WO2016119298A1 - Water-saving and pollution-reducing method for water circulation use in irrigation and drainage coupled ecological irrigation district in flat areas - Google Patents
Water-saving and pollution-reducing method for water circulation use in irrigation and drainage coupled ecological irrigation district in flat areas Download PDFInfo
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- WO2016119298A1 WO2016119298A1 PCT/CN2015/075502 CN2015075502W WO2016119298A1 WO 2016119298 A1 WO2016119298 A1 WO 2016119298A1 CN 2015075502 W CN2015075502 W CN 2015075502W WO 2016119298 A1 WO2016119298 A1 WO 2016119298A1
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- irrigation
- water
- drainage
- ecological
- wetland
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Links
- 238000003973 irrigation Methods 0.000 title claims abstract description 137
- 230000002262 irrigation Effects 0.000 title claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000000746 purification Methods 0.000 claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 13
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 235000015097 nutrients Nutrition 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 11
- 239000011574 phosphorus Substances 0.000 claims abstract description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 7
- 239000000575 pesticide Substances 0.000 claims abstract description 6
- 230000006378 damage Effects 0.000 claims abstract description 5
- 239000013049 sediment Substances 0.000 claims abstract description 4
- 241000196324 Embryophyta Species 0.000 claims description 23
- 238000004064 recycling Methods 0.000 claims description 12
- 239000003621 irrigation water Substances 0.000 claims description 11
- 238000005086 pumping Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000001788 irregular Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 244000205574 Acorus calamus Species 0.000 claims description 3
- 235000011996 Calamus deerratus Nutrition 0.000 claims description 3
- 241001465754 Metazoa Species 0.000 claims description 3
- 244000273256 Phragmites communis Species 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000003657 drainage water Substances 0.000 claims 6
- 241000209495 Acorus Species 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000010902 straw Substances 0.000 claims 1
- 238000003809 water extraction Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 13
- 239000003337 fertilizer Substances 0.000 description 11
- 230000033228 biological regulation Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 241001244577 Myriophyllum spicatum Species 0.000 description 2
- 244000126014 Valeriana officinalis Species 0.000 description 2
- 235000013832 Valeriana officinalis Nutrition 0.000 description 2
- 235000016788 valerian Nutrition 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000447 pesticide residue Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Definitions
- the present invention relates to a water-saving and pollution-reducing method suitable for water recycling of irrigation and drainage in an ecological irrigation district in a plain area. It belongs to the field of farmland irrigation and irrigation.
- the ecological irrigation area mainly means that the engineering system in the irrigation area can be coordinated with the natural environment, the water quantity is guaranteed, the water quality can self-purify and maintain a good cycle, and the water resources can provide support for social and economic development and continue to use it.
- Its construction requires rational adjustment of agricultural product structure, scientific application of chemical fertilizers and pesticides, development of scientific irrigation and drainage schemes, implementation of effective water recycling measures, reduction of pollution of surface water sources, especially the development of ecological measures into irrigation areas in lake basins.
- Practice has proved that the construction of ecological irrigation districts can effectively improve the utilization efficiency of water resources and fertilizers, increase the biodiversity of irrigation districts, and reduce pollution emissions. It has become an essential engineering technology for agricultural production and ecological environment protection in China.
- the irrigation area can completely treat the farmland drainage and reuse it.
- the construction technology of ecological irrigation districts did not coordinate the relationship between efficient use of water resources and water purification and pollution reduction, which made its application greatly restricted.
- the invention provides a water-saving and pollution-reducing method suitable for water recycling in a greenhouse irrigation area in a plain area, the purpose of which is to overcome the shortcomings of the traditional construction area on the ecological environment and overcome the shortcomings of the construction technology.
- Insufficient through the construction of submerged plant belt and ecological wetland purification island system in the wetland reservoir to purify the field drainage, reduce the pollution of the effluent to the river and lake water body; during the irrigation period, return the treated water body to the irrigation area through the pumping station Reuse, ways to improve the efficiency of water and fertilizer use. It can couple the irrigation and drainage processes in the ecological irrigation area, reduce the impact of farmland non-point source pollutants on rivers and lakes, and improve the comprehensive utilization efficiency of resources in ecological water-saving irrigation areas.
- the technical solution of the invention a water-saving and pollution-reducing method suitable for water circulation utilization of irrigation and drainage in a plain ecological irrigation area, characterized in that: a drainage period of a sub-irrigation area and a water demand period of an irrigation area; wherein the drainage period of the irrigation area is The field drainage enters the circulation regulation wetland reservoir through the drainage ditch, and intercepts and purifies the sediment, pesticide and heavy metal harmful substances through the submerged plant belt and the ecological wetland purification island, and treats the nitrogen and phosphorus nutrients, and reduces the efflux.
- the water demand period of the irrigation area is to be pumped from the pumping station to extract the water body in the wetland reservoir and distribute it to the irrigation area through the irrigation channel to improve the water use efficiency, wherein the residual nitrogen and phosphorus nutrients are provided. Required for crop growth.
- the method of the invention has both water purification and water saving functions, and can better manage irrigation and drainage processes.
- This invention can reduce the influence of surface non-point source pollutants on rivers and lakes, improve the utilization efficiency of irrigation water and fertilizer, and is especially suitable for the construction of ecological water-saving irrigation areas in plain areas.
- the present invention has the following advantages and benefits:
- the present invention can utilize the circulating adjustment wetland reservoir to purify and reduce the pollution of the field drainage in the irrigation area, and reduce the impact of the non-point source pollutant discharge on the rivers and lakes;
- the treatment and reuse will improve the utilization efficiency of water resources and fertilizers in the irrigation area.
- the method can improve the economic efficiency of the irrigation area and protect the ecological environment, and provide technical support for the construction of ecological water-saving irrigation areas in the plain area.
- the water demand period of the irrigation area, the water body in the irrigation and drainage reservoir can be reused in the irrigation area to save water resources and improve irrigation efficiency.
- the residual nitrogen and phosphorus nutrients in the water body can be used for crop growth, and the fertilizer is improved. usage efficiency.
- the irrigation main channel enters the branch channel through the aqueduct, and does not interfere with the drainage ditch; the metering control gate can regulate and control the water quantity and save water resources.
- the circulating adjustment wetland reservoir is transformed from a natural pond or a depression, reducing construction and facilitating the promotion of facilities.
- FIG. 1 is a schematic view showing the overall arrangement of a water-saving and pollution-reducing method suitable for water recycling in an ecological irrigation area coupled with irrigation and drainage in a plain area.
- FIG. 2 is a schematic plan view of a circular arrangement of a wetland reservoir.
- FIG. 3 is a top plan view of an irrigation ditch node.
- [0018] 1 in the figure is a circulating adjustment wetland reservoir
- 2 is a lifting pump station
- 3 is a irrigation main channel
- 4 is a metering control gate
- 5 is an irrigation branch channel
- 6 is an irrigation canal
- 7 is a drainage trench
- 8 is a drainage branch Ditch
- 9 is the drain dry ditch
- 10 is Tianyi Road
- 11 is the canal bridge
- 12 is the irrigation area
- 13 is the aqueduct
- 14 is the fence grille
- 15 is the submerged plant belt
- 16 is the ecological wetland purification island
- 17 is the stone cage dam
- 18 is the rockfill dam
- 19 It is a drainage gate brake.
- the water demand period of the irrigation area is selected by the pumping station 2 to extract the water body in the circulating wetland reservoir 1 and distribute it to the irrigation field through the irrigation channel 12 to improve the utilization efficiency of water resources, wherein residual nitrogen and phosphorus nutrients may also be used. Required for crop growth.
- the drainage ditch is composed of a drainage dry ditch 9, a drainage ditch 8 and a drain ditch 7, and the field drainage enters the drainage ditch 8 through the drain ditch 7, and finally enters the circulation regulating wetland reservoir by the drainage ditch 9 .
- the irrigation channel is composed of an irrigation main channel 3, an irrigation branch channel 5 and an irrigation bucket channel 6.
- the water body in the circulation regulation wetland reservoir is lifted by the pumping lifting pump station 2, and after entering the irrigation branch channel 5 through the irrigation main channel 3, the irrigation canal is finally completed. 6 assigned to the irrigation field 12 .
- the irrigation main channel 3 and the drainage dry channel 9 are arranged in parallel, and the irrigation water enters the irrigation branch channel 5 through the aqueduct 14; the irrigation control channel inlet is provided with a metering control gate 4 for regulating and controlling the water volume.
- the circulation regulation wetland reservoir is transformed from a natural pond or a depression, and is composed of a submerged plant belt 15 and an ecological wetland purification island 16.
- the circulation regulation wetland reservoir is connected with the receiving river and the drainage gate is provided, and the gate is closed during the drainage period of the irrigation area, and the water body is discharged or reused after being purified; the setting of the rockfill dam 18 in the reservoir can be conveniently formed.
- the mainstream of the water body is connected with the receiving river and the drainage gate is provided, and the gate is closed during the drainage period of the irrigation area, and the water body is discharged or reused after being purified; the setting of the rockfill dam 18 in the reservoir can be conveniently formed.
- the mainstream of the water body is connected with the receiving river and the drainage gate is provided, and the gate is closed during the drainage period of the irrigation area, and the water body is discharged or reused after being purified; the setting of the rockfill dam 18 in the reservoir can be conveniently formed. The mainstream of the water body.
- the submerged plant belt 15 is composed of plants such as Myriophyllum spicatum and valerian, and the aquatic plants are regularly harvested; the wetland purification island 16 is planted with water plants such as reeds and calamus, and its shape and position are irregular. Thereby, the water flow is bypassed, the water body stays in the daytime and the purification treatment effect is improved; the stone cage dam 17 is arranged between the ecological wetland purification island 16, and the biofilm formed on the surface can intercept the suspended matter and purify the harmful substances.
- the front end of the pumping lift pump station 2 is provided with a fence grill 14 for removing animal and plant residues, crop orange stalks, and domestic garbage waste.
- the irrigation canal is divided into an irrigation main canal 3, an irrigation branch canal 5 and an irrigation canal 6 according to different levels; the irrigation canal 3 is connected with the circulating regulation wetland reservoir 1 , and the irrigation water is passed through the irrigation main canal 3 into the irrigation branch channel 5 Finally, it is distributed to the farmland 12 by the irrigation canal 6.
- the drainage ditch is divided into drainage dry ditch 9, drainage ditch 8 and drain ditch 7; after the drainage through the drainage ditch 7 enters the drainage ditch 8, the drainage ditch 9 is finally transferred to the circulating regulating wetland reservoir 1 .
- the irrigation main channel 3 and the drainage dry channel 9 are arranged in parallel with each other along the field road 10, and do not interfere with each other; the road 10 crosses the transition groove 13 through the channel bridge 11; the irrigation water enters the irrigation branch channel 5 through the aqueduct 13, and is irrigated
- a metering control gate 4 is provided at the entrance of the branch channel to regulate and control the amount of water.
- the circulating adjustment wetland reservoir 1 is transformed from a natural pond or a depression, and may exist alone or in series by a plurality of reforming systems, mainly including a submerged plant belt 15 and an ecological wetland purification island system.
- the submerged plant belt 15 is composed of Myriophyllum spicatum, valerian, etc., and the aquatic plants are harvested regularly.
- the ecological wetland purification island 16 is planted with water plants such as reeds and calamus, which are irregular in shape and position, increasing water flow and improving The water body stays in the daytime and the purification effect; the ecological wetland purification island 16 is provided with a stone cage dam 17, and the biofilm formed on the surface can intercept the suspended matter and purify the harmful substances.
- the circulation regulation wetland reservoir 1 is connected with the receiving river lake, and a throttle gate 19 is arranged near the water outlet, and the gate is closed during the drainage period, and the water body is discharged or reused after being purified, and the central rockfill dam 18 of the reservoir can be set up. It is convenient to form the mainstream of the water body.
- a pumping lift pump station 2 at the entrance of the irrigation main canal 3. After the treatment, the water body enters the farmland of the irrigation area 12 for reuse.
- the front end of the pumping station 2 is provided with a fence grille 14 for removing wastes such as animal and plant residues, crop stalks, and domestic garbage.
- the invention can reduce the influence of the non-point source pollutant discharge on the river and lake water body, and improve the water resource and fertilizer utilization efficiency, which can better coordinate the water resource allocation in the irrigation area and save the fertilizer application amount, and realize the ecological water saving. Sustainable development of agriculture in irrigation districts.
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Hydroponics (AREA)
Abstract
A water-saving and pollution-reducing method for irrigation and drainage coupled water circulation use suitable for a flat ecological irrigation district, wherein an irrigation district drainage period and an irrigation district water need period are comprised; during the irrigation district drainage period, field drained water enters a cyclically-adjusting wetland reservoir (1) through a drainage ditch, sediments, pesticides and harmful heavy-metal substances are intercepted and purified through a submerged plant zone (15) and an ecological wetland purification island (16) system, and nitrogen and phosphorus nutrient substances are treated, thus reducing the damage done by drainage to the bodies of water of rivers and lakes; during the irrigation district water need period, bodies of water in the cyclically-adjusting wetland reservoir (1) are extracted by a water extraction pump (2) and distributed to irrigation district farmlands (12), thus increasing the utilization efficiency of water resources, wherein the residual nitrogen and phosphorus nutrient substances may also be needed for the growth parts of crops.
Description
平原地区灌排耦合生态型灌区水循环利用的节水减污方 法 Water-saving and pollution-reducing method for water recycling in irrigation and drainage combined ecological irrigation area in plain area
技术领域 Technical field
[0001] 本发明涉及的是一种适用于平原地区生态型灌区中灌排耦合的水循环利用的节 水减污方法。 属于农田水利灌溉领域。 [0001] The present invention relates to a water-saving and pollution-reducing method suitable for water recycling of irrigation and drainage in an ecological irrigation district in a plain area. It belongs to the field of farmland irrigation and irrigation.
背景技术 Background technique
[0002] 我国是农业大国， 灌溉事业始终随着社会经济的发展而得以发展， 灌区以其特 殊的地理位置、 优越的水资源条件， 在提高土地生产力、 满足人们生活需要和 发展区域经济中具有重要作用。 然而， 传统灌区往往单纯以追求农产品的产量 和产值为目标而忽视生态环境的保护， 如水资源的过度幵发、 较低的水肥利用 率、 化肥的大量施用和污染物质排放等。 灌区内大量废 （污） 水的存在和引用 ， 严重影响了灌区生态***， 土壤板结、 碱化， 作物性状降低、 减产甚至绝收 ， 重金属污染还会引发食品安全问题。 农田地表径流中的氮、 磷等营养物质造 成的农田面源污染更已成为河湖等水域富营养化的主要污染源。 [0002] China is a big agricultural country. The irrigation industry has always developed along with the development of social economy. With its special geographical position and superior water resources conditions, the irrigation area has the advantages of improving land productivity, meeting people's living needs and developing regional economy. Important role. However, traditional irrigation districts often neglect the protection of ecological environment by pursuing the output and output value of agricultural products, such as excessive water resources, low water and fertilizer utilization, large-scale application of chemical fertilizers and pollutant emissions. The existence and citation of a large amount of waste (sewage) water in the irrigation area has seriously affected the irrigation area ecosystem, soil compaction, alkalization, crop trait reduction, yield reduction and even harvest. Heavy metal pollution may also cause food safety problems. The non-point source pollution caused by nitrogen, phosphorus and other nutrients in the surface runoff of farmland has become the main source of eutrophication in rivers and lakes.
[0003] 近年来， 为了更好地协调灌区的水资源配置， 实现灌区农业的可持续发展， 国 内外学者对"生态灌区"的构建模式幵展了大量研究。 生态灌区主要指灌区内的工 程体系能与自然环境协调一致， 水量有保证， 水质能实现自我净化并保持良好 循环， 水资源能为社会经济发展提供支撑， 并持续利用下去。 它的建设要求合 理调整农业产品结构， 科学施用化肥农药、 制定科学的灌排方案， 实施有效水 体循环利用措施， 减少面源对水体的污染， 特别是制定入湖流域灌区的生态措 施。 实践证明， 生态灌区建设可以有效提高水资源和化肥农药的利用效率、 提 高灌区生物多样性、 减少污染排放， 它已成为我国农业生产和生态环境保护的 必需工程技术。 [0003] In recent years, in order to better coordinate the water resources allocation in irrigation districts and realize the sustainable development of irrigation district agriculture, domestic and foreign scholars have carried out a lot of research on the construction mode of "ecological irrigation districts". The ecological irrigation area mainly means that the engineering system in the irrigation area can be coordinated with the natural environment, the water quantity is guaranteed, the water quality can self-purify and maintain a good cycle, and the water resources can provide support for social and economic development and continue to use it. Its construction requires rational adjustment of agricultural product structure, scientific application of chemical fertilizers and pesticides, development of scientific irrigation and drainage schemes, implementation of effective water recycling measures, reduction of pollution of surface water sources, especially the development of ecological measures into irrigation areas in lake basins. Practice has proved that the construction of ecological irrigation districts can effectively improve the utilization efficiency of water resources and fertilizers, increase the biodiversity of irrigation districts, and reduce pollution emissions. It has become an essential engineering technology for agricultural production and ecological environment protection in China.
[0004] 在国内外灌区建设和演变的基础上， 学者们从灌排***水资源循环利用模式、 灌区景观布局、 沟渠空间形态构建、 沟渠防渗技术及生态化形式以及灌区调蓄 塘库形态等方面， 对生态型灌区的构建模式进行了探讨。 如在输水渠道中采用
生态护岸技术， 减小水流冲击和水体入渗提高水资源的利用率； 构建田间排水 沟和积水塘以构建屏障， 对农田面源污染进行截留。 然而， 目前的工程技术往 往单独针对节水灌溉或减污排水过程， 缺乏耦合两者的综合性工程方法研究。 如在部分地区， 灌区田间排水若直接进入河湖， 不仅会造成氮、 磷等营养物和 化肥资源的浪费， 水体中的农药、 重金属等有害物质也会对受纳水体造成严重 危害。 为了提高生产效率和经济效率， 灌区完全可以对农田排水进行处理后再 利用。 以往生态灌区构建技术并未协调好水资源高效利用和水体净化减污的关 系， 这使得其应用受到了很大的限制。 [0004] On the basis of the construction and evolution of irrigation districts at home and abroad, scholars from the irrigation and drainage system water resources recycling model, irrigation district landscape layout, trench space shape construction, ditches anti-seepage technology and ecological forms and irrigation district reservoir pond form In other aspects, the construction mode of ecological irrigation districts is discussed. If used in water delivery channels Ecological revetment technology, reducing water flow impact and water infiltration to improve the utilization of water resources; Constructing drainage ditches and reservoirs to build barriers to intercept non-point source pollution. However, current engineering techniques often focus on water-saving irrigation or pollution-reducing drainage processes alone, lacking a comprehensive engineering approach to coupling the two. For example, in some areas, if the field drainage in the irrigation area directly enters the river and lake, it will not only cause the waste of nutrients and fertilizer resources such as nitrogen and phosphorus, but also harmful substances such as pesticides and heavy metals in the water body will cause serious harm to the receiving water body. In order to improve production efficiency and economic efficiency, the irrigation area can completely treat the farmland drainage and reuse it. In the past, the construction technology of ecological irrigation districts did not coordinate the relationship between efficient use of water resources and water purification and pollution reduction, which made its application greatly restricted.
技术问题 technical problem
[0005] 本发明提出的是一种适用于平原地区生态型灌区中灌排耦合的水循环利用的节 水减污方法， 其目的在于针对传统灌区对生态环境的影响， 克服其构建技术的 缺点和不足， 通过在湿地水库中构建沉水植物带和生态湿地净化岛***对田间 排水进行净化， 减小外排对河湖水体的污染； 在灌溉期， 通过抽水泵站将处理 后水体返回灌区进行再利用， 提高水资源和化肥利用效率的方法。 能够耦合生 态灌区中的灌溉和排水过程， 减少农田面源污染物外排对河湖水体的影响， 提 高生态节水灌区中资源的综合利用效率。 [0005] The invention provides a water-saving and pollution-reducing method suitable for water recycling in a greenhouse irrigation area in a plain area, the purpose of which is to overcome the shortcomings of the traditional construction area on the ecological environment and overcome the shortcomings of the construction technology. Insufficient, through the construction of submerged plant belt and ecological wetland purification island system in the wetland reservoir to purify the field drainage, reduce the pollution of the effluent to the river and lake water body; during the irrigation period, return the treated water body to the irrigation area through the pumping station Reuse, ways to improve the efficiency of water and fertilizer use. It can couple the irrigation and drainage processes in the ecological irrigation area, reduce the impact of farmland non-point source pollutants on rivers and lakes, and improve the comprehensive utilization efficiency of resources in ecological water-saving irrigation areas.
问题的解决方案 Problem solution
技术解决方案 Technical solution
[0006] 本发明的技术解决方案： 适用于平原型生态灌区中灌排耦合的水循环利用的节 水减污方法， 其特征在于： 分灌区排水期、 灌区需水期； 其中灌区排水期是将 田间排水通过排水沟进入循环调节湿地水库， 通过沉水植物带和生态湿地净化 岛对泥沙和农药、 重金属有害物质进行截留、 净化， 并对其中氮、 磷营养物质 进行处理， 减小外排对河湖水体的危害； 所述灌区需水期是由抽水泵站将循环 调节湿地水库内水体抽取并通过灌水渠分配至灌区农田， 提高水资源利用效率 ， 其中残留的氮、 磷营养物质供作物生长部分所需。 [0006] The technical solution of the invention: a water-saving and pollution-reducing method suitable for water circulation utilization of irrigation and drainage in a plain ecological irrigation area, characterized in that: a drainage period of a sub-irrigation area and a water demand period of an irrigation area; wherein the drainage period of the irrigation area is The field drainage enters the circulation regulation wetland reservoir through the drainage ditch, and intercepts and purifies the sediment, pesticide and heavy metal harmful substances through the submerged plant belt and the ecological wetland purification island, and treats the nitrogen and phosphorus nutrients, and reduces the efflux. Harm to the water body of the river; the water demand period of the irrigation area is to be pumped from the pumping station to extract the water body in the wetland reservoir and distribute it to the irrigation area through the irrigation channel to improve the water use efficiency, wherein the residual nitrogen and phosphorus nutrients are provided. Required for crop growth.
发明的有益效果 Advantageous effects of the invention
有益效果 Beneficial effect
[0007] 本发明方法兼具水质净化和节水功能， 能较好地管理灌溉与排水过程。 本发明
方法能够减少农田面源污染物外排对河湖水体的影响， 提高灌溉水和化肥的利 用效率， 尤其适用于平原地区生态型节水灌区的建设。 [0007] The method of the invention has both water purification and water saving functions, and can better manage irrigation and drainage processes. this invention The method can reduce the influence of surface non-point source pollutants on rivers and lakes, improve the utilization efficiency of irrigation water and fertilizer, and is especially suitable for the construction of ecological water-saving irrigation areas in plain areas.
[0008] 与现有技术相比， 本发明具有如下优点和有益效果： Compared with the prior art, the present invention has the following advantages and benefits:
[0009] 1、 与现有技术相比， 本发明能够利用循环调节湿地水库对灌区田间排水进行 净化减污， 减小农田面源污染物外排对河流和湖泊造成的影响； 并通过对水体 的处理再利用， 提高灌区水资源及化肥的利用效率。 该方法能提高灌区经济效 益并保护生态环境， 为平原地区生态节水灌区的建设提供技术支持。 [0009] 1. Compared with the prior art, the present invention can utilize the circulating adjustment wetland reservoir to purify and reduce the pollution of the field drainage in the irrigation area, and reduce the impact of the non-point source pollutant discharge on the rivers and lakes; The treatment and reuse will improve the utilization efficiency of water resources and fertilizers in the irrigation area. The method can improve the economic efficiency of the irrigation area and protect the ecological environment, and provide technical support for the construction of ecological water-saving irrigation areas in the plain area.
[0010] 2、 灌区排水期， 田间排水经排水沟进入循环调节湿地水库， 通过沉水植物带 和生态湿地净化岛***对其中的农药残留物、 重金属等有害物质进行截留、 净 化， 减小外排对河湖水体的污染。 [0010] 2. During the drainage period of the irrigation area, the field drainage enters the circulation regulation wetland reservoir through the drainage ditch, and the harmful substances such as pesticide residues and heavy metals are intercepted and purified by the submerged plant belt and the ecological wetland purification island system. Drain the pollution of rivers and lakes.
[0011] 3、 循环调节湿地水库中生态湿地净化岛的形状和位置不规则， 从而增加水流 绕行， 提高水体停留吋间和净化处理效果； 湿地净化岛之间设有石笼坝， 其表 面形成的生物膜可拦截悬浮物、 净化有害物质。 [0011] 3, cyclically adjust the shape and position of the ecological wetland purification island in the wetland reservoir is irregular, thereby increasing the water flow bypass, improving the water body retention time and purification treatment effect; the wetland purification island is provided with a stone cage dam, the surface thereof The formed biofilm can intercept suspended matter and purify harmful substances.
[0012] 4、 灌区需水期， 循环调节湿地水库内水体可回用于灌区， 节约水资源， 提高 灌溉效率， 水体中残留的氮、 磷等营养物质可供作物生长部分所需， 提高化肥 利用效率。 [0012] 4. The water demand period of the irrigation area, the water body in the irrigation and drainage reservoir can be reused in the irrigation area to save water resources and improve irrigation efficiency. The residual nitrogen and phosphorus nutrients in the water body can be used for crop growth, and the fertilizer is improved. usage efficiency.
[0013] 5、 灌水干渠通过渡槽进入支渠， 与排水沟不干扰； 计量控制闸可以调节、 控 制水量， 节约水资源。 [0013] 5. The irrigation main channel enters the branch channel through the aqueduct, and does not interfere with the drainage ditch; the metering control gate can regulate and control the water quantity and save water resources.
[0014] 6、 循环调节湿地水库由自然水塘或洼地改造而成， 减少施工， 便于推广设施 [0014] 6. The circulating adjustment wetland reservoir is transformed from a natural pond or a depression, reducing construction and facilitating the promotion of facilities.
对附图的简要说明 Brief description of the drawing
附图说明 DRAWINGS
[0015] 图 1是适用于平原地区灌排耦合的生态型灌区中水循环利用的节水减污方法整 体布置示意图。 [0015] FIG. 1 is a schematic view showing the overall arrangement of a water-saving and pollution-reducing method suitable for water recycling in an ecological irrigation area coupled with irrigation and drainage in a plain area.
[0016] 图 2是循环调节湿地水库的平面布置示意图。 2 is a schematic plan view of a circular arrangement of a wetland reservoir.
[0017] 图 3是灌溉沟渠节点的俯视图。 [0017] FIG. 3 is a top plan view of an irrigation ditch node.
[0018] 图中的 1是循环调节湿地水库、 2是提升泵站、 3是灌水干渠、 4是计量控制闸、 5是灌溉支渠、 6是灌溉斗渠、 7是排水斗沟、 8是排水支沟、 9是排水干沟、 10是
田埂道路、 11是渠桥、 12是灌区田地、 13是渡槽、 14是围栏格栅、 15是沉水植 物带、 16是生态湿地净化岛， 17是石笼坝， 18是堆石坝， 19是排水节制闸。 [0018] 1 in the figure is a circulating adjustment wetland reservoir, 2 is a lifting pump station, 3 is a irrigation main channel, 4 is a metering control gate, 5 is an irrigation branch channel, 6 is an irrigation canal, 7 is a drainage trench, 8 is a drainage branch Ditch, 9 is the drain dry ditch, 10 is Tianyi Road, 11 is the canal bridge, 12 is the irrigation area, 13 is the aqueduct, 14 is the fence grille, 15 is the submerged plant belt, 16 is the ecological wetland purification island, 17 is the stone cage dam, 18 is the rockfill dam, 19 It is a drainage gate brake.
具体实施方式 detailed description
[0019] 一种适用于平原型生态灌区中灌排耦合的水循环利用的节水减污方法， 分灌区 排水期、 灌区需水期； 其中灌区排水期是将田间排水通过排水沟进入循环调节 湿地水库 1， 通过沉水植物带 15和生态湿地净化岛 16对泥沙和农药、 重金属有害 物质进行截留、 净化， 并对其中氮、 磷营养物质进行处理， 减小外排对河湖水 体的危害。 [0019] A water-saving and pollution-reducing method suitable for irrigation and drainage in a plain ecological irrigation area, a drainage period in a sub-irrigation area, and a water demand period in an irrigation area; wherein the drainage period in the irrigation area is to pass the field drainage through the drainage ditch into the circulating adjustment wetland Reservoir 1, through the submerged plant belt 15 and ecological wetland purification island 16 to intercept and purify sediment, pesticides and heavy metal hazardous substances, and treat nitrogen and phosphorus nutrients, reduce the damage of efflux to rivers and lakes .
[0020] 所述灌区需水期是由抽水泵站 2将循环调节湿地水库 1内水体抽取并通过灌水渠 分配至灌区农田 12， 提高水资源利用效率， 其中残留的氮、 磷营养物质也可供 作物生长部分所需。 [0020] The water demand period of the irrigation area is selected by the pumping station 2 to extract the water body in the circulating wetland reservoir 1 and distribute it to the irrigation field through the irrigation channel 12 to improve the utilization efficiency of water resources, wherein residual nitrogen and phosphorus nutrients may also be used. Required for crop growth.
[0021] 所述排水沟由排水干沟 9、 排水支沟 8和排水斗沟 7组成， 田间排水经排水斗沟 7 进入排水支沟 8后， 最终由排水干沟 9进入循环调节湿地水库 1。 [0021] The drainage ditch is composed of a drainage dry ditch 9, a drainage ditch 8 and a drain ditch 7, and the field drainage enters the drainage ditch 8 through the drain ditch 7, and finally enters the circulation regulating wetland reservoir by the drainage ditch 9 .
[0022] 所述灌水渠由灌溉干渠 3、 灌溉支渠 5和灌溉斗渠 6组成， 循环调节湿地水库中 的水体由抽水提升泵站 2提升， 经灌溉干渠 3进入灌溉支渠 5后， 最终由灌溉斗渠 6分配至灌区农田 12。 [0022] The irrigation channel is composed of an irrigation main channel 3, an irrigation branch channel 5 and an irrigation bucket channel 6. The water body in the circulation regulation wetland reservoir is lifted by the pumping lifting pump station 2, and after entering the irrigation branch channel 5 through the irrigation main channel 3, the irrigation canal is finally completed. 6 assigned to the irrigation field 12 .
[0023] 所述灌水干渠 3和排水干沟 9平行布置， 灌溉水通过渡槽 14进入灌溉支渠 5; 灌 溉支渠入口设有计量控制闸 4， 用以调节、 控制水量。 [0023] The irrigation main channel 3 and the drainage dry channel 9 are arranged in parallel, and the irrigation water enters the irrigation branch channel 5 through the aqueduct 14; the irrigation control channel inlet is provided with a metering control gate 4 for regulating and controlling the water volume.
[0024] 所述循环调节湿地水库由自然水塘或洼地改造而成， 由沉水植物带 15和生态湿 地净化岛 16组成。 [0024] The circulation regulation wetland reservoir is transformed from a natural pond or a depression, and is composed of a submerged plant belt 15 and an ecological wetland purification island 16.
[0025] 所述循环调节湿地水库与受纳河湖相连并设有排水节制闸， 灌区排水期闸门关 闭， 水体经净化处理后方排出或进行再利用； 水库中堆石坝 18的设置可便于形 成水体主流向。 [0025] The circulation regulation wetland reservoir is connected with the receiving river and the drainage gate is provided, and the gate is closed during the drainage period of the irrigation area, and the water body is discharged or reused after being purified; the setting of the rockfill dam 18 in the reservoir can be conveniently formed. The mainstream of the water body.
[0026] 所述沉水植物带 15由狐尾藻、 菹草等植物构成， 定期对水生植物进行收割； 生 态湿地净化岛 16上种植芦苇、 菖蒲等挺水植物， 其形状和位置不规则， 从而增 加水流绕行、 提高水体停留吋间和净化处理效果； 生态湿地净化岛 16之间设有 石笼坝 17， 其表面形成的生物膜可拦截悬浮物、 净化有害物质。
[0027] 所述抽水提升泵站 2前端设有围栏格栅 14， 用以去除动植物残体、 作物桔秆、 生活垃圾废弃物。 [0026] The submerged plant belt 15 is composed of plants such as Myriophyllum spicatum and valerian, and the aquatic plants are regularly harvested; the wetland purification island 16 is planted with water plants such as reeds and calamus, and its shape and position are irregular. Thereby, the water flow is bypassed, the water body stays in the daytime and the purification treatment effect is improved; the stone cage dam 17 is arranged between the ecological wetland purification island 16, and the biofilm formed on the surface can intercept the suspended matter and purify the harmful substances. [0027] The front end of the pumping lift pump station 2 is provided with a fence grill 14 for removing animal and plant residues, crop orange stalks, and domestic garbage waste.
[0028] 下面结合附图进一步详细描述本发明技术方案， [0028] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings.
[0029] 如图 1所示， 灌溉渠根据不同级别， 分为灌溉干渠 3、 灌溉支渠 5和灌溉斗渠 6; 灌溉斗渠 3与循环调节湿地水库 1相连， 灌溉用水经灌溉干渠 3进入灌溉支渠 5后 ， 最终由灌溉斗渠 6分配至农田 12。 排水沟根据不同级别， 分为排水干沟 9、 排 水支沟 8和排水斗沟 7; 田间排水经排水斗沟 7进入排水支沟 8后， 最终由排水干 沟 9汇入循环调节湿地水库 1。 [0029] As shown in FIG. 1 , the irrigation canal is divided into an irrigation main canal 3, an irrigation branch canal 5 and an irrigation canal 6 according to different levels; the irrigation canal 3 is connected with the circulating regulation wetland reservoir 1 , and the irrigation water is passed through the irrigation main canal 3 into the irrigation branch channel 5 Finally, it is distributed to the farmland 12 by the irrigation canal 6. According to different grades, the drainage ditch is divided into drainage dry ditch 9, drainage ditch 8 and drain ditch 7; after the drainage through the drainage ditch 7 enters the drainage ditch 8, the drainage ditch 9 is finally transferred to the circulating regulating wetland reservoir 1 .
[0030] 如图 2所示， 灌水干渠 3和排水干沟 9相隔田埂道路 10平行布置， 互不干扰； 道 路 10通过渠桥 11跨过渡槽 13; 灌溉水通过渡槽 13进入灌溉支渠 5， 灌溉支渠入口 设有计量控制闸 4， 用以调节、 控制水量。 [0030] As shown in FIG. 2, the irrigation main channel 3 and the drainage dry channel 9 are arranged in parallel with each other along the field road 10, and do not interfere with each other; the road 10 crosses the transition groove 13 through the channel bridge 11; the irrigation water enters the irrigation branch channel 5 through the aqueduct 13, and is irrigated A metering control gate 4 is provided at the entrance of the branch channel to regulate and control the amount of water.
[0031] 如图 3所示， 循环调节湿地水库 1由自然水塘或洼地改造而成， 可单独存在或者 由多个改造***串联而成， 主要包括沉水植物带 15和生态湿地净化岛***。 沉 水植物带 15由狐尾藻、 菹草等构成， 定期对水生植物进行收割； 生态湿地净化 岛 16上种植芦苇、 菖蒲等挺水植物， 其形状和位置不规则， 增加水流绕行， 提 高水体停留吋间和处理净化效果； 生态湿地净化岛 16之间设有石笼坝 17， 其表 面形成的生物膜可拦截悬浮物、 净化有害物质。 [0031] As shown in FIG. 3, the circulating adjustment wetland reservoir 1 is transformed from a natural pond or a depression, and may exist alone or in series by a plurality of reforming systems, mainly including a submerged plant belt 15 and an ecological wetland purification island system. . The submerged plant belt 15 is composed of Myriophyllum spicatum, valerian, etc., and the aquatic plants are harvested regularly. The ecological wetland purification island 16 is planted with water plants such as reeds and calamus, which are irregular in shape and position, increasing water flow and improving The water body stays in the daytime and the purification effect; the ecological wetland purification island 16 is provided with a stone cage dam 17, and the biofilm formed on the surface can intercept the suspended matter and purify the harmful substances.
[0032] 循环调节湿地水库 1与受纳河湖相连， 在排水口附近设有节制闸 19， 排水期闸 门关闭， 水体经净化处理后方排出或进行再利用， 水库中央堆石坝 18的设置可 便于形成水体主流向。 [0032] The circulation regulation wetland reservoir 1 is connected with the receiving river lake, and a throttle gate 19 is arranged near the water outlet, and the gate is closed during the drainage period, and the water body is discharged or reused after being purified, and the central rockfill dam 18 of the reservoir can be set up. It is convenient to form the mainstream of the water body.
[0033] 灌溉干渠 3入口处设有抽水提升泵站 2， 抽取处理后水体进入灌区农田 12进行再 利用。 泵站 2前端设有围栏格栅 14， 用以去除动植物残体、 作物桔秆、 生活垃圾 等废弃物。 [0033] There is a pumping lift pump station 2 at the entrance of the irrigation main canal 3. After the treatment, the water body enters the farmland of the irrigation area 12 for reuse. The front end of the pumping station 2 is provided with a fence grille 14 for removing wastes such as animal and plant residues, crop stalks, and domestic garbage.
[0034] 本发明能够减少农田面源污染物外排对河湖水体的影响， 提高水资源和化肥利 用效率， 这能较好地协调灌区的水资源配置和节约化肥施用量， 实现生态节水 灌区农业的可持续发展。
[0034] The invention can reduce the influence of the non-point source pollutant discharge on the river and lake water body, and improve the water resource and fertilizer utilization efficiency, which can better coordinate the water resource allocation in the irrigation area and save the fertilizer application amount, and realize the ecological water saving. Sustainable development of agriculture in irrigation districts.
Claims
权利要求书 claims
一种适用于平原型生态灌区中灌排耦合的水循环利用的节水减污方法 ， 其特征是分灌区排水期、 灌区需水期； 其中灌区排水期是将田间排 水通过排水沟进入循环调节湿地水库， 通过沉水植物带和生态湿地净 化岛对泥沙和农药、 重金属有害物质进行截留、 净化， 并对其中氮、 磷营养物质进行处理， 减小外排对河湖水体的危害； 所述灌区需水期 是由抽水泵站将循环调节湿地水库内水体抽取并通过灌水渠分配至灌 区农田， 提高水资源利用效率， 其中残留的氮、 磷营养物质供作物生 长部分所需。 A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas, which is characterized by dividing the irrigation area into a drainage period and an irrigation area water demand period; in the irrigation area drainage period, the field drainage enters the circulation regulating wetland through the drainage ditch. The reservoir intercepts and purifies harmful substances such as sediment, pesticides, and heavy metals through submerged plant belts and ecological wetland purification islands, and processes nitrogen and phosphorus nutrients in them to reduce the harm of efflux to rivers and lakes; described During the water demand period in the irrigation area, the water pumping station extracts water from the cyclically regulated wetland reservoir and distributes it to the farmland in the irrigation area through irrigation canals to improve water resource utilization efficiency. The remaining nitrogen and phosphorus nutrients are partially needed for crop growth.
根据权利要求 1所述的一种适用于平原型生态灌区中灌排耦合的水循 环利用的节水减污方法， 其特征是所述排水沟由排水干沟、 排水支沟 和排水斗沟组成， 田间排水经排水斗沟进入排水支沟后， 最终由排水 干沟进入循环调节湿地水库。 A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas according to claim 1, characterized in that the drainage ditch consists of a main drainage ditch, a drainage branch ditch and a drainage bucket ditch, After field drainage enters the drainage branch ditch through the drainage bucket ditch, it finally enters the circulating regulating wetland reservoir from the main drainage ditch.
根据权利要求 1所述的一种适用于平原型生态灌区中灌排耦合的水循 环利用的节水减污方法， 其特征是所述灌水渠由灌溉干渠、 灌溉支渠 和灌溉斗渠组成， 循环调节湿地水库中的水体由抽水提升泵站提升， 经灌溉干渠进入灌溉支渠后， 最终由灌溉斗渠分配至灌区农田。 根据权利要求 3所述的一种适用于平原型生态灌区中灌排耦合的水循 环利用的节水减污方法， 其特征是所述灌溉干渠和排水干沟平行布置 ， 灌溉水通过渡槽进入灌溉支渠； 灌溉支渠入口设有计量控制闸， 用 以调节、 控制水量。 A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas according to claim 1, characterized in that the irrigation canal is composed of a main irrigation canal, an irrigation branch canal and an irrigation bucket canal, and the wetland is cyclically adjusted The water body in the reservoir is lifted by the water lifting pump station, enters the irrigation branch canal through the main irrigation canal, and is finally distributed to the farmland in the irrigation area by the irrigation bucket canal. A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas according to claim 3, characterized in that the main irrigation canal and the main drainage ditch are arranged in parallel, and the irrigation water enters the irrigation branch canal through the aqueduct. ; The entrance of the irrigation branch canal is equipped with a metering control gate to regulate and control the water volume.
根据权利要求 1所述的一种适用于平原型生态灌区中灌排耦合的水循 环利用的节水减污方法， 其特征是所述循环调节湿地水库由自然水塘 或洼地改造而成， 由沉水植物带和生态湿地净化岛组成， 循环调节湿 地水库与受纳河湖相连并设有排水节制闸， 灌区排水期闸门关闭， 水 体经净化处理后方排出或进行再利用； 水库中堆石坝的设置便于形成 水体主流向。 A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas according to claim 1, characterized in that the circulating adjustment wetland reservoir is transformed from a natural pond or depression, and is made of sedimentary water. It is composed of a water plant belt and an ecological wetland purification island. The circulating regulating wetland reservoir is connected to the receiving river and lake and is equipped with a drainage control gate. The gate is closed during the drainage period in the irrigation area, and the water body is discharged or reused after purification treatment; the rockfill dam in the reservoir Set up to facilitate the formation of the main direction of the water body.
根据权利要求 5所述的一种适用于平原型生态灌区中灌排耦合的水循
环利用的节水减污方法， 其特征是所述沉水植物带由狐尾藻、 菹草等 植物构成， 定期对水生植物进行收割； 生态湿地净化岛上种植芦苇、 菖蒲等挺水植物， 其形状和位置不规则， 从而增加水流绕行、 提高水 体停留吋间和净化处理效果； 生态湿地净化岛之间设有石笼坝， 其表 面形成的生物膜拦截悬浮物、 净化有害物质。 A water circulation system suitable for coupling irrigation and drainage in plain ecological irrigation areas according to claim 5 A water-saving and pollution-reducing method for environmental utilization, which is characterized in that the submerged plant belt is composed of Myriophylla, Acorus and other plants, and aquatic plants are harvested regularly; reeds, calamus and other emergent plants are planted on the ecological wetland purification island. Its shape and position are irregular, thereby increasing water flow detours, improving water retention time and purification treatment effect; there are gabion dams between the ecological wetland purification islands, and the biofilm formed on its surface intercepts suspended solids and purifies harmful substances.
[权利要求 7] 根据权利要求 1所述的一种适用于平原型生态灌区中灌排耦合的水循 环利用的节水减污方法， 其特征是所述抽水提升泵站前端设有围栏格 栅， 用以去除动植物残体、 作物桔秆、 生活垃圾废弃物。
[Claim 7] A water-saving and pollution-reducing method suitable for coupled irrigation and drainage water recycling in plain ecological irrigation areas according to claim 1, characterized in that a fence grille is provided at the front end of the water lifting pumping station. Used to remove animal and plant residues, crop straws, and domestic garbage.
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