Drainage regulation and storage purification wetland construction system for dry land in irrigation area

Abstract

The invention provides an irrigated area dry land sheetflow type water drainage, regulation and storage purification wet land built system. The system structurally comprises a dry land, gabion ridges, plant isolation belts and a regulation and storage purification pond wet land. In a water drainage period, water in the land sequentially flows through the gabion ridges, the plant isolation belts and the regulation and storage purification pond wet land in a sheetflow mode, and nitrogen and phosphorus nutrients, pesticide residue harmful matter in the water can be effectively intercepted and purified; in a rainfall period, the regulation and storage purification pond wet land can effectively regulate overland rainwater runoff in an irrigated area, and the flood pressure of a reception river is reduced; in an irrigation period, water in the regulation and storage purification pond wet land can be used for reuse. The irrigated area dry land sheetflow type water drainage, regulation and storage purification wet land built system has the advantages that non-point source pollution caused by irrigated area dry land sheetflow type water drainage can be reduced, farmland rainwater overland runoff and flood resources further can be effectively regulated, the construction process is simplified, popularization is facilitated, agricultural production can be remarkably improved, the ecological environment is protected, and sustainable development of the agriculture in an ecological irrigation district is achieved.

Description

technical field [0001] The invention relates to a wetland construction system for flood drainage regulation, storage and purification of dry land in an irrigation area, and belongs to the technical field of farmland non-point source pollution control. Background technique [0002] Non-point source pollution of farmland drainage in irrigation areas has become a major problem affecting my country's water environment, and it is the main source of pollution for eutrophication in rivers and lakes. Aiming at non-point source pollution caused by farmland drainage, people have adopted technologies such as artificial wetlands, plant floating beds, and buffer zones, such as patent CN200910232224. Pollution of the water environment; patent CN201420627068.8 realizes the regeneration of natural zeolite and the full utilization of nutrients in sewage by building a renewable zeolite-ecological ditch combined treatment system. The above-mentioned engineering technologies play a certain rol...

AI Technical Summary

Problems solved by technology

The above-mentioned engineering technologies play a certain role in purifying and controlling farmland non-point source pollution, but they need to build a large number of small engineering areas such as ditches and buffer zones, and have not transformed the original irrigation areas according to local conditions.

Not only does this require significant capital investment, but it also has serious impacts on the integrity of irrigated districts and farmland

On the other hand, the existing farmland non-point source pollution control engineering technology often has a single function. While reducing farmland drainage pollution, it cannot regulate and store rainwater surface runoff in irrigation areas, which undoubtedly causes serious waste of water resources.

[0003] my country has a lot of people and little land, so farmland non-point source pollution control technology should fully consider local conditions, reduce land use and follow-up maintenance, and at the same time should couple multiple functions such as sewage control, rainwater regulation and storage, and recycling. rare

Images