Saline-alkali region road and green space water resource regulation and storage utilization system

Abstract

The invention discloses a saline-alkali region road and green space water resource regulation and storage utilization system. The saline-alkali region road and green space water resource regulation and storage utilization system comprises a soil body and water storage wells; the soil body comprises a planting soil layer, a water permeable membrane layer, an aquifer layer, a waterproof layer and asaline-alkali soil layer which are arranged from top to bottom in sequence; the planting soil layer is provided with a downward concave green space, and a pit is formed in the lowest point of the downward concave green space; the depth of the pit extends to the water permeable membrane layer, and the pit is filled with a mixture of planting soil and mountain skin sand; a seepage well is further arranged in the downward concave green space, and the seepage well extends 50-120 cm downward from the upper surface of the planting soil layer and with a distance of 10-20 cm to the water permeable membrane layer; and the seepage well internally includes a sand filter and/or aggregate chips, and inclined downward seepage pipes leading to the planting soil layer are arranged on the lower part of theouter wall of the seepage well. The saline-alkali region road and green space water resource regulation and storage utilization system can effectively collect rainwater collected in the downward concave green space after rainfall, and does not cause salt in the saline-alkali soil layer to be returned to the planting soil layer; and the saline-alkali region road and green space water resource regulation and storage utilization system can further reduce the greening elevation of saline-alkali land, reduce the amount of earthwork and reduce runoff pollution to roads and other surrounding facilities.

Description

technical field [0001] The invention belongs to the field of water resources treatment in saline-alkali land, and in particular relates to a system for regulation, storage and utilization of road and green land water resources in saline-alkali land. Background technique [0002] my country's per capita water resource consumption is only 30% of the world level, and most areas are short of water or severely short of water. In recent years, with the further deepening of urbanization, the demand for water resources is increasing. How to develop efficiently Utilization of water resources has become a challenge that the whole society needs to face together. [0003] In order to explore the path of sponge city construction under different natural environments and urban forms, the country has carried out two batches of 30 sponge city pilot projects. At present, the construction of sponge cities has been carried out in full swing across the country, and different rainwater is used for...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing method of "flooding with stone chips" and "salt drainage through hidden pipes" to control saline-alkali land is that after the rainwater infiltrates into the soil, it enters the saline-alkali layer through the stone chip layer, or is directly discharged into the municipal 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 road drainage pressure and waterlogging risk. At the same time, the green land soil washes the road surface with the runoff, causing runoff pollution such as mud left on the road after rain; the amount of land for greening is large and uneconomical

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