CN108035397B - Collecting method and irrigation system suitable for rock surface runoff in karst region - Google Patents

Collecting method and irrigation system suitable for rock surface runoff in karst region Download PDF

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CN108035397B
CN108035397B CN201711352597.6A CN201711352597A CN108035397B CN 108035397 B CN108035397 B CN 108035397B CN 201711352597 A CN201711352597 A CN 201711352597A CN 108035397 B CN108035397 B CN 108035397B
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water
polyvinyl chloride
rock
cement
collecting barrel
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CN108035397A (en
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徐勤学
陈洪松
李春茂
付智勇
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Institute of Subtropical Agriculture of CAS
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Institute of Subtropical Agriculture of CAS
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    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/02—Methods or installations for obtaining or collecting drinking water or tap water from rain-water
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B13/00—Irrigation ditches, i.e. gravity flow, open channel water distribution systems
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
    • 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
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/108—Rainwater harvesting

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Abstract

The invention discloses a method for collecting rock surface runoff in a karst region and an irrigation system, comprising the following steps of: A. finding out rocks with flat rock surfaces in the middle of the mountain as much as possible, and building a water enclosing ridge by using cement mortar at the upper part; B. building strip-shaped cement on a rock surface by using cement mortar at a rock-soil interface, and inserting L-shaped polyvinyl chloride strips in parallel to form a water bearing groove; C. connecting an orifice on the water bearing tank with a water collecting barrel, wherein the water collecting barrel is arranged in the middle of the mountain body, the stirring barrel is arranged at the lower part of the mountain body and is higher than the field, and the water collecting barrel is connected with the stirring barrel through a water conveying pipe; D. digging a round hole at a place needing irrigation in a field, inserting a prefabricated polyvinyl chloride circular tube, filling dry branches and fallen leaves in the gap, and finally connecting a stirring barrel and the prefabricated polyvinyl chloride circular tube by using a water conveying pipe. The invention relieves the pressure of less surface water resource sources during irrigation on the karst slope, solves the problems of single slope irrigation mode and low efficiency, and reduces the water and soil loss of the slope to a certain extent.

Description

Collecting method and irrigation system suitable for rock surface runoff in karst region
Technical Field
The invention belongs to the technical field of slope hydrology, soil and water conservation and agricultural irrigation, and particularly relates to a method suitable for collecting rock surface runoff in a karst region, and a system suitable for irrigation in the karst region by utilizing the rock surface runoff.
Background
In the southwest karst region of China, although rainfall is abundant, shallow soil layers of sloping fields have weak water storage capacity, and abundant karst pores and crack structures exist, a large amount of surface water leaks, underground water is deeply buried, and the problem of water shortage is always a bottleneck restricting the social and economic development of the region. Aiming at the common problems of drought, rain shortage, shortage of water for production and living and the like in spring in autumn and winter in the karst region, a plurality of runoff collecting and utilizing technologies suitable for slopes and depression areas in the karst region, such as a water cellar, a water tank, a reservoir and the like, are proposed, are used as important engineering facilities for regulating surface runoff and efficiently utilizing rainwater resources, and play an important role in industrial and agricultural production and ecological environment construction. However, similar engineering facilities are high in cost and are mostly built in places with concentrated population, and part of sloping fields for agricultural activities are far away from water cellars or other water sources, so that the water using problem for irrigation of the sloping fields is not fully solved.
The field reconnaissance finds that the slope areas of the karst region are cultivated after artificial reclamation, the water and soil loss and the rock desertification degree of the slope cultivated land are serious, and the rock exposure rate is very high. Research shows that in slope farmland with high bare rock coverage rate, surface rocks can receive most rainfall and are converted into rock surface runoff, and the rock surface runoff is an important slope runoff generating mode in karst regions. And the rock surface runoff is abundant, and the soil moisture near the rock is obviously influenced. The local slope farmland irrigation is basically 'eating by the sky' through the visit investigation, or a water collecting pit is dug on the slope surface to collect rainfall for irrigation, or water is pumped by the power of an engine, but the overall efficiency is not high. Therefore, according to local characteristics, the method collects abundant rock surface runoff on the slope farmland according to local conditions, can greatly facilitate the irrigation of crops near the slope farmland, and has important significance for solving the problem of agricultural irrigation of the slope farmland in the karst region.
Disclosure of Invention
The invention aims to provide a method suitable for collecting rock surface runoff in a karst region, which is simple and feasible, is simple and convenient to operate, has common required materials and low cost, and can effectively and continuously collect and store the rock surface runoff. The method provided by the invention is combined with regional characteristics, focuses on the rock surface runoff water resource which is a fresh concern, and solves the problem that karst rock surface runoff is difficult to collect.
The invention further aims to provide a system suitable for irrigation in karst regions by using the rock surface runoff, which fully utilizes the characteristics of karst terrain and considers the characteristic of faster infiltration of water in karst soil and irrigates nearby field lands by using the collected rock surface runoff. The karst slope irrigation system solves the problems of single karst slope irrigation mode and low efficiency, and provides a technical means for the aspects of full development, reasonable utilization and the like of limited water resources in the region.
A method for collecting rock surface runoff in a karst region comprises the following steps:
A. finding rocks with flat rock surfaces in an exposed rock area in the middle of a mountain, building a water enclosing ridge around the rocks by cement mortar, wherein the height of the water enclosing ridge is 10cm, filling pits in the water enclosing ridge area, and forming an orifice of 2cm on the water enclosing ridge near the rainwater collection position, so that rainwater flows out of the orifice and then flows along the rock surfaces;
B. and (3) building the surface of the rock by using cement mortar at a position close to the boundary of the soil and the stone, wherein the cement mortar is in a long strip shape from the left end to the right end of the rock, the width of the cement mortar is 4cm, the thickness of the cement mortar is 3cm, and the slope of 5 degrees is kept. When cement mortar has certain plasticity, inserting an L-shaped polyvinyl chloride strip with the width of 6cm, and cutting the L-shaped polyvinyl chloride strip with the width of 5cm at a position with a bulge and a turn for transition. The L-shaped polyvinyl chloride strip is parallel to the cement, two ends of the L-shaped polyvinyl chloride strip are blocked by the cement, a 2cm hole is formed in the cement at the lowest position of the L-shaped polyvinyl chloride strip, and a 10cm plastic pipe is connected. After the cement is firmly bonded with the L-shaped polyvinyl chloride strip, sealing a gap between the polyvinyl chloride strip and the cement and a gap between the polyvinyl chloride strips through silicone adhesive to form a watertight water bearing tank;
C. the plastic pipe on the water-bearing tank is connected with the water inlet of the water-collecting barrel, the diameter of the water inlet of the water-collecting barrel is 2cm, a hole with the diameter of 2cm is formed in the position, close to the bottom, of the water-collecting barrel and serves as a water outlet, the water outlet is 5cm higher than the bottom of the water-collecting barrel, a valve is arranged on the water outlet, and the direction of the water inlet of the water-collecting barrel is different from that of the water. The oil cloth is arranged along the periphery of the opening of the water collecting barrel, the oil cloth is cut into a fan shape, one end of the oil cloth is connected with the opening of the water collecting barrel, the other end of the oil cloth extends to the periphery, and the oil cloth has a gradient of 10-20 degrees, so that the water collecting efficiency is improved.
In the above steps, the key step is to build the long-strip cement on the rock near the rock-soil interface. The heterogeneity of the karst limestone is high, and the plasticity of the cement mortar can well overcome the problems of various rock shapes, uneven surface, more cracks and the like. In addition, the cement mortar has certain plasticity before solidification, and the L-shaped polyvinyl chloride strips can be embedded in the cement mortar to form a water bearing groove, so that the problem that rock surface flow is not easy to collect is solved.
The invention has the beneficial technical effects that the method is suitable for collecting rock surface runoff in the karst region, and the pressure of water resource shortage on the surface of the karst slope is relieved. Meanwhile, technical support is provided for relevant research of rock surface runoff in the karst region, such as the erosion process of the rock surface runoff on an earth-rock interface, the influence of the rock surface runoff on soil moisture and nutrients of a rock niche and the like.
A system for irrigation using rock face currents suitable for use in karst regions, the system comprising: and (3) building a water enclosing ridge by using cement mortar around the upper part of the rock, filling the pits, and chiseling water outlets on the water collecting part. And (3) building strip-shaped cement along the surface of the rock by using cement mortar, inserting the L-shaped polyvinyl chloride strip in parallel with the cement mortar after the cement mortar has plasticity, and sealing the joint by using silicone adhesive. A first water outlet is formed in the L-shaped polyvinyl chloride strip and connected with a water delivery pipe, and the other end of the water delivery pipe is connected with a first water inlet of the water collecting barrel. The water collecting tank is provided with a second water outlet below, the second water outlet is connected with a first polyvinyl chloride circular tube, a first valve is installed at the tail end of the first polyvinyl chloride circular tube, the first valve is connected with a second water inlet on the stirring tank through a water pipe, a third water outlet is arranged at the bottom of the stirring tank and is connected with a second polyvinyl chloride circular tube, a second valve is installed at the tail end of the second polyvinyl chloride circular tube and is connected with the water pipe, the other end of the water pipe is connected with a prefabricated polyvinyl chloride circular tube in an irrigation area, and the joint of the orifice and the water pipe is sealed through silicone adhesive.
In this system, the key is that the position of water catch bowl will be higher than the agitator, and the position of agitator will be higher than the field irrigation district, so just can satisfy rivers and obtain the power of flowing automatically, improve irrigation efficiency.
The karst region rock surface runoff irrigation system has the advantages that the karst region rock surface runoff irrigation system is provided, limited water resources in the karst slope are fully utilized, and the slope irrigation efficiency is greatly improved.
Drawings
Fig. 1 is a schematic structural diagram of a method suitable for collecting rock surface runoff in a karst region.
Fig. 2 is a schematic structural view of a water collecting tub.
Fig. 3 is a schematic diagram of a rock surface runoff irrigation system suitable for karst regions.
Fig. 4 is a schematic structural diagram of a prefabricated polyvinyl chloride round pipe.
Wherein: 1-rock, 2-water surrounding ridge, 3-cement mortar, 4-L-shaped polyvinyl chloride strips, 5-silicone adhesive, 6, first water outlet, 7-water conveying pipe, 8-water collecting barrel, 9-first valve, 10-first water inlet, 11-second water outlet, 12-waterproof oil cloth, 13-first polyvinyl chloride circular pipe, 14-second polyvinyl chloride circular pipe, 15-stirring barrel, 16-second water inlet, 17-third water outlet, 18-second valve and 19-prefabricated polyvinyl chloride circular pipe.
Detailed Description
Example 1:
a method suitable for rock surface runoff collection in a karst region comprises the following steps:
the first step is to select the rock 1 with better development and smoother rock surface as much as possible in the exposed rock area of the karst slope. And (3) building a water enclosing ridge 2 around the top of the rock 1 by using cement mortar 3, wherein the height of the water enclosing ridge 2 is about 10cm, and filling the pit on the upper part of the rock 1 by using cement mortar 3. And in the place where the rainwater is collected, an opening with the length of about 2cm is formed in the water enclosing ridge 2, so that the rainwater flows downwards along the surface of the rock after coming out of the opening.
And secondly, selecting a rock surface with water flow discharged downwards, building strip cement on the rock surface by using cement mortar 3 at a position close to the earth-rock boundary below the rock surface, and building from the left end of the rock surface to the right end. The strip cement has a width of about 4cm and a thickness of about 3cm, and is kept at 5oLeft and right slopes. When the cement mortar 3 has certain plasticity, an L-shaped polyvinyl chloride strip 4 with the width of 6cm and the thickness of 5mm is inserted in parallel with the cement mortar 3, and a small section of the L-shaped polyvinyl chloride strip 4 is cut at a position with a bulge and a turn for transition. The two ends of the L-shaped polyvinyl chloride strip 4 are blocked by cement mortar 3, and a first water outlet of about 2cm is formed in the cement at the lowest part of the L-shaped polyvinyl chloride strip6 and is connected with a water conveying pipe 7 with the length of about 10 cm. When the strip-shaped cement and the L-shaped polyvinyl chloride strip 4 are firmly bonded, the gap between the polyvinyl chloride strip and the cement and the gap between the polyvinyl chloride strips are sealed through the silicone adhesive.
The third step is to connect the water delivery pipe 7 on the water-bearing tank with the first water inlet 10 on the water-collecting bucket 8. The diameter of the first water inlet 10 is about 2cm, an orifice with the diameter of about 2cm is cut at the position, 5cm higher than the bottom, of the water collecting barrel 8 to serve as a second water outlet 11, a first polyvinyl chloride circular pipe 13 is firstly installed on the second water outlet 11, and a first valve 9 is installed on the first polyvinyl chloride circular pipe 13. The first water inlet 10 and the second water outlet 11 of the water collecting barrel 8 are not in the same straight line, and the second water outlet 11 is higher than the bottom by 5cm, so that silt blockage can be avoided. The waterproof tarpaulin 12 is arranged along the periphery of the opening of the water collecting barrel 8, one section of the waterproof tarpaulin 12 is connected with the opening, and the other end of the waterproof tarpaulin 12 extends to the periphery and is fixed at a position which is about 1m higher than the opening, so that the waterproof tarpaulin 12 has a certain gradient (about 10-20 degrees) to increase the water collecting efficiency.
The invention solves the problem of rock surface flow collection and relieves the pressure of less water resource sources on the earth surface of the karst sloping field.
Example 2:
the applicant conducts experiments at observation research stations of civic river karst ecosystems of department of south county of China, province of south China, Guangxi river estuary, 8 months to 2017 months and 11 months, builds a rock surface flow collecting tank by the method in the field, and quantitatively monitors runoff on the surface of the rock for a long time by using a skip bucket rain gauge. And (4) obtaining rainfall data of 8-10 months by searching meteorological data of a research station. Wherein the daily rainfall (ml) is daily rainfall mm multiplied by the rock surface area, and the collection efficiency is rock surface runoff/rainfall. The results are shown in Table 1.
TABLE 1 test data
Date Rainfall (ml) Rock surface runoff volume (ml) Collection efficiency (%)
17.8.23 32000 5000 15.6
17.8.24 196000 30600 15.6
17.8.25 28800 8700 30.3
17.8.27 8400 1500 42.9
17.8.28 241600 51000 21.1
17.8.29 57600 9500 16.5
17.9.05 64000 7200 11.3
17.9.08 348800 108800 31.2
17.9.11 72000 8200 11.4
17.9.12 60800 8000 13.2
17.9.20 171200 59500 34.8
17.9.26 62400 8000 12.8
17.10.02 35200 2600 7.4
17.10.05 140800 33100 23.5
17.10.08 48000 11000 22.9
Total of 1567600 352700 22.5
Note: measured surface area of rock and measured according to 8m2And (4) calculating.
As can be seen from Table 1, the efficiency of collecting rock surface flow by the method of the invention reaches 22.5%, and more importantly, the collected water amount is considerable and reaches 352.7m3Therefore, it is necessary to collect the surface flow in the exposed rock area of the karst slope land, and the method is worthy of practice.
The procedure was as in example 1.
Example 3:
a system suitable for karst areas are irrigated by rock surface runoff, and the using process comprises the following steps:
step one, collecting rock surface runoff in a rock exposed area in the middle of a mountain, allowing the rock surface runoff to enter a water collecting barrel 8, standing silt and storing. A plastic stirring barrel 15 is arranged at the lower part of the mountain and a place slightly higher than a field irrigation area, and the stirring barrel 15 is designed to be similar to the water collecting barrel 8 as shown in figure 3. One end of the water pipe 7 is connected with the first valve 9, and the other end is connected with the second water inlet 16. The third water outlet 17 of the stirring barrel 15 is connected with a second polyvinyl chloride circular tube 14, and the second polyvinyl chloride circular tube 14 is connected with a second valve 18. A water delivery pipe 7 with enough length (determined by the distance from the stirring barrel to the irrigation area) is taken, one section of the water delivery pipe 7 is connected with a second valve 18, and the other end of the water delivery pipe 7 extends to the field irrigation area.
And secondly, digging a round hole with the diameter of about 10cm and the depth of about 30cm at a place needing irrigation in a field irrigation area, inserting a prefabricated polyvinyl chloride round pipe 19 (shown in figure 4) with the diameter of 5cm and the length of 40cm, and filling dry branches, fallen leaves, straws or soil and the like into the gap. 2-3 similar round holes are drilled at each irrigation position. When rock surface runoff is collected in the exposed region of rock in the middle of the mountain and irrigation is satisfied, the second valve 18 of the stirring barrel 15 is closed at first, fertilizer can be added in the plastic barrel according to the needs of farmers, then the first valve 9 of the water collecting barrel 8 is opened, and water flow reaches the stirring barrel 15 under the action of gravity and is fully mixed with the fertilizer. And opening a second valve 18 at the water outlet of the stirring barrel 15, and inserting the second valve 18 and the water delivery pipe 7 connected with the second valve into a prefabricated polyvinyl chloride round pipe 19 buried in the field for irrigation. When the water level in the prefabricated polyvinyl chloride circular tube 19 is slowly reduced, the irrigation is stopped, and the next irrigation is carried out.
Through above-mentioned measure, the rock face runoff reaches the field district under the action of gravity to can mix with fertilizer before the irrigation, not only make full use of is domatic limited water resource, can also improve irrigation effect and efficiency.
Example 4:
according to the figures 1, 2, 3 and 4, the system suitable for irrigation in karst regions by using rock surface runoff comprises rocks 1, water surrounding ridges 2, cement mortar 3, L-shaped polyvinyl chloride strips 4, silicone adhesive 5, a first water outlet 6, a water conveying pipe 7, a prefabricated water collecting barrel 8, a first valve 9, a first water inlet 10, a second water outlet 11, waterproof oil cloth 12, a first polyvinyl chloride circular pipe 13, a second polyvinyl chloride circular pipe 14, a stirring barrel 15, a second water inlet 16, a third water outlet 17, a second valve 18 and a prefabricated polyvinyl chloride circular pipe 19, and the connection relation is as follows: a water enclosing ridge 2 is built on the periphery of the top of a rock 1 by cement mortar 3, strip-shaped cement is built along the surface of the rock 1 by the cement mortar 3 at the position close to the earth-rock boundary, after the cement mortar 3 has certain plasticity, an L-shaped polyvinyl chloride strip 4 is inserted into the cement mortar 3 in parallel with the cement mortar 3, and the joint is sealed by silicone adhesive 5. And a first water outlet 6 is arranged on the cement at the lowest position of the L-shaped polyvinyl chloride strip 4. The first water outlet 6 is connected with one end of a water pipe 7, the other end of the water pipe 7 is connected with a first water inlet 10 of a water collecting bucket 8, a waterproof tarpaulin 12 is arranged along the opening of the water collecting bucket 8, and a second water outlet 11 is arranged below the waterproof tarpaulin. The second water outlet 11 is connected with a first polyvinyl chloride circular tube 13, and a first valve 9 is arranged at the tail end of the first polyvinyl chloride circular tube 13. The upper part of the mixing barrel 15 is provided with a second water inlet 16, the second water inlet 16 is connected with the first valve 9 through a water conveying pipe 7, the bottom of the mixing barrel 15 is provided with a third water outlet 17, the third water outlet 17 is connected with a second polyvinyl chloride circular pipe 14, the tail end of the second polyvinyl chloride circular pipe 14 is provided with a second valve 18, the second valve 18 is connected with the water conveying pipe 7 which is long enough (determined according to the distance from the mixing barrel to the irrigation area), and the other end of the water conveying pipe 7 is connected with a prefabricated polyvinyl chloride circular pipe 19 in the irrigation area. The joints of the orifices and the water pipes are sealed by silicone rubber 5.
Through the measures, the water-bearing tank can enter the water collecting barrel to be stored after rock surface runoff is collected. When the water quantity in the water collecting barrel in the middle of the mountain is enough to meet the requirement of field irrigation on the lower part of the mountain, a valve of the water collecting barrel is opened, and water flow firstly reaches the stirring barrel under the action of self weight and is stirred and mixed with the fertilizer. And opening a valve of the stirring barrel, and guiding water flow to the field for irrigation. The measures can greatly improve the irrigation efficiency.

Claims (3)

1. A method for collecting rock surface runoff in a karst region comprises the following steps:
A. selecting rocks with flat rock surfaces in the middle of a mountain, building a water enclosing ridge around the rocks by cement mortar, wherein the height of the water enclosing ridge is 10cm, filling pits in the range of the water enclosing ridge, and forming a 2cm hole on the water enclosing ridge at the rainwater collection position, so that rainwater flows out of the hole and then flows along the rock surfaces;
B. at the boundary of the soil and the stone, cement mortar is used for building strip-shaped cement on the surface of the rock from the left end to the right end, when the cement mortar has certain plasticity, an L-shaped polyvinyl chloride strip with the width of 6cm is inserted in parallel with the cement mortar, and the L-shaped polyvinyl chloride strip with the width of 5cm is cut at the position with a bulge and a turn for transition, wherein the L-shaped polyvinyl chloride strip is parallel to the cement and is 5oThe two ends of the L-shaped polyvinyl chloride strip are plugged by cement, an orifice of 2cm is formed in the cement of the L-shaped polyvinyl chloride strip, a water delivery pipe of 10cm is connected, and after the cement and the L-shaped polyvinyl chloride strip are firmly bonded, the L-shaped polyvinyl chloride strip is sealed by silicone adhesiveA gap between the polyvinyl chloride strip and the cement and a gap between the polyvinyl chloride strips form a watertight water bearing tank;
C. placing a water collecting barrel below the rock, connecting a water delivery pipe on a water bearing tank with a water inlet of the water collecting barrel, wherein the diameter of the water inlet of the water collecting barrel is 2cm, a hole with the diameter of 2cm is formed in the position, close to the bottom, of the water collecting barrel to serve as a water outlet, the water outlet is 5cm higher than the bottom of the water collecting barrel, a valve is arranged on the water outlet, the water inlet and the water outlet are not in the same straight line, cutting the oilcloth into a fan shape, one end of the oilcloth is connected with an opening of the water collecting barrel, the other end of the oilcloth extends to the periphery and is hung at a high position 1moIncreasing the efficiency of water collection.
2. The irrigation system suitable for the collection method of rock surface runoff in the karst region comprises rocks (1), water enclosing ridges (2), cement mortar (3), L-shaped polyvinyl chloride strips (4), silicone adhesive (5), a first water outlet (6), a water conveying pipe (7), a prefabricated water collecting barrel (8), a first valve (9), a first water inlet (10), a second water outlet (11), waterproof oil cloth (12), a first polyvinyl chloride circular pipe (13), a second polyvinyl chloride circular pipe (14), a stirring barrel (15), a second water inlet (16), a third water outlet (17), a second valve (18) and a prefabricated polyvinyl chloride circular pipe (19), and is characterized in that: the method comprises the steps of building a water enclosing ridge (2) on the periphery of the top of a rock (1) by cement mortar (3), building strip-shaped cement along the surface of the rock by the cement mortar (3), inserting an L-shaped polyvinyl chloride strip (4) into the water enclosing ridge in parallel with the cement mortar (3) after the cement mortar (3) has plasticity, sealing a joint by silicone adhesive (5), arranging a first water outlet (6) on the L-shaped polyvinyl chloride strip (4), connecting the first water outlet (6) with a water pipe (7), connecting the other end of the water pipe (7) with a first water inlet (10) of a water collecting barrel (8), connecting a waterproof oilcloth (12) with an opening of the water collecting barrel (8), arranging a second water outlet (11) below the water collecting barrel, connecting the second water outlet (11) with a first polyvinyl chloride circular pipe (13), installing a first valve (9) at the tail end of the first polyvinyl chloride circular pipe (13), and connecting the first valve (9) with a second water inlet (16) on a stirring barrel (15) by the water pipe (7), the bottom of the stirring barrel (15) is provided with a third water outlet (17) and is connected with a second polyvinyl chloride circular tube (14), the tail end of the second polyvinyl chloride circular tube (14) is provided with a second valve (18), the second valve (18) is connected with a water delivery pipe (7), the other end of the water delivery pipe (7) is connected with a prefabricated polyvinyl chloride circular tube (19) in an irrigation area, and the joint of the orifice and the water delivery pipe is sealed by silicone adhesive (5).
3. The irrigation system as recited in claim 2, wherein: after the rock surface runoff collected in the middle of the mountain enters the water collecting barrel (8), a first valve (9) on the water collecting barrel (8) is opened, water flow can obtain the stirring barrel (15) flowing into the lower part of the mountain through gravity, a second valve (18) on the stirring barrel (15) is opened, and the water flow reaches a field irrigation area under the action of gravity.
CN201711352597.6A 2017-12-15 2017-12-15 Collecting method and irrigation system suitable for rock surface runoff in karst region Expired - Fee Related CN108035397B (en)

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