Cascaded high-efficiency reuse facilities for the tail water network of rivers and lakes near the coast of vegetable fields in the mid-mountainous area

Abstract

The invention discloses a mountainous and semi-mountainous area river-lake nearshore vegetable field tail water network terraced efficient recycling facility which mainly comprises a vegetable field irrigation and drainage canal, a water storage pool, irrigation pools, water pumps, irrigation devices and a water, fertilizer and pesticide filling pool. The water storage pool is arranged on the first-step land, and connected with the vegetable field irrigation and drainage canal through a water diversion pipe; the irrigation pools are arranged from second-step land to highest-step land respectively, and the irrigation pools on every two adjacent step lands are connected through a water outlet pipe, one water pump and a water lifting pipe in sequence. Each irrigation pool is connected with one irrigation device. Vegetable land tail water with high-concentration nitrogen and phosphorus is intercepted and prevented from being directly drained into water bodies of rivers and lakes, the chemical fertilizer application amount is reduced, network terraced redistribution recycling of farmland tail water can be achieved in the area space, the hydraulic gradient of the mountainous and semi-mountainous area is utilized according to local conditions to carry out farmland tail water gravity irrigation, vegetable field farmland non-point source pollution is reduced, and river-lake water environment safety is protected.

Description

technical field [0001] The invention relates to the technical fields of agricultural environmental protection and efficient utilization of water resources. Specifically, it relates to a cascaded high-efficiency reuse facility for the tail water network of rivers and lakes near shores of vegetable fields in the mid-mountainous area. Background technique [0002] Vegetable land is widely distributed in the farmland near the river and lake, and it is one of the important land use methods of the farmland near the river and lake. Vegetable root systems are underdeveloped and highly dependent on water and fertilizers. A large amount of fertilization and irrigation is required to ensure the growth of vegetables, and the multiple cropping index is high, resulting in a high accumulation of nitrogen and phosphorus nutrients in the vegetable surface soil. When the vegetable field is irrigated or rained, excess irrigation water or runoff from rainfall will carry the nitrogen and phosph...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the pollution of river and lake water by the nitrogen-containing and phosphorus high-concentration vegetable tail water discharged from the near-shore vegetable fields of rivers and lakes in the mid-mountainous area, and the large loss of nitrogen and phosphorus in farmland caused by large amounts of water and fertilizers in the current vegetable planting process Problem, the present invention provides a cascaded high-efficiency reuse facility for the tailwater network of rivers and lakes near the coast of vegetable fields in the mid-mountainous area

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