CN115949040A - Ecological intercepting ditch system, construction method thereof and method for recycling rice field water return - Google Patents
Ecological intercepting ditch system, construction method thereof and method for recycling rice field water return Download PDFInfo
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- CN115949040A CN115949040A CN202211664743.XA CN202211664743A CN115949040A CN 115949040 A CN115949040 A CN 115949040A CN 202211664743 A CN202211664743 A CN 202211664743A CN 115949040 A CN115949040 A CN 115949040A
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Abstract
The invention discloses an ecological intercepting ditch system, a construction method thereof and a method for recycling rice field water drainage. The ecological intercepting ditch system comprises a drainage ditch and an intercepting dam positioned at a drainage outlet of the drainage ditch, wherein the side slope and the ditch bottom of the drainage ditch are paved by grass planting bricks; the dam top of the interception dam is used as an overflow channel, the middle lower part of the dam body is provided with a drainage gate opening which is used as a clear water channel, and the bottom of the dam body is provided with a sludge discharge opening. The ecological intercepting ditch system has the advantages of small occupied area, low cost, convenient maintenance and convenient dredging, does not need the traditional dredging measure for excavating a river channel, saves the cost and avoids damaging the complete aquatic ecosystem in the ecological ditch.
Description
Technical Field
The invention belongs to the technical field of agricultural non-point source pollution control, and particularly relates to an ecological intercepting ditch system for recycling rice field water drainage, a construction method thereof and a method for recycling rice field water drainage.
Background
Rice is an important grain crop in China, multiple times of irrigation and water removal are needed in rice planting, residues of a large amount of chemical fertilizers and organic fertilizers are discharged into a river channel through a drainage channel along with farmland water removal and finally enter a river and lake ecological system, obvious eutrophication risks are caused, and the water ecological environment safety is threatened. Therefore, there is a need for scientific development of applicable treatment technology systems in rice growing areas to effectively reduce the load of rice field recession water pollution, thereby ensuring the improvement of river and lake water quality.
Ecological transformation of farmland drainage ditches can save land resources and reduce pollutants, and in recent years, technical schemes of prolonging hydraulic retention time and improving pollutant removal rate by ecological interception dams are developed, and the ecological transformation of farmland drainage ditches is gradually popularized in domestic non-point source pollution prevention and control. For example, CN113415894A discloses a multifunctional ecological dam for purifying the water quality of the rice field effluent. CN111170465A discloses a floating water inlet flap rotary ecological dam.
However, the existing technology combining the ecological interception ditch with the water blocking dam encounters the problem that pollutants are accumulated in the ditch and are not easy to clean in the long-term operation process, especially under the large background that straw returning is widely promoted in recent years, a large amount of decomposed straw residues, microorganism residues and particles are deposited in the interception ditch together, so that the water quality of the ditch is deteriorated, the requirement of recycling can not be met, and even secondary pollution is generated. The traditional dredging means can completely destroy aquatic plants, benthos communities and microbial communities in the ditches, influence the ecological functions of the ecological interception ditches, and establish a sustainable ecological interception ditch system for keeping the ecological system complete, which is an important way for breaking through the rice field non-point source treatment.
Disclosure of Invention
The invention aims to provide an ecological intercepting ditch system, a construction method thereof and a method for recycling rice field water-discharging. The system has the advantages of small occupied area, low cost, convenient maintenance and convenient dredging, does not need the traditional dredging measure for excavating a river channel, saves the cost and avoids destroying a complete aquatic ecosystem in an ecological ditch.
In order to achieve the purpose, the invention adopts the following technical scheme:
the ecological intercepting ditch system for recycling rice field water drainage comprises a drainage ditch and an intercepting dam positioned at a drainage outlet of the drainage ditch, wherein side slopes and ditch bottoms of the drainage ditch are paved by grass planting bricks; the dam top of the interception dam is used as an overflow channel, the middle lower part of the dam body is provided with a drainage gate opening which is used as a clear water channel, and the bottom of the dam body is provided with a sludge discharge opening.
Preferably, the grass planting bricks are provided with prefabricated holes.
Further preferably, the distance between the prefabricated holes is 400-800mm, and the size is 200-400mm.
Further preferably, a cultivation tuck net is fixed in the prefabricated holes.
Further preferably, the aquaculture net is used for breeding mussels and/or snails.
Preferably, the overflow channel is provided with a gravel layer and aquatic plants for filtering the overflow body of water.
Preferably, the dam body of the interception dam is provided with a water intake for recycling rice field water returned in the interception ditch.
Preferably, the sludge discharge port is connected with the sedimentation tank through a pipeline, and the eutrophic sludge accumulated in the drainage ditch is collected and recycled by the sedimentation tank.
Further preferably, the pipeline is provided with a control valve, and bottom mud with high organic matter content deposited in the drainage channel is emptied before the flood season.
The invention also provides a construction method of the ecological intercepting ditch system for recycling rice field recession, which comprises the following steps:
(1) Building or modifying a drainage ditch, and flattening the side slope and the ditch bottom;
(2) Paving grass planting bricks at the bottom and side slopes of the drainage ditch, and pouring concrete at the junction of the top grass planting bricks and the road for fixation;
(3) Fixing a cultivation pocket net in the holes of the grass planting bricks, and naturally recovering the vegetation at the bottom of the ditch and the side slope by the native aquatic plants;
(4) An interception dam is arranged at a water outlet of the drainage ditch, the top of the interception dam is an overflow channel, gravels are covered, aquatic plants are cultivated for filtering an overflow water body, a drainage gate opening is arranged at the middle lower part of the dam body and serves as a clear water channel and a water intake, a sludge discharge opening is arranged at the bottom of the dam body, and the sludge discharge opening is connected with the sedimentation tank through a pipeline; and the pipeline is provided with a control valve.
The invention also provides a method for recycling the rice field for water return, and the ecological intercepting ditch system is adopted for recycling the rice field for water return.
The invention has the following beneficial effects:
(1) Convenient clear row siltation maintains aquatic ecology: through the control of a pipeline valve at the bottom of the intercepting dam, sediment with high organic matter content deposited in the ditch can be emptied before the flood season, the traditional dredging measure for excavating the river channel is not needed, the cost is saved, and meanwhile, the complete aquatic ecosystem in the ecological ditch is prevented from being damaged.
(2) Convenient maintenance and economic benefit generation: benthic water purification animals such as mussel/spiral shell use the pocket to fix in prefabricated grass planting brick hole, receive the protection of grass planting brick for this system can adopt the high-pressure squirt to erode interception ditch silt and carry out high-efficient system maintenance, and simultaneously, mussel/spiral shell grow can also produce direct economic benefits after matcing.
(3) The floor space is small, and the treatment efficiency is high: the sedimentation tank only collects high-concentration sludge at the bottom of the ditch, and has smaller occupied area and better efficiency compared with the sedimentation tank used in the prior art.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention.
An ecological intercepting ditch system for recycling rice field water-fall comprises a drainage ditch and an intercepting dam positioned at a water outlet of the drainage ditch, wherein a side slope and a ditch bottom of the drainage ditch are paved by grass planting bricks; the dam top of the intercepting dam is used as an overflow channel, the middle lower part of the dam body is provided with a drainage gate opening which is used as a clear water channel, and the bottom of the dam body is provided with a sludge discharge opening.
Preferably, the grass planting bricks are provided with prefabricated holes.
Further preferably, the distance between the prefabricated holes is 400-800mm, and the size is 200-400mm.
Further preferably, a culture tuck net is fixed in the prefabricated holes.
Further preferably, the aquaculture net is used for breeding mussels and/or snails.
Preferably, the overflow channel is provided with a gravel layer and aquatic plants for filtering the overflow body of water.
Preferably, the dam body of the interception dam is provided with a water intake for recycling rice field water returned in the interception ditch.
Preferably, the sludge discharge port is connected with the sedimentation tank through a pipeline, and the eutrophic sludge accumulated in the drainage ditch is collected and recycled by the sedimentation tank.
The construction method of the ecological intercepting ditch system for recycling rice field water return comprises the following steps:
(1) Building or modifying a drainage ditch, and flattening the side slope and the ditch bottom;
(2) Paving grass planting bricks at the bottom and side slope of the drainage ditch, and pouring concrete at the junction of the top grass planting bricks and the road for fixing;
(3) Fixing a cultivation pocket net in the holes of the grass planting bricks, and naturally recovering the vegetation at the bottom of the ditch and the side slope by the native aquatic plants;
(4) An interception dam is arranged at a water outlet of the drainage ditch, the top of the interception dam is an overflow channel, gravels are covered, aquatic plants are cultivated for filtering an overflow water body, a drainage gate opening is arranged at the middle lower part of the dam body and serves as a clear water channel and a water intake, a sludge discharge opening is arranged at the bottom of the dam body, and the sludge discharge opening is connected with the sedimentation tank through a pipeline; and the pipeline is provided with a control valve.
In order to further understand the technical scheme and technical effect of the present invention, the following description is made with reference to specific construction schemes.
An ecological intercepting ditch system for recycling rice field water return comprises a construction method as follows:
1. modifying a drainage ditch of the paddy field into a ditch with the depth of 3.5 meters, the width of the bottom of 1.5 meters and the cross slope ratio of 1, and flattening the side slope and the ditch bottom;
2. the side slope and the bottom of the drainage ditch are paved with 400mm 70mm double splayed grass planting bricks, and concrete is poured at the junction of the top grass planting bricks and the road for fixation.
3. And fixing and cultivating hyriopsis cumingii by using mesh bags and iron wires in the ditch bottom and the holes of the double-eight type grass planting bricks of the side slope within the range of 1 meter of the ditch bottom, wherein the vegetation of the ditch bottom and the side slope is naturally recovered by the native aquatic plants.
4. An interception dam with the height of 3 meters is arranged at the water outlet of the drainage ditch (entering an ecological system such as a river and a lake), the top of the interception dam is an overflow channel, gravels are covered, and aquatic plants are cultivated to filter an overflow water body. A drainage gate opening is arranged at a position 600mm away from the bottom of the ditch of the interception dam and serves as a clear water channel for draining clear water, a water intake is arranged at a position 800mm away from the bottom of the ditch of the interception dam and serves as a water intake for recycling rice field water returned in the interception ditch, and a sludge discharge pipeline with the inner diameter of 300mm is arranged at the joint of the interception dam and the bottom of the drainage ditch and is provided with a control valve.
5. The sludge discharge pipeline is connected into a 3000-cubic-meter sedimentation tank. The sedimentation tank is designed according to the capacity of a 600mm deep muddy water mixture at the bottom of a 1-kilometer drainage canal, and the extra water quantity brought by a high-speed water flow flushing system is considered.
6. During the rice planting period, collected farmland drainage is naturally purified in the drainage ditch and is used for recycling and intercepting the rice field drainage in the ditch.
7. And (4) operation maintenance measures, namely before the flood season every year, clear water is drained through a drainage gate opening 600mm away from the bottom of the ditch, sludge is drained through a sludge discharge pipe, and a high-pressure water gun is used for washing residual sludge, so that the pollution peak value in the flood season is effectively reduced.
The ecological intercepting ditch system has the following advantages:
(1) Convenient clear row siltation maintains aquatic ecology: through the control of a pipeline valve at the bottom of the intercepting dam, sediment with high organic matter content deposited in the ditch can be emptied before the flood season, the traditional dredging measure for excavating the river channel is not needed, the cost is saved, and meanwhile, the complete aquatic ecosystem in the ecological ditch is prevented from being damaged.
(2) Convenient maintenance and economic benefit generation: benthic water purification animals such as mussel/spiral shell use the pocket to fix in prefabricated grass planting brick hole, receive the protection of grass planting brick for this system can adopt the high-pressure squirt to erode interception ditch silt and carry out high-efficient system maintenance, and simultaneously, mussel/spiral shell grow can also produce direct economic benefits after matcing.
(3) The floor area is small, and the treatment efficiency is high: the sedimentation tank only collects high-concentration sludge at the bottom of the ditch, and the required floor area is smaller and the efficiency is better than that of the sedimentation tank used in the prior art.
The present invention is further described with reference to specific embodiments, but these embodiments are merely exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The ecological intercepting ditch system for recycling rice field water return is characterized by comprising a drainage ditch and an intercepting dam positioned at a drainage outlet of the drainage ditch, wherein side slopes and ditch bottoms of the drainage ditch are paved by grass planting bricks; the dam top of the interception dam is used as an overflow channel, the middle lower part of the dam body is provided with a drainage gate opening which is used as a clear water channel, and the bottom of the dam body is provided with a sludge discharge opening.
2. The ecological intercepting gutter system according to claim 1, wherein the grass planting bricks are provided with prefabricated holes.
3. The ecological intercepting trench system of claim 1, wherein the pre-fabricated holes have a pitch of 400-800mm and a diameter size of 200-400mm.
4. The ecological intercepting ditch system of claim 2, wherein a cultivation purse net is fixed in the prefabricated holes.
5. The ecological intercepting drain system according to claim 4, wherein the farming tuck net is used for farming mussels and/or snails.
6. The ecological intercepting gutter system according to claim 1, wherein the overflow channel is provided with a gravel layer and aquatic plants for filtering the overflow water body.
7. The ecological intercepting ditch system according to claim 1, wherein the dam body of the intercepting dam is provided with a water intake for recycling rice field water returned in the intercepting ditch.
8. The ecological intercepting trench system of claim 1, wherein the sludge discharge port is connected to the settling tank through a pipe; and the pipeline is provided with a control valve.
9. The method for constructing an ecological intercepting drain system for recycling rice field sewage as set forth in any one of claims 1 to 8, comprising the steps of:
(1) Building or modifying a drainage ditch, and flattening the side slope and the ditch bottom;
(2) Paving grass planting bricks at the bottom and side slopes of the drainage ditch, and pouring concrete at the junction of the top grass planting bricks and the road for fixation;
(3) Fixing a cultivation pocket net in the holes of the grass planting bricks, and naturally recovering the vegetation at the bottom of the ditch and the side slope by the native aquatic plants;
(4) Arranging an interception dam at a water outlet of the drainage ditch, wherein the top of the interception dam is an overflow channel, covering gravels and cultivating aquatic plants for filtering an overflow water body, a drainage gate opening is arranged at the middle lower part of the dam body and is used as a clear water channel and a water intake, and a sludge discharge opening is arranged at the bottom of the dam body and is connected with the sedimentation tank through a pipeline; and the pipeline is provided with a control valve.
10. A method for recycling rice field water-dropping, characterized in that the ecological intercepting drain system of any one of claims 1 to 8 is used for recycling rice field water-dropping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211664743.XA CN115949040A (en) | 2022-12-23 | 2022-12-23 | Ecological intercepting ditch system, construction method thereof and method for recycling rice field water return |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211664743.XA CN115949040A (en) | 2022-12-23 | 2022-12-23 | Ecological intercepting ditch system, construction method thereof and method for recycling rice field water return |
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| CN115949040A true CN115949040A (en) | 2023-04-11 |
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| CN202211664743.XA Pending CN115949040A (en) | 2022-12-23 | 2022-12-23 | Ecological intercepting ditch system, construction method thereof and method for recycling rice field water return |
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Citations (6)
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| KR100657183B1 (en) * | 2006-10-14 | 2006-12-15 | (주)정도엔지니어링 | Vegetation block with equipment structure |
| KR20090081861A (en) * | 2008-01-25 | 2009-07-29 | 주식회사 아썸 | An inhabitant of shellfish and a system for the quality of water purification |
| CN103015382A (en) * | 2012-12-28 | 2013-04-03 | 镇江山水湾生态农业开发有限公司 | Agricultural non-point source pollution ecological intercepting ditch |
| CN108755617A (en) * | 2018-06-01 | 2018-11-06 | 四川旭昊德环保设备有限公司 | A kind of reservoir row silt system and method |
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| CN112875868A (en) * | 2021-03-02 | 2021-06-01 | 安徽农业大学 | Method for solving agricultural non-point source pollution |
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2022
- 2022-12-23 CN CN202211664743.XA patent/CN115949040A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| KR100657183B1 (en) * | 2006-10-14 | 2006-12-15 | (주)정도엔지니어링 | Vegetation block with equipment structure |
| KR20090081861A (en) * | 2008-01-25 | 2009-07-29 | 주식회사 아썸 | An inhabitant of shellfish and a system for the quality of water purification |
| CN103015382A (en) * | 2012-12-28 | 2013-04-03 | 镇江山水湾生态农业开发有限公司 | Agricultural non-point source pollution ecological intercepting ditch |
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| CN210636383U (en) * | 2019-05-28 | 2020-05-29 | 中国电建集团华东勘测设计研究院有限公司 | Debris flow blocking dam with slag removal and drainage channel |
| CN112875868A (en) * | 2021-03-02 | 2021-06-01 | 安徽农业大学 | Method for solving agricultural non-point source pollution |
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