CN112830642A

CN112830642A - Novel ecological ditch system for preventing and treating farmland non-point source pollution

Info

Publication number: CN112830642A
Application number: CN202110308158.5A
Authority: CN
Inventors: 田欣; 邴海健; 祝贺; 吴艳宏; 刘广龙; 王昌全; 林超文
Original assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Current assignee: Institute of Mountain Hazards and Environment IMHE of CAS
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-05-25

Abstract

The application provides a novel ecological irrigation canals and ditches system for preventing and treating farmland non-point source pollution relates to farmland non-point source pollution prevention and treatment technical field. In the present application, a novel ecological canal system includes a canal-sink structure, a first hardened canal structure, a plurality of target aquatic plant objects, and a target adsorbent fill material. The canal-pond structure is communicated with a target farmland. The first hardening canal structure and the canal-sink structure can be communicated through a first valve. The target aquatic plant objects are respectively arranged on the canal-sinking pond structure and the first hardening canal structure and are used for absorbing eutrophic substances in water flow flowing through the canal-sinking pond structure and the first hardening canal structure. The target adsorption filling material is arranged on the first hardening ditch structure and is used for absorbing eutrophic substances in water flow flowing through the first hardening ditch structure. Based on the setting, the problem of poor control effect in the prior farmland non-point source pollution control technology can be improved.

Description

Novel ecological ditch system for preventing and treating farmland non-point source pollution

Technical Field

The application relates to the technical field of farmland non-point source pollution prevention and treatment, in particular to a novel ecological ditch system for preventing and treating farmland non-point source pollution.

Background

In agricultural non-point source pollution (Rural non-point source pollution, which refers to dissolved or solid pollutants in Rural life and agricultural production activities, such as soil particles, nitrogen, phosphorus, pesticides, heavy metals, Rural livestock manure, domestic garbage and other organic or inorganic substances in a farmland, from unspecified regions, under the action of rainfall and runoff flushing, pollution caused by farmland surface runoff, farmland drainage and underground leakage, so that a large amount of pollutants enter a receiving water body, such as rivers, lakes, reservoirs, gulfs and the like) becomes an important farmland pollution source of soil and water bodies, therefore, the ecological ditch control technology is applied to reduce the content of eutrophic substances (such as nitrogen, phosphorus and the like) in the water body at the source of agricultural non-point source pollution in situ treatment, and has important significance. The farmland ditches are passages for agricultural non-point source pollutants to be discharged into downstream rivers and lakes along with agricultural sewage, and are important components of a farmland ecosystem. The ecological ditch is a novel agricultural non-point source pollution control measure with wetland property, which is constructed on the basis of the original ditch, and the interception capability of the ecological ditch on eutrophic substances can be enhanced and the water quality purification capability of the ecological ditch can be improved by reasonably configuring the ditch.

However, the inventor researches and discovers that the existing farmland non-point source pollution control technology has the problem of poor control effect on agricultural non-point source pollution.

Disclosure of Invention

In view of this, an object of the present application is to provide a novel ecological ditch system for preventing and treating non-point source pollution in farmland, so as to improve the problem of poor prevention and treatment effect existing in the existing non-point source pollution prevention and treatment technology in farmland.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

a novel ecological ditch system for preventing and treating farmland non-point source pollution, comprising:

a canal-pond structure in communication with the target farm;

a first hardened trench structure, the first hardened trench structure and the canal-pond structure being communicably disposed through a first valve, wherein the first valve is configured to control whether or not a flow of water flowing out of the target farm field to the canal-pond structure flows to the first hardened trench structure;

a plurality of target aquatic plant objects respectively disposed in the moat-plunge pool structure and the first hardened canal structure for absorbing eutrophic substances in the water flow passing through the moat-plunge pool structure and the first hardened canal structure;

and the target adsorption filling material is arranged on the first hardening ditch structure and is used for absorbing eutrophic substances in water flow flowing through the first hardening ditch structure.

In a preferred option of the embodiment of the present application, in the novel ecological ditch system for controlling farmland non-point source pollution, the target aquatic plant objects comprise canna, wild pinwheel grass and watermifoil.

In a preferred option of the embodiment of the application, in the novel ecological ditch system for preventing and treating farmland non-point source pollution, the target adsorption filling material comprises granular rape straw biochar;

wherein the grain size of the rape straw biochar is 0.2-0.5 mm.

In a preferred option of the embodiment of the present application, in the novel ecological ditch system for preventing and treating non-point source pollution of farmland, the rape straw biochar is arranged in a nylon mesh bag, and the nylon mesh bag is arranged at the end of the first hardened ditch structure in the first direction;

wherein the first direction is a direction of water flow in the first hardened trench structure.

In a preferred selection of the embodiment of the application, in the novel ecological ditch system for preventing and treating farmland non-point source pollution, the nylon mesh bag has the length of 700mm, the width of 480mm and the aperture of 0.125 mm.

In a preferred option of the embodiment of the present application, in the above novel ecological ditch system for preventing and treating non-point source pollution in farmland, the system further includes:

a plurality of ecological floating beds respectively provided to the canal-sink structure and the first hardened canal structure, and to which the target aquatic plant objects are respectively provided;

wherein, ecological bed of floating includes that network structure floats the bed and is provided with the cyclic structure who floats the subassembly and floats the bed, and this network structure floats the bed and is used for setting up the foxtail algae, and this cyclic structure floats the aquatic plant object that the bed is used for setting up the root system field planting, and this aquatic plant object includes drogue and canna indica.

a second hardened trench structure, the second hardened trench structure being communicable with the first hardened trench structure through a second valve;

the second valve is used for controlling whether the water flow in the first hardening ditch structure flows to the second hardening ditch structure or not, and when the second hardening ditch structures are multiple, the second hardening ditch structures can be arranged in a cascade connection mode through the third valve.

In a preferred option of the embodiment of the present application, in the novel ecological ditch system for controlling farmland non-point source pollution, a ratio between a sum of the floor areas of the canal-sinking pond structure, the first hardened ditch structure and the second hardened ditch structure and the floor area of the target farmland is greater than or equal to 3% and less than or equal to 5%.

a weir structure disposed in the first hardened trench structure and the second hardened trench structure for increasing a residence time of a water flow in the first hardened trench structure and the second hardened trench structure;

wherein, the overflow weir structure is a plurality of.

In a preferred option of the embodiment of the present application, in the novel ecological ditch system for preventing and treating non-point source pollution of farmland, one end of the overflow weir structure is disposed at the bottom of the first hardened ditch structure, and the other end extends in a direction close to the top of the first hardened ditch structure;

wherein the depth of the first hardened trench structure is 0.6m and the height of the weir structure is 0.12 m.

The utility model provides a novel ecological irrigation canals and ditches system for preventing and treat farmland non-point source pollution, through the cooperation setting of ditch-pond structure, first sclerosis irrigation canals and ditches structure, target aquatic plant object and target absorption filler material, can carry out effectual absorption to the eutrophication material in the rivers that flow in the target farmland to improve the prevention and treatment effect to farmland non-point source pollution, and then improve the relatively poor problem of prevention and treatment effect who exists among the current farmland non-point source pollution prevention and treatment technique, have higher practical value.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view illustrating an application of the novel ecological trench system according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a novel ecological trench system according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of an ecological floating bed provided in the embodiment of the present application.

Fig. 4 is a schematic structural diagram of an assembly body according to an embodiment of the present application.

Fig. 5 is an exploded view of a first connecting pipe according to an embodiment of the present disclosure.

Icon: 100-new ecological ditch system; 110-capillary channel-sinking pond structure; 120-a first hardened trench structure; 130-target aquatic plant objects; 140-target adsorptive filler material; 150-a weir structure; 160-a second hardened trench structure; 171-the component body; 1711-a first connecting conduit; 1711 a-a first subduct; 1711 c-a limiting structure; 1711 b-a second subduct; 1711 d-limit hole; 1712-a second connecting conduit; 1713-a third connecting conduit; 1714-a fourth connecting conduit; 172-an elastic carrier; 173-a through hole; 200-target farmland.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, the embodiment of the present application provides a novel ecological ditch system 100 for preventing and controlling non-point source pollution of farmland. The novel ecological canal system 100 includes, among other things, a canal-pond structure 110, a first hardened canal structure 120, target aquatic plant objects 130, and a target adsorbent filling material 140.

In detail, the canal-plunge structure 110 communicates with the target farm field 200 so that the water in the target farm field 200 can flow to the canal-plunge structure 110. The first hardened trench structure 120 and the canal-sinking structure 110 are disposed in communication via a first valve, which is used to control whether the water flowing out of the target farm field 200 to the canal-sinking structure 110 flows to the first hardened trench structure 120. The number of the target aquatic plant objects 130 is plural, and the plural target aquatic plant objects 130 are respectively disposed in the canal-sinking structure 110 and the first hardened canal structure 120, and are used for absorbing eutrophic substances (e.g., nitrogen and phosphorus-containing substances) in the water flow passing through the canal-sinking structure 110 and the first hardened canal structure 120. The target adsorption filling material 140 is disposed on the first hardened trench structure 120, and is used for absorbing eutrophic substances in the water flowing through the first hardened trench structure 120.

Based on this, by the matching arrangement of the rough channel-plunge pool structure 110, the first hardened channel structure 120, the target aquatic plant object 130 and the target adsorption filling material 140, eutrophic substances in water flow flowing out of the target farmland 200 can be effectively absorbed, so that the control effect on farmland non-point source pollution is improved, and the problem of poor control effect in the existing farmland non-point source pollution control technology is further improved.

In the first aspect, it should be noted that, for the canal-plunge pool structure 110, a specific structural form of the canal-plunge pool structure 110 is not limited, and may be selected according to a practical application requirement.

For example, in an alternative example, the canal-sinking structure 110 may refer to a small channel that guides the water current in the target farm field 200 to the first hardened canal structure 120, and sedimentation treatment of the water current may be performed in the course of guiding the water current.

For another example, in another alternative example, the canal-pond structure 110 may be constructed of two parts, such as a canal structure and a pond structure. Wherein the canal structure is a small channel for guiding the water flow in the target farm field 200 to the pond structure. The pond body structure is used for settling the water flow flowing out of the capillary channel structure.

Alternatively, in a specific application example, when the target farmland 200 is 45m × 50m, the cross section (a section perpendicular to the length direction) of the canal structure may be rectangular, and the dimensions of the canal structure may be 1.5m wide, 1.0m deep and 45m long.

Alternatively, in an alternative example, the trench-pond structure 110 may form a slope surface near the target farmland. Besides, cobbles can be paved on the slope surface. In this manner, the velocity of the water flow in the canal-pond structure 110 can be substantially reduced, increasing the residence time of the water flow in the canal-pond structure 110.

In the second aspect, it should be noted that, for the first hardened trench structure 120, the specific structural form of the first hardened trench structure 120 is not limited, and can be selected according to the actual application requirement.

For example, in an alternative example, the cross-section (the cross-section perpendicular to the length direction) of the first hardened trench structure 120 can be an inverted trapezoid.

Alternatively, in a specific application example, based on the aforementioned application example (the target farmland 200 is 45m by 50m), the first hardened trench structure 120 may have the dimensions of 0.6m wide at the upper bottom, 0.4m wide at the lower bottom, 0.6m deep, and 80m long.

Alternatively, the specific structure of the first hardened trench structure 120 is not limited.

For example, in an alternative example, the first hardened trench structure 120 may be laid on the basis of ecological water permeable bricks. Wherein, considering the water permeability coefficient of the ecological water permeable brick and the requirement of the release rate of calcium ions and iron ions in the ecological water permeable brick in the application of the embodiment, the aperture of the ecological water permeable brick can be smaller than 1 mm.

In addition, as an alternative example, on the basis of the above example, a layer of porous ceramsite may be further laid on the ecological water permeable brick to form a ceramsite layer. Wherein, the thickness of the ceramsite layer can be 10-15cm, and the particle size of the porous ceramsite can be 15-18 mm.

On the basis of the above example, as an alternative example, a layer of natural clinoptilolite may be laid on the ceramic particle layer to form a zeolite layer. Wherein the thickness of the zeolite layer can be 12-18cm, and the particle diameter of the natural clinoptilolite can be 6-8 mm.

In the third aspect, it should be noted that the specific type of the target aquatic plant object 130 is not limited, and can be selected according to the actual application requirements.

For example, in an alternative example, it is found through research by the inventors of the present application that canna, wild pinwheel grass, and watermifoil have characteristics of large biomass and strong nitrogen and phosphorus absorption capability, and thus, the target aquatic plant object 130 may include one or more of canna, wild pinwheel grass, and watermifoil.

Wherein, in order to facilitate the arrangement of the target aquatic plant objects 130, in the present embodiment, the novel ecological ditch system 100 may further include a plurality of ecological floating beds. Based on this, the plurality of ecological floating beds may be respectively provided to the rough channel-plunge pool structure 110 and the first hardened trench structure 120, and the target aquatic plant objects 130 are respectively provided to the plurality of ecological floating beds.

In the fourth aspect, it should be noted that, for the target adsorption filling material 140, the specific type of the target adsorption filling material 140 is not limited, and may be selected according to the actual application requirement.

For example, in an alternative example, the target adsorption packing material 140 may include granular rape straw biochar having a particle size of 0.2-0.5 mm.

In order to facilitate the setting of the rape straw biochar, in this embodiment, the novel ecological ditch system 100 may further include a nylon mesh bag. Based on this, the rape straw bio-char may be disposed in a nylon mesh bag, and the nylon mesh bag may be disposed in the first hardened trench structure 120.

In addition, in order to improve the absorption effect of the rape straw biochar on eutrophic substances in water flow, the nylon mesh bag is arranged at the end of the first hardened ditch structure 120 in a first direction, which is the direction of water flow in the first hardened ditch structure 120.

Optionally, the specific size of the nylon mesh bag is not limited, and can be selected according to the actual application requirements.

For example, in an alternative example, the nylon mesh bag may have a length of 700mm, a width of 480mm, and an aperture of 0.125 mm.

Based on the above example, in order to improve the absorption effect of eutrophic substances in the water flow, in the present embodiment, in combination with fig. 2, the novel ecological ditch system 100 may further include a plurality of overflow weir structures 150.

Wherein, in one example, a portion of the weir structure 150 is disposed at an end of the first hardened trench structure 120 in the first direction for increasing the residence time of the water flow in the first hardened trench structure 120. And, the first direction is the direction of water flow in the first hardened trench structure 120.

Optionally, the specific structure of the overflow weir structure 150 is not limited, and can be selected according to the actual application requirements.

For example, in an alternative example, one end of the weir structure 150 is disposed at the bottom of the first hardened trench structure 120, and the other end extends in a direction near the top of the first hardened trench structure 120 (i.e., may extend in the opposite direction of gravity). The depth of the first hardened trench structure 120 may be 0.6m (other parameters refer to the foregoing examples), and the height of the weir structure 150 may be 0.12 m.

On the basis of the above example, in order to improve the absorption effect of eutrophic substances in the water flow, in the present embodiment, the novel ecological ditch system 100 further includes a second hardened ditch structure 160.

The second hardened trench structure 160 and the first hardened trench structure 120 can be configured to communicate through a second valve. That is, the second valve is used to control whether the water in the first stiffening channel structure 120 flows to the second stiffening channel structure 160.

And, when there are a plurality of second hardened aqueduct structures 160, the second hardened aqueduct structures 160 are connected in series through a third valve cascade for sequentially absorbing eutrophic substances in the water flow flowing out of the first hardened aqueduct structure 120.

It is understood that each of the second hardened trench structure 160 can also be provided with the weir structure 150.

It is understood that the detailed structure of each of the second hardened trench structures 160 can refer to the foregoing explanation of the first hardened trench structure 120, and is not repeated herein.

When there is one second hardened trench structure 160, the length of the second hardened trench structure 160 may be 45m, and other parameters of the second hardened trench structure 160 may be the same as those of the first hardened trench structure 120.

On the basis of the above example, in order to enable the canal-lagoon structure 110, the first hardened canal structure 120 and the second hardened canal structure 160 to perform an effective absorption treatment of nutrient-rich substances in the water flow of the target farm field 200, the ratio between the sum of the floor areas of the canal-lagoon structure 110, the first hardened canal structure 120 and the second hardened canal structure 160 and the floor area of the target farm field 200 may be greater than or equal to 3% and less than or equal to 5%.

Optionally, in the above example, the specific structure of the ecological floating bed is not limited, and may be selected according to the actual application requirements.

For example, in an alternative example, the ecological floating bed includes a net-structure floating bed for arranging watermifoil and a ring-structure floating bed provided with a floating assembly for arranging root-planting aquatic plant objects including drooping umbrellas and canna.

Referring to fig. 3, the net-structured floating bed may include a module body 171 and an elastic support 172. Wherein, subassembly body 171 includes four connecting tubes of end to end connection, elastic bearing spare 172 set up in four connecting tubes enclose in closing the plane space that forms, and with four connecting tube fixed connection, elastic bearing spare 172 offers the through-hole 173 that is used for placing the plant. Further, at least two of the four connecting pipes which are opposite to each other are of a telescopic structure, and the telescopic structure is used for adjusting the size of the assembly body 171 to adjust the area of the elastic bearing 172. Further, the elastic bearing 172 may also be used to fix the assembly body 171 in different size states.

So design through setting up the telescopic connecting tube, can realize floating the adjustment of the size of bed to the ecology to make the ecology float the bed and can adapt to different region scenes in a flexible way, need not to float the bed to the ecology of different region scenes configuration multiple sizes.

In this embodiment, in conjunction with fig. 4, the assembly body 171 may include: a first connecting pipe 1711, a second connecting pipe 1712, a third connecting pipe 1713 and a fourth connecting pipe 1714. The first connecting pipeline 1711, the second connecting pipeline 1712, the third connecting pipeline 1713 and the fourth connecting pipeline 1714 are connected end to end. The first connecting pipe 1711 and the third connecting pipe 1713 are located opposite to each other, and the second connecting pipe 1712 and the fourth connecting pipe 1714 are located opposite to each other.

When the telescopic structure is provided, it may be performed in one of the following three embodiments.

In the first embodiment, the first connecting pipe 1711 and the third connecting pipe 1713 are provided as a telescopic structure.

In the second embodiment, the second connecting pipe 1712 and the fourth connecting pipe 1714 are provided as a telescopic structure.

In the third embodiment, the first connecting pipe 1711, the second connecting pipe 1712, the third connecting pipe 1713, and the fourth connecting pipe 1714 are made of a stretchable structure.

In practical applications, the first connecting pipe 1711, the second connecting pipe 1712, the third connecting pipe 1713, and the fourth connecting pipe 1714 may be made of the same material. For example, the first connection pipe 1711, the second connection pipe 1712, the third connection pipe 1713, and the fourth connection pipe 1714 may be PVC pipes. In addition, if the first connecting pipe 1711, the second connecting pipe 1712, the third connecting pipe 1713 and the fourth connecting pipe 1714 are all retractable structures, the structures of the first connecting pipe 1711, the second connecting pipe 1712, the third connecting pipe 1713 and the fourth connecting pipe 1714 may be similar, so that only the first connecting pipe 1711 will be further described below.

In this embodiment, in conjunction with fig. 5, the first connecting pipe 1711 may include a first sub-pipe 1711a and a second sub-pipe 1711 b. One end of the first sub-pipeline 1711a is sleeved on the second sub-pipeline 1711b, the other end of the first sub-pipeline 1711a is connected with the second connecting pipeline 1712, and one end of the second sub-pipeline 1711b, which is far away from the first sub-pipeline 1711a, is connected with the fourth connecting pipeline 1714. Wherein the first subduct 1711a is movably connected with the second subduct 1711 b. In this way, the length of the first connecting pipeline 1711 can be adjusted, so that the size of the ecological floating bed can be adjusted by the cooperation among the first connecting pipeline 1711, the second connecting pipeline 1712, the third connecting pipeline 1713 and the fourth connecting pipeline 1714.

Furthermore, a limiting structure 1711c is arranged at one end of the first sub-pipeline 1711a, which is sleeved in the second sub-pipeline 1711b, and a limiting hole 1711d is arranged at one end of the second sub-pipeline 1711b, which is used for sleeving the first sub-pipeline 1711 a. The size of the limiting structure 1711c is larger than that of the limiting hole 1711 d. By the design, the mutual matching between the limiting structure 1711c and the limiting hole 1711d can prevent the first sub-pipeline 1711a from being separated from the second sub-pipeline 1711 b.

In an alternative embodiment, the cross-sectional shape of the first and second subducts 1711a, 1711b is circular.

On the basis of the above example, as an alternative example, a solar power generation device, a motor and a paddle can be arranged on the net-shaped structure floating bed. The solar power generation device is configured to generate power based on solar energy, and drive the motor to rotate based on the generated electric energy, so that the motor drives the paddle to rotate, and further the floating bed with the mesh structure moves slowly in the rough canal-sinking pond structure 110 and the first hardening ditch structure 120 along a direction parallel to a horizontal plane at a constant speed, so that the target aquatic plant objects 130 arranged on the floating bed with the mesh structure can be ensured to uniformly absorb eutrophic substances in water flowing through the rough canal-sinking pond structure 110 and the first hardening ditch structure 120.

In the above example, the net-shaped floating bed may further include a lifting structure, so that the net-shaped floating bed can be lifted in the gravity direction. Based on this, on the one hand, the ability of absorbing eutrophic substances in the water flow can be improved, and on the other hand, the elevating height can be adjusted to meet specific irrigation and drainage requirements (thus, a water level sensor can be arranged on the net-shaped floating bed to detect the water quantity in the ditch, so that the configured controller can control the elevating structure based on the water quantity).

Wherein the lifting of the lifting structure is controlled, the buoyancy of the lifting structure can be controlled based on the amount of gas in the control airbag, so as to realize the lifting of the net-structure floating bed in water (for the floating assembly in the ring-structure floating bed, refer to this example).

Further, on the basis of the above example, after the biochar is saturated, the biochar can be arranged in the target farmland, so that recycling can be realized, and the resource utilization rate can be improved.

Moreover, the novel ecological ditch system 100 is as follows in a specific application example:

in the rice planting season, the average concentration of TP (total phosphorus) in the surface water of the field is 0.58mg L^-1(bad V class) and the risk of phosphorus pollution is highest in the form of particles, and the average concentration of TP is reduced to 0.17mg L after the field water is treated by the novel ecological ditch system 100^-1(class III, meeting the environmental quality standard of surface water GB 3838-2002); field surface water NH₄ ⁺Average concentration of-N1.18 mg L^-1(class IV), high risk of nutrient salt contaminationAfter the field water is treated by the novel ecological ditch system 100, the water body NH₄ ⁺Average concentration of-N dropped to 0.21mg L^-1(class II).

To sum up, the novel ecological irrigation canals and ditches system 100 for preventing and treating farmland non-point source pollution that this application provided can carry out effectual absorption to the eutrophic material in the rivers that flow out in the target farmland 200 through the cooperation setting of ditch-sink pond structure 110, first sclerosis irrigation canals and ditches structure 120, target aquatic plant object 130 and target absorption filler material 140 to improve the prevention and cure effect to farmland non-point source pollution, and then improve the relatively poor problem of prevention and cure effect that exists in the current farmland non-point source pollution prevention and cure technique, have higher practical value. And, the novel ecological irrigation and drainage system 100 that this application provided can form based on the transformation of existing farmland irrigation and drainage system for can not invade the area of farmland by a large scale, and compare in carrying out the scheme centralized processing to the farmland drainage, can make the running cost reduce.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A novel ecological ditch system for preventing and treating farmland non-point source pollution, which is characterized by comprising:

a canal-pond structure in communication with the target farm;

2. The novel ecological ditch system for controlling farmland non-point source pollution according to claim 1, characterized in that the target aquatic plant objects include canna, wild pinwheel grass and watermifoil.

3. The novel ecological ditch system for controlling farmland non-point source pollution according to claim 1, characterized in that the target adsorption filling material comprises granular rape straw biochar;

wherein the grain size of the rape straw biochar is 0.2-0.5 mm.

4. The novel ecological ditch system for controlling farmland non-point source pollution according to claim 3, characterized in that the rape straw biochar is arranged in a nylon mesh bag arranged at the end of the first hardened ditch structure in the first direction;

5. The novel ecological ditch system for preventing and treating farmland non-point source pollution as claimed in claim 4, wherein the nylon mesh bag has a length of 700mm, a width of 480mm and a hole diameter of 0.125 mm.

6. The novel ecological ditch system for preventing and treating farmland non-point source pollution according to claim 1, which further comprises:

7. The novel ecological ditch system for preventing and treating farmland non-point source pollution according to claim 1, which further comprises:

8. The novel ecological ditch system for controlling farmland non-point source pollution according to claim 7, characterized in that the ratio between the sum of the floor areas of the canal-sinking pond structure, the first hardened ditch structure and the second hardened ditch structure and the floor area of the target farmland is greater than or equal to 3% and less than or equal to 5%.

9. The novel ecological ditch system for preventing and treating farmland non-point source pollution according to claim 7, further comprising:

wherein, the overflow weir structure is a plurality of.

10. The ecological trench system for controlling farmland non-point source pollution according to claim 9, wherein one end of the overflow weir structure is disposed at the bottom of the first hardened trench structure, and the other end extends in a direction close to the top of the first hardened trench structure;