Drainage-valve-containing saline-alkali region water resource collecting and utilizing system

Abstract

The invention discloses a drainage-valve-containing saline-alkali region water resource collecting and utilizing system, which comprises a soil body and vent holes. The soil body comprises a plantingsoil layer, a permeable membrane layer, a water storage layer, waterproof layers and a saline-alkali soil layer which are sequentially arranged from top to bottom; the planting soil layer and the water storage layer are isolated through the permeable membrane layer; the water storage layer and the saline-alkali soil layer are isolated through the waterproof layers; junctions of the outer side of the soil body and surrounding buildings or structures are inversely packed through the lateral waterproof layers; and the vent holes extend downwards to the permeable membrane layer from the planting soil layer of the soil body. Rainwater permeating into the planting soil layer after precipitation can be effectively collected, and salt return of the saline-alkali soil layer to the planting soil layer is avoided; and in addition, the greening elevation of saline-alkali land can further be lowered, the earth volume is decreased, and meanwhile runoff pollution to surrounding facilities such as roads is reduced.

Description

technical field [0001] The invention belongs to the field of water resources utilization in saline-alkali areas, in particular to a system for collecting and utilizing water resources in saline-alkali areas with a drainage valve. Background technique [0002] Rainwater is a very precious freshwater resource, especially for the coastal saline-alkali land, which is a serious water shortage area, and the collection and utilization of rainwater is even more precious. Due to the lack of water in saline-alkali land, the salt concentration in the soil exceeds the tolerance of plants, forming salt damage. Salt comes with water, and salt goes with water, so sufficient fresh water supply must be ensured, so that saline-alkali land resources can be used sustainably. [0003] The total area of ​​coastal saline-alkali soil in my country is 500×10 4 hm 2 ,. With the development of economy and industry in recent years, saline-alkali areas have become a new frontier for economic develop...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing method of "flooding stone chips" and "salt drainage through hidden pipes" to control saline-alkali land is that the rainwater after rainfall infiltrates into the soil, enters the saline-alkali layer through the stone chip layer, or is directly discharged into the municipal waste water. Drainage pipe network, rainwater cannot be effectively used, and at the same time, a large amount of nutrients such as nitrogen, phosphorus, and potassium are also discharged into the municipal rainwater system during the fertilization process, which also causes eutrophication of downstream water bodies; surface runoff that does not have time to infiltrate during rainfall Rainwater flows into low-potential areas such as surrounding roads, which increases the road drainage pressure and the risk of waterlogging. At the same time, the soil in the green space washes the road surface with the runoff, causing runoff pollution such as mud left on the road after the rain; the amount of land for greening is large and uneconomical

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