Comprehensive saline and alkali region water resource collection and utilization system

Abstract

The invention discloses a comprehensive saline and alkali region water resource collection and utilization system. The comprehensive saline and alkali region water resource collection and utilizationsystem comprises a soil body, a vent hole and a storage and drainage well; the soil body comprises a planting soil layer, a water permeable film layer, a water storage layer, a waterproof layer and asaline-alkali soil layer which are sequentially arranged from top to bottom; the vent hole extends downward from the planting soil layer of the soil body to the water permeable film layer; a groove protruding into the saline-alkaline soil layer is formed in the lower surface of the water storage layer, and the groove is internally provided with a dark pipe; the dark pipe is connected with the communicating storage and drainage well in a slope direction; and the storage and drainage well is arranged in the soil body, the depth of the storage and drainage well extends from top to bottom to the lower part of the groove, the wall of the storage and drainage well is of a watertight structure, and an overflow drainage drain pipe is arranged on the wall of the storage and drainage well and has ahorizontal height of 20-50 cm in the planting soil layer. The comprehensive salt and alkali region water resource collection and utilization system can effectively collect rainwater which penetrates into the planting soil layer after the rainfall, and the situation that slat is returned from the saline-alkaline soil layer to the planting soil layer is not caused.

Description

technical field [0001] The invention belongs to the field of water resources treatment in saline-alkali areas, and in particular relates to a comprehensive system for collecting and utilizing water resources in saline-alkali areas. 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 economic developm...

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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