Rainwater collecting and recharging system for stony desertification region
Technical Field
The invention relates to a water and soil conservation technology for stony desertification control, in particular to a rainwater collection and recharging system for stony desertification areas.
Background
Stony desertification refers to a land degradation process similar to a desertification landscape due to water and soil resource loss and land productivity reduction caused by continuous degradation and even loss of vegetation due to artificial interference in a karst fragile ecological environment of carbonate rock development in a southern humid region of China, wherein bedrock is exposed on the ground surface (or gravel accumulation) in a large area.
Stony desertification is a very serious ecological problem, seriously affects the natural life and production labor of human beings, and is mainly formed by the development and transition of natural ecology and the weakening of natural ecological renewal caused by the excessive requirement of human beings on the nature. The damage of stony desertification is mainly represented by a series of natural disasters such as mountain floods, landslide, mud-rock flows and the like which are accompanied with the damage, so that a large amount of natural resources of the land subside and ecological degradation is caused.
Stony desertification is the most prominent ecological problem in stony desertification areas, and has become the source of disasters, the cause of poverty and the root behind. Since the 60 s of the 20 th century, china began some experimental work on stony desertification control, the stony desertification problem in the middle and later stages of the 90 s has attracted extensive attention from the society, and the stony desertification control work is developed by each level of government in succession, and certain effects are achieved. However, the current stony desertification control mode in southwest areas is still very serious, the stony desertification control task is still very difficult, and a feasible stony desertification control thought and countermeasure are urgently needed to be formulated, so that stony desertification control work in stony desertification areas is comprehensively promoted.
There are relatively few studies on stony desertification, and no report on a system for rainwater collection and recharge in stony desertification areas exists at present.
Disclosure of Invention
The invention mainly solves the technical problem of providing a rainwater collecting and recharging system for a stony desertification area, which can realize the collection, purification, storage and recharging of the rainwater in the stony desertification area.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
A stony desertification region rainwater collection recharging system comprising: the rainwater purification ditch comprises a collecting and recharging unit, a rainwater purification ditch and a rainwater storage tank;
The collecting and recharging unit comprises a rainwater collecting and recharging ditch, a water collecting main pipe and a water collecting branch pipe; the water collecting branch pipe and the water collecting main pipe are arranged in the rainwater collecting and recharging ditch; the water collecting branch pipes are uniformly arranged on the water collecting main pipe, the water collecting branch pipes are communicated with the water collecting main pipe, one end, far away from the water collecting main pipe, of each water collecting branch pipe is closed, and water distribution holes are formed in the upper parts of the water collecting branch pipes;
The rainwater purification ditch comprises a bottom and side walls, wherein the bottom is arranged between the side walls, and the cross section of the side walls of the rainwater purification ditch is trapezoid; the side wall of the rainwater purification ditch comprises an ecological vegetation bag and an ecological concrete ball, planting soil is arranged in the ecological vegetation bag, the ecological concrete ball is arranged on one side of the upstream surface of the side wall of the rainwater purification ditch, and the ecological concrete ball is made of concrete; the water collecting main pipe is communicated with the rainwater purifying ditch;
The rainwater storage pool is arranged at one end of the rainwater purification ditch and is communicated with the rainwater purification ditch; the rainwater storage tank is provided with a water pump.
Preferably, the bottom of the rainwater collection recharging ditch is lower than the ground, and the top of the rainwater collection recharging ditch is higher than the ground; and an overflow groove is arranged on the rainwater collecting and recharging groove.
Preferably, the water distribution holes on the water collecting branch pipes are arranged in two groups, the connecting line of each group of water distribution holes is parallel to the central axis of the water collecting branch pipes, and the distance between the adjacent water distribution holes in the same group is 0.3 m-0.7 m.
Preferably, the included angle between water distribution holes on the same vertical section is 120 degrees+/-10 degrees.
Preferably, a valve is arranged at the joint of the water collecting main pipe and the rainwater purification ditch.
Preferably, the ecological vegetation bag is made of geotextile.
Preferably, the side slope ratio of the side wall of the rainwater purification ditch is 2:1.
Preferably, the diameter of the ecological concrete ball is 20 cm-30 cm.
Preferably, an impermeable layer is arranged in the rainwater storage tank, and the impermeable layer is made of cement mortar.
Preferably, the water pump is a submersible pump.
Due to the application of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
The utility model provides a stony desertification area rainwater is collected and is recharged system, including collecting and recharging unit, rainwater purification ditch and rainwater storage tank, can realize the collection, purification, storage and the recharge of stony desertification area rainwater, through the current situation of stony desertification is improved in the soil and water conservation, has improved the collection and the utilization ratio of rainwater, and the stony desertification that can be applicable in multiple district is administered.
Drawings
FIG. 1 is a schematic diagram of a stormwater collection recharge system in stony desertification areas in accordance with the present invention.
Fig. 2 is a schematic view of a rainwater purification ditch in a rainwater collection and recharge system for stony desertification areas according to the present invention.
Fig. 3 is a schematic view of a rainwater storage tank in a rainwater collection and recharge system for stony desertification areas according to the present invention.
Fig. 4 is a schematic diagram of a water collection manifold and a water collection manifold in a rainwater collection and recharge system for stony desertification areas according to the present invention.
Fig. 5 is a cross-sectional view of a water collecting branch pipe in a rainwater collecting and recharging system for stony desertification areas according to the present invention.
Fig. 6 is a schematic diagram of the placement of water collection manifold in a stormwater collection recharge system in stony desertification areas in accordance with the present invention.
FIG. 7 is a schematic illustration of an overflow launder in a stony desertification area rainwater harvesting and recharging system according to the present invention.
Description of the drawings:
The rainwater collection and recharging ditch 1, the overflow tank 11, the water collecting main pipe 2, the water collecting branch pipe 3, the blind plate 31, the water distribution holes 32, the valve 4, the rainwater purification ditch 5, the ecological vegetation bag 51, the ecological concrete ball 52, the rainwater storage tank 6, the water pump 7, the ground 8 and the plants 9.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to the drawings, a rainwater collection and recharge system for stony desertification areas comprises: a collecting and recharging unit, a rainwater purifying ditch 5 and a rainwater storage tank 6.
The collecting and recharging unit comprises a rainwater collecting and recharging ditch 1, a water collecting main pipe 2 and a water collecting branch pipe 3. The rainwater collection recharging ditch 1 is arranged according to the topography and is arranged to be of a semi-underground structure, namely the bottom of the rainwater collection recharging ditch 1 is lower than the ground 8, and the top of the rainwater collection recharging ditch 1 is higher than the ground 8. Specifically, the bottom of the rainwater collection recharging ditch 1 is 10 cm-15 cm lower than the ground 8, the top of the rainwater collection recharging ditch is 10 cm-15 cm higher than the ground 8, the ditch width is 15 cm-20 cm, the existing slope can be generally used as the side wall of the rainwater collection recharging ditch 1 near the upper edge of the slope, and the rainwater collection recharging ditch and the rainwater recharging are beneficial to preventing and controlling water and soil loss in stony desertification areas. Since the rainwater collecting and recharging ditch 1 can be excavated according to the topography, not specifically shown in the figure.
The rainwater collecting and recharging ditch 1 is provided with an overflow groove 11 near the lower edge ditch wall of the side slope, and rainwater in the rainwater collecting and recharging ditch 1 can overflow to the ground 8 from the overflow groove 11 to recharge the ground 8 near the rainwater collecting and recharging ditch 1. The distance between the overflow grooves 11 is set to be about 200cm, the width of the overflow grooves 11 is set to be 5 cm-10 cm, and the depth of the overflow grooves 11 is 3 cm-5 cm, so that the overflow of the heavy rainfall rainwater and the reuse irrigation of the rainwater are facilitated.
The water collecting branch pipes 3 and the water collecting main pipe 2 are arranged in the rainwater collecting and recharging ditch 1, the water collecting branch pipes 3 are transversely paved in the rainwater collecting and recharging ditch 1 along the topography, the water collecting branch pipes 3 are uniformly arranged on the water collecting main pipe 2, and the water collecting branch pipes 3 are communicated with the water collecting main pipe 2. The water collecting branch pipe 3 and the water collecting main pipe 2 can be made of PE. The end of the water collecting branch pipe 3 far away from the water collecting main pipe 2 is sealed, namely, the tail end of the water collecting branch pipe 3 is sealed by a blind plate 31, so that water leakage is prevented.
The upper part of the water collecting branch pipe 3 is provided with a water distribution hole 32, and the aperture of the water distribution hole 32 can be set to be about 6 mm. The water distribution holes 32 on the water collecting branch pipe 3 are arranged in two groups, the connecting line of each group of water distribution holes 32 is parallel to the central axis of the water collecting branch pipe 3, and the distance between the adjacent water distribution holes 32 in the same group is 0.3 m-0.7 m. The included angle between the water distribution holes 32 on the same vertical section is 120 degrees plus or minus 10 degrees, and the arrangement of the included angle enables rainwater to be uniformly refilled into the rainwater collecting and recharging ditch 1 during rainwater recharging.
The rainwater purification ditch 5 is communicated with the water collection main pipe 2 through a pipeline, a valve 4 is arranged at the joint of the water collection main pipe 2 and the rainwater purification ditch 5, and inflow and outflow of rainwater are controlled by opening and closing the valve 4. The rainwater purification ditch 5 comprises a bottom and side walls, wherein the bottom is arranged between the side walls, and the cross section of the side walls of the rainwater purification ditch 5 is trapezoid. The side wall of the rainwater purification ditch 5 comprises an ecological vegetation bag 51 and an ecological concrete ball 52, and the side wall of the rainwater purification ditch 5 is formed by stacking the ecological vegetation bags 51, namely, the ecological vegetation bags 51 are stacked into a trapezoid column body to be used as the side wall of the rainwater purification ditch 5. The side slope ratio of the side wall of the rainwater purification ditch 5 can be set to be 2:1, namely, the ecological vegetation bags 51 are piled up to form a trapezoid section according to the side slope ratio of 2:1. The ecological vegetation bag 51 is made of geotechnical cloth, planting soil is arranged in the ecological vegetation bag 51, plant seeds can be mixed and sown in the planting soil, plants 9 can be directly planted in the planting soil, and the planting soil provides a growing environment for the plants 9.
The ecological concrete balls 52 are arranged on the water facing surface side of the side wall of the rainwater purification ditch 5, and the ecological concrete balls 52 are made of concrete. The ecological concrete balls 52 can be arranged to have the diameter of 20 cm-30 cm, have larger specific surface area, not only can effectively purify the rainwater quality, but also can play a role in reinforcing the side wall of the rainwater purification ditch 5.
The rainwater storage tank 6 is communicated with the rainwater purification ditch 5 through a pipeline, and the rainwater storage tank 6 is communicated with the water collecting main pipe 2 through a pipeline. The rainwater storage tank 6 is arranged at the tail end of the rainwater purification ditch 5 and adopts a stone masonry structure. The rainwater storage tank 6 is subjected to seepage prevention treatment by adopting cement mortar plastering, namely, a seepage prevention layer is arranged in the rainwater storage tank 6, and the seepage prevention layer is made of cement mortar. The rainwater storage tank 6 stores the collected and purified rainwater and irrigates vegetation in a period of water shortage. The rainwater storage tank 6 is provided with a water pump 7, the water pump 7 is arranged at the bottom of the rainwater storage tank 6, the water pump 7 is connected with the water collecting main pipe 2 through a pipeline, and the water pump 7 can be a submersible pump 7.
The rainwater collecting and recharging system for the stony desertification region can mainly achieve the effects of rainwater collecting, storing and rainwater recharging. In the rainfall period, the valve 4 at the joint of the water collecting main pipe 2 and the rainwater purification ditch 5 is in an open state, and the water pump 7 is in a closed state. The rainwater is collected through the water distribution holes 32 on the water collecting branch pipes 3, enters the water collecting main pipe 2 through the water collecting branch pipes 3, enters the rainwater purification ditch 5 through the water collecting main pipe 2, and enters the rainwater storage pool 6 for storage after being purified by the rainwater purification ditch 5. In the arid period, the valve 4 at the joint of the water collecting main pipe 2 and the rainwater purifying ditch 5 is in a closed state, the water pump 7 is in an open state, the stored rainwater in the rainwater storage pool is pumped into the water collecting main pipe 2 through the water pump 7, and the stony desertification arid area is irrigated through the overflow groove 11 overflow of the rainwater collecting and recharging ditch 1, so that the water and soil loss and stony desertification process can be effectively relieved.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the invention.