Polder area water circulation rice field non-point source pollution treatment system

Abstract

The invention provides a polder area water circulation rice field non-point source pollution treatment system which comprises a polder area. The polder area is composed of a polder embankment, a polder area gate station, an outside-polder river channel and an inside-polder river channel; the polder area gate station is arranged at the communication part of the outside-polder river channel and the inside-polder river channel; field parcels which are separated by ridges and are perpendicular to the inside-polder river channel are arranged in the polder area; and irrigation of crops in the field parcels is conducted by guiding water from the inside-polder river channel through an irrigation pump station and an irrigation pipeline, farmland recession water in the field parcels returns to the inside-polder river channel through ecological ditches, and therefore water circulation is formed. According to the polder area water circulation rice field non-point source pollution treatment system, the characteristics of the polder area can be fully utilized, a relatively closed water body environment is formed, and a water body in the polder area is recycled; by combining a digitally-controlled precise irrigation and drainage system and a green prevention and control system, water and nutrients can be recycled under daily working conditions, the irrigation water consumption, the chemical fertilizer consumption and the pesticide consumption of agricultural production are reduced, the non-point source pollution load is reduced, it is guaranteed that the farmland recession water is discharged to the outside-polder river channel in order under the rainstorm working condition, and the influence on the surface water environment is reduced.

Description

technical field [0001] The invention relates to a non-point source pollution control system for polder water circulation paddy fields. Background technique [0002] The results of the second national survey of pollution sources show that the total discharge of pollutants from agricultural sources in my country is still at a high level, and the discharges of chemical oxygen demand, total nitrogen and total phosphorus from agricultural sources account for 49.8%, 46.5%, and 67.2%, of which the planting industry accounts for a prominent proportion of the total agricultural sources, and the situation in the prevention and control of non-point source pollution is still severe. Due to the dispersal and complexity of its sources, coupled with the uncertainty and randomness of its emissions, the governance of non-point source pollution is still a major problem in the current ecological environment and agricultural and rural areas. [0003] my country has a large rice planting area, s...

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Problems solved by technology

Since the polder area can ensure the drainage of drought and the discharge of waterlogging, agricultural production activities are relatively concentrated, and the special water exchange method of the polder area is prone to accumulation of chemical fertilizers, pesticides and other substances, causing serious non-point source pollution, whi

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