Farmland discharge outlet capable of reducing nitrogen and phosphorus non-point source pollutant discharge

Abstract

The utility model discloses a farmland discharge outlet capable of reducing nitrogen and phosphorus non-point source pollutant discharge, which comprises a percolation dam arranged at the position of a farmland ridge discharge outlet and an adjustable waterproof assembly, the percolation dam is filled with a permeable purification material, and the adjustable waterproof assembly is arranged on one side, facing the farmland, of the percolation dam; the adjustable waterproof assembly can adjust the water level height of the farmland so as to meet the water demand requirements of aquatic or humid crops in different growth periods. The device has the functions of water retention in a dry season, farmland runoff purification in a rainwater period or a drainage period and flood regulation and storage, and the height of the farmland water level can be adjusted through the adjustable waterproof assembly according to the water demand requirements of aquatic or hygrophilous crops in different growth periods. The percolation dam body can purify runoff generated by conventional rainfall or runoff at the front end of rainstorm or runoff generated during drainage to a certain degree by filling permeable purification materials, the paddy field can serve as a temporary storage pond in the rainstorm period to slow down the runoff water drainage rate, the downstream flood intensity is relieved, and the effect of flood storage is achieved.

Description

Technical Field

[0001] This utility model relates to the field of farmland emission technology, specifically to a farmland emission outlet that can reduce nitrogen and phosphorus non-point source pollutant emissions. Background Technology

[0002] Farmland is land suitable for growing crops and possessing the conditions necessary for their growth, development, and maturity. Based on its topography, farmland includes paddy fields, which are constructed with embankments to regularly store water for growing aquatic crops such as rice. However, existing paddy fields, relying on embankments to store water, struggle to control water levels. Furthermore, aquatic or wetland crops require adjustments to water levels at different growth stages to meet their water demands, and the drainage process directly releases non-point source pollutants such as nitrogen and phosphorus, causing environmental pollution. Utility Model Content

[0003] In view of the defects of the existing technology, the technical problem to be solved by this utility model is to provide a farmland discharge outlet that can reduce the emission of nitrogen and phosphorus non-point source pollutants, and has the functions of water conservation during the dry season, purification of farmland runoff and flood regulation during the rainy season or the drainage season, and can control the water level.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a farmland discharge outlet that can reduce nitrogen and phosphorus non-point source pollutant emissions, including a seepage dam set at the discharge outlet location on the farmland ridge and an adjustable water-blocking component. The seepage dam is filled with a permeable purification material, and the adjustable water-blocking component is set on the side of the seepage dam facing the farmland. The adjustable water-blocking component can adjust the water level of the farmland to meet the water requirements of aquatic or wetland crops at different growth stages.

[0005] Preferably, the adjustable water-proof component includes an earthen embankment and a rollable plastic film. The rollable plastic film is wrapped around the outside of the earthen embankment to prevent water from entering and clogging the gaps, thereby reducing the water level of the farmland. When adjusting the water level, the height of the earthen embankment is increased or decreased while the rollable plastic film is always wrapped around the earthen embankment, which can prevent a large amount of silt from entering the infiltration dam and clogging the gaps, thus reducing the infiltration efficiency of runoff.

[0006] Preferably, the adjustable water-blocking component includes an earthen embankment and a plastic mudguard. The plastic mudguard is inserted between the earthen embankment and the infiltration dam to block water and maintain the water level of the farmland. When adjusting the water level, the insertion depth is adjusted by raising or lowering the plastic mudguard. This is convenient to operate and can prevent a large amount of sediment from entering the infiltration dam, clogging the gaps, and reducing the infiltration efficiency of runoff.

[0007] Preferably, the adjustable water-blocking component uses a water level control valve, which includes a water level control valve chamber and a lifting valve. The lifting valve is located on the side of the infiltration dam facing the farmland to block water and maintain the water level of the farmland. The water level control valve chamber is located below the farmland surface so that the lifting valve can be completely lowered into the water level control valve chamber. When adjusting the water level, the water-blocking height is adjusted by raising or lowering the lifting valve.

[0008] Preferably, the water level control valve is equipped with an electric control component, which can be remotely controlled.

[0009] Preferably, the infiltration dam has two infiltration layers made of different permeable purification materials, providing multiple filtration methods and improving filtration efficiency.

[0010] The beneficial effects of this utility model are as follows: it has the functions of water conservation during the dry season, purification of farmland runoff during the rainy season or the drainage period, and flood regulation. According to the water requirements of aquatic or wetland crops at different growth stages, the water level of farmland can be adjusted by adjustable water-proof components. The permeable dam body can purify the runoff generated by normal rainfall, the runoff at the front end of rainstorms, or the runoff generated during drainage to a certain extent by filling it with permeable purification materials, thereby reducing the risk of pollutants being discharged downstream and reducing the emission of non-point source pollutants such as nitrogen and phosphorus. During the rainstorm period, the paddy field can be used as a temporary storage pond to slow down the runoff discharge rate and reduce the intensity of downstream floods, thus playing a role in flood regulation. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the use of this utility model;

[0012] Figure 2 This is a schematic diagram of the structure of this utility model (the adjustable waterproof component uses a rollable plastic film).

[0013] Figure 3 This is a schematic diagram of the structure of this utility model (the adjustable water-proof component uses a plastic mudguard).

[0014] Figure 4 This is a schematic diagram of the structure of this utility model (the adjustable water-proof component uses a water level control valve);

[0015] Figure 5 This is a schematic diagram of the structure of a water level control valve;

[0016] In the diagram: 1-Infiltration dam, 2-Earth embankment, 3-Rollable plastic film, 4-Plastic mudguard, 5-Fixed roller, 6-Water level control valve, 7-Water level control valve compartment, 8-Lifting valve. Detailed Implementation

[0017] To better understand the improvements made by this utility model compared to the prior art, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0018] like Figure 1 As shown in Figure 5, a farmland discharge outlet that can reduce the emission of nitrogen and phosphorus non-point source pollutants mainly consists of an infiltration dam 1 set at the discharge outlet location on the farmland ridge and an adjustable water-proof component, which can reduce the emission of pollutants such as farmland sediment, nitrogen and phosphorus.

[0019] The infiltration dam 1 is filled with permeable purification materials, preferably with two infiltration layers made of different permeable purification materials. By filling with different permeable purification materials, the runoff generated by normal rainfall, the runoff at the front end of rainstorms, or the runoff generated during drainage can be purified to a certain extent, reducing the risk of pollutants being discharged downstream, effectively reducing the emission of non-point source pollutants such as nitrogen and phosphorus, and during the rainstorm period, the paddy field can be used as a temporary regulating pond to slow down the runoff discharge rate, reduce the intensity of downstream floods, and play a role in flood regulation.

[0020] An adjustable water-blocking component is installed on the side of the infiltration dam 1 facing the farmland, which can adjust the water level of the farmland to meet the water requirements of aquatic or wetland crops at different growth stages. To prevent a large amount of silt from entering the infiltration dam and clogging the gaps, thus reducing the infiltration efficiency of runoff, a rollable plastic film 3 or a plastic mudguard 4 can be used. For convenient operation and remote control, a water level control valve 6 can be used.

[0021] When the adjustable waterproofing assembly mainly consists of an earthen embankment 2 and a rollable plastic film 3, the rollable plastic film 3 is wrapped around the outside of the earthen embankment 2 to prevent water from entering and maintain the water level of the farmland. The rollable plastic film 3 covers the earthen embankment 2 except for the bottom, and the end of the rollable plastic film 3 away from the infiltration dam 1 is fixed by additional soil. When adjusting the water level, the height of the earthen embankment 2 is increased or decreased, while always keeping the rollable plastic film 3 wrapped around the earthen embankment 2.

[0022] When the adjustable water-blocking component mainly consists of the earthen embankment 2 and the plastic mudguard 4, the plastic mudguard 4 is inserted between the earthen embankment 2 and the infiltration dam 1 to block water and maintain the water level of the farmland. When adjusting the water level, the insertion depth is adjusted by raising or lowering the plastic mudguard 4, which is easy to operate.

[0023] When the adjustable water-blocking assembly uses a water level control valve 6, the water level control valve 6 mainly consists of a water level control valve chamber 7 and a lifting valve 8. The water level control valve 6 is equipped with an electric control component for remote control. The lifting valve 8 is installed on the side of the infiltration dam 1 facing the farmland to block water and maintain the water level in the farmland. The water level control valve chamber 7 is located below the farmland surface, allowing the lifting valve 8 to be completely lowered into the chamber, thus draining the water from the paddy field. When adjusting the water level, the water-blocking height is adjusted by the lifting height of the lifting valve 8. The lifting valve 8 moves up and down relative to the water level control valve chamber 7 and is fixed via a rotating threaded rod and a fixed roller 5.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A farmland discharge outlet capable of reducing nitrogen and phosphorus non-point source pollutant emissions, characterized in that: The system includes a permeable dam (1) located at the discharge outlet of the farmland embankment and an adjustable water-proof component. The permeable dam (1) is filled with a permeable purification material, and the adjustable water-proof component is located on the side of the permeable dam (1) facing the farmland. The adjustable water-proof component can adjust the water level of the farmland to meet the water requirements of aquatic or wetland crops at different growth stages. The adjustable water-proof component includes a soil embankment (2) and a rollable plastic film (3). The rollable plastic film (3) is wrapped around the soil embankment (2) to prevent water from entering and maintain the water level of the farmland. When adjusting the water level, the height of the soil embankment (2) is increased or decreased, and the rollable plastic film (3) is always kept wrapped around the soil embankment (2).

2. The farmland discharge outlet for reducing nitrogen and phosphorus non-point source pollutant emissions according to claim 1, characterized in that: The infiltration dam has two infiltration layers made of different permeable purification materials.

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