A method for preventing and controlling agricultural non-point source pollution applied to polders

Abstract

The invention discloses an agricultural non-point source pollution prevention and control method applied to a polder, and belongs to the technical field of agricultural pollution treatment. The specific method includes the following steps: step 1: obtaining a farmland distribution map, and constructing a farmland canal distribution map according to the obtained farmland distribution map; Step 2: Identify the location of the natural water body, and draw it in the distribution map of farmland canals, and set the effective volume between anaerobic ponds, facultative ponds, aerobic ponds and storage ponds; Step 3: Determine anaerobic ponds, facultative ponds, and facultative ponds The locations of ponds, aerobic ponds and water storage ponds are drawn in the distribution map of farmland canals; Step 4: Set overflow dams on the side of the storage ponds close to the natural water body, and dug between the overflow dam and the natural water body. water ditch; step 5: set up a detection module and a water pump in the storage pond, and control the operation of the water pump according to the detection results of the detection module, and the detection results include qualified and unqualified detection.

Description

A kind of agricultural non-point source pollution prevention and control method applied in polder area technical field The invention belongs to the technical field of agricultural pollution treatment, specifically a kind of agricultural non-point source pollution prevention and control applied to polders method. Background technique In the agricultural development process, the chemical fertilizer used in farmland increases continuously, but the chemical fertilizer utilization rate is relatively low, and this causes The fertilizer residues in agricultural drainage ditches are too high, and the unused nutrients flow into the receiving water bodies through runoff, which is harmful to the surrounding environment. The surrounding ecological environment has caused serious pollution and even destroyed its water quality, which is one of the causes of eutrophication of the receiving water. main reason. At present, artificial wetland technology is usually used in river basin...

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Problems solved by technology

[0002] In the process of agricultural development, the use of chemical fertilizers in farmland continues to increase, but the utilization rate of chemical fertilizers is relatively low, which results in excessive chemical fertilizer residues in agricultural drainage ditches, and unused nutrients flow into the receiving water body through runoff, causing damage to the surrounding areas. The ecological environment has caused serious pollution, and even destroyed its water quality, which is one of the main reasons for the eutrophication of the receiving water body.

[0003] At present, constructed wetland technology is usually used in the water purification treatment of river basins to remove pollutants in water by ecological means. However, the construction of constructed wetlands needs to occupy a certain scale of the entire land, which is limited for planning space or involves basic farmland protection policies. Constructed wetlands often do not have the construction conditions or the scale that can be built cannot meet the restoration target requirements. In addition, the irrigation canals used in the existing agricultural planting areas are mostly simple canal structures, and the slopes are smooth slopes constructed of soil or cement. The main function is water diversion, seasonal water storage inside the channel, natural growth of animals and plants, generally does not have considerable ecological purification function, resulting in poor pollution control effect of farmland tail water

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