Permeation-well-containing saline-alkali region water resource collecting and utilizing system

Abstract

The invention discloses a permeation-well-containing saline-alkali region water resource collecting and utilizing system, which comprises a soil body and water storage wells. The soil body comprises aplanting soil layer, a first permeable membrane layer, a water storage layer, waterproof layers and a saline-alkali soil layer which are sequentially arranged from top to bottom; a quick permeation purification well is arranged in the planting soil layer, extends downwards to the first permeable membrane layer from the upper surface of the planting soil layer, and comprises a sand filtering layer, a second permeable membrane layer and a stone chip layer from top to bottom; a trench protruding into the saline-alkali soil layer is formed in the lower surface of the water storage layer and internally provided with a concealed conduit; the concealed conduit is connected and communicates with the water storage wells in the slope direction; and the water storage wells are formed in the soil body at intervals, and the depths of the water storage wells extend to the lower part of the trench from top to bottom. According to the permeation-well-containing saline-alkali region water resource collecting and utilizing system, rainwater collected into downward-sunken green land after precipitation is quickly and 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.

Description

technical field [0001] The invention belongs to the field of water resource treatment in saline-alkali land, and in particular relates to a system for collecting and utilizing water resources in saline-alkali land containing permeable wells. 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 capacity of plants, forming salt damage. Salt comes with water and goes away 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 economi...

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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