Sewage purification system of strip wetland in paddy field drainage ditch in irrigated area

Abstract

The invention relates to an irrigation district rice field drainage ditch band-shaped wetland sewage purifying system. The structure of the system comprises stepped flat bottom wetlands 4 and semi-permeable stone cages 5; and the stepped flat bottom wetlands 4 are formed by reconstructing the bottom slop of a rice field drainage ditch 3, the semi-permeable stone cages 5 separate the stepped flat bottom wetlands 4, and a wetland purifying system is arranged in each of the semi-permeable stone cages 5. The bottom slop of the rice drainage ditch is rectified to form the stepped flat bottom, the stepped flat bottom wetlands are separated by the semi-permeable stone cages, and wetland purifying systems are arranged in the semi-permeable stone cages, so ecologic and healthy water needs of a wetland system in the drainage ditch in the drainage intermission period are guaranteed, the purifying effect is ensured, and the waterpower stay time of farmland drained water in the band-shaped wetland is effectively prolonged in the normal drainage period of farmland. Water plants in the wetland purifying systems adopt rice, cress and other crops, and the water plants in the wetland purifying systems in the drainage ditch are used to purify rice field drained water and increase the economy income to a certain degree.

Description

technical field [0001] The invention relates to a belt-shaped wetland purification system for paddy field drainage ditch in irrigation area, which is suitable for paddy field in irrigation area, can ensure the water demand of the wetland purification system in the drainage ditch during the intermittent period of drainage and fully utilize the space of the drainage ditch to plant crops, and further improve the purification effect of farmland non-point source pollution. . The invention belongs to the technical field of farmland non-point source pollution control. Background technique [0002] Farmland non-point source pollution control technologies mainly include constructed wetlands, coastal buffer zones, and ecological ditches. Because of the large area occupied by constructed wetlands and coastal buffer zones, it is difficult to adapt to the national conditions of my country with a lot of people and little land, and its popularization and application are limited to a certa...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a belt-shaped wetland purification system for paddy field drainage ditches in irrigation areas. Maintaining enough water to supply the ecological health of the wetland system will lead to unsatisfactory purification effects and difficult maintenance of the purification system during the intermittent period of drainage. The slope at the bottom of the drainage ditch will be changed to a stepped flat-bottomed ditch to ensure the wetland purification system needs during the intermittent period of drainage. water irrigation area paddy field drainage ditches ditches strip wetland net pollution

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