities while ensuring the high-quality characteristics of the traditional drip irrigation system with low water consumption; The seepage coefficient has a drip irrigation system with decreasing gradient changes, so that the layout design of the drip irrigation system can be reasonably allocated according to the actual slope requirements, so that the slope terrain can realize efficient water resource utilization in the irrigation process; the utility model makes complex slope terrain Uniform irrigation can also be achieved, avoiding the unintended growth of vegetation due to uneven irrigation, which makes the artificial slope terrain function invalid.

Description of drawings

Fig. 1 is a schematic diagram of the overall layout structure of a drip irrigation system suitable for artificially recreating slope landforms of the present invention;

Fig. 2 is the microstructure schematic diagram of seepage system in the utility model;

Fig. 3 is a flow chart for determining the seepage coefficient of seepage pipes at different heights in a drip irrigation system of the present invention.

In the figure: pumping device 1, water source transmission pipeline 2, low water storage tank 3, high water storage tank 4, main water supply pipeline 5, main water pipeline for return water 6, distribution pipeline 7, seepage pipe 8, flow rate Table 9, inlet pressure gauge 10, outlet pressure gauge 11, return water valve 12, water supply valve 13, seepage layer 14, supporting hard pipe 15, water outlet hole 16

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail;

Since the traditional drip irrigation design is based on the design of paving and covering pipe networks based on simple and flat landforms, the efficiency of this flat design in artificial slope landforms is low, and the water sources of artificial slope landforms generally draw water nearby, and the water There are more impurities, and the water pipes are easily blocked. Therefore, according to the defects of the original drip irrigation system and the use requirements of the new terrain, a utility model is carried out for the design structure of the pipe network bedding and irrigation terminal. The specific implementation is as follows:

As shown in Figure 1-2, a drip irrigation system suitable for artificial reconstruction of slope landforms, the drip irrigation system includes a pumping device 1, a water source transmission pipeline 2, a low-level water storage tank 3, a high-level water storage tank 4 and a drip irrigation device, The drip irrigation device has a seepage pipe 8, wherein the low water storage tank 3 is arranged at the lower part of the slope, the high water storage tank 4 is arranged at the upper part of the slope, and the pumping device 1 is respectively connected to the low water storage tank 3 and the high water storage tank through the water source transfer pipeline 2. The water tank 4 is used to pump the water in the low-level water storage tank 3 to the high-level water storage tank 4. The high-level water storage tank 4 is connected to the upper part of the drip irrigation device, and is used to make the water in the high-level water storage tank 4 flow into the drip irrigation device. The low-level water storage tank 3 is connected to the drip irrigation device. The lower part of the drip irrigation device is used to collect a part of the water flowing out of the drip irrigation device, and the other part of the water is supplied to the slope through the seepage pipe 8 . The drip irrigation device also includes a main water supply pipeline 5, a main water supply pipeline 6 and a water distribution pipeline 7; the main water supply pipeline 5 is arranged on the top of the slope, and the main water supply pipeline 5 has a water inlet and a water outlet , the water inlet of the main water supply pipeline 5 is connected to the high-level water storage tank 4, the water outlet of the main water supply pipeline 5 is connected to the sub-water delivery pipeline 7, and the sub-water delivery pipeline 7 is connected to the seepage pipe 8 for transporting water to the seepage pipe 8 , to supply water to the slope; the sub-water delivery pipeline 7 is also connected to the main water delivery pipeline 6 of the return water, and the main water delivery pipeline 6 of the return water is connected to the low-level water storage tank 3 for sending water back to the low-level water storage tank 3.

Wherein, the main water supply pipeline 5 extends laterally along the top of the slope, and the sub-water pipeline 7 extends from the top of the slope to the bottom, preferably perpendicular to the extension direction of the main water pipeline 5; The left part extends to the right, preferably perpendicular to the extending direction of the branch water delivery pipeline 7; the return water main water delivery pipeline 6 extends laterally along the lower part of the slope. The water distribution pipeline 7 has an upper water inlet, a lower water return port and a middle water outlet; the middle water outlet is arranged on the pipeline section between the upper water inlet and the lower water return port; the water outlet of the main water delivery pipeline 5 is connected to the water distribution pipeline 7 The upper water inlet of the water distribution pipeline 7 is connected to the seepage pipe 8, and the middle water outlet of the water distribution pipeline 7 is used to transport water to the water seepage pipe 8 to supply water for the slope; the lower water return port of the water distribution pipeline 7 is connected to the main return water pipeline 6. The drip irrigation devices are arranged in multiple rows, arranged longitudinally along the side slope, preferably 1-10, and there are multiple water outlets in the middle of the water distribution pipeline (7). The seepage pipes 8 are multi-rows, and their arrangement is as follows: there are multiple rows arranged transversely from the top to the bottom of the slope; the angle between the slope and the horizontal plane is greater than 0 degrees and less than 90 degrees, preferably 10-70 degrees . As shown in Figure 2, the seepage pipe 8 includes a support hard pipe 15 seepage layer 14 and a water outlet hole 16, wherein the water outlet hole 16 is arranged on the support hard pipe 15; the seepage layer 14 is wrapped on the support hard pipe 15 and covers the water outlet hole 16 . The seepage layer 14 is made of foamed polyurethane plastic. The drip irrigation device also includes a flow rate gauge 9, an inlet pressure gauge 10, an outlet pressure gauge 11, a water return valve 12 and a water supply valve 13. The water supply valve 13 is arranged between the main water supply pipeline 5 and the high-level water storage tank 4 for cutting off And/or open the water supply, the water return valve 12 is arranged on the lower part of the water distribution pipeline 7, and is used to cut off and/or open the return water, the flow rate gauge 9 and the inlet pressure gauge 10 are arranged on the top of the water distribution pipeline 7, and the outlet pressure Table 11 is arranged on the lower part of the water distribution pipeline 7 .

The pumping device 1 is used to improve the power of the overall system, and move the water resources in the nearby water source to the high place of the slope terrain, so that the water source generates gravitational potential energy, and the potential energy drives the migration of irrigation water to achieve the purpose of irrigation. The water resources of various water delivery pipelines are distributed to the drip irrigation terminals of the seepage system. The infiltration system is the irrigation terminal of the entire drip irrigation system, which is responsible for irrigating the water source directly to the soil surface. Since the purpose of this utility model is to irrigate the water source evenly into the slope landform, the design of the seepage system can be designed with reference to the following calculation formulas, etc., as shown in Figure 3, which shows the infiltration of seepage pipes at different heights in a drip irrigation system Flowchart for determining coefficients.

Fig. 3 schematically shows a method for determining the permeability coefficient of seepage pipes at different heights in a drip irrigation system. The drip irrigation system is a drip irrigation system suitable for artificial reconstruction of slope landforms, and it is characterized in that it includes the following steps:

(1) First determine the daily water supply Q of the slope, the unit is m ³ /d, and d is the meaning of day;

(2) Determine the seepage velocity V _i in a single seepage pipe (8), the unit is m/d; d is the meaning of day; the seepage velocity V _i satisfies the following formula (1):

Q=πDL×∑V _i , (i=1,2,3,...,n) (1)

Among them, i is the number of rows of seepage pipes, i=1,2,3,...,n; L is the design length of the supporting rigid pipe in the seepage pipe, in m; D is the design of the supporting rigid pipe in the seepage pipe Diameter D, unit m;

(3) Determine the seepage coefficient k _i of the seepage layer (14) of a single seepage pipe, unit m/d; the seepage coefficient k _i satisfies the following formula (2):

P _i is the internal pressure of the i-th row of seepage pipes, unit Pa; γ is the weight of water, unit N/m ³ , which is a fixed constant; h is the average thickness of the seepage layer, unit m;

(4) In order to ensure that the seepage capacity of each seepage pipe (8) is the same at different elevations, the seepage coefficient k _i of the seepage layer (14) of the seepage pipe at different heights is determined, and the seepage layer ( 14) The permeability coefficient _ki satisfies the following formula (3):

H is the total elevation of the slope design irrigation coverage area, in m, _{and H0} is the elevation difference between the free water surface in the high-level storage tank and the main water delivery pipeline (5), in m;

(5) Since the total elevation H of the slope design irrigation coverage area and the elevation difference _H0 between the free water surface in the high-level storage tank and the main water delivery pipeline (5) are known, firstly, the first row is obtained according to formula (3). The permeability coefficient k ₁ of the seepage pipes, the first row of seepage pipes is the first row of seepage pipes (8) arranged from the upper part of the slope, and the i-th row of seepage pipes can be obtained one by one from top to bottom by formula (4). Permeability coefficient k _i , formula (4) is:

The specific process steps are as follows:

Firstly, according to the completed artificial reconstruction of the slope landform, the required water supply Q for the given slope can be obtained, the unit is m ³ /d, and the unit is m. Assuming that the water demand on the slope area covered by each vertical drainage pipe is Q1, and the evaporation on the same slope area is Q2, then the water demand on the slope area covered by the vertical drainage pipe is Q=Q1+Q2, The water demand and evaporation of the vegetation on the slope shall be provided according to the climate experience of the area where the project is located and the experience of vegetation cultivation. According to the scope of the seepage of the fixed source water source in the soil, the distance between each seepage pipe in the seepage system is determined. According to Figure 1, theoretically, the denser the design of the seepage pipe, the more obvious the uniform effect of irrigation, but the cost of the irrigation system will be higher. Therefore, the design spacing of seepage pipes should be considered according to the actual economic situation. At present, it is assumed that n rows of seepage pipes are designed in the middle of the slope, and then according to the water supply Q, the possible seepage velocity in the seepage layer of each seepage pipe in the seepage system can be obtained. Since the pipes used in the seepage system are relatively thin, a single The gravity in the seepage layer of the root seepage pipe has little effect on the seepage velocity distribution, which can be ignored, so the seepage velocity in the seepage layer of the i-th row of seepage pipes is V _i , the unit is m/d, where i=1,2,3 ,...,n. In order to facilitate design and processing, the design length L and diameter D of the supporting hard pipes in all seepage pipes in n rows are equal, and the unit is m. Then, the water supply Q and the seepage velocity V _i have the following relationship:

Q=πDL×∑V _i , (i=1,2,3,...,n), formula (1)

Further, in order to ensure uniform irrigation water on the entire slope, ensure that the seepage velocity V _i on the n rows of seepage pipes is the same, that is, V ₁ =V ₂ =L=V _n . According to Darcy's formula The relationship between the pressure P _i in the i-th row of seepage pipe and the seepage velocity V can be obtained:

where _ki (m/d) is the average permeability coefficient of the seepage layer of the i-th row of seepage pipes, in m/d; P _i is the internal pressure of the i-th row of seepage pipes, in units of Pa; P ₀ is the pressure outside the seepage layer of the i-th seepage pipe, that is Atmospheric pressure, unit Pa, since the design is based on atmospheric pressure, so P ₀ = 0; γ is the weight of water, unit N/m ³ , is a fixed constant; h is the average thickness of the seepage layer, unit m, for the convenience of design and processing, Therefore, the uniform seepage layer thickness of all seepage pipes is designed to be h. Since the area of seepage covered soil of each row of seepage pipes is basically the same, the spacing between all seepage pipes is actually the same, and the water pressure in a single row of seepage pipes is at the same elevation, so the distribution of pressure _Pi in a single pipe is basically the same everywhere, while There is the following relationship between the permeability coefficient _ki of the i-th row of seepage pipe and the internal pressure _Pi of the row of seepage pipe:

Furthermore, if the total elevation of the slope design irrigation coverage area is H, the unit is m, then the elevation difference between the free water surface in the high-level storage tank and the main water delivery pipeline is H ₀ , the unit is m; the elevation of the i-th row of seepage pipes is H _i , the unit is m, and in order to facilitate the construction, the space between all the seepage pipes is designed to be evenly distributed, so the elevation is based on the bottom seepage pipe, then the elevation of the i-th row of seepage pipe can be expressed as The pressure _Pi in the i-th row of seepage pipes is equal to the pressure at the corresponding position on the distribution pipeline of the water delivery system, so the distribution pipeline of the water delivery system should satisfy the Bernoulli equation The internal pressure P _i of the i-th row of seepage pipes should also satisfy the Bernoulli equation. The drip irrigation system belongs to a water-saving device, so the water flow in the system is relatively slow, and the water flow in the pipeline is basically in a laminar flow state. The Noury equation can be simplified to the following equation:

Furthermore, in order to ensure that the seepage capacity of each row of seepage pipes is the same at different elevations, the internal pressure _{Pi of} the i-th row of seepage pipes should satisfy the following Bernoulli equation:

but

Then the permeability coefficient _ki of the i-th row of seepage pipes can be expressed as:

If the permeability coefficient k ₁ of the first row of seepage pipes is known, the permeability coefficient k _i of the i-th row of seepage pipes is

If H ₀ is small or there is a leak in the main water supply pipeline, then H ₀ ≈ 0, and the permeability coefficient _ki of the i-th row of seepage pipes can be simplified as

According to the above formula, the specific value of the permeability coefficient _ki of the seepage layer of different drainage pipes can be preliminarily obtained. The design uses approximately simplified materials to improve the efficiency of water use.

Claims (11)

1. a kind of drip irrigation system that is applicable to artificial reconstruction slope topography, it is characterized in that, described drip irrigation system comprises pumping device (1), water source transfer pipeline (2), low level water storage tank (3), high level water storage tank ( 4) and a drip irrigation device, the drip irrigation device has a seepage pipe (8), wherein the low water storage tank (3) is arranged at the bottom of the slope, the high water storage tank (4) is arranged at the top of the slope, and the water pumping device (1) is respectively Connect the low-level water storage tank (3) and the high-level water storage tank (4) through the water source transfer pipeline (2), for pumping the water in the low-level water storage tank (3) to the high-level water storage tank (4), and the high-level water storage tank (4) ) is connected to the upper part of the drip irrigation device, and is used to make the water in the high-level water storage tank (4) flow into the drip irrigation device; Water is supplied to the slope through the seepage pipe (8). 2. drip irrigation system according to claim 1, is characterized in that, drip irrigation device also comprises water supply main water delivery pipeline (5), backwater main water delivery pipeline (6) and sub-water delivery pipeline (7); The water pipeline (5) is arranged on the upper part of the slope, and the main water supply pipeline (5) has a water inlet and a water outlet. The water outlet of road (5) is connected with sub-water delivery pipeline (7), and sub-water delivery pipeline (7) is connected with seepage pipe (8), and is used to deliver water to seepage pipe (8) to supply water for the slope; The road (7) is also connected to the main return water delivery pipeline (6), and the main return water delivery pipeline (6) is connected to the low-level water storage tank (3) for sending water back to the low-level water storage tank (3). 3. The drip irrigation system according to claim 2, characterized in that, the main water supply pipeline (5) extends transversely along the top of the slope, and the sub-water pipeline (7) extends from the top of the slope to the bottom; seepage The pipe (8) extends from the left to the right of the side slope; the main return water delivery pipeline (6) extends laterally along the lower part of the side slope. 4. The drip irrigation system according to one of claims 1-3, characterized in that, the water distribution pipeline (7) has an upper water inlet, a lower water return port and a middle water outlet; the middle water outlet is provided with an upper water inlet and a lower return On the pipeline section between the water outlets; the water outlet of the main water supply pipeline (5) is connected to the upper water inlet of the sub-water delivery pipeline (7), and the middle water outlet of the sub-water delivery pipeline (7) is connected to the seepage pipe (8), It is used to deliver water to the seepage pipe (8) to supply water to the slope; the lower water return port of the sub-water delivery pipeline (7) is connected to the return main water delivery pipeline (6). 5. The drip irrigation system according to any one of claims 1-3, characterized in that, the drip irrigation device is provided with multiple rows, arranged longitudinally along the side slope, and the middle water outlet of the water distribution pipeline (7) is provided with multiple rows. indivual. 6. The drip irrigation system according to claim 5, characterized in that, the drip irrigation devices are arranged longitudinally along the slope, and are arranged in 1-10 rows. 7. The drip irrigation system according to any one of claims 1-3, characterized in that the seepage pipes (8) are in multiple rows, and their arrangement is as follows: multiple rows are arranged transversely from the top to the bottom of the slope; The included angle between the slope and the horizontal plane is greater than 0 degrees and less than 90 degrees. 8. The drip irrigation system according to claim 7, characterized in that the angle between the slope and the horizontal plane is 10-70 degrees. 9. The drip irrigation system according to any one of claims 1-3, characterized in that the seepage pipe (8) is a low-permeability seepage pipe (8). 10. The drip irrigation system according to any one of claims 1-3, characterized in that the drip irrigation device also includes a flow rate gauge (9), an inlet pressure gauge (10), an outlet pressure gauge (11), and a return valve (12) And the water supply valve (13), the water supply valve (13) is arranged between the main water supply pipeline (5) and the high level water storage tank (4), and is used to cut off and/or open the water supply, and the water return valve (12) is arranged on the branch The lower part of the water delivery pipeline (7) is used to cut off and/or open the return water, the flow rate gauge (9) and the inlet pressure gauge (10) are set on the upper part of the water delivery pipeline (7), and the outlet pressure gauge (11) is set In the lower part of the water delivery pipeline (7). 11. drip irrigation system according to claim 3, is characterized in that, sub-water delivery pipeline (7) extends from the top of side slope to the bottom, and is perpendicular to the extension direction of main water delivery pipeline (5) of water supply; Seepage pipe ( 8) extending from the left to the right of the slope, and perpendicular to the extension direction of the water distribution pipeline (7).